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kernel: backport the I2C bus recovery for uDPU 

Backport the I2C bus recovery DT configuration for the uDPU that has
been queued for 5.8.

Signed-off-by: Russell King <linux@armlinux.org.uk>
master
Russell King 2020-05-21 09:57:32 +01:00 committed by Petr Štetiar
parent 714199ec34
commit 6593ea23e5
1 changed files with 60 additions and 0 deletions
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60
target/linux/mvebu/patches-5.4/551-v5.8-arm64-dts-add-uDPU-i2c-bus-recovery.patch Normal file
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@ -0,0 +1,60 @@
From: Russell King <rmk+kernel@armlinux.org.uk>
Bcc: linux@mail.armlinux.org.uk
Cc: Vladimir Vid <vladimir.vid@sartura.hr>,Jason Cooper <jason@lakedaemon.net>,Andrew Lunn <andrew@lunn.ch>,Gregory Clement <gregory.clement@bootlin.com>,Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>,Rob Herring <robh+dt@kernel.org>,Mark Rutland <mark.rutland@arm.com>,linux-arm-kernel@lists.infradead.org,devicetree@vger.kernel.org
Subject: [PATCH] arm64: dts: add uDPU i2c bus recovery
MIME-Version: 1.0
Content-Disposition: inline
Content-Transfer-Encoding: 8bit
Content-Type: text/plain; charset="utf-8"
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
---
.../boot/dts/marvell/armada-3720-uDPU.dts | 22 +++++++++++++++++--
1 file changed, 20 insertions(+), 2 deletions(-)
diff --git a/arch/arm64/boot/dts/marvell/armada-3720-uDPU.dts b/arch/arm64/boot/dts/marvell/armada-3720-uDPU.dts
index 7eb6c1796cef..95d46e8d081c 100644
--- a/arch/arm64/boot/dts/marvell/armada-3720-uDPU.dts
+++ b/arch/arm64/boot/dts/marvell/armada-3720-uDPU.dts
@@ -117,18 +117,36 @@
};
};
+&pinctrl_nb {
+ i2c1_recovery_pins: i2c1-recovery-pins {
+ groups = "i2c1";
+ function = "gpio";
+ };
+
+ i2c2_recovery_pins: i2c2-recovery-pins {
+ groups = "i2c2";
+ function = "gpio";
+ };
+};
+
&i2c0 {
status = "okay";
- pinctrl-names = "default";
+ pinctrl-names = "default", "recovery";
pinctrl-0 = <&i2c1_pins>;
+ pinctrl-1 = <&i2c1_recovery_pins>;
/delete-property/mrvl,i2c-fast-mode;
+ scl-gpios = <&gpionb 0 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
+ sda-gpios = <&gpionb 1 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
};
&i2c1 {
status = "okay";
- pinctrl-names = "default";
+ pinctrl-names = "default", "recovery";
pinctrl-0 = <&i2c2_pins>;
+ pinctrl-1 = <&i2c2_recovery_pins>;
/delete-property/mrvl,i2c-fast-mode;
+ scl-gpios = <&gpionb 2 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
+ sda-gpios = <&gpionb 3 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
lm75@48 {
status = "okay";
--
2.20.1