linux-kernel - [PATCH 4/4] mvebu: wrt1900ac: Use pwm-fan rather than gpio-fan

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Date:   Thu, 16 Mar 2017 07:42:18 +0100
From:   Ralph Sennhauser <ralph.sennhauser@...il.com>
To:     linux-gpio@...r.kernel.org
Cc:     Andrew Lunn <andrew@...n.ch>, Imre Kaloz <kaloz@...nwrt.org>,
        Ralph Sennhauser <ralph.sennhauser@...il.com>,
        Jason Cooper <jason@...edaemon.net>,
        Gregory Clement <gregory.clement@...e-electrons.com>,
        Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Russell King <linux@...linux.org.uk>,
        Thierry Reding <thierry.reding@...il.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Alexandre Courbot <gnurou@...il.com>,
        linux-arm-kernel@...ts.infradead.org (moderated list:ARM/Marvell
        Kirkwood and Armada 370, 375, 38x,...),
        devicetree@...r.kernel.org (open list:OPEN FIRMWARE AND FLATTENED
        DEVICE TREE BINDINGS), linux-kernel@...r.kernel.org (open list),
        linux-pwm@...r.kernel.org (open list:PWM SUBSYSTEM)
Subject: [PATCH 4/4] mvebu: wrt1900ac: Use pwm-fan rather than gpio-fan

From: Andrew Lunn <andrew@...n.ch>

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 finer grained
control over its speed and hence noise.

Signed-off-by: Andrew Lunn <andrew@...n.ch>
URL: https://patchwork.ozlabs.org/patch/427291/
Signed-off-by: Ralph Sennhauser <ralph.sennhauser@...il.com>
---
 arch/arm/boot/dts/armada-xp-linksys-mamba.dts | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/arch/arm/boot/dts/armada-xp-linksys-mamba.dts b/arch/arm/boot/dts/armada-xp-linksys-mamba.dts
index 3744ba3..836b275e 100644
--- a/arch/arm/boot/dts/armada-xp-linksys-mamba.dts
+++ b/arch/arm/boot/dts/armada-xp-linksys-mamba.dts
@@ -293,13 +293,11 @@
 		};
 	};
 
-	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 {
-- 
2.10.2