From d9c6ff8c2524c66801d9e1f9eedfc102a6464498 Mon Sep 17 00:00:00 2001 From: Imre Kaloz Date: Sun, 25 Jan 2015 15:36:47 +0000 Subject: mvebu: gpio based pwm support Signed-off-by: Imre Kaloz SVN-Revision: 44129 --- ...rt1900ac_use_pwm-fan_rather_than_gpio-fan.patch | 28 ++++++++++++++++++++++ 1 file changed, 28 insertions(+) create mode 100644 target/linux/mvebu/patches-3.18/206-mvebu_wrt1900ac_use_pwm-fan_rather_than_gpio-fan.patch (limited to 'target/linux/mvebu/patches-3.18/206-mvebu_wrt1900ac_use_pwm-fan_rather_than_gpio-fan.patch') diff --git a/target/linux/mvebu/patches-3.18/206-mvebu_wrt1900ac_use_pwm-fan_rather_than_gpio-fan.patch b/target/linux/mvebu/patches-3.18/206-mvebu_wrt1900ac_use_pwm-fan_rather_than_gpio-fan.patch new file mode 100644 index 0000000000..8af5eba5b0 --- /dev/null +++ b/target/linux/mvebu/patches-3.18/206-mvebu_wrt1900ac_use_pwm-fan_rather_than_gpio-fan.patch @@ -0,0 +1,28 @@ +The mvebu gpio driver can also perform PWM on some pins. Us the +pwm-fan driver to control the fan of the WRT1900AC, giving us fine +grain control over its speed and hence noise. + +Signed-off-by: Andrew Lunn +--- + arch/arm/boot/dts/armada-xp-wrt1900ac.dts | 8 +++----- + 1 file changed, 3 insertions(+), 5 deletions(-) + +--- a/arch/arm/boot/dts/armada-xp-mamba.dts ++++ b/arch/arm/boot/dts/armada-xp-mamba.dts +@@ -302,13 +302,11 @@ + }; + }; + +- gpio_fan { ++ pwm_fan { + /* SUNON HA4010V4-0000-C99 */ +- compatible = "gpio-fan"; +- gpios = <&gpio0 24 0>; + +- gpio-fan,speed-map = <0 0 +- 4500 1>; ++ compatible = "pwm-fan"; ++ pwms = <&gpio0 24 4000 0>; + }; + + mvsw61xx { -- cgit v1.2.3