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pwm: imx-pwm: add explicit compatible strings and required clock properties

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The imx-pwm binding contains language indicating compatible strings to
be used that is not valid for all supported parts e.g. Should be
"fsl,<soc>-pwm". Fix this by enumerating the valid compatible strings
that represent the two versions of this peripheral in use.

The binding is also missing the clocks/clock-names properties so
document these, the two required ipg and per clocks, and add these
properties to the example.

Signed-off-by: Matt Porter <mporter@konsulko.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
This commit is contained in:
Matt Porter 2015-03-09 09:24:21 -04:00 committed by Thierry Reding
parent c517d838eb
commit 67d7bc4870
1 changed files with 11 additions and 1 deletions
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12
Documentation/devicetree/bindings/pwm/imx-pwm.txt
View File

@ -1,10 +1,17 @@
Freescale i.MX PWM controller
Required properties:
- compatible: should be "fsl,<soc>-pwm"
- compatible : should be "fsl,<soc>-pwm" and one of the following
compatible strings:
- "fsl,imx1-pwm" for PWM compatible with the one integrated on i.MX1
- "fsl,imx27-pwm" for PWM compatible with the one integrated on i.MX27
- reg: physical base address and length of the controller's registers
- #pwm-cells: should be 2. See pwm.txt in this directory for a description of
the cells format.
- clocks : Clock specifiers for both ipg and per clocks.
- clock-names : Clock names should include both "ipg" and "per"
See the clock consumer binding,
Documentation/devicetree/bindings/clock/clock-bindings.txt
- interrupts: The interrupt for the pwm controller
Example:
@ -13,5 +20,8 @@ pwm1: pwm@53fb4000 {
#pwm-cells = <2>;
compatible = "fsl,imx53-pwm", "fsl,imx27-pwm";
reg = <0x53fb4000 0x4000>;
clocks = <&clks IMX5_CLK_PWM1_IPG_GATE>,
<&clks IMX5_CLK_PWM1_HF_GATE>;
clock-names = "ipg", "per";
interrupts = <61>;
};