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From:   Tudor Ambarus <tudor.ambarus@linaro.org>
To:     peter.griffin@linaro.org, robh+dt@kernel.org,
        krzysztof.kozlowski+dt@linaro.org, mturquette@baylibre.com,
        sboyd@kernel.org, conor+dt@kernel.org, andi.shyti@kernel.org,
        alim.akhtar@samsung.com, gregkh@linuxfoundation.org,
        jirislaby@kernel.org, catalin.marinas@arm.com, will@kernel.org,
        s.nawrocki@samsung.com, tomasz.figa@gmail.com,
        cw00.choi@samsung.com, arnd@arndb.de, semen.protsenko@linaro.org
Cc:     andre.draszik@linaro.org, saravanak@google.com,
        willmcvicker@google.com, linux-arm-kernel@lists.infradead.org,
        linux-samsung-soc@vger.kernel.org, linux-clk@vger.kernel.org,
        devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-i2c@vger.kernel.org, linux-serial@vger.kernel.org,
        Tudor Ambarus <tudor.ambarus@linaro.org>
Subject: [PATCH 10/13] arm64: dts: exynos: gs101: define USI8 with I2C configuration
Date:   Thu, 14 Dec 2023 10:52:40 +0000
Message-ID: <20231214105243.3707730-11-tudor.ambarus@linaro.org>
In-Reply-To: <20231214105243.3707730-1-tudor.ambarus@linaro.org>
References: <20231214105243.3707730-1-tudor.ambarus@linaro.org>
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USI8 I2C is used to communicate with an eeprom found on the battery
connector. Define USI8 in I2C configuration.

USI8 CONFIG register comes with a 0x0 reset value, meaning that USI8
doesn't have a default protocol (I2C, SPI, UART) at reset. Thus the
selection of the protocol is intentionally left for the board dtsi file.

Signed-off-by: Tudor Ambarus <tudor.ambarus@linaro.org>
---
 arch/arm64/boot/dts/exynos/google/gs101.dtsi | 26 ++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/arch/arm64/boot/dts/exynos/google/gs101.dtsi b/arch/arm64/boot/dts/exynos/google/gs101.dtsi
index ffb7b4d89a8c..4ea1b180cd0a 100644
--- a/arch/arm64/boot/dts/exynos/google/gs101.dtsi
+++ b/arch/arm64/boot/dts/exynos/google/gs101.dtsi
@@ -354,6 +354,32 @@ pinctrl_peric0: pinctrl@10840000 {
 			interrupts = <GIC_SPI 625 IRQ_TYPE_LEVEL_HIGH 0>;
 		};
 
+		usi8: usi@109700c0 {
+			compatible = "google,gs101-usi",
+				     "samsung,exynos850-usi";
+			reg = <0x109700c0 0x20>;
+			ranges;
+			#address-cells = <1>;
+			#size-cells = <1>;
+			clocks = <&cmu_peric0 CLK_DOUT_PERIC0_USI8_USI>,
+				 <&cmu_peric0 CLK_GOUT_PERIC0_CLK_PERIC0_USI8_USI_CLK>;
+			clock-names = "pclk", "ipclk";
+			samsung,sysreg = <&sysreg_peric0 0x101c>;
+			status = "disabled";
+
+			hsi2c_8: i2c@10970000 {
+				compatible = "google,gs101-hsi2c",
+					     "samsung,exynosautov9-hsi2c";
+				reg = <0x10970000 0xc0>;
+				interrupts = <GIC_SPI 642
+					      IRQ_TYPE_LEVEL_HIGH 0>;
+				clocks = <&cmu_peric0 CLK_DOUT_PERIC0_USI8_USI>,
+					 <&cmu_peric0 CLK_GOUT_PERIC0_CLK_PERIC0_USI8_USI_CLK>;
+				clock-names = "hsi2c", "hsi2c_pclk";
+				status = "disabled";
+			};
+		};
+
 		usi_uart: usi@10a000c0 {
 			compatible = "google,gs101-usi",
 				     "samsung,exynos850-usi";
-- 
2.43.0.472.g3155946c3a-goog