[U-Boot] [PATCH 4/5] sun50i: a64: add support for R_I2C controller

[Vagrant Cascadian <vagrant@debian.org>]

From: Vasily Khoruzhick <anarsoul@gmail.com>

Allwinner A64 has a I2C controller, which is in the R_ MMIO zone and has
two groups of pinmuxes on PL bank, so it's called R_I2C.

Add support for this I2C controller and the pinmux which doesn't conflict
with RSB

Signed-off-by: Vasily Khoruzhick <anarsoul@gmail.com>
Signed-off-by: Vagrant Cascadian <vagrant@debian.org>
---

 arch/arm/dts/sun50i-a64.dtsi           | 17 +++++++++++++++++
 arch/arm/include/asm/arch-sunxi/gpio.h |  1 +
 arch/arm/mach-sunxi/Kconfig            |  1 +
 board/sunxi/board.c                    |  6 ++++++
 4 files changed, 25 insertions(+)

diff --git a/arch/arm/dts/sun50i-a64.dtsi b/arch/arm/dts/sun50i-a64.dtsi
index 7a083637c4..80ddcf0af3 100644
--- a/arch/arm/dts/sun50i-a64.dtsi
+++ b/arch/arm/dts/sun50i-a64.dtsi
@@ -627,6 +627,18 @@
 			};
 		};
 
+		r_i2c: i2c at 1f02400 {
+			compatible = "allwinner,sun50i-a64-i2c",
+				     "allwinner,sun6i-a31-i2c";
+			reg = <0x01f02400 0x400>;
+			interrupts = <GIC_SPI 44 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&r_ccu 9>;
+			resets = <&r_ccu 5>;
+			status = "disabled";
+			#address-cells = <1>;
+			#size-cells = <0>;
+		};
+
 		gic: interrupt-controller at 1c81000 {
 			compatible = "arm,gic-400";
 			reg = <0x01c81000 0x1000>,
@@ -679,6 +691,11 @@
 				pins = "PL0", "PL1";
 				function = "s_rsb";
 			};
+
+			r_i2c_pins_a: i2c-a {
+				pins = "PL8", "PL9";
+				function = "s_i2c";
+			};
 		};
 
 		r_rsb: rsb at 1f03400 {
diff --git a/arch/arm/include/asm/arch-sunxi/gpio.h b/arch/arm/include/asm/arch-sunxi/gpio.h
index 6a5eafc3d3..2daf23f6f5 100644
--- a/arch/arm/include/asm/arch-sunxi/gpio.h
+++ b/arch/arm/include/asm/arch-sunxi/gpio.h
@@ -211,6 +211,7 @@ enum sunxi_gpio_number {
 #define SUN8I_H3_GPL_R_TWI	2
 #define SUN8I_A23_GPL_R_TWI	3
 #define SUN8I_GPL_R_UART	2
+#define SUN50I_GPL_R_TWI	2
 
 #define SUN9I_GPN_R_RSB		3
 
diff --git a/arch/arm/mach-sunxi/Kconfig b/arch/arm/mach-sunxi/Kconfig
index ae77ee9e8e..fccef9d706 100644
--- a/arch/arm/mach-sunxi/Kconfig
+++ b/arch/arm/mach-sunxi/Kconfig
@@ -273,6 +273,7 @@ config MACH_SUN50I
 	select DM_I2C
 	select MMC_SUNXI_SUPPORTS_CALIBRATION
 	select PHY_SUN4I_USB
+	select SUN6I_PRCM
 	select SUNXI_DE2
 	select SUNXI_GEN_SUN6I
 	select SUPPORT_SPL
diff --git a/board/sunxi/board.c b/board/sunxi/board.c
index d1d7f9f400..90f8bc0a6e 100644
--- a/board/sunxi/board.c
+++ b/board/sunxi/board.c
@@ -168,10 +168,16 @@ void i2c_init_board(void)
 #endif
 
 #ifdef CONFIG_R_I2C_ENABLE
+#ifdef CONFIG_MACH_SUN50I
+	clock_twi_onoff(5, 1);
+	sunxi_gpio_set_cfgpin(SUNXI_GPL(8), SUN50I_GPL_R_TWI);
+	sunxi_gpio_set_cfgpin(SUNXI_GPL(9), SUN50I_GPL_R_TWI);
+#else
 	clock_twi_onoff(5, 1);
 	sunxi_gpio_set_cfgpin(SUNXI_GPL(0), SUN8I_H3_GPL_R_TWI);
 	sunxi_gpio_set_cfgpin(SUNXI_GPL(1), SUN8I_H3_GPL_R_TWI);
 #endif
+#endif
 }
 
 #if defined(CONFIG_ENV_IS_IN_MMC) && defined(CONFIG_ENV_IS_IN_FAT)
-- 
2.11.0