ARM: dts: bcm2837: Fix polarity of wifi reset GPIOs

commit e25b6783c7b1bb79103d4617336879423f86b05e upstream.

The commit b1b8f45b3130 ("ARM: dts: bcm2837: Add missing GPIOs of Expander")
introduced a wifi power sequence. Unfortunately the polarity of the reset
GPIOs were wrong and broke the wifi support on Raspberry Pi 3 B and
later in 3 B+. This wasn't discovered before since the power sequence
takes only effect in case the relevant MMC driver is compiled as a module.

Fixes: b1b8f45b3130 ("ARM: dts: bcm2837: Add missing GPIOs of Expander")
Cc: stable@vger.kernel.org
Reported-by: Matthias Lueschner <lueschem@gmail.com>
Link: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=911443
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/arch/arm/boot/dts/bcm2837-rpi-3-b-plus.dts b/arch/arm/boot/dts/bcm2837-rpi-3-b-plus.dts
index 4adb85e66be3f975894cb712211478439709f274..93762244be7f469a64d9158b2a904e0b8cde1fdd 100644 (file)
--- a/arch/arm/boot/dts/bcm2837-rpi-3-b-plus.dts
+++ b/arch/arm/boot/dts/bcm2837-rpi-3-b-plus.dts
@@ -31,7 +31,7 @@ pwr {
 
        wifi_pwrseq: wifi-pwrseq {
                compatible = "mmc-pwrseq-simple";
-               reset-gpios = <&expgpio 1 GPIO_ACTIVE_HIGH>;
+               reset-gpios = <&expgpio 1 GPIO_ACTIVE_LOW>;
        };
 };
 

diff --git a/arch/arm/boot/dts/bcm2837-rpi-3-b.dts b/arch/arm/boot/dts/bcm2837-rpi-3-b.dts
index c318bcbc6ba7e327bcf164fd543cd47c04c52d2c..89e6fd547c7572f6bc7d243e5055da4e33dc94a2 100644 (file)
--- a/arch/arm/boot/dts/bcm2837-rpi-3-b.dts
+++ b/arch/arm/boot/dts/bcm2837-rpi-3-b.dts
@@ -26,7 +26,7 @@ act {
 
        wifi_pwrseq: wifi-pwrseq {
                compatible = "mmc-pwrseq-simple";
-               reset-gpios = <&expgpio 1 GPIO_ACTIVE_HIGH>;
+               reset-gpios = <&expgpio 1 GPIO_ACTIVE_LOW>;
        };
 };