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From:   Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
To:     matthias.bgg@gmail.com, robh+dt@kernel.org
Cc:     devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
        linux-mediatek@lists.infradead.org, linux-kernel@vger.kernel.org,
        adamboardman@gmail.com,
        Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Subject: [PATCH 2/4] arm64: dts: mediatek: Add I2C support for MT6797 SoC
Date:   Sat, 22 Feb 2020 21:54:42 +0530
Message-Id: <20200222162444.11590-3-manivannan.sadhasivam@linaro.org>
In-Reply-To: <20200222162444.11590-1-manivannan.sadhasivam@linaro.org>
References: <20200222162444.11590-1-manivannan.sadhasivam@linaro.org>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

Add I2C support for Mediatek MT6797 SoC. There are a total of 8 I2C
controllers in this SoC (2 being shared) and they are same as the
controllers present in MT6577 SoC. Hence, the driver support is added with
DT fallback method.

As per the datasheet, there are controllers with _imm prefix like i2c2_imm
and i2c3_imm. These appears to be in different memory regions but sharing
the same pins with i2c2 and i2c3 respectively. Since there is no clear
evidence of what they really are, I've adapted the numbering/naming scheme
from the downstream code by Mediatek.

Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
---
 arch/arm64/boot/dts/mediatek/mt6797.dtsi | 220 +++++++++++++++++++++++
 1 file changed, 220 insertions(+)

diff --git a/arch/arm64/boot/dts/mediatek/mt6797.dtsi b/arch/arm64/boot/dts/mediatek/mt6797.dtsi
index 2b2a69c7567f..22f093960d27 100644
--- a/arch/arm64/boot/dts/mediatek/mt6797.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt6797.dtsi
@@ -155,6 +155,62 @@
 					 <MT6797_GPIO233__FUNC_UTXD1>;
 			};
 		};
+
+		i2c0_pins_a: i2c0 {
+			pins0 {
+				pinmux = <MT6797_GPIO37__FUNC_SCL0_0>,
+					 <MT6797_GPIO38__FUNC_SDA0_0>;
+			};
+		};
+
+		i2c1_pins_a: i2c1 {
+			pins1 {
+				pinmux = <MT6797_GPIO55__FUNC_SCL1_0>,
+					 <MT6797_GPIO56__FUNC_SDA1_0>;
+			};
+		};
+
+		i2c2_pins_a: i2c2 {
+			pins2 {
+				pinmux = <MT6797_GPIO96__FUNC_SCL2_0>,
+					 <MT6797_GPIO95__FUNC_SDA2_0>;
+			};
+		};
+
+		i2c3_pins_a: i2c3 {
+			pins3 {
+				pinmux = <MT6797_GPIO75__FUNC_SDA3_0>,
+					 <MT6797_GPIO74__FUNC_SCL3_0>;
+			};
+		};
+
+		i2c4_pins_a: i2c4 {
+			pins4 {
+				pinmux = <MT6797_GPIO238__FUNC_SDA4_0>,
+					 <MT6797_GPIO239__FUNC_SCL4_0>;
+			};
+		};
+
+		i2c5_pins_a: i2c5 {
+			pins5 {
+				pinmux = <MT6797_GPIO240__FUNC_SDA5_0>,
+					 <MT6797_GPIO241__FUNC_SCL5_0>;
+			};
+		};
+
+		i2c6_pins_a: i2c6 {
+			pins6 {
+				pinmux = <MT6797_GPIO152__FUNC_SDA6_0>,
+					 <MT6797_GPIO151__FUNC_SCL6_0>;
+			};
+		};
+
+		i2c7_pins_a: i2c7 {
+			pins7 {
+				pinmux = <MT6797_GPIO154__FUNC_SDA7_0>,
+					 <MT6797_GPIO153__FUNC_SCL7_0>;
+			};
+		};
 	};
 
 	scpsys: scpsys@10006000 {
@@ -233,6 +289,170 @@
 		status = "disabled";
 	};
 
+	i2c0: i2c@11007000 {
+		compatible = "mediatek,mt6797-i2c",
+			     "mediatek,mt6577-i2c";
+		id = <0>;
+		reg = <0 0x11007000 0 0x1000>,
+		      <0 0x11000100 0 0x80>;
+		interrupts = <GIC_SPI 84 IRQ_TYPE_LEVEL_LOW>;
+		clocks = <&infrasys CLK_INFRA_I2C0>,
+			 <&infrasys CLK_INFRA_AP_DMA>;
+		clock-names = "main", "dma";
+		clock-div = <10>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+		status = "disabled";
+	};
+
+	i2c1: i2c@11008000 {
+		compatible = "mediatek,mt6797-i2c",
+			     "mediatek,mt6577-i2c";
+		id = <1>;
+		reg = <0 0x11008000 0 0x1000>,
+		      <0 0x11000180 0 0x80>;
+		interrupts = <GIC_SPI 85 IRQ_TYPE_LEVEL_LOW>;
+		clocks = <&infrasys CLK_INFRA_I2C1>,
+			 <&infrasys CLK_INFRA_AP_DMA>;
+		clock-names = "main", "dma";
+		clock-div = <10>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+		status = "disabled";
+	};
+
+	i2c8: i2c@11009000 {
+		compatible = "mediatek,mt6797-i2c",
+			     "mediatek,mt6577-i2c";
+		id = <8>;
+		reg = <0 0x11009000 0 0x1000>,
+		      <0 0x11000200 0 0x80>;
+		interrupts = <GIC_SPI 86 IRQ_TYPE_LEVEL_LOW>;
+		clocks = <&infrasys CLK_INFRA_I2C2>,
+			 <&infrasys CLK_INFRA_AP_DMA>,
+			 <&infrasys CLK_INFRA_I2C2_ARB>;
+		clock-names = "main", "dma", "arb";
+		clock-div = <10>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+		status = "disabled";
+	};
+
+	i2c9: i2c@1100d000 {
+		compatible = "mediatek,mt6797-i2c",
+			     "mediatek,mt6577-i2c";
+		id = <9>;
+		reg = <0 0x1100d000 0 0x1000>,
+		      <0 0x11000280 0 0x80>;
+		interrupts = <GIC_SPI 87 IRQ_TYPE_LEVEL_LOW>;
+		clocks = <&infrasys CLK_INFRA_I2C3>,
+			 <&infrasys CLK_INFRA_AP_DMA>,
+			 <&infrasys CLK_INFRA_I2C3_ARB>;
+		clock-names = "main", "dma", "arb";
+		clock-div = <10>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+		status = "disabled";
+	};
+
+	i2c6: i2c@1100e000 {
+		compatible = "mediatek,mt6797-i2c",
+			     "mediatek,mt6577-i2c";
+		id = <6>;
+		reg = <0 0x1100e000 0 0x1000>,
+		      <0 0x11000500 0 0x80>;
+		interrupts = <GIC_SPI 88 IRQ_TYPE_LEVEL_LOW>;
+		clocks = <&infrasys CLK_INFRA_I2C_APPM>,
+			 <&infrasys CLK_INFRA_AP_DMA>;
+		clock-names = "main", "dma";
+		clock-div = <10>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+		status = "disabled";
+	};
+
+	i2c7: i2c@11010000 {
+		compatible = "mediatek,mt6797-i2c",
+			     "mediatek,mt6577-i2c";
+		id = <7>;
+		reg = <0 0x11010000 0 0x1000>,
+		      <0 0x11000580 0 0x80>;
+		interrupts = <GIC_SPI 89 IRQ_TYPE_LEVEL_LOW>;
+		clocks = <&infrasys CLK_INFRA_I2C_GPUPM>,
+			 <&infrasys CLK_INFRA_AP_DMA>;
+		clock-names = "main", "dma";
+		clock-div = <10>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+		status = "disabled";
+	};
+
+	i2c4: i2c@11011000 {
+		compatible = "mediatek,mt6797-i2c",
+			     "mediatek,mt6577-i2c";
+		id = <4>;
+		reg = <0 0x11011000 0 0x1000>,
+		      <0 0x11000300 0 0x80>;
+		interrupts = <GIC_SPI 90 IRQ_TYPE_LEVEL_LOW>;
+		clocks = <&infrasys CLK_INFRA_I2C4>,
+			 <&infrasys CLK_INFRA_AP_DMA>;
+		clock-names = "main", "dma";
+		clock-div = <10>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+		status = "disabled";
+	};
+
+	i2c2: i2c@11013000 {
+		compatible = "mediatek,mt6797-i2c",
+			     "mediatek,mt6577-i2c";
+		id = <2>;
+		reg = <0 0x11013000 0 0x1000>,
+		      <0 0x11000400 0 0x80>;
+		interrupts = <GIC_SPI 95 IRQ_TYPE_LEVEL_LOW>;
+		clocks = <&infrasys CLK_INFRA_I2C2_IMM>,
+			 <&infrasys CLK_INFRA_AP_DMA>,
+			 <&infrasys CLK_INFRA_I2C2_ARB>;
+		clock-names = "main", "dma", "arb";
+		clock-div = <10>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+		status = "disabled";
+	};
+
+	i2c3: i2c@11014000 {
+		compatible = "mediatek,mt6797-i2c",
+			     "mediatek,mt6577-i2c";
+		id = <3>;
+		reg = <0 0x11014000 0 0x1000>,
+		      <0 0x11000480 0 0x80>;
+		interrupts = <GIC_SPI 96 IRQ_TYPE_LEVEL_LOW>;
+		clocks = <&infrasys CLK_INFRA_I2C3_IMM>,
+			 <&infrasys CLK_INFRA_AP_DMA>,
+			 <&infrasys CLK_INFRA_I2C3_ARB>;
+		clock-names = "main", "dma", "arb";
+		clock-div = <10>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+		status = "disabled";
+	};
+
+	i2c5: i2c@1101c000 {
+		compatible = "mediatek,mt6797-i2c",
+			     "mediatek,mt6577-i2c";
+		id = <5>;
+		reg = <0 0x1101c000 0 0x1000>,
+		      <0 0x11000380 0 0x80>;
+		interrupts = <GIC_SPI 83 IRQ_TYPE_LEVEL_LOW>;
+		clocks = <&infrasys CLK_INFRA_I2C5>,
+			 <&infrasys CLK_INFRA_AP_DMA>;
+		clock-names = "main", "dma";
+		clock-div = <10>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+		status = "disabled";
+	};
+
 	mmsys: mmsys_config@14000000 {
 		compatible = "mediatek,mt6797-mmsys", "syscon";
 		reg = <0 0x14000000 0 0x1000>;
-- 
2.17.1