mvebu: add support for 4.1 and switch over
[openwrt/openwrt.git] / target / linux / mvebu / patches-4.1 / 206-mvebu_wrt1900ac_use_pwm-fan_rather_than_gpio-fan.patch
diff --git a/target/linux/mvebu/patches-4.1/206-mvebu_wrt1900ac_use_pwm-fan_rather_than_gpio-fan.patch b/target/linux/mvebu/patches-4.1/206-mvebu_wrt1900ac_use_pwm-fan_rather_than_gpio-fan.patch
new file mode 100644 (file)
index 0000000..c0e3567
--- /dev/null
@@ -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 <andrew@lunn.ch>
+---
+ arch/arm/boot/dts/armada-xp-wrt1900ac.dts | 8 +++-----
+ 1 file changed, 3 insertions(+), 5 deletions(-)
+
+--- a/arch/arm/boot/dts/armada-xp-linksys-mamba.dts
++++ b/arch/arm/boot/dts/armada-xp-linksys-mamba.dts
+@@ -412,13 +412,11 @@
+               };
+       };
+-      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>;
+       };
+       dsa@0 {