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Nathan
2025-04-06 23:50:55 -05:00
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18
Documentation/devicetree/bindings/clock/altr_socfpga.txt Normal file
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Device Tree Clock bindings for Altera's SoCFPGA platform
This binding uses the common clock binding[1].
[1] Documentation/devicetree/bindings/clock/clock-bindings.txt
Required properties:
- compatible : shall be one of the following:
"altr,socfpga-pll-clock" - for a PLL clock
"altr,socfpga-perip-clock" - The peripheral clock divided from the
PLL clock.
- reg : shall be the control register offset from CLOCK_MANAGER's base for the clock.
- clocks : shall be the input parent clock phandle for the clock. This is
either an oscillator or a pll output.
- #clock-cells : from common clock binding, shall be set to 0.
Optional properties:
- fixed-divider : If clocks have a fixed divider value, use this property.

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Binding for the axi-clkgen clock generator
This binding uses the common clock binding[1].
[1] Documentation/devicetree/bindings/clock/clock-bindings.txt
Required properties:
- compatible : shall be "adi,axi-clkgen".
- #clock-cells : from common clock binding; Should always be set to 0.
- reg : Address and length of the axi-clkgen register set.
- clocks : Phandle and clock specifier for the parent clock.
Optional properties:
- clock-output-names : From common clock binding.
Example:
clock@0xff000000 {
compatible = "adi,axi-clkgen";
#clock-cells = <0>;
reg = <0xff000000 0x1000>;
clocks = <&osc 1>;
};

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Device Tree Clock bindings for Calxeda highbank platform
This binding uses the common clock binding[1].
[1] Documentation/devicetree/bindings/clock/clock-bindings.txt
Required properties:
- compatible : shall be one of the following:
"calxeda,hb-pll-clock" - for a PLL clock
"calxeda,hb-a9periph-clock" - The A9 peripheral clock divided from the
A9 clock.
"calxeda,hb-a9bus-clock" - The A9 bus clock divided from the A9 clock.
"calxeda,hb-emmc-clock" - Divided clock for MMC/SD controller.
- reg : shall be the control register offset from SYSREGs base for the clock.
- clocks : shall be the input parent clock phandle for the clock. This is
either an oscillator or a pll output.
- #clock-cells : from common clock binding; shall be set to 0.

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This binding is a work-in-progress, and are based on some experimental
work by benh[1].
Sources of clock signal can be represented by any node in the device
tree. Those nodes are designated as clock providers. Clock consumer
nodes use a phandle and clock specifier pair to connect clock provider
outputs to clock inputs. Similar to the gpio specifiers, a clock
specifier is an array of one more more cells identifying the clock
output on a device. The length of a clock specifier is defined by the
value of a #clock-cells property in the clock provider node.
[1] http://patchwork.ozlabs.org/patch/31551/
==Clock providers==
Required properties:
#clock-cells: Number of cells in a clock specifier; Typically 0 for nodes
with a single clock output and 1 for nodes with multiple
clock outputs.
Optional properties:
clock-output-names: Recommended to be a list of strings of clock output signal
names indexed by the first cell in the clock specifier.
However, the meaning of clock-output-names is domain
specific to the clock provider, and is only provided to
encourage using the same meaning for the majority of clock
providers. This format may not work for clock providers
using a complex clock specifier format. In those cases it
is recommended to omit this property and create a binding
specific names property.
Clock consumer nodes must never directly reference
the provider's clock-output-names property.
For example:
oscillator {
#clock-cells = <1>;
clock-output-names = "ckil", "ckih";
};
- this node defines a device with two clock outputs, the first named
"ckil" and the second named "ckih". Consumer nodes always reference
clocks by index. The names should reflect the clock output signal
names for the device.
==Clock consumers==
Required properties:
clocks: List of phandle and clock specifier pairs, one pair
for each clock input to the device. Note: if the
clock provider specifies '0' for #clock-cells, then
only the phandle portion of the pair will appear.
Optional properties:
clock-names: List of clock input name strings sorted in the same
order as the clocks property. Consumers drivers
will use clock-names to match clock input names
with clocks specifiers.
clock-ranges: Empty property indicating that child nodes can inherit named
clocks from this node. Useful for bus nodes to provide a
clock to their children.
For example:
device {
clocks = <&osc 1>, <&ref 0>;
clock-names = "baud", "register";
};
This represents a device with two clock inputs, named "baud" and "register".
The baud clock is connected to output 1 of the &osc device, and the register
clock is connected to output 0 of the &ref.
==Example==
/* external oscillator */
osc: oscillator {
compatible = "fixed-clock";
#clock-cells = <1>;
clock-frequency = <32678>;
clock-output-names = "osc";
};
/* phase-locked-loop device, generates a higher frequency clock
* from the external oscillator reference */
pll: pll@4c000 {
compatible = "vendor,some-pll-interface"
#clock-cells = <1>;
clocks = <&osc 0>;
clock-names = "ref";
reg = <0x4c000 0x1000>;
clock-output-names = "pll", "pll-switched";
};
/* UART, using the low frequency oscillator for the baud clock,
* and the high frequency switched PLL output for register
* clocking */
uart@a000 {
compatible = "fsl,imx-uart";
reg = <0xa000 0x1000>;
interrupts = <33>;
clocks = <&osc 0>, <&pll 1>;
clock-names = "baud", "register";
};
This DT fragment defines three devices: an external oscillator to provide a
low-frequency reference clock, a PLL device to generate a higher frequency
clock signal, and a UART.
* The oscillator is fixed-frequency, and provides one clock output, named "osc".
* The PLL is both a clock provider and a clock consumer. It uses the clock
signal generated by the external oscillator, and provides two output signals
("pll" and "pll-switched").
* The UART has its baud clock connected the external oscillator and its
register clock connected to the PLL clock (the "pll-switched" signal)

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* Samsung Exynos4 Clock Controller
The Exynos4 clock controller generates and supplies clock to various controllers
within the Exynos4 SoC. The clock binding described here is applicable to all
SoC's in the Exynos4 family.
Required Properties:
- comptible: should be one of the following.
- "samsung,exynos4210-clock" - controller compatible with Exynos4210 SoC.
- "samsung,exynos4412-clock" - controller compatible with Exynos4412 SoC.
- reg: physical base address of the controller and length of memory mapped
region.
- #clock-cells: should be 1.
The following is the list of clocks generated by the controller. Each clock is
assigned an identifier and client nodes use this identifier to specify the
clock which they consume. Some of the clocks are available only on a particular
Exynos4 SoC and this is specified where applicable.
[Core Clocks]
Clock ID SoC (if specific)
-----------------------------------------------
xxti 1
xusbxti 2
fin_pll 3
fout_apll 4
fout_mpll 5
fout_epll 6
fout_vpll 7
sclk_apll 8
sclk_mpll 9
sclk_epll 10
sclk_vpll 11
arm_clk 12
aclk200 13
aclk100 14
aclk160 15
aclk133 16
mout_mpll_user_t 17 Exynos4x12
mout_mpll_user_c 18 Exynos4x12
mout_core 19
mout_apll 20
[Clock Gate for Special Clocks]
Clock ID SoC (if specific)
-----------------------------------------------
sclk_fimc0 128
sclk_fimc1 129
sclk_fimc2 130
sclk_fimc3 131
sclk_cam0 132
sclk_cam1 133
sclk_csis0 134
sclk_csis1 135
sclk_hdmi 136
sclk_mixer 137
sclk_dac 138
sclk_pixel 139
sclk_fimd0 140
sclk_mdnie0 141 Exynos4412
sclk_mdnie_pwm0 12 142 Exynos4412
sclk_mipi0 143
sclk_audio0 144
sclk_mmc0 145
sclk_mmc1 146
sclk_mmc2 147
sclk_mmc3 148
sclk_mmc4 149
sclk_sata 150 Exynos4210
sclk_uart0 151
sclk_uart1 152
sclk_uart2 153
sclk_uart3 154
sclk_uart4 155
sclk_audio1 156
sclk_audio2 157
sclk_spdif 158
sclk_spi0 159
sclk_spi1 160
sclk_spi2 161
sclk_slimbus 162
sclk_fimd1 163 Exynos4210
sclk_mipi1 164 Exynos4210
sclk_pcm1 165
sclk_pcm2 166
sclk_i2s1 167
sclk_i2s2 168
sclk_mipihsi 169 Exynos4412
sclk_mfc 170
sclk_pcm0 171
sclk_g3d 172
sclk_pwm_isp 173 Exynos4x12
sclk_spi0_isp 174 Exynos4x12
sclk_spi1_isp 175 Exynos4x12
sclk_uart_isp 176 Exynos4x12
[Peripheral Clock Gates]
Clock ID SoC (if specific)
-----------------------------------------------
fimc0 256
fimc1 257
fimc2 258
fimc3 259
csis0 260
csis1 261
jpeg 262
smmu_fimc0 263
smmu_fimc1 264
smmu_fimc2 265
smmu_fimc3 266
smmu_jpeg 267
vp 268
mixer 269
tvenc 270 Exynos4210
hdmi 271
smmu_tv 272
mfc 273
smmu_mfcl 274
smmu_mfcr 275
g3d 276
g2d 277 Exynos4210
rotator 278 Exynos4210
mdma 279 Exynos4210
smmu_g2d 280 Exynos4210
smmu_rotator 281 Exynos4210
smmu_mdma 282 Exynos4210
fimd0 283
mie0 284
mdnie0 285 Exynos4412
dsim0 286
smmu_fimd0 287
fimd1 288 Exynos4210
mie1 289 Exynos4210
dsim1 290 Exynos4210
smmu_fimd1 291 Exynos4210
pdma0 292
pdma1 293
pcie_phy 294
sata_phy 295 Exynos4210
tsi 296
sdmmc0 297
sdmmc1 298
sdmmc2 299
sdmmc3 300
sdmmc4 301
sata 302 Exynos4210
sromc 303
usb_host 304
usb_device 305
pcie 306
onenand 307
nfcon 308
smmu_pcie 309
gps 310
smmu_gps 311
uart0 312
uart1 313
uart2 314
uart3 315
uart4 316
i2c0 317
i2c1 318
i2c2 319
i2c3 320
i2c4 321
i2c5 322
i2c6 323
i2c7 324
i2c_hdmi 325
tsadc 326
spi0 327
spi1 328
spi2 329
i2s1 330
i2s2 331
pcm0 332
i2s0 333
pcm1 334
pcm2 335
pwm 336
slimbus 337
spdif 338
ac97 339
modemif 340
chipid 341
sysreg 342
hdmi_cec 343
mct 344
wdt 345
rtc 346
keyif 347
audss 348
mipi_hsi 349 Exynos4210
mdma2 350 Exynos4210
pixelasyncm0 351
pixelasyncm1 352
fimc_lite0 353 Exynos4x12
fimc_lite1 354 Exynos4x12
ppmuispx 355 Exynos4x12
ppmuispmx 356 Exynos4x12
fimc_isp 357 Exynos4x12
fimc_drc 358 Exynos4x12
fimc_fd 359 Exynos4x12
mcuisp 360 Exynos4x12
gicisp 361 Exynos4x12
smmu_isp 362 Exynos4x12
smmu_drc 363 Exynos4x12
smmu_fd 364 Exynos4x12
smmu_lite0 365 Exynos4x12
smmu_lite1 366 Exynos4x12
mcuctl_isp 367 Exynos4x12
mpwm_isp 368 Exynos4x12
i2c0_isp 369 Exynos4x12
i2c1_isp 370 Exynos4x12
mtcadc_isp 371 Exynos4x12
pwm_isp 372 Exynos4x12
wdt_isp 373 Exynos4x12
uart_isp 374 Exynos4x12
asyncaxim 375 Exynos4x12
smmu_ispcx 376 Exynos4x12
spi0_isp 377 Exynos4x12
spi1_isp 378 Exynos4x12
pwm_isp_sclk 379 Exynos4x12
spi0_isp_sclk 380 Exynos4x12
spi1_isp_sclk 381 Exynos4x12
uart_isp_sclk 382 Exynos4x12
[Mux Clocks]
Clock ID SoC (if specific)
-----------------------------------------------
mout_fimc0 384
mout_fimc1 385
mout_fimc2 386
mout_fimc3 387
mout_cam0 388
mout_cam1 389
mout_csis0 390
mout_csis1 391
mout_g3d0 392
mout_g3d1 393
mout_g3d 394
aclk400_mcuisp 395 Exynos4x12
[Div Clocks]
Clock ID SoC (if specific)
-----------------------------------------------
div_isp0 450 Exynos4x12
div_isp1 451 Exynos4x12
div_mcuisp0 452 Exynos4x12
div_mcuisp1 453 Exynos4x12
div_aclk200 454 Exynos4x12
div_aclk400_mcuisp 455 Exynos4x12
Example 1: An example of a clock controller node is listed below.
clock: clock-controller@0x10030000 {
compatible = "samsung,exynos4210-clock";
reg = <0x10030000 0x20000>;
#clock-cells = <1>;
};
Example 2: UART controller node that consumes the clock generated by the clock
controller. Refer to the standard clock bindings for information
about 'clocks' and 'clock-names' property.
serial@13820000 {
compatible = "samsung,exynos4210-uart";
reg = <0x13820000 0x100>;
interrupts = <0 54 0>;
clocks = <&clock 314>, <&clock 153>;
clock-names = "uart", "clk_uart_baud0";
};

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* Samsung Exynos5250 Clock Controller
The Exynos5250 clock controller generates and supplies clock to various
controllers within the Exynos5250 SoC.
Required Properties:
- comptible: should be one of the following.
- "samsung,exynos5250-clock" - controller compatible with Exynos5250 SoC.
- reg: physical base address of the controller and length of memory mapped
region.
- #clock-cells: should be 1.
The following is the list of clocks generated by the controller. Each clock is
assigned an identifier and client nodes use this identifier to specify the
clock which they consume.
[Core Clocks]
Clock ID
----------------------------
fin_pll 1
[Clock Gate for Special Clocks]
Clock ID
----------------------------
sclk_cam_bayer 128
sclk_cam0 129
sclk_cam1 130
sclk_gscl_wa 131
sclk_gscl_wb 132
sclk_fimd1 133
sclk_mipi1 134
sclk_dp 135
sclk_hdmi 136
sclk_pixel 137
sclk_audio0 138
sclk_mmc0 139
sclk_mmc1 140
sclk_mmc2 141
sclk_mmc3 142
sclk_sata 143
sclk_usb3 144
sclk_jpeg 145
sclk_uart0 146
sclk_uart1 147
sclk_uart2 148
sclk_uart3 149
sclk_pwm 150
sclk_audio1 151
sclk_audio2 152
sclk_spdif 153
sclk_spi0 154
sclk_spi1 155
sclk_spi2 156
[Peripheral Clock Gates]
Clock ID
----------------------------
gscl0 256
gscl1 257
gscl2 258
gscl3 259
gscl_wa 260
gscl_wb 261
smmu_gscl0 262
smmu_gscl1 263
smmu_gscl2 264
smmu_gscl3 265
mfc 266
smmu_mfcl 267
smmu_mfcr 268
rotator 269
jpeg 270
mdma1 271
smmu_rotator 272
smmu_jpeg 273
smmu_mdma1 274
pdma0 275
pdma1 276
sata 277
usbotg 278
mipi_hsi 279
sdmmc0 280
sdmmc1 281
sdmmc2 282
sdmmc3 283
sromc 284
usb2 285
usb3 286
sata_phyctrl 287
sata_phyi2c 288
uart0 289
uart1 290
uart2 291
uart3 292
uart4 293
i2c0 294
i2c1 295
i2c2 296
i2c3 297
i2c4 298
i2c5 299
i2c6 300
i2c7 301
i2c_hdmi 302
adc 303
spi0 304
spi1 305
spi2 306
i2s1 307
i2s2 308
pcm1 309
pcm2 310
pwm 311
spdif 312
ac97 313
hsi2c0 314
hsi2c1 315
hs12c2 316
hs12c3 317
chipid 318
sysreg 319
pmu 320
cmu_top 321
cmu_core 322
cmu_mem 323
tzpc0 324
tzpc1 325
tzpc2 326
tzpc3 327
tzpc4 328
tzpc5 329
tzpc6 330
tzpc7 331
tzpc8 332
tzpc9 333
hdmi_cec 334
mct 335
wdt 336
rtc 337
tmu 338
fimd1 339
mie1 340
dsim0 341
dp 342
mixer 343
hdmi 345
Example 1: An example of a clock controller node is listed below.
clock: clock-controller@0x10010000 {
compatible = "samsung,exynos5250-clock";
reg = <0x10010000 0x30000>;
#clock-cells = <1>;
};
Example 2: UART controller node that consumes the clock generated by the clock
controller. Refer to the standard clock bindings for information
about 'clocks' and 'clock-names' property.
serial@13820000 {
compatible = "samsung,exynos4210-uart";
reg = <0x13820000 0x100>;
interrupts = <0 54 0>;
clocks = <&clock 314>, <&clock 153>;
clock-names = "uart", "clk_uart_baud0";
};

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* Samsung Exynos5440 Clock Controller
The Exynos5440 clock controller generates and supplies clock to various
controllers within the Exynos5440 SoC.
Required Properties:
- comptible: should be "samsung,exynos5440-clock".
- reg: physical base address of the controller and length of memory mapped
region.
- #clock-cells: should be 1.
The following is the list of clocks generated by the controller. Each clock is
assigned an identifier and client nodes use this identifier to specify the
clock which they consume.
[Core Clocks]
Clock ID
----------------------------
xtal 1
arm_clk 2
[Peripheral Clock Gates]
Clock ID
----------------------------
spi_baud 16
pb0_250 17
pr0_250 18
pr1_250 19
b_250 20
b_125 21
b_200 22
sata 23
usb 24
gmac0 25
cs250 26
pb0_250_o 27
pr0_250_o 28
pr1_250_o 29
b_250_o 30
b_125_o 31
b_200_o 32
sata_o 33
usb_o 34
gmac0_o 35
cs250_o 36
Example: An example of a clock controller node is listed below.
clock: clock-controller@0x10010000 {
compatible = "samsung,exynos5440-clock";
reg = <0x160000 0x10000>;
#clock-cells = <1>;
};

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Binding for simple fixed-rate clock sources.
This binding uses the common clock binding[1].
[1] Documentation/devicetree/bindings/clock/clock-bindings.txt
Required properties:
- compatible : shall be "fixed-clock".
- #clock-cells : from common clock binding; shall be set to 0.
- clock-frequency : frequency of clock in Hz. Should be a single cell.
Optional properties:
- gpios : From common gpio binding; gpio connection to clock enable pin.
- clock-output-names : From common clock binding.
Example:
clock {
compatible = "fixed-clock";
#clock-cells = <0>;
clock-frequency = <1000000000>;
};

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Binding for simple fixed factor rate clock sources.
This binding uses the common clock binding[1].
[1] Documentation/devicetree/bindings/clock/clock-bindings.txt
Required properties:
- compatible : shall be "fixed-factor-clock".
- #clock-cells : from common clock binding; shall be set to 0.
- clock-div: fixed divider.
- clock-mult: fixed multiplier.
- clocks: parent clock.
Optional properties:
- clock-output-names : From common clock binding.
Example:
clock {
compatible = "fixed-factor-clock";
clocks = <&parentclk>;
#clock-cells = <0>;
div = <2>;
mult = <1>;
};

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* Clock bindings for Freescale i.MX23
Required properties:
- compatible: Should be "fsl,imx23-clkctrl"
- reg: Address and length of the register set
- #clock-cells: Should be <1>
The clock consumer should specify the desired clock by having the clock
ID in its "clocks" phandle cell. The following is a full list of i.MX23
clocks and IDs.
Clock ID
------------------
ref_xtal 0
pll 1
ref_cpu 2
ref_emi 3
ref_pix 4
ref_io 5
saif_sel 6
lcdif_sel 7
gpmi_sel 8
ssp_sel 9
emi_sel 10
cpu 11
etm_sel 12
cpu_pll 13
cpu_xtal 14
hbus 15
xbus 16
lcdif_div 17
ssp_div 18
gpmi_div 19
emi_pll 20
emi_xtal 21
etm_div 22
saif_div 23
clk32k_div 24
rtc 25
adc 26
spdif_div 27
clk32k 28
dri 29
pwm 30
filt 31
uart 32
ssp 33
gpmi 34
spdif 35
emi 36
saif 37
lcdif 38
etm 39
usb 40
usb_phy 41
Examples:
clks: clkctrl@80040000 {
compatible = "fsl,imx23-clkctrl";
reg = <0x80040000 0x2000>;
#clock-cells = <1>;
};
auart0: serial@8006c000 {
compatible = "fsl,imx23-auart";
reg = <0x8006c000 0x2000>;
interrupts = <24 25 23>;
clocks = <&clks 32>;
status = "disabled";
};

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* Clock bindings for Freescale i.MX25
Required properties:
- compatible: Should be "fsl,imx25-ccm"
- reg: Address and length of the register set
- interrupts: Should contain CCM interrupt
- #clock-cells: Should be <1>
The clock consumer should specify the desired clock by having the clock
ID in its "clocks" phandle cell. The following is a full list of i.MX25
clocks and IDs.
Clock ID
---------------------------
dummy 0
osc 1
mpll 2
upll 3
mpll_cpu_3_4 4
cpu_sel 5
cpu 6
ahb 7
usb_div 8
ipg 9
per0_sel 10
per1_sel 11
per2_sel 12
per3_sel 13
per4_sel 14
per5_sel 15
per6_sel 16
per7_sel 17
per8_sel 18
per9_sel 19
per10_sel 20
per11_sel 21
per12_sel 22
per13_sel 23
per14_sel 24
per15_sel 25
per0 26
per1 27
per2 28
per3 29
per4 30
per5 31
per6 32
per7 33
per8 34
per9 35
per10 36
per11 37
per12 38
per13 39
per14 40
per15 41
csi_ipg_per 42
epit_ipg_per 43
esai_ipg_per 44
esdhc1_ipg_per 45
esdhc2_ipg_per 46
gpt_ipg_per 47
i2c_ipg_per 48
lcdc_ipg_per 49
nfc_ipg_per 50
owire_ipg_per 51
pwm_ipg_per 52
sim1_ipg_per 53
sim2_ipg_per 54
ssi1_ipg_per 55
ssi2_ipg_per 56
uart_ipg_per 57
ata_ahb 58
reserved 59
csi_ahb 60
emi_ahb 61
esai_ahb 62
esdhc1_ahb 63
esdhc2_ahb 64
fec_ahb 65
lcdc_ahb 66
rtic_ahb 67
sdma_ahb 68
slcdc_ahb 69
usbotg_ahb 70
reserved 71
reserved 72
reserved 73
reserved 74
can1_ipg 75
can2_ipg 76
csi_ipg 77
cspi1_ipg 78
cspi2_ipg 79
cspi3_ipg 80
dryice_ipg 81
ect_ipg 82
epit1_ipg 83
epit2_ipg 84
reserved 85
esdhc1_ipg 86
esdhc2_ipg 87
fec_ipg 88
reserved 89
reserved 90
reserved 91
gpt1_ipg 92
gpt2_ipg 93
gpt3_ipg 94
gpt4_ipg 95
reserved 96
reserved 97
reserved 98
iim_ipg 99
reserved 100
reserved 101
kpp_ipg 102
lcdc_ipg 103
reserved 104
pwm1_ipg 105
pwm2_ipg 106
pwm3_ipg 107
pwm4_ipg 108
rngb_ipg 109
reserved 110
scc_ipg 111
sdma_ipg 112
sim1_ipg 113
sim2_ipg 114
slcdc_ipg 115
spba_ipg 116
ssi1_ipg 117
ssi2_ipg 118
tsc_ipg 119
uart1_ipg 120
uart2_ipg 121
uart3_ipg 122
uart4_ipg 123
uart5_ipg 124
reserved 125
wdt_ipg 126
Examples:
clks: ccm@53f80000 {
compatible = "fsl,imx25-ccm";
reg = <0x53f80000 0x4000>;
interrupts = <31>;
};
uart1: serial@43f90000 {
compatible = "fsl,imx25-uart", "fsl,imx21-uart";
reg = <0x43f90000 0x4000>;
interrupts = <45>;
clocks = <&clks 79>, <&clks 50>;
clock-names = "ipg", "per";
status = "disabled";
};

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* Clock bindings for Freescale i.MX27
Required properties:
- compatible: Should be "fsl,imx27-ccm"
- reg: Address and length of the register set
- interrupts: Should contain CCM interrupt
- #clock-cells: Should be <1>
The clock consumer should specify the desired clock by having the clock
ID in its "clocks" phandle cell. The following is a full list of i.MX27
clocks and IDs.
Clock ID
-----------------------
dummy 0
ckih 1
ckil 2
mpll 3
spll 4
mpll_main2 5
ahb 6
ipg 7
nfc_div 8
per1_div 9
per2_div 10
per3_div 11
per4_div 12
vpu_sel 13
vpu_div 14
usb_div 15
cpu_sel 16
clko_sel 17
cpu_div 18
clko_div 19
ssi1_sel 20
ssi2_sel 21
ssi1_div 22
ssi2_div 23
clko_en 24
ssi2_ipg_gate 25
ssi1_ipg_gate 26
slcdc_ipg_gate 27
sdhc3_ipg_gate 28
sdhc2_ipg_gate 29
sdhc1_ipg_gate 30
scc_ipg_gate 31
sahara_ipg_gate 32
rtc_ipg_gate 33
pwm_ipg_gate 34
owire_ipg_gate 35
lcdc_ipg_gate 36
kpp_ipg_gate 37
iim_ipg_gate 38
i2c2_ipg_gate 39
i2c1_ipg_gate 40
gpt6_ipg_gate 41
gpt5_ipg_gate 42
gpt4_ipg_gate 43
gpt3_ipg_gate 44
gpt2_ipg_gate 45
gpt1_ipg_gate 46
gpio_ipg_gate 47
fec_ipg_gate 48
emma_ipg_gate 49
dma_ipg_gate 50
cspi3_ipg_gate 51
cspi2_ipg_gate 52
cspi1_ipg_gate 53
nfc_baud_gate 54
ssi2_baud_gate 55
ssi1_baud_gate 56
vpu_baud_gate 57
per4_gate 58
per3_gate 59
per2_gate 60
per1_gate 61
usb_ahb_gate 62
slcdc_ahb_gate 63
sahara_ahb_gate 64
lcdc_ahb_gate 65
vpu_ahb_gate 66
fec_ahb_gate 67
emma_ahb_gate 68
emi_ahb_gate 69
dma_ahb_gate 70
csi_ahb_gate 71
brom_ahb_gate 72
ata_ahb_gate 73
wdog_ipg_gate 74
usb_ipg_gate 75
uart6_ipg_gate 76
uart5_ipg_gate 77
uart4_ipg_gate 78
uart3_ipg_gate 79
uart2_ipg_gate 80
uart1_ipg_gate 81
ckih_div1p5 82
fpm 83
mpll_osc_sel 84
mpll_sel 85
Examples:
clks: ccm@10027000{
compatible = "fsl,imx27-ccm";
reg = <0x10027000 0x1000>;
#clock-cells = <1>;
};
uart1: serial@1000a000 {
compatible = "fsl,imx27-uart", "fsl,imx21-uart";
reg = <0x1000a000 0x1000>;
interrupts = <20>;
clocks = <&clks 81>, <&clks 61>;
clock-names = "ipg", "per";
status = "disabled";
};

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* Clock bindings for Freescale i.MX28
Required properties:
- compatible: Should be "fsl,imx28-clkctrl"
- reg: Address and length of the register set
- #clock-cells: Should be <1>
The clock consumer should specify the desired clock by having the clock
ID in its "clocks" phandle cell. The following is a full list of i.MX28
clocks and IDs.
Clock ID
------------------
ref_xtal 0
pll0 1
pll1 2
pll2 3
ref_cpu 4
ref_emi 5
ref_io0 6
ref_io1 7
ref_pix 8
ref_hsadc 9
ref_gpmi 10
saif0_sel 11
saif1_sel 12
gpmi_sel 13
ssp0_sel 14
ssp1_sel 15
ssp2_sel 16
ssp3_sel 17
emi_sel 18
etm_sel 19
lcdif_sel 20
cpu 21
ptp_sel 22
cpu_pll 23
cpu_xtal 24
hbus 25
xbus 26
ssp0_div 27
ssp1_div 28
ssp2_div 29
ssp3_div 30
gpmi_div 31
emi_pll 32
emi_xtal 33
lcdif_div 34
etm_div 35
ptp 36
saif0_div 37
saif1_div 38
clk32k_div 39
rtc 40
lradc 41
spdif_div 42
clk32k 43
pwm 44
uart 45
ssp0 46
ssp1 47
ssp2 48
ssp3 49
gpmi 50
spdif 51
emi 52
saif0 53
saif1 54
lcdif 55
etm 56
fec 57
can0 58
can1 59
usb0 60
usb1 61
usb0_phy 62
usb1_phy 63
enet_out 64
Examples:
clks: clkctrl@80040000 {
compatible = "fsl,imx28-clkctrl";
reg = <0x80040000 0x2000>;
#clock-cells = <1>;
};
auart0: serial@8006a000 {
compatible = "fsl,imx28-auart", "fsl,imx23-auart";
reg = <0x8006a000 0x2000>;
interrupts = <112 70 71>;
clocks = <&clks 45>;
status = "disabled";
};

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* Clock bindings for Freescale i.MX31
Required properties:
- compatible: Should be "fsl,imx31-ccm"
- reg: Address and length of the register set
- interrupts: Should contain CCM interrupt
- #clock-cells: Should be <1>
The clock consumer should specify the desired clock by having the clock
ID in its "clocks" phandle cell. The following is a full list of i.MX31
clocks and IDs.
Clock ID
-----------------------
dummy 0
ckih 1
ckil 2
mpll 3
spll 4
upll 5
mcu_main 6
hsp 7
ahb 8
nfc 9
ipg 10
per_div 11
per 12
csi_sel 13
fir_sel 14
csi_div 15
usb_div_pre 16
usb_div_post 17
fir_div_pre 18
fir_div_post 19
sdhc1_gate 20
sdhc2_gate 21
gpt_gate 22
epit1_gate 23
epit2_gate 24
iim_gate 25
ata_gate 26
sdma_gate 27
cspi3_gate 28
rng_gate 29
uart1_gate 30
uart2_gate 31
ssi1_gate 32
i2c1_gate 33
i2c2_gate 34
i2c3_gate 35
hantro_gate 36
mstick1_gate 37
mstick2_gate 38
csi_gate 39
rtc_gate 40
wdog_gate 41
pwm_gate 42
sim_gate 43
ect_gate 44
usb_gate 45
kpp_gate 46
ipu_gate 47
uart3_gate 48
uart4_gate 49
uart5_gate 50
owire_gate 51
ssi2_gate 52
cspi1_gate 53
cspi2_gate 54
gacc_gate 55
emi_gate 56
rtic_gate 57
firi_gate 58
Examples:
clks: ccm@53f80000{
compatible = "fsl,imx31-ccm";
reg = <0x53f80000 0x4000>;
interrupts = <0 31 0x04 0 53 0x04>;
#clock-cells = <1>;
};
uart1: serial@43f90000 {
compatible = "fsl,imx31-uart", "fsl,imx21-uart";
reg = <0x43f90000 0x4000>;
interrupts = <45>;
clocks = <&clks 10>, <&clks 30>;
clock-names = "ipg", "per";
status = "disabled";
};

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* Clock bindings for Freescale i.MX5
Required properties:
- compatible: Should be "fsl,<soc>-ccm" , where <soc> can be imx51 or imx53
- reg: Address and length of the register set
- interrupts: Should contain CCM interrupt
- #clock-cells: Should be <1>
The clock consumer should specify the desired clock by having the clock
ID in its "clocks" phandle cell. The following is a full list of i.MX5
clocks and IDs.
Clock ID
---------------------------
dummy 0
ckil 1
osc 2
ckih1 3
ckih2 4
ahb 5
ipg 6
axi_a 7
axi_b 8
uart_pred 9
uart_root 10
esdhc_a_pred 11
esdhc_b_pred 12
esdhc_c_s 13
esdhc_d_s 14
emi_sel 15
emi_slow_podf 16
nfc_podf 17
ecspi_pred 18
ecspi_podf 19
usboh3_pred 20
usboh3_podf 21
usb_phy_pred 22
usb_phy_podf 23
cpu_podf 24
di_pred 25
tve_s 27
uart1_ipg_gate 28
uart1_per_gate 29
uart2_ipg_gate 30
uart2_per_gate 31
uart3_ipg_gate 32
uart3_per_gate 33
i2c1_gate 34
i2c2_gate 35
gpt_ipg_gate 36
pwm1_ipg_gate 37
pwm1_hf_gate 38
pwm2_ipg_gate 39
pwm2_hf_gate 40
gpt_hf_gate 41
fec_gate 42
usboh3_per_gate 43
esdhc1_ipg_gate 44
esdhc2_ipg_gate 45
esdhc3_ipg_gate 46
esdhc4_ipg_gate 47
ssi1_ipg_gate 48
ssi2_ipg_gate 49
ssi3_ipg_gate 50
ecspi1_ipg_gate 51
ecspi1_per_gate 52
ecspi2_ipg_gate 53
ecspi2_per_gate 54
cspi_ipg_gate 55
sdma_gate 56
emi_slow_gate 57
ipu_s 58
ipu_gate 59
nfc_gate 60
ipu_di1_gate 61
vpu_s 62
vpu_gate 63
vpu_reference_gate 64
uart4_ipg_gate 65
uart4_per_gate 66
uart5_ipg_gate 67
uart5_per_gate 68
tve_gate 69
tve_pred 70
esdhc1_per_gate 71
esdhc2_per_gate 72
esdhc3_per_gate 73
esdhc4_per_gate 74
usb_phy_gate 75
hsi2c_gate 76
mipi_hsc1_gate 77
mipi_hsc2_gate 78
mipi_esc_gate 79
mipi_hsp_gate 80
ldb_di1_div_3_5 81
ldb_di1_div 82
ldb_di0_div_3_5 83
ldb_di0_div 84
ldb_di1_gate 85
can2_serial_gate 86
can2_ipg_gate 87
i2c3_gate 88
lp_apm 89
periph_apm 90
main_bus 91
ahb_max 92
aips_tz1 93
aips_tz2 94
tmax1 95
tmax2 96
tmax3 97
spba 98
uart_sel 99
esdhc_a_sel 100
esdhc_b_sel 101
esdhc_a_podf 102
esdhc_b_podf 103
ecspi_sel 104
usboh3_sel 105
usb_phy_sel 106
iim_gate 107
usboh3_gate 108
emi_fast_gate 109
ipu_di0_gate 110
gpc_dvfs 111
pll1_sw 112
pll2_sw 113
pll3_sw 114
ipu_di0_sel 115
ipu_di1_sel 116
tve_ext_sel 117
mx51_mipi 118
pll4_sw 119
ldb_di1_sel 120
di_pll4_podf 121
ldb_di0_sel 122
ldb_di0_gate 123
usb_phy1_gate 124
usb_phy2_gate 125
per_lp_apm 126
per_pred1 127
per_pred2 128
per_podf 129
per_root 130
ssi_apm 131
ssi1_root_sel 132
ssi2_root_sel 133
ssi3_root_sel 134
ssi_ext1_sel 135
ssi_ext2_sel 136
ssi_ext1_com_sel 137
ssi_ext2_com_sel 138
ssi1_root_pred 139
ssi1_root_podf 140
ssi2_root_pred 141
ssi2_root_podf 142
ssi_ext1_pred 143
ssi_ext1_podf 144
ssi_ext2_pred 145
ssi_ext2_podf 146
ssi1_root_gate 147
ssi2_root_gate 148
ssi3_root_gate 149
ssi_ext1_gate 150
ssi_ext2_gate 151
epit1_ipg_gate 152
epit1_hf_gate 153
epit2_ipg_gate 154
epit2_hf_gate 155
can_sel 156
can1_serial_gate 157
can1_ipg_gate 158
owire_gate 159
gpu3d_s 160
gpu2d_s 161
gpu3d_gate 162
gpu2d_gate 163
garb_gate 164
cko1_sel 165
cko1_podf 166
cko1 167
cko2_sel 168
cko2_podf 169
cko2 170
srtc_gate 171
pata_gate 172
Examples (for mx53):
clks: ccm@53fd4000{
compatible = "fsl,imx53-ccm";
reg = <0x53fd4000 0x4000>;
interrupts = <0 71 0x04 0 72 0x04>;
#clock-cells = <1>;
};
can1: can@53fc8000 {
compatible = "fsl,imx53-flexcan", "fsl,p1010-flexcan";
reg = <0x53fc8000 0x4000>;
interrupts = <82>;
clocks = <&clks 158>, <&clks 157>;
clock-names = "ipg", "per";
status = "disabled";
};

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* Clock bindings for Freescale i.MX6 Quad
Required properties:
- compatible: Should be "fsl,imx6q-ccm"
- reg: Address and length of the register set
- interrupts: Should contain CCM interrupt
- #clock-cells: Should be <1>
The clock consumer should specify the desired clock by having the clock
ID in its "clocks" phandle cell. The following is a full list of i.MX6Q
clocks and IDs.
Clock ID
---------------------------
dummy 0
ckil 1
ckih 2
osc 3
pll2_pfd0_352m 4
pll2_pfd1_594m 5
pll2_pfd2_396m 6
pll3_pfd0_720m 7
pll3_pfd1_540m 8
pll3_pfd2_508m 9
pll3_pfd3_454m 10
pll2_198m 11
pll3_120m 12
pll3_80m 13
pll3_60m 14
twd 15
step 16
pll1_sw 17
periph_pre 18
periph2_pre 19
periph_clk2_sel 20
periph2_clk2_sel 21
axi_sel 22
esai_sel 23
asrc_sel 24
spdif_sel 25
gpu2d_axi 26
gpu3d_axi 27
gpu2d_core_sel 28
gpu3d_core_sel 29
gpu3d_shader_sel 30
ipu1_sel 31
ipu2_sel 32
ldb_di0_sel 33
ldb_di1_sel 34
ipu1_di0_pre_sel 35
ipu1_di1_pre_sel 36
ipu2_di0_pre_sel 37
ipu2_di1_pre_sel 38
ipu1_di0_sel 39
ipu1_di1_sel 40
ipu2_di0_sel 41
ipu2_di1_sel 42
hsi_tx_sel 43
pcie_axi_sel 44
ssi1_sel 45
ssi2_sel 46
ssi3_sel 47
usdhc1_sel 48
usdhc2_sel 49
usdhc3_sel 50
usdhc4_sel 51
enfc_sel 52
emi_sel 53
emi_slow_sel 54
vdo_axi_sel 55
vpu_axi_sel 56
cko1_sel 57
periph 58
periph2 59
periph_clk2 60
periph2_clk2 61
ipg 62
ipg_per 63
esai_pred 64
esai_podf 65
asrc_pred 66
asrc_podf 67
spdif_pred 68
spdif_podf 69
can_root 70
ecspi_root 71
gpu2d_core_podf 72
gpu3d_core_podf 73
gpu3d_shader 74
ipu1_podf 75
ipu2_podf 76
ldb_di0_podf 77
ldb_di1_podf 78
ipu1_di0_pre 79
ipu1_di1_pre 80
ipu2_di0_pre 81
ipu2_di1_pre 82
hsi_tx_podf 83
ssi1_pred 84
ssi1_podf 85
ssi2_pred 86
ssi2_podf 87
ssi3_pred 88
ssi3_podf 89
uart_serial_podf 90
usdhc1_podf 91
usdhc2_podf 92
usdhc3_podf 93
usdhc4_podf 94
enfc_pred 95
enfc_podf 96
emi_podf 97
emi_slow_podf 98
vpu_axi_podf 99
cko1_podf 100
axi 101
mmdc_ch0_axi_podf 102
mmdc_ch1_axi_podf 103
arm 104
ahb 105
apbh_dma 106
asrc 107
can1_ipg 108
can1_serial 109
can2_ipg 110
can2_serial 111
ecspi1 112
ecspi2 113
ecspi3 114
ecspi4 115
ecspi5 116
enet 117
esai 118
gpt_ipg 119
gpt_ipg_per 120
gpu2d_core 121
gpu3d_core 122
hdmi_iahb 123
hdmi_isfr 124
i2c1 125
i2c2 126
i2c3 127
iim 128
enfc 129
ipu1 130
ipu1_di0 131
ipu1_di1 132
ipu2 133
ipu2_di0 134
ldb_di0 135
ldb_di1 136
ipu2_di1 137
hsi_tx 138
mlb 139
mmdc_ch0_axi 140
mmdc_ch1_axi 141
ocram 142
openvg_axi 143
pcie_axi 144
pwm1 145
pwm2 146
pwm3 147
pwm4 148
per1_bch 149
gpmi_bch_apb 150
gpmi_bch 151
gpmi_io 152
gpmi_apb 153
sata 154
sdma 155
spba 156
ssi1 157
ssi2 158
ssi3 159
uart_ipg 160
uart_serial 161
usboh3 162
usdhc1 163
usdhc2 164
usdhc3 165
usdhc4 166
vdo_axi 167
vpu_axi 168
cko1 169
pll1_sys 170
pll2_bus 171
pll3_usb_otg 172
pll4_audio 173
pll5_video 174
pll8_mlb 175
pll7_usb_host 176
pll6_enet 177
ssi1_ipg 178
ssi2_ipg 179
ssi3_ipg 180
rom 181
usbphy1 182
usbphy2 183
ldb_di0_div_3_5 184
ldb_di1_div_3_5 185
sata_ref 186
sata_ref_100m 187
pcie_ref 188
pcie_ref_125m 189
enet_ref 190
usbphy1_gate 191
usbphy2_gate 192
pll4_post_div 193
pll5_post_div 194
pll5_video_div 195
Examples:
clks: ccm@020c4000 {
compatible = "fsl,imx6q-ccm";
reg = <0x020c4000 0x4000>;
interrupts = <0 87 0x04 0 88 0x04>;
#clock-cells = <1>;
};
uart1: serial@02020000 {
compatible = "fsl,imx6q-uart", "fsl,imx21-uart";
reg = <0x02020000 0x4000>;
interrupts = <0 26 0x04>;
clocks = <&clks 160>, <&clks 161>;
clock-names = "ipg", "per";
status = "disabled";
};

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* Core Clock bindings for Marvell MVEBU SoCs
Marvell MVEBU SoCs usually allow to determine core clock frequencies by
reading the Sample-At-Reset (SAR) register. The core clock consumer should
specify the desired clock by having the clock ID in its "clocks" phandle cell.
The following is a list of provided IDs and clock names on Armada 370/XP:
0 = tclk (Internal Bus clock)
1 = cpuclk (CPU clock)
2 = nbclk (L2 Cache clock)
3 = hclk (DRAM control clock)
4 = dramclk (DDR clock)
The following is a list of provided IDs and clock names on Kirkwood and Dove:
0 = tclk (Internal Bus clock)
1 = cpuclk (CPU0 clock)
2 = l2clk (L2 Cache clock derived from CPU0 clock)
3 = ddrclk (DDR controller clock derived from CPU0 clock)
Required properties:
- compatible : shall be one of the following:
"marvell,armada-370-core-clock" - For Armada 370 SoC core clocks
"marvell,armada-xp-core-clock" - For Armada XP SoC core clocks
"marvell,dove-core-clock" - for Dove SoC core clocks
"marvell,kirkwood-core-clock" - for Kirkwood SoC (except mv88f6180)
"marvell,mv88f6180-core-clock" - for Kirkwood MV88f6180 SoC
- reg : shall be the register address of the Sample-At-Reset (SAR) register
- #clock-cells : from common clock binding; shall be set to 1
Optional properties:
- clock-output-names : from common clock binding; allows overwrite default clock
output names ("tclk", "cpuclk", "l2clk", "ddrclk")
Example:
core_clk: core-clocks@d0214 {
compatible = "marvell,dove-core-clock";
reg = <0xd0214 0x4>;
#clock-cells = <1>;
};
spi0: spi@10600 {
compatible = "marvell,orion-spi";
/* ... */
/* get tclk from core clock provider */
clocks = <&core_clk 0>;
};

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Device Tree Clock bindings for cpu clock of Marvell EBU platforms
Required properties:
- compatible : shall be one of the following:
"marvell,armada-xp-cpu-clock" - cpu clocks for Armada XP
- reg : Address and length of the clock complex register set
- #clock-cells : should be set to 1.
- clocks : shall be the input parent clock phandle for the clock.
cpuclk: clock-complex@d0018700 {
#clock-cells = <1>;
compatible = "marvell,armada-xp-cpu-clock";
reg = <0xd0018700 0xA0>;
clocks = <&coreclk 1>;
}
cpu@0 {
compatible = "marvell,sheeva-v7";
reg = <0>;
clocks = <&cpuclk 0>;
};

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* Gated Clock bindings for Marvell Orion SoCs
Marvell Dove and Kirkwood allow some peripheral clocks to be gated to save
some power. The clock consumer should specify the desired clock by having
the clock ID in its "clocks" phandle cell. The clock ID is directly mapped to
the corresponding clock gating control bit in HW to ease manual clock lookup
in datasheet.
The following is a list of provided IDs for Armada 370:
ID Clock Peripheral
-----------------------------------
0 Audio AC97 Cntrl
1 pex0_en PCIe 0 Clock out
2 pex1_en PCIe 1 Clock out
3 ge1 Gigabit Ethernet 1
4 ge0 Gigabit Ethernet 0
5 pex0 PCIe Cntrl 0
9 pex1 PCIe Cntrl 1
15 sata0 SATA Host 0
17 sdio SDHCI Host
25 tdm Time Division Mplx
28 ddr DDR Cntrl
30 sata1 SATA Host 0
The following is a list of provided IDs for Armada XP:
ID Clock Peripheral
-----------------------------------
0 audio Audio Cntrl
1 ge3 Gigabit Ethernet 3
2 ge2 Gigabit Ethernet 2
3 ge1 Gigabit Ethernet 1
4 ge0 Gigabit Ethernet 0
5 pex0 PCIe Cntrl 0
6 pex1 PCIe Cntrl 1
7 pex2 PCIe Cntrl 2
8 pex3 PCIe Cntrl 3
13 bp
14 sata0lnk
15 sata0 SATA Host 0
16 lcd LCD Cntrl
17 sdio SDHCI Host
18 usb0 USB Host 0
19 usb1 USB Host 1
20 usb2 USB Host 2
22 xor0 XOR DMA 0
23 crypto CESA engine
25 tdm Time Division Mplx
28 xor1 XOR DMA 1
29 sata1lnk
30 sata1 SATA Host 0
The following is a list of provided IDs for Dove:
ID Clock Peripheral
-----------------------------------
0 usb0 USB Host 0
1 usb1 USB Host 1
2 ge Gigabit Ethernet
3 sata SATA Host
4 pex0 PCIe Cntrl 0
5 pex1 PCIe Cntrl 1
8 sdio0 SDHCI Host 0
9 sdio1 SDHCI Host 1
10 nand NAND Cntrl
11 camera Camera Cntrl
12 i2s0 I2S Cntrl 0
13 i2s1 I2S Cntrl 1
15 crypto CESA engine
21 ac97 AC97 Cntrl
22 pdma Peripheral DMA
23 xor0 XOR DMA 0
24 xor1 XOR DMA 1
30 gephy Gigabit Ethernel PHY
Note: gephy(30) is implemented as a parent clock of ge(2)
The following is a list of provided IDs for Kirkwood:
ID Clock Peripheral
-----------------------------------
0 ge0 Gigabit Ethernet 0
2 pex0 PCIe Cntrl 0
3 usb0 USB Host 0
4 sdio SDIO Cntrl
5 tsu Transp. Stream Unit
6 dunit SDRAM Cntrl
7 runit Runit
8 xor0 XOR DMA 0
9 audio I2S Cntrl 0
14 sata0 SATA Host 0
15 sata1 SATA Host 1
16 xor1 XOR DMA 1
17 crypto CESA engine
18 pex1 PCIe Cntrl 1
19 ge1 Gigabit Ethernet 1
20 tdm Time Division Mplx
Required properties:
- compatible : shall be one of the following:
"marvell,dove-gating-clock" - for Dove SoC clock gating
"marvell,kirkwood-gating-clock" - for Kirkwood SoC clock gating
- reg : shall be the register address of the Clock Gating Control register
- #clock-cells : from common clock binding; shall be set to 1
Optional properties:
- clocks : default parent clock phandle (e.g. tclk)
Example:
gate_clk: clock-gating-control@d0038 {
compatible = "marvell,dove-gating-clock";
reg = <0xd0038 0x4>;
/* default parent clock is tclk */
clocks = <&core_clk 0>;
#clock-cells = <1>;
};
sdio0: sdio@92000 {
compatible = "marvell,dove-sdhci";
/* get clk gate bit 8 (sdio0) */
clocks = <&gate_clk 8>;
};

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NVIDIA Tegra114 Clock And Reset Controller
This binding uses the common clock binding:
Documentation/devicetree/bindings/clock/clock-bindings.txt
The CAR (Clock And Reset) Controller on Tegra is the HW module responsible
for muxing and gating Tegra's clocks, and setting their rates.
Required properties :
- compatible : Should be "nvidia,tegra114-car"
- reg : Should contain CAR registers location and length
- clocks : Should contain phandle and clock specifiers for two clocks:
the 32 KHz "32k_in", and the board-specific oscillator "osc".
- #clock-cells : Should be 1.
In clock consumers, this cell represents the clock ID exposed by the
CAR. The assignments may be found in header file
<dt-bindings/clock/tegra114-car.h>.
Example SoC include file:
/ {
tegra_car: clock {
compatible = "nvidia,tegra114-car";
reg = <0x60006000 0x1000>;
#clock-cells = <1>;
};
usb@c5004000 {
clocks = <&tegra_car TEGRA114_CLK_USB2>;
};
};
Example board file:
/ {
clocks {
compatible = "simple-bus";
#address-cells = <1>;
#size-cells = <0>;
osc: clock@0 {
compatible = "fixed-clock";
reg = <0>;
#clock-cells = <0>;
clock-frequency = <12000000>;
};
clk_32k: clock@1 {
compatible = "fixed-clock";
reg = <1>;
#clock-cells = <0>;
clock-frequency = <32768>;
};
};
&tegra_car {
clocks = <&clk_32k> <&osc>;
};
};

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NVIDIA Tegra124 Clock And Reset Controller
This binding uses the common clock binding:
Documentation/devicetree/bindings/clock/clock-bindings.txt
The CAR (Clock And Reset) Controller on Tegra is the HW module responsible
for muxing and gating Tegra's clocks, and setting their rates.
Required properties :
- compatible : Should be "nvidia,tegra124-car"
- reg : Should contain CAR registers location and length
- clocks : Should contain phandle and clock specifiers for two clocks:
the 32 KHz "32k_in", and the board-specific oscillator "osc".
- #clock-cells : Should be 1.
In clock consumers, this cell represents the clock ID exposed by the
CAR. The assignments may be found in header file
<dt-bindings/clock/tegra124-car.h>.
Example SoC include file:
/ {
tegra_car: clock {
compatible = "nvidia,tegra124-car";
reg = <0x60006000 0x1000>;
#clock-cells = <1>;
};
usb@c5004000 {
clocks = <&tegra_car TEGRA124_CLK_USB2>;
};
};
Example board file:
/ {
clocks {
compatible = "simple-bus";
#address-cells = <1>;
#size-cells = <0>;
osc: clock@0 {
compatible = "fixed-clock";
reg = <0>;
#clock-cells = <0>;
clock-frequency = <112400000>;
};
clk_32k: clock@1 {
compatible = "fixed-clock";
reg = <1>;
#clock-cells = <0>;
clock-frequency = <32768>;
};
};
&tegra_car {
clocks = <&clk_32k> <&osc>;
};
};

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DFLL board params node in the board DTS file
Required properties:
- sample-rate : control loop sample rate (in Hz)
- cf : I2C: duration to force the PMIC voltage after frequency change
- cg : loop gain (signed) - determined during board characterization
- ci : loop integral gain selector
- droop-cut-value : control output clock scaler at minimum ring osc freq
- droop-restore-ramp : clock recovery rate after a voltage droop event
- scale-out-ramp : voltage output ramp rate
Optional properties:
- no-output-forcing : don't force PMIC voltage output during request change
- fixed-output-forcing : force PMIC voltage during req change for a fixed time
- auto-output-forcing : force PMIC voltage during req change for a dynamic time
- cg-scale : if present, divide loop gain by 8 (see 'cg' above)
Note that one of 'no-output-forcing', 'fixed-output-forcing', or
'auto-output-forcing' must be specified.
Example:
cpu_dfll_board_params {
sample-rate = <12500>;
fixed-output-forcing;
cf = <10>;
ci = <0>;
cg = <2>;
droop-cut-value = <0xf>;
droop-restore-ramp = <0x0>;
scale-out-ramp = <0x0>;
};

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DFLL CVB table characterization data in the DFLL DTS file
Required properties:
- speedo-id : Note that the properties in this node are applicable for chips
with this Speedo ID set in the chip's fuses. See also
the 'process-id' property below.
- therm-floors : list of two-cell arrays representing the minimum
voltage required on the DFLL voltage rail when the
temperature is at or below the given trip point. The
first of the two cells is the trip point temperature
in degrees Celsius. The second cell is the minimum
voltage in millivolts.
- therm-caps : list of two-cell arrays representing the maximum
voltage limitted on the DFLL voltage rail when the
temperature is at or above the trip point. The first
of the two cells is the trip point temperature in
degrees Celsius. The sencond cell is the maximum voltage
in millivolts.
- cvb-max-millivolts : limit CVB starting voltages to this voltage.
- cvb-speedo-scale : silicon characterization multiplier, from e-fuses
- cvb-voltage-scale : CVB voltage scale factor (to microvolts)
- cvb-voltage-curves : list of four-cell arrays mapping the first cell
(the DFLL target frequency) to three
coefficients (the remaining three cells) used
to compute the starting voltage to program the
PMIC to. The DFLL should automatically adjust
the PMIC voltage below this point.
Optional properties:
- process-id : If present, indicates that the properties in this node only
apply to chips with the matching process ID set in the chip's
fuses. 'speedo-id' must also match the chip fuses.
The address of the characterization nodes is arbitrary and ignored.
Example:
cpu_dfll_cvb_table {
...
characterization@1 {
speedo-id = <1>;
process-id = <0>;
therm-floors = < 20 1000>;
therm-caps = < 62 1230 72 1210 82 1180>;
cvb-max-millivolts = <1350>;
cvb-speedo-scale = <100>;
cvb-voltage-scale = <1000>;
cvb-voltage-curves = < 306000000 2190643 0xfffdd5e5 3576>,
< 408000000 2250968 0xfffdcc35 3576>,
< 510000000 2313333 0xfffdc285 3576>,
< 612000000 2377738 0xfffdb8d5 3576>,
< 714000000 2444183 0xfffdaf25 3576>,
< 816000000 2512669 0xfffda575 3576>,
< 918000000 2583194 0xfffd9bc5 3576>,
<1020000000 2655759 0xfffd9215 3576>,
<1122000000 2730365 0xfffd8865 3576>,
<1224000000 2807010 0xfffd7eb5 3576>,
<1326000000 2885696 0xfffd7505 3576>,
<1428000000 2966422 0xfffd6b55 3576>,
<1530000000 3049183 0xfffd61af 3576>,
<1606500000 3112179 0xfffd5a75 3576>,
<1708500000 3198504 0xfffd50c5 3576>,
<1810500000 3304747 0xfffd444a 3576>;
};
};
...
DFLL CVB table data in the DFLL DTS file
Required properties:
- #address-cells : Set to 1
- #size-cells : Set to 0
Example:
cpu_dfll_cvb_table {
#address-cells = <1>;
#size-cells = <0>;
characterization@1 {
...
};
};

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DFLL PMIC integration node in the board DTS file
Required properties:
- pmic-i2c-interface : selects the I2C interface to communicate with
the PMIC. Future driver changes should add
support for the PWM interface, at which point
this should no longer be mandatory
- pmic-i2c-address : cell containing the PMIC I2C address
- pmic-i2c-voltage-register : cell containing the I2C register address of the
PMIC's set-output-voltage register, for the
rail that supplies the DFLL
- i2c-fs-rate : cell containing the I2C bus rate in Hz, in FS mode
- dfll-min-microvolt : minimum voltage in microvolts that the DFLL will
attempt to program the PMIC to supply
- dfll-max-microvolt : maximum voltage in microvolts that the DFLL will
attempt to program the PMIC to supply
Optional properties:
- i2c-10-bit-addresses : PMIC requires a 10-bit I2C address
- i2c-hs-rate : use high-speed I2C to communicate with the PMIC, at this
rate (in Hz)
- i2c-hs-master-code : I2C master code to use - only applies in HS mode;
i2c-hs-rate must be set
Example:
cpu_dfll_pmic_integration {
pmic-i2c-interface;
pmic-i2c-address = <0x86>;
pmic-i2c-voltage-register = <0x00>;
i2c-fs-rate = <400000>;
dfll-min-microvolt = <600000>;
dfll-max-microvolt = <1400000>;
};

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DFLL silicon tuning characterization data in the DFLL DTS file
Required properties:
- speedo-id : Note that the properties in this node are applicable for chips
with this Speedo ID set in the chip's fuses. See also
the 'process-id' property below.
- tune0-low-voltage-range: value to program into the DFLL_TUNE0
register when the DFLL's voltage rail is in
the low-voltage range. XXX This should be
broken up into the individual DFLL fields -
DT data shouldn't contain a raw register
value.
- tune0-high-voltage-range: value to program into the DFLL_TUNE0
register when the DFLL's voltage rail is in
the high-voltage range. XXX This should be
broken up into the individual DFLL fields -
DT data shouldn't contain a raw register
value.
- tune1 : value to program into the DFLL_TUNE1 register. XXX This
should be broken up into the individual DFLL fields - DT
data shouldn't contain a raw register value.
- droop-rate-min : enable voltage droop control when the DVCO
frequency falls below this rate
- tune-high-min-millivolts : starting voltage of the DFLL's high-voltage range
(in millivolts). The range between min-millivolts
and (tune-high-min-millivolts - 1) is the
low-voltage range.
- min-millivolts : starting voltage of the DFLL's low-voltage range (in
millivolts)
Optional properties:
- process-id : If present, indicates that the properties in this node only
apply to chips with the matching process ID set in the chip's
fuses. 'speedo-id' must also match the chip fuses.
The "address" of the characterization node is arbitrary and ignored.
Example:
cpu_dfll_tuning {
...
characterization@1 {
speedo-id = <1>;
process-id = <0>;
tune0-low-voltage-range = <0x00b0039d>;
tune0-high-voltage-range = <0x00b0009d>;
tune1 = <0x0000001f>;
droop-rate-min = <1000000>;
tune-high-min-millivolts = <1000>;
min-millivolts = <900>;
};
};
...
DFLL silicon tuning data in the DFLL DTS file:
Required properties:
- #address-cells : Set to 1
- #size-cells : Set to 0
The "address" of the characterization node is arbitrary and ignored.
Example:
cpu_dfll_tuning {
#address-cells = <1>;
#size-cells = <0>;
characterization@1 {
...
};
};

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NVIDIA Tegra124 DFLL clocksource data in the SoC DTS file:
Required properties:
- compatible : "nvidia,tegra124-dfll"
- reg : Must contain the starting physical address and length for the
DFLL's MMIO register space, including the DFLL-to-I2C
controller interface and the DFLL's I2C controller.
- clocks : Must contain an array of two-cell arrays, one per clock.
DFLL source clocks. At minimum this should include the
reference clock source and the IP block's main clock
source. Also it should contain the DFLL's I2C controller
clock source. The format is <&clock-provider-phandle
clock-id>.
- clock-names : Must contain an array of strings, one per 'clocks'
two-cell array. The position in the array of these
strings must correspond to the position in the 'clocks'
array (see above). The DFLL driver currently requires
the "soc", "ref", and "i2c" clock names to be populated.
Optional properties:
- status : device availability -- managed by the DT integration code, not
the DFLL driver. Should be set to "disabled" in the SoC
DTS file.
Example:
dfll@70110000 {
compatible = "nvidia,tegra124-dfll";
reg = <0x70110000 0x400>;
clocks = <&tegra_car 265>, <&tegra_car 264>, <&tegra_car 47>;
clock-names = "soc", "ref", "i2c";
status = "disabled";
};
...
NVIDIA Tegra124 DFLL clocksource data in the board DTS file
Required properties:
- vdd-supply : phandle pointing to the DFLL's voltage regulator
- pmic-integration : phandle pointing to the PMIC integration data
for this DFLL instance
- board-params : phandle pointing to the board-specific tuning data
for this DFLL instance
- cvb-table : phandle pointing to the DFLL-specific CVB table for
this DFLL instance
Optional properties:
- i2c-quiet-output-workaround : If the DFLL IP block version
implemented on this SoC requires the
I2C output to the PMIC to be quiesced
before disabling it, this property
should be set.
- status : device availability -- managed by the DT integration code, not
the DFLL driver. Should be set to "okay" if the DFLL is to be
used on this board type.
Example:
dfll@70110000 {
vdd-supply = <&vdd_cpu_reg>;
board-params = <&{/cpu_dfll_board_params}>;
pmic-integration = <&{/cpu_dfll_pmic_integration}>;
status = "okay";
};

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NVIDIA Tegra20 Clock And Reset Controller
This binding uses the common clock binding:
Documentation/devicetree/bindings/clock/clock-bindings.txt
The CAR (Clock And Reset) Controller on Tegra is the HW module responsible
for muxing and gating Tegra's clocks, and setting their rates.
Required properties :
- compatible : Should be "nvidia,tegra20-car"
- reg : Should contain CAR registers location and length
- clocks : Should contain phandle and clock specifiers for two clocks:
the 32 KHz "32k_in", and the board-specific oscillator "osc".
- #clock-cells : Should be 1.
In clock consumers, this cell represents the clock ID exposed by the
CAR. The assignments may be found in header file
<dt-bindings/clock/tegra20-car.h>.
Example SoC include file:
/ {
tegra_car: clock {
compatible = "nvidia,tegra20-car";
reg = <0x60006000 0x1000>;
#clock-cells = <1>;
};
usb@c5004000 {
clocks = <&tegra_car TEGRA20_CLK_USB2>;
};
};
Example board file:
/ {
clocks {
compatible = "simple-bus";
#address-cells = <1>;
#size-cells = <0>;
osc: clock@0 {
compatible = "fixed-clock";
reg = <0>;
#clock-cells = <0>;
clock-frequency = <12000000>;
};
clk_32k: clock@1 {
compatible = "fixed-clock";
reg = <1>;
#clock-cells = <0>;
clock-frequency = <32768>;
};
};
&tegra_car {
clocks = <&clk_32k> <&osc>;
};
};

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NVIDIA Tegra30 Clock And Reset Controller
This binding uses the common clock binding:
Documentation/devicetree/bindings/clock/clock-bindings.txt
The CAR (Clock And Reset) Controller on Tegra is the HW module responsible
for muxing and gating Tegra's clocks, and setting their rates.
Required properties :
- compatible : Should be "nvidia,tegra30-car"
- reg : Should contain CAR registers location and length
- clocks : Should contain phandle and clock specifiers for two clocks:
the 32 KHz "32k_in", and the board-specific oscillator "osc".
- #clock-cells : Should be 1.
In clock consumers, this cell represents the clock ID exposed by the
CAR. The assignments may be found in header file
<dt-bindings/clock/tegra30-car.h>.
Example SoC include file:
/ {
tegra_car: clock {
compatible = "nvidia,tegra30-car";
reg = <0x60006000 0x1000>;
#clock-cells = <1>;
};
usb@c5004000 {
clocks = <&tegra_car TEGRA30_CLK_USB2>;
};
};
Example board file:
/ {
clocks {
compatible = "simple-bus";
#address-cells = <1>;
#size-cells = <0>;
osc: clock@0 {
compatible = "fixed-clock";
reg = <0>;
#clock-cells = <0>;
clock-frequency = <12000000>;
};
clk_32k: clock@1 {
compatible = "fixed-clock";
reg = <1>;
#clock-cells = <0>;
clock-frequency = <32768>;
};
};
&tegra_car {
clocks = <&clk_32k> <&osc>;
};
};

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* Clock bindings for CSR SiRFprimaII
Required properties:
- compatible: Should be "sirf,prima2-clkc"
- reg: Address and length of the register set
- interrupts: Should contain clock controller interrupt
- #clock-cells: Should be <1>
The clock consumer should specify the desired clock by having the clock
ID in its "clocks" phandle cell. The following is a full list of prima2
clocks and IDs.
Clock ID
---------------------------
rtc 0
osc 1
pll1 2
pll2 3
pll3 4
mem 5
sys 6
security 7
dsp 8
gps 9
mf 10
io 11
cpu 12
uart0 13
uart1 14
uart2 15
tsc 16
i2c0 17
i2c1 18
spi0 19
spi1 20
pwmc 21
efuse 22
pulse 23
dmac0 24
dmac1 25
nand 26
audio 27
usp0 28
usp1 29
usp2 30
vip 31
gfx 32
mm 33
lcd 34
vpp 35
mmc01 36
mmc23 37
mmc45 38
usbpll 39
usb0 40
usb1 41
Examples:
clks: clock-controller@88000000 {
compatible = "sirf,prima2-clkc";
reg = <0x88000000 0x1000>;
interrupts = <3>;
#clock-cells = <1>;
};
i2c0: i2c@b00e0000 {
cell-index = <0>;
compatible = "sirf,prima2-i2c";
reg = <0xb00e0000 0x10000>;
interrupts = <24>;
clocks = <&clks 17>;
};

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Binding for Silicon Labs Si5351a/b/c programmable i2c clock generator.
Reference
[1] Si5351A/B/C Data Sheet
http://www.silabs.com/Support%20Documents/TechnicalDocs/Si5351.pdf
The Si5351a/b/c are programmable i2c clock generators with upto 8 output
clocks. Si5351a also has a reduced pin-count package (MSOP10) where only
3 output clocks are accessible. The internal structure of the clock
generators can be found in [1].
==I2C device node==
Required properties:
- compatible: shall be one of "silabs,si5351{a,a-msop,b,c}".
- reg: i2c device address, shall be 0x60 or 0x61.
- #clock-cells: from common clock binding; shall be set to 1.
- clocks: from common clock binding; list of parent clock
handles, shall be xtal reference clock or xtal and clkin for
si5351c only.
- #address-cells: shall be set to 1.
- #size-cells: shall be set to 0.
Optional properties:
- silabs,pll-source: pair of (number, source) for each pll. Allows
to overwrite clock source of pll A (number=0) or B (number=1).
==Child nodes==
Each of the clock outputs can be overwritten individually by
using a child node to the I2C device node. If a child node for a clock
output is not set, the eeprom configuration is not overwritten.
Required child node properties:
- reg: number of clock output.
Optional child node properties:
- silabs,clock-source: source clock of the output divider stage N, shall be
0 = multisynth N
1 = multisynth 0 for output clocks 0-3, else multisynth4
2 = xtal
3 = clkin (si5351c only)
- silabs,drive-strength: output drive strength in mA, shall be one of {2,4,6,8}.
- silabs,multisynth-source: source pll A(0) or B(1) of corresponding multisynth
divider.
- silabs,pll-master: boolean, multisynth can change pll frequency.
==Example==
/* 25MHz reference crystal */
ref25: ref25M {
compatible = "fixed-clock";
#clock-cells = <0>;
clock-frequency = <25000000>;
};
i2c-master-node {
/* Si5351a msop10 i2c clock generator */
si5351a: clock-generator@60 {
compatible = "silabs,si5351a-msop";
reg = <0x60>;
#address-cells = <1>;
#size-cells = <0>;
#clock-cells = <1>;
/* connect xtal input to 25MHz reference */
clocks = <&ref25>;
/* connect xtal input as source of pll0 and pll1 */
silabs,pll-source = <0 0>, <1 0>;
/*
* overwrite clkout0 configuration with:
* - 8mA output drive strength
* - pll0 as clock source of multisynth0
* - multisynth0 as clock source of output divider
* - multisynth0 can change pll0
* - set initial clock frequency of 74.25MHz
*/
clkout0 {
reg = <0>;
silabs,drive-strength = <8>;
silabs,multisynth-source = <0>;
silabs,clock-source = <0>;
silabs,pll-master;
clock-frequency = <74250000>;
};
/*
* overwrite clkout1 configuration with:
* - 4mA output drive strength
* - pll1 as clock source of multisynth1
* - multisynth1 as clock source of output divider
* - multisynth1 can change pll1
*/
clkout1 {
reg = <1>;
silabs,drive-strength = <4>;
silabs,multisynth-source = <1>;
silabs,clock-source = <0>;
pll-master;
};
/*
* overwrite clkout2 configuration with:
* - xtal as clock source of output divider
*/
clkout2 {
reg = <2>;
silabs,clock-source = <2>;
};
};
};

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Device Tree Clock bindings for arch-sunxi
This binding uses the common clock binding[1].
[1] Documentation/devicetree/bindings/clock/clock-bindings.txt
Required properties:
- compatible : shall be one of the following:
"allwinner,sun4i-osc-clk" - for a gatable oscillator
"allwinner,sun4i-pll1-clk" - for the main PLL clock
"allwinner,sun4i-cpu-clk" - for the CPU multiplexer clock
"allwinner,sun4i-axi-clk" - for the AXI clock
"allwinner,sun4i-axi-gates-clk" - for the AXI gates
"allwinner,sun4i-ahb-clk" - for the AHB clock
"allwinner,sun4i-ahb-gates-clk" - for the AHB gates
"allwinner,sun4i-apb0-clk" - for the APB0 clock
"allwinner,sun4i-apb0-gates-clk" - for the APB0 gates
"allwinner,sun4i-apb1-clk" - for the APB1 clock
"allwinner,sun4i-apb1-mux-clk" - for the APB1 clock muxing
"allwinner,sun4i-apb1-gates-clk" - for the APB1 gates
Required properties for all clocks:
- reg : shall be the control register address for the clock.
- clocks : shall be the input parent clock(s) phandle for the clock
- #clock-cells : from common clock binding; shall be set to 0 except for
"allwinner,sun4i-*-gates-clk" where it shall be set to 1
Additionally, "allwinner,sun4i-*-gates-clk" clocks require:
- clock-output-names : the corresponding gate names that the clock controls
For example:
osc24M: osc24M@01c20050 {
#clock-cells = <0>;
compatible = "allwinner,sun4i-osc-clk";
reg = <0x01c20050 0x4>;
clocks = <&osc24M_fixed>;
};
pll1: pll1@01c20000 {
#clock-cells = <0>;
compatible = "allwinner,sun4i-pll1-clk";
reg = <0x01c20000 0x4>;
clocks = <&osc24M>;
};
cpu: cpu@01c20054 {
#clock-cells = <0>;
compatible = "allwinner,sun4i-cpu-clk";
reg = <0x01c20054 0x4>;
clocks = <&osc32k>, <&osc24M>, <&pll1>;
};
Gate clock outputs
The "allwinner,sun4i-*-gates-clk" clocks provide several gatable outputs;
their corresponding offsets as present on sun4i are listed below. Note that
some of these gates are not present on sun5i.
* AXI gates ("allwinner,sun4i-axi-gates-clk")
DRAM 0
* AHB gates ("allwinner,sun4i-ahb-gates-clk")
USB0 0
EHCI0 1
OHCI0 2*
EHCI1 3
OHCI1 4*
SS 5
DMA 6
BIST 7
MMC0 8
MMC1 9
MMC2 10
MMC3 11
MS 12**
NAND 13
SDRAM 14
ACE 16
EMAC 17
TS 18
SPI0 20
SPI1 21
SPI2 22
SPI3 23
PATA 24
SATA 25**
GPS 26*
VE 32
TVD 33
TVE0 34
TVE1 35
LCD0 36
LCD1 37
CSI0 40
CSI1 41
HDMI 43
DE_BE0 44
DE_BE1 45
DE_FE0 46
DE_FE1 47
MP 50
MALI400 52
* APB0 gates ("allwinner,sun4i-apb0-gates-clk")
CODEC 0
SPDIF 1*
AC97 2
IIS 3
PIO 5
IR0 6
IR1 7
KEYPAD 10
* APB1 gates ("allwinner,sun4i-apb1-gates-clk")
I2C0 0
I2C1 1
I2C2 2
CAN 4
SCR 5
PS20 6
PS21 7
UART0 16
UART1 17
UART2 18
UART3 19
UART4 20
UART5 21
UART6 22
UART7 23
Notation:
[*]: The datasheet didn't mention these, but they are present on AW code
[**]: The datasheet had this marked as "NC" but they are used on AW code

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Device Tree Clock bindings for arch-vt8500
This binding uses the common clock binding[1].
[1] Documentation/devicetree/bindings/clock/clock-bindings.txt
Required properties:
- compatible : shall be one of the following:
"via,vt8500-pll-clock" - for a VT8500/WM8505 PLL clock
"wm,wm8650-pll-clock" - for a WM8650 PLL clock
"via,vt8500-device-clock" - for a VT/WM device clock
Required properties for PLL clocks:
- reg : shall be the control register offset from PMC base for the pll clock.
- clocks : shall be the input parent clock phandle for the clock. This should
be the reference clock.
- #clock-cells : from common clock binding; shall be set to 0.
Required properties for device clocks:
- clocks : shall be the input parent clock phandle for the clock. This should
be a pll output.
- #clock-cells : from common clock binding; shall be set to 0.
Device Clocks
Device clocks are required to have one or both of the following sets of
properties:
Gated device clocks:
Required properties:
- enable-reg : shall be the register offset from PMC base for the enable
register.
- enable-bit : shall be the bit within enable-reg to enable/disable the clock.
Divisor device clocks:
Required property:
- divisor-reg : shall be the register offset from PMC base for the divisor
register.
Optional property:
- divisor-mask : shall be the mask for the divisor register. Defaults to 0x1f
if not specified.
For example:
ref25: ref25M {
#clock-cells = <0>;
compatible = "fixed-clock";
clock-frequency = <25000000>;
};
plla: plla {
#clock-cells = <0>;
compatible = "wm,wm8650-pll-clock";
clocks = <&ref25>;
reg = <0x200>;
};
sdhc: sdhc {
#clock-cells = <0>;
compatible = "via,vt8500-device-clock";
clocks = <&pllb>;
divisor-reg = <0x328>;
divisor-mask = <0x3f>;
enable-reg = <0x254>;
enable-bit = <18>;
};

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Device Tree Clock bindings for the Zynq 7000 EPP
The Zynq EPP has several different clk providers, each with there own bindings.
The purpose of this document is to document their usage.
See clock_bindings.txt for more information on the generic clock bindings.
See Chapter 25 of Zynq TRM for more information about Zynq clocks.
== PLLs ==
Used to describe the ARM_PLL, DDR_PLL, and IO_PLL.
Required properties:
- #clock-cells : shall be 0 (only one clock is output from this node)
- compatible : "xlnx,zynq-pll"
- reg : pair of u32 values, which are the address offsets within the SLCR
of the relevant PLL_CTRL register and PLL_CFG register respectively
- clocks : phandle for parent clock. should be the phandle for ps_clk
Optional properties:
- clock-output-names : name of the output clock
Example:
armpll: armpll {
#clock-cells = <0>;
compatible = "xlnx,zynq-pll";
clocks = <&ps_clk>;
reg = <0x100 0x110>;
clock-output-names = "armpll";
};
== Peripheral clocks ==
Describes clock node for the SDIO, SMC, SPI, QSPI, and UART clocks.
Required properties:
- #clock-cells : shall be 1
- compatible : "xlnx,zynq-periph-clock"
- reg : a single u32 value, describing the offset within the SLCR where
the CLK_CTRL register is found for this peripheral
- clocks : phandle for parent clocks. should hold phandles for
the IO_PLL, ARM_PLL, and DDR_PLL in order
- clock-output-names : names of the output clock(s). For peripherals that have
two output clocks (for example, the UART), two clocks
should be listed.
Example:
uart_clk: uart_clk {
#clock-cells = <1>;
compatible = "xlnx,zynq-periph-clock";
clocks = <&iopll &armpll &ddrpll>;
reg = <0x154>;
clock-output-names = "uart0_ref_clk",
"uart1_ref_clk";
};