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

[Stefano Babic <sbabic@denx.de>]

Hi Fabio,

just a minor question:

On 04/05/2014 21:14, Fabio Estevam wrote:
> 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>
> ---
>  board/freescale/mx6sabresd/mx6sabresd.c | 83 +++++++++++++++++++++++++++++++++
>  include/configs/mx6sabresd.h            | 14 ++++++
>  include/power/pfuze100_pmic.h           |  4 ++
>  3 files changed, 101 insertions(+)
> 
> diff --git a/board/freescale/mx6sabresd/mx6sabresd.c b/board/freescale/mx6sabresd/mx6sabresd.c
> index 3e314da..9e35711 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;
> +}
> +
> +int misc_init_r(void)
> +{

Do we need misc_init ? Why not to use power_init_board() ? It is already
defined as weak.

OT: I confess I am quite losing which functions are already foreseen.
Most of them have the prefix board_, and they are easier to find.
However, power_init_board() does not follow the same rule.

> +	struct pmic *p;
> +	int ret;
> +	unsigned int reg;
> +
> +	ret = pmic_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;
>  }
> diff --git a/include/configs/mx6sabresd.h b/include/configs/mx6sabresd.h
> index 0fa6573..fe846e6 100644
> --- a/include/configs/mx6sabresd.h
> +++ b/include/configs/mx6sabresd.h
> @@ -25,6 +25,8 @@
>  
>  #define CONFIG_SUPPORT_EMMC_BOOT /* eMMC specific */
>  
> +#define CONFIG_MISC_INIT_R
> +
>  #include "mx6sabre_common.h"
>  
>  #define CONFIG_SYS_FSL_USDHC_NUM	3
> @@ -59,4 +61,16 @@
>  #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 2a9032a..8968678 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,
> 

Best regards,
Stefano Babic

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