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Commit ebeec0af authored by Laurent Pinchart's avatar Laurent Pinchart Committed by Thierry Reding
Browse files

pwm: Update DT bindings to reference pwm.txt for cells documentation 



The PWM client cells format is documented in the generic pwm.txt
documentation and duplicated in all PWM driver bindings. Remove
duplicate information and reference pwm.txt instead.

Signed-off-by: default avatarLaurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: default avatarStephen Warren <swarren@nvidia.com>
Signed-off-by: default avatarThierry Reding <thierry.reding@gmail.com>
parent 208be769

Documentation/devicetree/bindings/pwm/atmel-tcb-pwm.txt

+3 −5
Original line number Original line Diff line number Diff line
@@ -2,11 +2,9 @@ Atmel TCB PWM controller 




Required properties:

Required properties:

- compatible: should be "atmel,tcb-pwm"

- compatible: should be "atmel,tcb-pwm"

- #pwm-cells: Should be 3.  The first cell specifies the per-chip index

- #pwm-cells: should be 3. See pwm.txt in this directory for a description of

  of the PWM to use, the second cell is the period in nanoseconds and

  the cells format. The only third cell flag supported by this binding is

  bit 0 in the third cell is used to encode the polarity of PWM output.

  PWM_POLARITY_INVERTED.

  Set bit 0 of the third cell in PWM specifier to 1 for inverse polarity &

  set to 0 for normal polarity.

- tc-block: The Timer Counter block to use as a PWM chip.

- tc-block: The Timer Counter block to use as a PWM chip.





Example:

Example:

Documentation/devicetree/bindings/pwm/imx-pwm.txt

+2 −2
Original line number Original line Diff line number Diff line
@@ -3,8 +3,8 @@ Freescale i.MX PWM controller 
Required properties:

Required properties:

- compatible: should be "fsl,<soc>-pwm"

- compatible: should be "fsl,<soc>-pwm"

- reg: physical base address and length of the controller's registers

- reg: physical base address and length of the controller's registers

- #pwm-cells: should be 2.  The first cell specifies the per-chip index

- #pwm-cells: should be 2. See pwm.txt in this directory for a description of

  of the PWM to use and the second cell is the period in nanoseconds.

  the cells format.

- interrupts: The interrupt for the pwm controller

- interrupts: The interrupt for the pwm controller





Example:

Example:

Documentation/devicetree/bindings/pwm/mxs-pwm.txt

+2 −2
Original line number Original line Diff line number Diff line
@@ -3,8 +3,8 @@ Freescale MXS PWM controller 
Required properties:

Required properties:

- compatible: should be "fsl,imx23-pwm"

- compatible: should be "fsl,imx23-pwm"

- reg: physical base address and length of the controller's registers

- reg: physical base address and length of the controller's registers

- #pwm-cells: should be 2.  The first cell specifies the per-chip index

- #pwm-cells: should be 2. See pwm.txt in this directory for a description of

  of the PWM to use and the second cell is the period in nanoseconds.

  the cells format.

- fsl,pwm-number: the number of PWM devices

- fsl,pwm-number: the number of PWM devices





Example:

Example:

Documentation/devicetree/bindings/pwm/nvidia,tegra20-pwm.txt

+2 −3
Original line number Original line Diff line number Diff line
@@ -5,9 +5,8 @@ Required properties: 
  - "nvidia,tegra20-pwm"

  - "nvidia,tegra20-pwm"

  - "nvidia,tegra30-pwm"

  - "nvidia,tegra30-pwm"

- reg: physical base address and length of the controller's registers

- reg: physical base address and length of the controller's registers

- #pwm-cells: On Tegra the number of cells used to specify a PWM is 2. The

- #pwm-cells: should be 2. See pwm.txt in this directory for a description of

  first cell specifies the per-chip index of the PWM to use and the second

  the cells format.

  cell is the period in nanoseconds.





Example:

Example:

Documentation/devicetree/bindings/pwm/nxp,pca9685-pwm.txt

+2 −2
Original line number Original line Diff line number Diff line
@@ -3,8 +3,8 @@ NXP PCA9685 16-channel 12-bit PWM LED controller 




Required properties:

Required properties:

  - compatible: "nxp,pca9685-pwm"

  - compatible: "nxp,pca9685-pwm"

  - #pwm-cells: should be 2. The first cell specifies the per-chip index

  - #pwm-cells: Should be 2. See pwm.txt in this directory for a description of

    of the PWM to use and the second cell is the period in nanoseconds.

    the cells format.

    The index 16 is the ALLCALL channel, that sets all PWM channels at the same

    The index 16 is the ALLCALL channel, that sets all PWM channels at the same

    time.

    time.