[U-Boot] [PATCH v4] mx6sabred: Add PFUZE100 PMIC support

[Fabio Estevam <festevam@gmail.com>]

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

mx6sabresd boards have a PFUZE100 PMIC connected to I2C2 bus.

Add support for it

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
---
Changes since v3:
- Rebase against latest u-boot.imx and call 'power_pfuze100_init'
Changes since v2:
- Remove uneeded CONFIG_BOARD_LATE_INI inside mx6sabresd.h as this is already
included in mx6sabre_common.h
Changes since v1:
- Init the PMIC inside board_late_init()

Stefano,

I tried your suggestion of calling the pmic init inside power_init_board(), but
pmic dump command fails, so I am calling the pmic init from board_late_init()
as done on other boards for now.
 board/freescale/mx6sabresd/mx6sabresd.c | 84 +++++++++++++++++++++++++++++++++
 include/configs/mx6sabresd.h            | 12 +++++
 include/power/pfuze100_pmic.h           |  4 ++
 3 files changed, 100 insertions(+)

diff --git a/board/freescale/mx6sabresd/mx6sabresd.c b/board/freescale/mx6sabresd/mx6sabresd.c
index 3e314da..d7c4b4f 100644
--- a/board/freescale/mx6sabresd/mx6sabresd.c
+++ b/board/freescale/mx6sabresd/mx6sabresd.c
@@ -12,6 +12,7 @@
 #include <asm/arch/mx6-pins.h>
 #include <asm/errno.h>
 #include <asm/gpio.h>
+#include <asm/imx-common/mxc_i2c.h>
 #include <asm/imx-common/iomux-v3.h>
 #include <asm/imx-common/boot_mode.h>
 #include <asm/imx-common/video.h>
@@ -23,6 +24,9 @@
 #include <asm/arch/crm_regs.h>
 #include <asm/io.h>
 #include <asm/arch/sys_proto.h>
+#include <i2c.h>
+#include <power/pmic.h>
+#include <power/pfuze100_pmic.h>
 DECLARE_GLOBAL_DATA_PTR;
 
 #define UART_PAD_CTRL  (PAD_CTL_PUS_100K_UP |			\
@@ -39,6 +43,14 @@ DECLARE_GLOBAL_DATA_PTR;
 #define SPI_PAD_CTRL (PAD_CTL_HYS | PAD_CTL_SPEED_MED | \
 		      PAD_CTL_DSE_40ohm | PAD_CTL_SRE_FAST)
 
+#define I2C_PAD_CTRL  (PAD_CTL_PUS_100K_UP |			\
+	PAD_CTL_SPEED_MED | PAD_CTL_DSE_40ohm | PAD_CTL_HYS |	\
+	PAD_CTL_ODE | PAD_CTL_SRE_FAST)
+
+#define I2C_PMIC	1
+
+#define I2C_PAD MUX_PAD_CTRL(I2C_PAD_CTRL)
+
 int dram_init(void)
 {
 	gd->ram_size = get_ram_size((void *)PHYS_SDRAM, PHYS_SDRAM_SIZE);
@@ -129,6 +141,19 @@ iomux_v3_cfg_t const ecspi1_pads[] = {
 	MX6_PAD_KEY_ROW1__GPIO4_IO09 | MUX_PAD_CTRL(NO_PAD_CTRL),
 };
 
+static struct i2c_pads_info i2c_pad_info1 = {
+	.scl = {
+		.i2c_mode = MX6_PAD_KEY_COL3__I2C2_SCL | I2C_PAD,
+		.gpio_mode = MX6_PAD_KEY_COL3__GPIO4_IO12 | I2C_PAD,
+		.gp = IMX_GPIO_NR(4, 12)
+	},
+	.sda = {
+		.i2c_mode = MX6_PAD_KEY_ROW3__I2C2_SDA | I2C_PAD,
+		.gpio_mode = MX6_PAD_KEY_ROW3__GPIO4_IO13 | I2C_PAD,
+		.gp = IMX_GPIO_NR(4, 13)
+	}
+};
+
 static void setup_spi(void)
 {
 	imx_iomux_v3_setup_multiple_pads(ecspi1_pads, ARRAY_SIZE(ecspi1_pads));
@@ -426,6 +451,64 @@ int board_init(void)
 #ifdef CONFIG_MXC_SPI
 	setup_spi();
 #endif
+	setup_i2c(1, CONFIG_SYS_I2C_SPEED, 0x7f, &i2c_pad_info1);
+
+	return 0;
+}
+
+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);
+
+	/* Increase VGEN3 from 2.5 to 2.8V */
+	pmic_reg_read(p, PFUZE100_VGEN3VOL, &reg);
+	reg &= ~0xf;
+	reg |= 0xa;
+	pmic_reg_write(p, PFUZE100_VGEN3VOL, reg);
+
+	/* Increase VGEN5 from 2.8 to 3V */
+	pmic_reg_read(p, PFUZE100_VGEN5VOL, &reg);
+	reg &= ~0xf;
+	reg |= 0xc;
+	pmic_reg_write(p, PFUZE100_VGEN5VOL, reg);
+
+	/* Set SW1AB stanby volage 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);
 
 	return 0;
 }
@@ -446,6 +529,7 @@ int board_late_init(void)
 #ifdef CONFIG_CMD_BMODE
 	add_board_boot_modes(board_boot_modes);
 #endif
+	pfuze_init();
 
 	return 0;
 }
diff --git a/include/configs/mx6sabresd.h b/include/configs/mx6sabresd.h
index 0fa6573..e666ebb 100644
--- a/include/configs/mx6sabresd.h
+++ b/include/configs/mx6sabresd.h
@@ -59,4 +59,16 @@
 #define CONFIG_PCIE_IMX_POWER_GPIO	IMX_GPIO_NR(3, 19)
 #endif
 
+/* 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
+
 #endif                         /* __MX6QSABRESD_CONFIG_H */
diff --git a/include/power/pfuze100_pmic.h b/include/power/pfuze100_pmic.h
index 444aba6..0002f1e 100644
--- a/include/power/pfuze100_pmic.h
+++ b/include/power/pfuze100_pmic.h
@@ -15,7 +15,11 @@ enum {
 	PFUZE100_FABID		= 0x04,
 
 	PFUZE100_SW1ABVOL	= 0x20,
+	PFUZE100_SW1ABSTBY	= 0x21,
+	PUZE_100_SW1ABCONF	= 0x24,
 	PFUZE100_SW1CVOL	= 0x2e,
+	PFUZE100_SW1CSTBY	= 0x2f,
+	PFUZE100_SW1CCONF	= 0x32,
 	PFUZE100_SW2VOL		= 0x35,
 	PFUZE100_SW3AVOL	= 0x3c,
 	PFUZE100_SW3BVOL	= 0x43,
-- 
1.8.3.2