ARM: tegra: enable SD card on p2771-0000

Now that clock and reset drivers exist for Tegra186, we can enable the SD
card controller. Now that a BPMP I2C driver exists for Tegra186, we can
communicate with the PMIC to enable power to the SD card. Hook up the DT
content and board code required to make the SD card work.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Tom Warren <twarren@nvidia.com>

arch/arm/dts/tegra186-p2771-0000-a02.dts

@@ -5,4 +5,9 @@
 / {
 	model = "NVIDIA P2771-0000 A02";
 	compatible = "nvidia,p2771-0000-a02", "nvidia,p2771-0000", "nvidia,tegra186";
+
+	sdhci@3400000 {
+		cd-gpios = <&gpio_main TEGRA_MAIN_GPIO(P, 6) GPIO_ACTIVE_LOW>;
+		power-gpios = <&gpio_main TEGRA_MAIN_GPIO(P, 5) GPIO_ACTIVE_HIGH>;
+	};
 };

arch/arm/dts/tegra186-p2771-0000-b00.dts

@@ -5,4 +5,9 @@
 / {
 	model = "NVIDIA P2771-0000 B00";
 	compatible = "nvidia,p2771-0000-b00", "nvidia,p2771-0000", "nvidia,tegra186";
+
+	sdhci@3400000 {
+		cd-gpios = <&gpio_main TEGRA_MAIN_GPIO(P, 5) GPIO_ACTIVE_LOW>;
+		power-gpios = <&gpio_main TEGRA_MAIN_GPIO(P, 6) GPIO_ACTIVE_HIGH>;
+	};
 };

arch/arm/dts/tegra186-p2771-0000.dtsi

@@ -10,6 +10,8 @@
 
 	aliases {
 		sdhci0 = "/sdhci@3460000";
+		sdhci1 = "/sdhci@3400000";
+		i2c0 = "/bpmp/i2c";
 		i2c1 = "/i2c@3160000";
 		i2c2 = "/i2c@c240000";
 		i2c3 = "/i2c@3180000";
@@ -39,6 +41,12 @@
 		status = "okay";
 	};
 
+	sdhci@3400000 {
+		status = "okay";
+		wp-gpios = <&gpio_main TEGRA_MAIN_GPIO(P, 4) GPIO_ACTIVE_HIGH>;
+		bus-width = <4>;
+	};
+
 	sdhci@3460000 {
 		status = "okay";
 		bus-width = <8>;
@@ -55,4 +63,10 @@
 	i2c@31e0000 {
 		status = "okay";
 	};
+
+	bpmp {
+		i2c {
+			status = "okay";
+		};
+	};
 };

board/nvidia/p2771-0000/p2771-0000.c

@@ -5,3 +5,29 @@
  */
 
 #include <common.h>
+#include <i2c.h>
+#include "../p2571/max77620_init.h"
+
+int tegra_board_init(void)
+{
+	struct udevice *dev;
+	uchar val;
+	int ret;
+
+	/* Turn on MAX77620 LDO3 to 3.3V for SD card power */
+	debug("%s: Set LDO3 for VDDIO_SDMMC_AP power to 3.3V\n", __func__);
+	ret = i2c_get_chip_for_busnum(0, MAX77620_I2C_ADDR_7BIT, 1, &dev);
+	if (ret) {
+		printf("%s: Cannot find MAX77620 I2C chip\n", __func__);
+		return ret;
+	}
+	/* 0xF2 for 3.3v, enabled: bit7:6 = 11 = enable, bit5:0 = voltage */
+	val = 0xF2;
+	ret = dm_i2c_write(dev, MAX77620_CNFG1_L3_REG, &val, 1);
+	if (ret) {
+		printf("i2c_write 0 0x3c 0x27 failed: %d\n", ret);
+		return ret;
+	}
+
+	return 0;
+}

configs/p2771-0000-a02_defconfig

@@ -26,6 +26,7 @@ CONFIG_CMD_EXT4=y
 CONFIG_CMD_EXT4_WRITE=y
 CONFIG_CMD_FAT=y
 CONFIG_CMD_FS_GENERIC=y
+CONFIG_TEGRA186_BPMP_I2C=y
 CONFIG_SYS_NS16550=y
 CONFIG_USB=y
 CONFIG_DM_USB=y

configs/p2771-0000-b00_defconfig

@@ -26,6 +26,7 @@ CONFIG_CMD_EXT4=y
 CONFIG_CMD_EXT4_WRITE=y
 CONFIG_CMD_FAT=y
 CONFIG_CMD_FS_GENERIC=y
+CONFIG_TEGRA186_BPMP_I2C=y
 CONFIG_SYS_NS16550=y
 CONFIG_USB=y
 CONFIG_DM_USB=y