target/linux/bcm27xx/patches-4.19/950-0596-overlays-Correct-gpio-fan-gpio-flags-for-4.19.patch

   1 From 21e4c9306bd20ab4e02f90cd452d90bc4e4a0a98 Mon Sep 17 00:00:00 2001
   2 From: Phil Elwell <phil@raspberrypi.org>
   3 Date: Wed, 3 Jul 2019 20:37:14 +0100
   4 Subject: [PATCH] overlays: Correct gpio-fan gpio flags for 4.19
   5
   6 The gpio-fan overlay was submitted for the 4.14 kernel where the second
   7 value in the Device Tree gpios declaration was ignored (thanks to an
   8 old-style driver), allowing the fan-control output to be active-high
   9 even though the declaration appears to request it be active-low.
  10 The gpio-fan driver in 4.19 uses GPIO descriptors and honours the
  11 active-low flag that the overlay (accidentally?) supplies.
  12
  13 Change/correct the flags field to mark the GPIO as active-high.
  14
  15 Signed-off-by: Phil Elwell <phil@raspberrypi.org>
  16 ---
  17  arch/arm/boot/dts/overlays/gpio-fan-overlay.dts | 2 +-
  18  1 file changed, 1 insertion(+), 1 deletion(-)
  19
  20 --- a/arch/arm/boot/dts/overlays/gpio-fan-overlay.dts
  21 +++ b/arch/arm/boot/dts/overlays/gpio-fan-overlay.dts
  22 @@ -45,7 +45,7 @@
  23                 __overlay__ {
  24                         fan0: gpio-fan@0 {
  25                                 compatible = "gpio-fan";
  26 -                               gpios = <&gpio 12 1>;
  27 +                               gpios = <&gpio 12 0>;
  28                                 gpio-fan,speed-map = <0    0>,
  29                                                                          <5000 1>;
  30                                 #cooling-cells = <2>;