From f51a87a9fbd00d4081874dd24271071a1b491daa Mon Sep 17 00:00:00 2001 From: Tomasz Figa Date: Mon, 26 Aug 2013 19:08:56 +0200 Subject: pwm: samsung: Update DT bindings documentation to cover clocks PWM driver consumes at least one and up to three clocks, which need to be specified in device tree when used. This patch updates bindings documentation to add information about clocks. Signed-off-by: Tomasz Figa Signed-off-by: Kyungmin Park Acked-by: Stephen Warren Reviewed-by: Sylwester Nawrocki Signed-off-by: Mike Turquette --- Documentation/devicetree/bindings/pwm/pwm-samsung.txt | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'Documentation/devicetree/bindings/pwm') diff --git a/Documentation/devicetree/bindings/pwm/pwm-samsung.txt b/Documentation/devicetree/bindings/pwm/pwm-samsung.txt index ac67c687a327..39f0ca7008ba 100644 --- a/Documentation/devicetree/bindings/pwm/pwm-samsung.txt +++ b/Documentation/devicetree/bindings/pwm/pwm-samsung.txt @@ -19,6 +19,16 @@ Required properties: - reg: base address and size of register area - interrupts: list of timer interrupts (one interrupt per timer, starting at timer 0) +- clock-names: should contain all following required clock names: + - "timers" - PWM base clock used to generate PWM signals, + and any subset of following optional clock names: + - "pwm-tclk0" - first external PWM clock source, + - "pwm-tclk1" - second external PWM clock source. + Note that not all IP variants allow using all external clock sources. + Refer to SoC documentation to learn which clock source configurations + are available. +- clocks: should contain clock specifiers of all clocks, which input names + have been specified in clock-names property, in same order. - #pwm-cells: number of cells used for PWM specifier - must be 3 the specifier format is as follows: - phandle to PWM controller node @@ -38,6 +48,8 @@ Example: reg = <0x7f006000 0x1000>; interrupt-parent = <&vic0>; interrupts = <23>, <24>, <25>, <27>, <28>; + clocks = <&clock 67>; + clock-names = "timers"; samsung,pwm-outputs = <0>, <1>; #pwm-cells = <3>; } -- cgit