[PATCH v4] arm64: dts: meson-a1: add I2C nodes

Jian Hu jian.hu at amlogic.com
Wed Jan 8 19:17:56 PST 2020


There are four I2C controllers in A1 series,
Share the same comptible with AXG. Compared to AXG,
Drive strength feature is newly added in A1.

Signed-off-by: Jian Hu <jian.hu at amlogic.com>

---
This patch depends on A1 clock patchset at [0][3]

Changes since v3 at [4]:
-put the i2c pins under periphs_pinctrl
-replace bias-pull-up as bias-disable
-add missing space in i2c pins node

Changes since v2 at [2]:
-remove the dependence the commit description
-remove i2c alias in dtsi
-reorder the i2c nodes
-reorder the i2c pins

Changes since v1 at [1]:
-change reg length to 0x20
-assign i2c bus alias in dts file
-add new feature note compared to AXG in changelog

[0] https://lkml.kernel.org/r/20191206074052.15557-1-jian.hu@amlogic.com
[1] https://lkml.kernel.org/r/20191202111253.94872-1-jian.hu@amlogic.com
[2] https://lkml.kernel.org/r/20191211032802.83309-1-jian.hu@amlogic.com
[3] https://lkml.kernel.org/r/20191206074052.15557-1-jian.hu@amlogic.com
[4] https://lkml.kernel.org/r/20191220091611.36319-1-jian.hu@amlogic.com
---
 arch/arm64/boot/dts/amlogic/meson-a1.dtsi | 140 ++++++++++++++++++++++
 1 file changed, 140 insertions(+)

diff --git a/arch/arm64/boot/dts/amlogic/meson-a1.dtsi b/arch/arm64/boot/dts/amlogic/meson-a1.dtsi
index eab2ecd36aa8..009c8c496b58 100644
--- a/arch/arm64/boot/dts/amlogic/meson-a1.dtsi
+++ b/arch/arm64/boot/dts/amlogic/meson-a1.dtsi
@@ -115,6 +115,116 @@
 				       #gpio-cells = <2>;
 				       gpio-ranges = <&periphs_pinctrl 0 0 62>;
 				};
+
+				i2c0_f9_pins: i2c0-f9 {
+					mux {
+						groups = "i2c0_sck_f9",
+							"i2c0_sda_f10";
+						function = "i2c0";
+						bias-disable;
+						drive-strength-microamp = <3000>;
+					};
+				};
+
+				i2c0_f11_pins: i2c0-f11 {
+					mux {
+						groups = "i2c0_sck_f11",
+							"i2c0_sda_f12";
+						function = "i2c0";
+						bias-disable;
+						drive-strength-microamp = <3000>;
+					};
+				};
+
+				i2c1_a_pins: i2c1-a {
+					mux {
+						groups = "i2c1_sck_a",
+							"i2c1_sda_a";
+						function = "i2c1";
+						bias-disable;
+						drive-strength-microamp = <3000>;
+					};
+				};
+
+				i2c1_x_pins: i2c1-x {
+					mux {
+						groups = "i2c1_sck_x",
+							"i2c1_sda_x";
+						function = "i2c1";
+						bias-disable;
+						drive-strength-microamp = <3000>;
+					};
+				};
+
+				i2c2_a4_pins: i2c2-a4 {
+					mux {
+						groups = "i2c2_sck_a4",
+							"i2c2_sda_a5";
+						function = "i2c2";
+						bias-disable;
+						drive-strength-microamp = <3000>;
+					};
+				};
+
+				i2c2_a8_pins: i2c2-a8 {
+					mux {
+						groups = "i2c2_sck_a8",
+							"i2c2_sda_a9";
+						function = "i2c2";
+						bias-disable;
+						drive-strength-microamp = <3000>;
+					};
+				};
+
+				i2c2_x0_pins: i2c2-x0 {
+					mux {
+						groups = "i2c2_sck_x0",
+							"i2c2_sda_x1";
+						function = "i2c2";
+						bias-disable;
+						drive-strength-microamp = <3000>;
+					};
+				};
+
+				i2c2_x15_pins: i2c2-x15 {
+					mux {
+						groups = "i2c2_sck_x15",
+							"i2c2_sda_x16";
+						function = "i2c2";
+						bias-disable;
+						drive-strength-microamp = <3000>;
+					};
+				};
+
+				i2c3_f_pins: i2c3-f {
+					mux {
+						groups = "i2c3_sck_f",
+							"i2c3_sda_f";
+						function = "i2c3";
+						bias-disable;
+						drive-strength-microamp = <3000>;
+					};
+				};
+
+				i2c3_x_pins: i2c3-x {
+					mux {
+						groups = "i2c3_sck_x",
+							"i2c3_sda_x";
+						function = "i2c3";
+						bias-disable;
+						drive-strength-microamp = <3000>;
+					};
+				};
+			};
+
+			i2c0: i2c at 1400 {
+				compatible = "amlogic,meson-axg-i2c";
+				reg = <0x0 0x1400 0x0 0x20>;
+				interrupts = <GIC_SPI 32 IRQ_TYPE_EDGE_RISING>;
+				#address-cells = <1>;
+				#size-cells = <0>;
+				clocks = <&clkc_periphs CLKID_I2C_M_A>;
+				status = "disabled";
 			};
 
 			uart_AO: serial at 1c00 {
@@ -136,6 +246,36 @@
 				clock-names = "xtal", "pclk", "baud";
 				status = "disabled";
 			};
+
+			i2c1: i2c at 5c00 {
+				compatible = "amlogic,meson-axg-i2c";
+				reg = <0x0 0x5c00 0x0 0x20>;
+				interrupts = <GIC_SPI 68 IRQ_TYPE_EDGE_RISING>;
+				#address-cells = <1>;
+				#size-cells = <0>;
+				clocks = <&clkc_periphs CLKID_I2C_M_B>;
+				status = "disabled";
+			};
+
+			i2c2: i2c at 6800 {
+				compatible = "amlogic,meson-axg-i2c";
+				reg = <0x0 0x6800 0x0 0x20>;
+				interrupts = <GIC_SPI 76 IRQ_TYPE_EDGE_RISING>;
+				#address-cells = <1>;
+				#size-cells = <0>;
+				clocks = <&clkc_periphs CLKID_I2C_M_C>;
+				status = "disabled";
+			};
+
+			i2c3: i2c at 6c00 {
+				compatible = "amlogic,meson-axg-i2c";
+				reg = <0x0 0x6c00 0x0 0x20>;
+				interrupts = <GIC_SPI 78 IRQ_TYPE_EDGE_RISING>;
+				#address-cells = <1>;
+				#size-cells = <0>;
+				clocks = <&clkc_periphs CLKID_I2C_M_D>;
+				status = "disabled";
+			};
 		};
 
 		gic: interrupt-controller at ff901000 {
-- 
2.24.0




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