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[arm] Fix reset polarity of the wifi device on Raspberry Pi 3

This commit is contained in:
Uwe Kleine-König 2018-12-18 20:32:51 +01:00
parent d19f7ed1a4
commit 12e23cb061
3 changed files with 55 additions and 0 deletions
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2
debian/changelog vendored
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@ -2,6 +2,8 @@ linux (4.19.9-2) UNRELEASED; urgency=medium
[ Uwe Kleine-König ]
* [arm] Fix probing of 3rd gpio device on Armada 370.
* [arm] Fix reset polarity of the wifi device on Raspberry Pi 3
(Closes: #911443).
[ Ben Hutchings ]
* linux-perf: Fix build-time check for unversioned files

52
debian/patches/bugfix/arm/ARM-dts-bcm2837-Fix-polarity-of-wifi-reset-GPIOs.patch vendored Normal file
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@ -0,0 +1,52 @@
From: Stefan Wahren <stefan.wahren@i2se.com>
Date: Mon, 3 Dec 2018 19:37:08 +0100
Subject: [PATCH] ARM: dts: bcm2837: Fix polarity of wifi reset GPIOs
Origin: v4.20-rc7, https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e25b6783c7b1bb79103d4617336879423f86b05e
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>
---
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(-)
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 4adb85e66be3..93762244be7f 100644
--- 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>;
};
};
diff --git a/arch/arm/boot/dts/bcm2837-rpi-3-b.dts b/arch/arm/boot/dts/bcm2837-rpi-3-b.dts
index c318bcbc6ba7..89e6fd547c75 100644
--- 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>;
};
};
--
2.19.2

1
debian/patches/series vendored
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@ -79,6 +79,7 @@ bugfix/arm64/arm64-acpi-Add-fixup-for-HPE-m400-quirks.patch
bugfix/x86/x86-32-disable-3dnow-in-generic-config.patch
bugfix/x86/x86-mm-Fix-guard-hole-handling.patch
bugfix/arm/gpio-mvebu-only-fail-on-missing-clk-if-pwm-is-actual.patch
bugfix/arm/ARM-dts-bcm2837-Fix-polarity-of-wifi-reset-GPIOs.patch
# Arch features
features/mips/MIPS-increase-MAX-PHYSMEM-BITS-on-Loongson-3-only.patch