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authorMatt Porter <mporter@konsulko.com>2015-03-09 09:24:21 -0400
committerThierry Reding <thierry.reding@gmail.com>2015-03-11 09:47:50 +0100
commit67d7bc487075a0155a6d6d477f266b5bb370a238 (patch)
tree61c3cdab603e54bad043cc07d0815bdfb84f9ebe /Documentation
parentc517d838eb7d07bbe9507871fab3931deccff539 (diff)
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pwm: imx-pwm: add explicit compatible strings and required clock properties
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>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/devicetree/bindings/pwm/imx-pwm.txt12
1 files changed, 11 insertions, 1 deletions
diff --git a/Documentation/devicetree/bindings/pwm/imx-pwm.txt b/Documentation/devicetree/bindings/pwm/imx-pwm.txt
index b50d7a6d9d7f..e00c2e9f484d 100644
--- a/Documentation/devicetree/bindings/pwm/imx-pwm.txt
+++ b/Documentation/devicetree/bindings/pwm/imx-pwm.txt
@@ -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>;
};