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Commit 28307e0a authored by Guennadi Liakhovetski's avatar Guennadi Liakhovetski Committed by Simon Horman
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ARM: shmobile: kzm9g: add AS3711 PMIC platform data 



KZM9G uses an AS3711 PMIC to supply power to the CPU and the LCD backlight.
The PMIC on the board is pre-programmed to supply correct voltages to the
CPU, power supply to the backlight has to be turned on at run-time. The
latter is currently performed by a hard-coded I2C command sequence in the
board file. This patch removes the backlight hack and instead adds an I2C
device to instantiate the AS3711 MFD driver, which will add a regulator
device to dynamically adjust CPU voltages and a backlight device.

Signed-off-by: default avatarGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: default avatarSimon Horman <horms+renesas@verge.net.au>
parent df53721a

arch/arm/mach-shmobile/board-kzm9g.c

+140 −53
Original line number Diff line number Diff line
@@ -29,6 +29,7 @@ 
#include <linux/mmc/host.h>

#include <linux/mmc/sh_mmcif.h>

#include <linux/mmc/sh_mobile_sdhi.h>

#include <linux/mfd/as3711.h>

#include <linux/mfd/tmio.h>

#include <linux/pinctrl/machine.h>

#include <linux/pinctrl/pinconf-generic.h>
@@ -606,6 +607,140 @@ static struct platform_device fsi_ak4648_device = { 
};



/* I2C */



/* StepDown1 is used to supply 1.315V to the CPU */

static struct regulator_init_data as3711_sd1 = {

	.constraints = {

		.name = "1.315V CPU",

		.boot_on = 1,

		.always_on = 1,

		.min_uV = 1315000,

		.max_uV = 1335000,

	},

};



/* StepDown2 is used to supply 1.8V to the CPU and to the board */

static struct regulator_init_data as3711_sd2 = {

	.constraints = {

		.name = "1.8V",

		.boot_on = 1,

		.always_on = 1,

		.min_uV = 1800000,

		.max_uV = 1800000,

	},

};



/*

 * StepDown3 is switched in parallel with StepDown2, seems to be off,

 * according to read-back pre-set register values

 */



/* StepDown4 is used to supply 1.215V to the CPU and to the board */

static struct regulator_init_data as3711_sd4 = {

	.constraints = {

		.name = "1.215V",

		.boot_on = 1,

		.always_on = 1,

		.min_uV = 1215000,

		.max_uV = 1235000,

	},

};



/* LDO1 is unused and unconnected */



/* LDO2 is used to supply 2.8V to the CPU */

static struct regulator_init_data as3711_ldo2 = {

	.constraints = {

		.name = "2.8V CPU",

		.boot_on = 1,

		.always_on = 1,

		.min_uV = 2800000,

		.max_uV = 2800000,

	},

};



/* LDO3 is used to supply 3.0V to the CPU */

static struct regulator_init_data as3711_ldo3 = {

	.constraints = {

		.name = "3.0V CPU",

		.boot_on = 1,

		.always_on = 1,

		.min_uV = 3000000,

		.max_uV = 3000000,

	},

};



/* LDO4 is used to supply 2.8V to the board */

static struct regulator_init_data as3711_ldo4 = {

	.constraints = {

		.name = "2.8V",

		.boot_on = 1,

		.always_on = 1,

		.min_uV = 2800000,

		.max_uV = 2800000,

	},

};



/* LDO5 is switched parallel to LDO4, also set to 2.8V */

static struct regulator_init_data as3711_ldo5 = {

	.constraints = {

		.name = "2.8V #2",

		.boot_on = 1,

		.always_on = 1,

		.min_uV = 2800000,

		.max_uV = 2800000,

	},

};



/* LDO6 is unused and unconnected */



/* LDO7 is used to supply 1.15V to the CPU */

static struct regulator_init_data as3711_ldo7 = {

	.constraints = {

		.name = "1.15V CPU",

		.boot_on = 1,

		.always_on = 1,

		.min_uV = 1150000,

		.max_uV = 1150000,

	},

};



/* LDO8 is switched parallel to LDO7, also set to 1.15V */

static struct regulator_init_data as3711_ldo8 = {

	.constraints = {

		.name = "1.15V CPU #2",

		.boot_on = 1,

		.always_on = 1,

		.min_uV = 1150000,

		.max_uV = 1150000,

	},

};



static struct as3711_platform_data as3711_pdata = {

	.regulator	= {

		.init_data	= {

			[AS3711_REGULATOR_SD_1] = &as3711_sd1,

			[AS3711_REGULATOR_SD_2] = &as3711_sd2,

			[AS3711_REGULATOR_SD_4] = &as3711_sd4,

			[AS3711_REGULATOR_LDO_2] = &as3711_ldo2,

			[AS3711_REGULATOR_LDO_3] = &as3711_ldo3,

			[AS3711_REGULATOR_LDO_4] = &as3711_ldo4,

			[AS3711_REGULATOR_LDO_5] = &as3711_ldo5,

			[AS3711_REGULATOR_LDO_7] = &as3711_ldo7,

			[AS3711_REGULATOR_LDO_8] = &as3711_ldo8,

		},

	},

	.backlight	= {

		.su2_fb = "sh_mobile_lcdc_fb.0",

		.su2_max_uA = 36000,

		.su2_feedback = AS3711_SU2_CURR_AUTO,

		.su2_fbprot = AS3711_SU2_GPIO4,

		.su2_auto_curr1 = true,

		.su2_auto_curr2 = true,

		.su2_auto_curr3 = true,

	},

};



static struct pcf857x_platform_data pcf8575_pdata = {

	.gpio_base	= GPIO_PCF8575_BASE,

};
@@ -625,6 +760,11 @@ static struct i2c_board_info i2c0_devices[] = { 
		I2C_BOARD_INFO("adxl34x", 0x1d),

		.irq = irq_pin(26), /* IRQ26 */

	},

	{

		I2C_BOARD_INFO("as3711", 0x40),

		.irq = intcs_evt2irq(0x3300), /* IRQ24 */

		.platform_data = &as3711_pdata,

	},

};



static struct i2c_board_info i2c1_devices[] = {
@@ -715,59 +855,6 @@ static const struct pinctrl_map kzm_pinctrl_map[] = { 
				  "usb_vbus", "usb"),

};



/*

 * FIXME

 *

 * This is quick hack for enabling LCDC backlight

 */

static int __init as3711_enable_lcdc_backlight(void)

{

	struct i2c_adapter *a = i2c_get_adapter(0);

	struct i2c_msg msg;

	int i, ret;

	__u8 magic[] = {

		0x40, 0x2a,

		0x43, 0x3c,

		0x44, 0x3c,

		0x45, 0x3c,

		0x54, 0x03,

		0x51, 0x00,

		0x51, 0x01,

		0xff, 0x00, /* wait */

		0x43, 0xf0,

		0x44, 0xf0,

		0x45, 0xf0,

	};



	if (!of_machine_is_compatible("renesas,kzm9g"))

		return 0;



	if (!a)

		return 0;



	msg.addr	= 0x40;

	msg.len		= 2;

	msg.flags	= 0;



	for (i = 0; i < ARRAY_SIZE(magic); i += 2) {

		msg.buf = magic + i;



		if (0xff == msg.buf[0]) {

			udelay(500);

			continue;

		}



		ret = i2c_transfer(a, &msg, 1);

		if (ret < 0) {

			pr_err("i2c transfer fail\n");

			break;

		}

	}



	return 0;

}

device_initcall(as3711_enable_lcdc_backlight);



static void __init kzm_init(void)

{

	regulator_register_always_on(2, "fixed-1.8V", fixed1v8_power_consumers,