From 45d85f0872ef92779ea5b51a424845a919a41462 Mon Sep 17 00:00:00 2001
From: Stephen Warren <swarren@nvidia.com>
Date: Fri, 29 Jul 2016 13:15:05 -0600
Subject: 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>

diff --git a/arch/arm/dts/tegra186-p2771-0000-a02.dts b/arch/arm/dts/tegra186-p2771-0000-a02.dts
index 70f4326..5ed3817 100644
--- a/arch/arm/dts/tegra186-p2771-0000-a02.dts
+++ b/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>;
+	};
 };
diff --git a/arch/arm/dts/tegra186-p2771-0000-b00.dts b/arch/arm/dts/tegra186-p2771-0000-b00.dts
index 2384a65..90c99c3 100644
--- a/arch/arm/dts/tegra186-p2771-0000-b00.dts
+++ b/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>;
+	};
 };
diff --git a/arch/arm/dts/tegra186-p2771-0000.dtsi b/arch/arm/dts/tegra186-p2771-0000.dtsi
index 4e2b6fb..d867674 100644
--- a/arch/arm/dts/tegra186-p2771-0000.dtsi
+++ b/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";
+		};
+	};
 };
diff --git a/board/nvidia/p2771-0000/p2771-0000.c b/board/nvidia/p2771-0000/p2771-0000.c
index 4ba8ebc..0c828a2 100644
--- a/board/nvidia/p2771-0000/p2771-0000.c
+++ b/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;
+}
diff --git a/configs/p2771-0000-a02_defconfig b/configs/p2771-0000-a02_defconfig
index 1fe25f5..404f7ac 100644
--- a/configs/p2771-0000-a02_defconfig
+++ b/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
diff --git a/configs/p2771-0000-b00_defconfig b/configs/p2771-0000-b00_defconfig
index 552fb6c..ad35c99 100644
--- a/configs/p2771-0000-b00_defconfig
+++ b/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
-- 
cgit v0.10.2