From: Barry Song <[email protected]> this patch adds dt-binding document for pwm-sirf. here the controller clock can't generate PWM signals, so we need seperate clock as signal source.
Signed-off-by: Barry Song <[email protected]> --- Documentation/devicetree/bindings/pwm/pwm-sirf.txt | 23 ++++++++++++++++++++ 1 files changed, 23 insertions(+), 0 deletions(-) create mode 100644 Documentation/devicetree/bindings/pwm/pwm-sirf.txt diff --git a/Documentation/devicetree/bindings/pwm/pwm-sirf.txt b/Documentation/devicetree/bindings/pwm/pwm-sirf.txt new file mode 100644 index 0000000..47851ea --- /dev/null +++ b/Documentation/devicetree/bindings/pwm/pwm-sirf.txt @@ -0,0 +1,23 @@ +SiRF prima2 & atlas6 PWM drivers + +Required properties: +- compatible: "sirf,prima2-pwm" +- reg: physical base address and length of the controller's registers +- #pwm-cells: should be 2. The first cell specifies the per-chip index of the + PWM to use and the second cell is the period in nanoseconds. +- clocks: from common clock binding: the 1st clock is for PWM controller the + other clocks are the sources to generate PWM signals +- clock-names : The first one is the name of the clock for PWM, others are names + of clock sources to generate PWM signal, e.g.sigsrc0 ~sigsrc4. For prima2 and + atlas6, sigsrc0 is OSC with 26MHz, sigsrc3 is RTC with 32KHz, others are PLLs. + Generally, PWM module uses the OSC as clock source to generate PWM signals. + + +Example: +pwm: pwm@b0130000 { + compatible = "sirf,prima2-pwm"; + #pwm-cells = <2>; + reg = <0xb0130000 0x10000>; + clocks = <&clks 21>, <&clks 1>; + clock-names = "pwmc", "sigsrc0""; +}; -- 1.7.5.4 -- To unsubscribe from this list: send the line "unsubscribe linux-pwm" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
