4.19-stable review patch. If anyone has any objections, please let me know.
------------------
From: Stefan Wahren <stefan.wah...@i2se.com>
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: sta...@vger.kernel.org
Reported-by: Matthias Lueschner <luesc...@gmail.com>
Link: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=911443
Signed-off-by: Stefan Wahren <stefan.wah...@i2se.com>
Reviewed-by: Eric Anholt <e...@anholt.net>
Signed-off-by: Florian Fainelli <f.faine...@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
arch/arm/boot/dts/bcm2837-rpi-3-b-plus.dts | 2 +-
arch/arm/boot/dts/bcm2837-rpi-3-b.dts | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
--- 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 @@
wifi_pwrseq: wifi-pwrseq {
compatible = "mmc-pwrseq-simple";
- reset-gpios = <&expgpio 1 GPIO_ACTIVE_HIGH>;
+ reset-gpios = <&expgpio 1 GPIO_ACTIVE_LOW>;
};
};
--- a/arch/arm/boot/dts/bcm2837-rpi-3-b.dts
+++ b/arch/arm/boot/dts/bcm2837-rpi-3-b.dts
@@ -26,7 +26,7 @@
wifi_pwrseq: wifi-pwrseq {
compatible = "mmc-pwrseq-simple";
- reset-gpios = <&expgpio 1 GPIO_ACTIVE_HIGH>;
+ reset-gpios = <&expgpio 1 GPIO_ACTIVE_LOW>;
};
};
