From 88e4774efdf6ae4bf43969ad95ce67d0f228b91a Mon Sep 17 00:00:00 2001
From: Vanessa Maegima <vanessa.maegima@nxp.com>
Date: Wed, 13 Jul 2016 14:27:32 -0300
Subject: [PATCH] pico-imx6ul: Add PMIC support

Add PMIC support. Tested by command "pmic PFUZE3000 dump".

Signed-off-by: Vanessa Maegima <vanessa.maegima@nxp.com>
Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com>
---
 board/technexion/pico-imx6ul/pico-imx6ul.c | 70 ++++++++++++++++++++++
 include/configs/pico-imx6ul.h              | 12 ++++
 2 files changed, 82 insertions(+)

diff --git a/board/technexion/pico-imx6ul/pico-imx6ul.c b/board/technexion/pico-imx6ul/pico-imx6ul.c
index b0b8f054c1..5cbf803e7e 100644
--- a/board/technexion/pico-imx6ul/pico-imx6ul.c
+++ b/board/technexion/pico-imx6ul/pico-imx6ul.c
@@ -14,13 +14,18 @@
 #include <asm/arch/sys_proto.h>
 #include <asm/gpio.h>
 #include <asm/imx-common/iomux-v3.h>
+#include <asm/imx-common/mxc_i2c.h>
 #include <asm/io.h>
 #include <common.h>
 #include <miiphy.h>
 #include <netdev.h>
 #include <fsl_esdhc.h>
+#include <i2c.h>
 #include <linux/sizes.h>
 #include <usb.h>
+#include <power/pmic.h>
+#include <power/pfuze3000_pmic.h>
+#include "../../freescale/common/pfuze.h"
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -32,6 +37,11 @@ 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)
+
 #define OTG_ID_PAD_CTRL (PAD_CTL_PKE | PAD_CTL_PUE |		\
 	PAD_CTL_PUS_47K_UP  | PAD_CTL_SPEED_LOW |		\
 	PAD_CTL_DSE_80ohm   | PAD_CTL_SRE_FAST  | PAD_CTL_HYS)
@@ -47,6 +57,23 @@ DECLARE_GLOBAL_DATA_PTR;
 
 #define RMII_PHY_RESET IMX_GPIO_NR(1, 28)
 
+#ifdef CONFIG_SYS_I2C_MXC
+#define PC MUX_PAD_CTRL(I2C_PAD_CTRL)
+/* I2C2 for PMIC */
+struct i2c_pads_info i2c_pad_info1 = {
+	.scl = {
+		.i2c_mode =  MX6_PAD_GPIO1_IO02__I2C1_SCL | PC,
+		.gpio_mode = MX6_PAD_GPIO1_IO02__GPIO1_IO02 | PC,
+		.gp = IMX_GPIO_NR(1, 2),
+	},
+	.sda = {
+		.i2c_mode = MX6_PAD_GPIO1_IO03__I2C1_SDA | PC,
+		.gpio_mode = MX6_PAD_GPIO1_IO03__GPIO1_IO03 | PC,
+		.gp = IMX_GPIO_NR(1, 3),
+	},
+};
+#endif
+
 static iomux_v3_cfg_t const fec_pads[] = {
 	MX6_PAD_ENET1_TX_EN__ENET2_MDC		| MUX_PAD_CTRL(MDIO_PAD_CTRL),
 	MX6_PAD_ENET1_TX_DATA1__ENET2_MDIO	| MUX_PAD_CTRL(MDIO_PAD_CTRL),
@@ -182,6 +209,45 @@ int board_early_init_f(void)
 	return 0;
 }
 
+#ifdef CONFIG_POWER
+#define I2C_PMIC       0
+static struct pmic *pfuze;
+int power_init_board(void)
+{
+	int ret;
+	unsigned int reg, rev_id;
+
+	ret = power_pfuze3000_init(I2C_PMIC);
+	if (ret)
+		return ret;
+
+	pfuze = pmic_get("PFUZE3000");
+	ret = pmic_probe(pfuze);
+	if (ret)
+		return ret;
+
+	pmic_reg_read(pfuze, PFUZE3000_DEVICEID, &reg);
+	pmic_reg_read(pfuze, PFUZE3000_REVID, &rev_id);
+	printf("PMIC: PFUZE3000 DEV_ID=0x%x REV_ID=0x%x\n", reg, rev_id);
+
+	/* disable Low Power Mode during standby mode */
+	pmic_reg_read(pfuze, PFUZE3000_LDOGCTL, &reg);
+	reg |= 0x1;
+	pmic_reg_write(pfuze, PFUZE3000_LDOGCTL, reg);
+
+	/* SW1B step ramp up time from 2us to 4us/25mV */
+	pmic_reg_write(pfuze, PFUZE3000_SW1BCONF, 0x40);
+
+	/* SW1B mode to APS/PFM */
+	pmic_reg_write(pfuze, PFUZE3000_SW1BMODE, 0xc);
+
+	/* SW1B standby voltage set to 0.975V */
+	pmic_reg_write(pfuze, PFUZE3000_SW1BSTBY, 0xb);
+
+	return 0;
+}
+#endif
+
 int board_usb_phy_mode(int port)
 {
 	if (port == 1)
@@ -211,6 +277,10 @@ int board_init(void)
 	/* Address of boot parameters */
 	gd->bd->bi_boot_params = PHYS_SDRAM + 0x100;
 
+	#ifdef CONFIG_SYS_I2C_MXC
+		setup_i2c(0, CONFIG_SYS_I2C_SPEED, 0x7f, &i2c_pad_info1);
+	#endif
+
 	setup_fec();
 	setup_usb();
 
diff --git a/include/configs/pico-imx6ul.h b/include/configs/pico-imx6ul.h
index f9fc263d99..a1e5f01f82 100644
--- a/include/configs/pico-imx6ul.h
+++ b/include/configs/pico-imx6ul.h
@@ -158,6 +158,18 @@
 #define CONFIG_SYS_INIT_SP_ADDR \
 	(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_SP_OFFSET)
 
+/* I2C configs */
+#define CONFIG_SYS_I2C
+#define CONFIG_SYS_I2C_MXC
+#define CONFIG_SYS_I2C_MXC_I2C1
+#define CONFIG_SYS_I2C_SPEED		100000
+
+/* PMIC */
+#define CONFIG_POWER
+#define CONFIG_POWER_I2C
+#define CONFIG_POWER_PFUZE3000
+#define CONFIG_POWER_PFUZE3000_I2C_ADDR	0x08
+
 /* FLASH and environment organization */
 #define CONFIG_SYS_NO_FLASH
 
-- 
2.39.5