[U-Boot] [PATCH 3/4] Tegra114: MMC: Add SD bus power-rail init routine

[Tom Warren]

T114 requires SD bus power-rail bringup for the SDIO card on SDMMC3.

Signed-off-by: Tom Warren <twarren at nvidia.com>
---
 board/nvidia/dalmore/dalmore.c |   75 ++++++++++++++++++++++++++++++++++++++++
 1 files changed, 75 insertions(+), 0 deletions(-)

diff --git a/board/nvidia/dalmore/dalmore.c b/board/nvidia/dalmore/dalmore.c
index 7449b5b..43f377b 100644
--- a/board/nvidia/dalmore/dalmore.c
+++ b/board/nvidia/dalmore/dalmore.c
@@ -18,6 +18,11 @@
 #include <asm/arch/pinmux.h>
 #include <asm/arch/gp_padctrl.h>
 #include "pinmux-config-dalmore.h"
+#include <i2c.h>
+
+#define BAT_I2C_ADDRESS		0x48	/* TPS65090 charger */
+#define PMU_I2C_ADDRESS		0x58	/* TPS65913 PMU */
+#define MAX_I2C_RETRY		3
 
 /*
  * Routine: pinmux_init
@@ -37,3 +42,73 @@ void pinmux_init(void)
 	/* Initialize any non-default pad configs (APB_MISC_GP regs) */
 	padgrp_config_table(dalmore_padctrl, ARRAY_SIZE(dalmore_padctrl));
 }
+
+#if defined(CONFIG_TEGRA_MMC)
+/*
+ * Do I2C/PMU writes to bring up SD card bus power
+ *
+ */
+void board_sdmmc_voltage_init(void)
+{
+	uchar reg, data_buffer[1];
+	int i, ret;
+
+	ret = i2c_set_bus_num(0);/* PMU is on bus 0 */
+	if (ret)
+		printf("%s: i2c_set_bus_num returned %d\n", __func__, ret);
+
+	/* TPS65913: LDO9_VOLTAGE = 3.3V */
+	data_buffer[0] = 0x31;
+	reg = 0x61;
+
+	for (i = 0; i < MAX_I2C_RETRY; ++i) {
+		ret = i2c_write(PMU_I2C_ADDRESS, reg, 1, data_buffer, 1);
+		if (ret) {
+			udelay(100);
+			printf("%s: PMU i2c_write %02X<-%02X returned %d\n",
+				__func__, reg, data_buffer[0], ret);
+		}
+	}
+
+	/* TPS65913: LDO9_CTRL = Active */
+	data_buffer[0] = 0x01;
+	reg = 0x60;
+
+	for (i = 0; i < MAX_I2C_RETRY; ++i) {
+		ret = i2c_write(PMU_I2C_ADDRESS, reg, 1, data_buffer, 1);
+		if (ret) {
+			udelay(100);
+			printf("%s: PMU i2c_write %02X<-%02X returned %d\n",
+			 __func__, reg, data_buffer[0], ret);
+		}
+	}
+
+	/* TPS65090: FET6_CTRL = enable output auto discharge, enable FET6 */
+	data_buffer[0] = 0x03;
+	reg = 0x14;
+
+	for (i = 0; i < MAX_I2C_RETRY; ++i) {
+		ret = i2c_write(BAT_I2C_ADDRESS, reg, 1, data_buffer, 1);
+		if (ret) {
+			udelay(100);
+			printf("%s: BAT i2c_write %02X<-%02X returned %d\n",
+				__func__, reg, data_buffer[0], ret);
+		}
+	}
+}
+
+/*
+ * Routine: pin_mux_mmc
+ * Description: setup the MMC muxes, power rails, etc.
+ */
+void pin_mux_mmc(void)
+{
+	/*
+	 * NOTE: We don't do mmc-specific pin muxes here.
+	 * They were done globally in pinmux_init().
+	 */
+
+	/* Bring up the SDIO3 power rail */
+	board_sdmmc_voltage_init();
+}
+#endif /* MMC */
-- 
1.7.0.4