This patch adds the document for Freescale FTM PWM driver under
Documentation/devicetree/bindings/pwm/.
Signed-off-by: Xiubo Li <Li.Xiubo@xxxxxxxxxxxxx>
---
.../devicetree/bindings/pwm/pwm-fsl-ftm.txt | 40 ++++++++++++++++++++++
1 file changed, 40 insertions(+)
create mode 100644 Documentation/devicetree/bindings/pwm/pwm-fsl-ftm.txt
diff --git a/Documentation/devicetree/bindings/pwm/pwm-fsl-ftm.txt b/Documentation/devicetree/bindings/pwm/pwm-fsl-ftm.txt
new file mode 100644
index 0000000..b2b5214
--- /dev/null
+++ b/Documentation/devicetree/bindings/pwm/pwm-fsl-ftm.txt
@@ -0,0 +1,40 @@
+Freescale FTM PWM controller
+
+Required properties:
+- compatible: Should be "fsl,vf610-ftm-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.
+- clock-names : Includes the following module clock source entries:
+ "ftm0" (system clock),
+ "ftm0_fix_sel" (fixed frequency clock),
+ "ftm0_ext_sel" (external clock)
+- clocks : Must contain an entry list for entries in clock-names.
+- fsl,pwm-counter-clk: The FTM PWM counter clock source, should be one of the
+ entries in clock-names.
+- fsl,pwm-avaliable-chs: The FTM channels ID list of current board which are
+ available as PWM function.
+- For each channel's pinctrl, the "chN-active" and "chN-idle" states should be
+ implemented at same time.
+
+Example:
+
+pwm0: pwm@40038000 {
+ compatible = "fsl,vf610-ftm-pwm";
+ reg = <0x40038000 0x1000>;
+ #pwm-cells = <3>;
+ clock-names = "ftm0", "ftm0_fix_sel", "ftm0_ext_sel";
+ clocks = <&clks VF610_CLK_FTM0>,
+ <&clks VF610_CLK_FTM0_FIX_SEL>,
+ <&clks VF610_CLK_FTM0_EXT_SEL>;
+ pinctrl-names = "ch0-active", "ch0-idle", "ch1-active", "ch1-idle",
+ ....;
+ pinctrl-0 = <&pinctrl_pwm0_ch0_active>;
+ pinctrl-1 = <&pinctrl_pwm0_ch0_idle>;
+ pinctrl-2 = <&pinctrl_pwm0_ch1_active>;
+ pinctrl-3 = <&pinctrl_pwm0_ch1_idle>;
+ ...
+ fsl,pwm-counter-clk = "ftm0_ext_sel";
+ fsl,pwm-avaliable-chs = <0 3 5 6>;
+ ...
+};
--
1.8.0
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