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dt-bindings: pwm: Add i.MX TPM PWM binding 

Add i.MX TPM(Low Power Timer/Pulse Width Modulation Module) PWM binding.

Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
This commit is contained in:
Anson Huang 2019-05-09 13:29:19 +00:00 committed by Thierry Reding
parent 1347c94f73
commit 2caf038436
1 changed files with 22 additions and 0 deletions
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Documentation/devicetree/bindings/pwm/imx-tpm-pwm.txt Normal file
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Freescale i.MX TPM PWM controller
Required properties:
- compatible : Should be "fsl,imx7ulp-pwm".
- reg: Physical base address and length of the controller's registers.
- #pwm-cells: Should be 3. See pwm.txt in this directory for a description of the cells format.
- clocks : The clock provided by the SoC to drive the PWM.
- interrupts: The interrupt for the PWM controller.
Note: The TPM counter and period counter are shared between multiple channels, so all channels
should use same period setting.
Example:
tpm4: pwm@40250000 {
compatible = "fsl,imx7ulp-pwm";
reg = <0x40250000 0x1000>;
assigned-clocks = <&pcc2 IMX7ULP_CLK_LPTPM4>;
assigned-clock-parents = <&scg1 IMX7ULP_CLK_SOSC_BUS_CLK>;
clocks = <&pcc2 IMX7ULP_CLK_LPTPM4>;
#pwm-cells = <3>;
};