linux-kernel - [PATCH 2/5] arm64: dts: exynos: gs101: fix usi8 default mode

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Date: Sat, 27 Jan 2024 00:35:51 +0000
From: André Draszik <andre.draszik@...aro.org>
To: peter.griffin@...aro.org,
	robh+dt@...nel.org,
	krzysztof.kozlowski+dt@...aro.org,
	conor+dt@...nel.org
Cc: linux-kernel@...r.kernel.org,
	kernel-team@...roid.com,
	tudor.ambarus@...aro.org,
	willmcvicker@...gle.com,
	semen.protsenko@...aro.org,
	alim.akhtar@...sung.com,
	s.nawrocki@...sung.com,
	tomasz.figa@...il.com,
	cw00.choi@...sung.com,
	mturquette@...libre.com,
	sboyd@...nel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-samsung-soc@...r.kernel.org,
	linux-clk@...r.kernel.org,
	devicetree@...r.kernel.org
Subject: [PATCH 2/5] arm64: dts: exynos: gs101: fix usi8 default mode

While commit 6d44d1a1fb62 ("arm64: dts: exynos: gs101: define USI8 with
I2C configuration") states that the USI8 CONFIG is 0 at reset, the boot
loader has configured it by the time Linux runs and it has a different
value at this stage.

Since we want board DTS files to explicitly select the mode, we should
set it to none here so as to ensure things don't work by accident and
to make it clear that board DTS actually need to set the mode based on
the configuration.

Fixes: 6d44d1a1fb62 ("arm64: dts: exynos: gs101: define USI8 with I2C configuration")
Signed-off-by: André Draszik <andre.draszik@...aro.org>
---
 arch/arm64/boot/dts/exynos/google/gs101.dtsi | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/boot/dts/exynos/google/gs101.dtsi b/arch/arm64/boot/dts/exynos/google/gs101.dtsi
index aaac04df5e65..bc251e565be6 100644
--- a/arch/arm64/boot/dts/exynos/google/gs101.dtsi
+++ b/arch/arm64/boot/dts/exynos/google/gs101.dtsi
@@ -384,6 +384,7 @@ usi8: usi@...700c0 {
 				 <&cmu_peric0 CLK_GOUT_PERIC0_PERIC0_TOP0_IPCLK_7>;
 			clock-names = "pclk", "ipclk";
 			samsung,sysreg = <&sysreg_peric0 0x101c>;
+			samsung,mode = <USI_V2_NONE>;
 			status = "disabled";
 
 			hsi2c_8: i2c@...70000 {
-- 
2.43.0.429.g432eaa2c6b-goog