[U-Boot] [PATCH 2/2] mx6sxsabresd: Add PFUZE100 PMIC support

[Fabio Estevam <festevam@gmail.com>]

From: Fabio Estevam <fabio.estevam@freescale.com>

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
---
 board/freescale/mx6sxsabresd/mx6sxsabresd.c | 84 +++++++++++++++++++++++++++++
 include/configs/mx6sxsabresd.h              | 13 +++++
 2 files changed, 97 insertions(+)

diff --git a/board/freescale/mx6sxsabresd/mx6sxsabresd.c b/board/freescale/mx6sxsabresd/mx6sxsabresd.c
index ff4c88f..24d6a51 100644
--- a/board/freescale/mx6sxsabresd/mx6sxsabresd.c
+++ b/board/freescale/mx6sxsabresd/mx6sxsabresd.c
@@ -14,10 +14,14 @@
 #include <asm/gpio.h>
 #include <asm/imx-common/iomux-v3.h>
 #include <asm/io.h>
+#include <asm/imx-common/mxc_i2c.h>
 #include <linux/sizes.h>
 #include <common.h>
 #include <fsl_esdhc.h>
 #include <mmc.h>
+#include <i2c.h>
+#include <power/pmic.h>
+#include <power/pfuze100_pmic.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -29,6 +33,11 @@ DECLARE_GLOBAL_DATA_PTR;
 	PAD_CTL_PUS_22K_UP  | PAD_CTL_SPEED_LOW |		\
 	PAD_CTL_DSE_80ohm   | PAD_CTL_SRE_FAST  | PAD_CTL_HYS)
 
+#define I2C_PAD_CTRL    (PAD_CTL_PKE | PAD_CTL_PUE |            \
+	PAD_CTL_PUS_100K_UP | PAD_CTL_SPEED_MED |               \
+	PAD_CTL_DSE_40ohm | PAD_CTL_HYS |			\
+	PAD_CTL_ODE)
+
 int dram_init(void)
 {
 	gd->ram_size = PHYS_SDRAM_SIZE;
@@ -56,9 +65,77 @@ static void setup_iomux_uart(void)
 	imx_iomux_v3_setup_multiple_pads(uart1_pads, ARRAY_SIZE(uart1_pads));
 }
 
+#define PC MUX_PAD_CTRL(I2C_PAD_CTRL)
+/* I2C1 for PMIC */
+struct i2c_pads_info i2c_pad_info1 = {
+	.scl = {
+		.i2c_mode = MX6_PAD_GPIO1_IO00__I2C1_SCL | PC,
+		.gpio_mode = MX6_PAD_GPIO1_IO00__GPIO1_IO_0 | PC,
+		.gp = IMX_GPIO_NR(1, 0),
+	},
+	.sda = {
+		.i2c_mode = MX6_PAD_GPIO1_IO01__I2C1_SDA | PC,
+		.gpio_mode = MX6_PAD_GPIO1_IO01__GPIO1_IO_1 | PC,
+		.gp = IMX_GPIO_NR(1, 1),
+	},
+};
+
+static int pfuze_init(void)
+{
+	struct pmic *p;
+	int ret;
+	unsigned int reg;
+
+	ret = power_pfuze100_init(I2C_PMIC);
+	if (ret)
+		return ret;
+
+	p = pmic_get("PFUZE100_PMIC");
+	ret = pmic_probe(p);
+	if (ret)
+		return ret;
+
+	pmic_reg_read(p, PFUZE100_DEVICEID, &reg);
+	printf("PMIC:  PFUZE100 ID=0x%02x\n", reg);
+
+	/* Set SW1AB standby voltage to 0.975V */
+	pmic_reg_read(p, PFUZE100_SW1ABSTBY, &reg);
+	reg &= ~0x3f;
+	reg |= 0x1b;
+	pmic_reg_write(p, PFUZE100_SW1ABSTBY, reg);
+
+	/* Set SW1AB/VDDARM step ramp up time from 16us to 4us/25mV */
+	pmic_reg_read(p, PUZE_100_SW1ABCONF, &reg);
+	reg &= ~0xc0;
+	reg |= 0x40;
+	pmic_reg_write(p, PUZE_100_SW1ABCONF, reg);
+
+	/* Set SW1C standby voltage to 0.975V */
+	pmic_reg_read(p, PFUZE100_SW1CSTBY, &reg);
+	reg &= ~0x3f;
+	reg |= 0x1b;
+	pmic_reg_write(p, PFUZE100_SW1CSTBY, reg);
+
+	/* Set SW1C/VDDSOC step ramp up time from 16us to 4us/25mV */
+	pmic_reg_read(p, PFUZE100_SW1CCONF, &reg);
+	reg &= ~0xc0;
+	reg |= 0x40;
+	pmic_reg_write(p, PFUZE100_SW1CCONF, reg);
+
+	/* Enable power of VGEN5 3V3, needed for SD3 */
+	pmic_reg_read(p, PFUZE100_VGEN5VOL, &reg);
+	reg &= ~0x1F;
+	reg |= 0x1F;
+	pmic_reg_write(p, PFUZE100_VGEN5VOL, reg);
+
+	return 0;
+}
+
 int board_early_init_f(void)
 {
 	setup_iomux_uart();
+	setup_i2c(1, CONFIG_SYS_I2C_SPEED, 0x7f, &i2c_pad_info1);
+
 	return 0;
 }
 
@@ -87,6 +164,13 @@ int board_init(void)
 	return 0;
 }
 
+int board_late_init(void)
+{
+	pfuze_init();
+
+	return 0;
+}
+
 int checkboard(void)
 {
 	puts("Board: MX6SX SABRE SDB\n");
diff --git a/include/configs/mx6sxsabresd.h b/include/configs/mx6sxsabresd.h
index 390286b..7967b5d 100644
--- a/include/configs/mx6sxsabresd.h
+++ b/include/configs/mx6sxsabresd.h
@@ -28,6 +28,7 @@
 #define CONFIG_SYS_MALLOC_LEN		(3 * SZ_1M)
 
 #define CONFIG_BOARD_EARLY_INIT_F
+#define CONFIG_BOARD_LATE_INIT
 #define CONFIG_MXC_GPIO
 
 #define CONFIG_MXC_UART
@@ -168,6 +169,18 @@
 #define CONFIG_CMD_FAT
 #define CONFIG_DOS_PARTITION
 
+/* I2C Configs */
+#define CONFIG_CMD_I2C
+#define CONFIG_SYS_I2C
+#define CONFIG_SYS_I2C_MXC
+#define CONFIG_SYS_I2C_SPEED		  100000
+
+/* PMIC */
+#define CONFIG_POWER
+#define CONFIG_POWER_I2C
+#define CONFIG_POWER_PFUZE100
+#define CONFIG_POWER_PFUZE100_I2C_ADDR	0x08
+
 /* FLASH and environment organization */
 #define CONFIG_SYS_NO_FLASH
 
-- 
1.8.3.2