Commit 2945fbc2 authored by Graeme Gregory's avatar Graeme Gregory Committed by Mark Brown
Browse files

mfd: palmas PMIC device support 



Palmas is a PMIC from Texas Instruments and this is the MFD part of the
driver for this chip. The PMIC has SMPS and LDO regulators, a general
purpose ADC, GPIO, USB OTG mode detection, watchdog and RTC features.

Signed-off-by: default avatarGraeme Gregory <gg@slimlogic.co.uk>
Acked-by: default avatarSamuel Ortiz <sameo@linux.intel.com>
Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
parent 38e7f5d1

drivers/mfd/palmas.c

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/*

 * TI Palmas MFD Driver

 *

 * Copyright 2011-2012 Texas Instruments Inc.

 *

 * Author: Graeme Gregory <gg@slimlogic.co.uk>

 *

 *  This program is free software; you can redistribute it and/or modify it

 *  under  the terms of the GNU General  Public License as published by the

 *  Free Software Foundation;  either version 2 of the License, or (at your

 *  option) any later version.

 *

 */



#include <linux/module.h>

#include <linux/moduleparam.h>

#include <linux/init.h>

#include <linux/slab.h>

#include <linux/i2c.h>

#include <linux/interrupt.h>

#include <linux/irq.h>

#include <linux/regmap.h>

#include <linux/err.h>

#include <linux/mfd/core.h>

#include <linux/mfd/palmas.h>



static const struct resource gpadc_resource[] = {

	{

		.name = "EOC_SW",

		.start = PALMAS_GPADC_EOC_SW_IRQ,

		.end = PALMAS_GPADC_EOC_SW_IRQ,

		.flags = IORESOURCE_IRQ,

	}

};



static const struct resource usb_resource[] = {

	{

		.name = "ID",

		.start = PALMAS_ID_OTG_IRQ,

		.end = PALMAS_ID_OTG_IRQ,

		.flags = IORESOURCE_IRQ,

	},

	{

		.name = "ID_WAKEUP",

		.start = PALMAS_ID_IRQ,

		.end = PALMAS_ID_IRQ,

		.flags = IORESOURCE_IRQ,

	},

	{

		.name = "VBUS",

		.start = PALMAS_VBUS_OTG_IRQ,

		.end = PALMAS_VBUS_OTG_IRQ,

		.flags = IORESOURCE_IRQ,

	},

	{

		.name = "VBUS_WAKEUP",

		.start = PALMAS_VBUS_IRQ,

		.end = PALMAS_VBUS_IRQ,

		.flags = IORESOURCE_IRQ,

	},

};



static const struct resource rtc_resource[] = {

	{

		.name = "RTC_ALARM",

		.start = PALMAS_RTC_ALARM_IRQ,

		.end = PALMAS_RTC_ALARM_IRQ,

		.flags = IORESOURCE_IRQ,

	},

};



static const struct resource pwron_resource[] = {

	{

		.name = "PWRON_BUTTON",

		.start = PALMAS_PWRON_IRQ,

		.end = PALMAS_PWRON_IRQ,

		.flags = IORESOURCE_IRQ,

	},

};



enum palmas_ids {

	PALMAS_PMIC_ID,

	PALMAS_GPIO_ID,

	PALMAS_LEDS_ID,

	PALMAS_WDT_ID,

	PALMAS_RTC_ID,

	PALMAS_PWRBUTTON_ID,

	PALMAS_GPADC_ID,

	PALMAS_RESOURCE_ID,

	PALMAS_CLK_ID,

	PALMAS_PWM_ID,

	PALMAS_USB_ID,

};



static const struct mfd_cell palmas_children[] = {

	{

		.name = "palmas-pmic",

		.id = PALMAS_PMIC_ID,

	},

	{

		.name = "palmas-gpio",

		.id = PALMAS_GPIO_ID,

	},

	{

		.name = "palmas-leds",

		.id = PALMAS_LEDS_ID,

	},

	{

		.name = "palmas-wdt",

		.id = PALMAS_WDT_ID,

	},

	{

		.name = "palmas-rtc",

		.num_resources = ARRAY_SIZE(rtc_resource),

		.resources = rtc_resource,

		.id = PALMAS_RTC_ID,

	},

	{

		.name = "palmas-pwrbutton",

		.num_resources = ARRAY_SIZE(pwron_resource),

		.resources = pwron_resource,

		.id = PALMAS_PWRBUTTON_ID,

	},

	{

		.name = "palmas-gpadc",

		.num_resources = ARRAY_SIZE(gpadc_resource),

		.resources = gpadc_resource,

		.id = PALMAS_GPADC_ID,

	},

	{

		.name = "palmas-resource",

		.id = PALMAS_RESOURCE_ID,

	},

	{

		.name = "palmas-clk",

		.id = PALMAS_CLK_ID,

	},

	{

		.name = "palmas-pwm",

		.id = PALMAS_PWM_ID,

	},

	{

		.name = "palmas-usb",

		.num_resources = ARRAY_SIZE(usb_resource),

		.resources = usb_resource,

		.id = PALMAS_USB_ID,

	}

};



static const struct regmap_config palmas_regmap_config[PALMAS_NUM_CLIENTS] = {

	{

		.reg_bits = 8,

		.val_bits = 8,

		.max_register = PALMAS_BASE_TO_REG(PALMAS_PU_PD_OD_BASE,

					PALMAS_PRIMARY_SECONDARY_PAD3),

	},

	{

		.reg_bits = 8,

		.val_bits = 8,

		.max_register = PALMAS_BASE_TO_REG(PALMAS_GPADC_BASE,

					PALMAS_GPADC_SMPS_VSEL_MONITORING),

	},

	{

		.reg_bits = 8,

		.val_bits = 8,

		.max_register = PALMAS_BASE_TO_REG(PALMAS_TRIM_GPADC_BASE,

					PALMAS_GPADC_TRIM16),

	},

};



static const struct regmap_irq palmas_irqs[] = {

	/* INT1 IRQs */

	[PALMAS_CHARG_DET_N_VBUS_OVV_IRQ] = {

		.mask = PALMAS_INT1_STATUS_CHARG_DET_N_VBUS_OVV,

	},

	[PALMAS_PWRON_IRQ] = {

		.mask = PALMAS_INT1_STATUS_PWRON,

	},

	[PALMAS_LONG_PRESS_KEY_IRQ] = {

		.mask = PALMAS_INT1_STATUS_LONG_PRESS_KEY,

	},

	[PALMAS_RPWRON_IRQ] = {

		.mask = PALMAS_INT1_STATUS_RPWRON,

	},

	[PALMAS_PWRDOWN_IRQ] = {

		.mask = PALMAS_INT1_STATUS_PWRDOWN,

	},

	[PALMAS_HOTDIE_IRQ] = {

		.mask = PALMAS_INT1_STATUS_HOTDIE,

	},

	[PALMAS_VSYS_MON_IRQ] = {

		.mask = PALMAS_INT1_STATUS_VSYS_MON,

	},

	[PALMAS_VBAT_MON_IRQ] = {

		.mask = PALMAS_INT1_STATUS_VBAT_MON,

	},

	/* INT2 IRQs*/

	[PALMAS_RTC_ALARM_IRQ] = {

		.mask = PALMAS_INT2_STATUS_RTC_ALARM,

		.reg_offset = 1,

	},

	[PALMAS_RTC_TIMER_IRQ] = {

		.mask = PALMAS_INT2_STATUS_RTC_TIMER,

		.reg_offset = 1,

	},

	[PALMAS_WDT_IRQ] = {

		.mask = PALMAS_INT2_STATUS_WDT,

		.reg_offset = 1,

	},

	[PALMAS_BATREMOVAL_IRQ] = {

		.mask = PALMAS_INT2_STATUS_BATREMOVAL,

		.reg_offset = 1,

	},

	[PALMAS_RESET_IN_IRQ] = {

		.mask = PALMAS_INT2_STATUS_RESET_IN,

		.reg_offset = 1,

	},

	[PALMAS_FBI_BB_IRQ] = {

		.mask = PALMAS_INT2_STATUS_FBI_BB,

		.reg_offset = 1,

	},

	[PALMAS_SHORT_IRQ] = {

		.mask = PALMAS_INT2_STATUS_SHORT,

		.reg_offset = 1,

	},

	[PALMAS_VAC_ACOK_IRQ] = {

		.mask = PALMAS_INT2_STATUS_VAC_ACOK,

		.reg_offset = 1,

	},

	/* INT3 IRQs */

	[PALMAS_GPADC_AUTO_0_IRQ] = {

		.mask = PALMAS_INT3_STATUS_GPADC_AUTO_0,

		.reg_offset = 2,

	},

	[PALMAS_GPADC_AUTO_1_IRQ] = {

		.mask = PALMAS_INT3_STATUS_GPADC_AUTO_1,

		.reg_offset = 2,

	},

	[PALMAS_GPADC_EOC_SW_IRQ] = {

		.mask = PALMAS_INT3_STATUS_GPADC_EOC_SW,

		.reg_offset = 2,

	},

	[PALMAS_GPADC_EOC_RT_IRQ] = {

		.mask = PALMAS_INT3_STATUS_GPADC_EOC_RT,

		.reg_offset = 2,

	},

	[PALMAS_ID_OTG_IRQ] = {

		.mask = PALMAS_INT3_STATUS_ID_OTG,

		.reg_offset = 2,

	},

	[PALMAS_ID_IRQ] = {

		.mask = PALMAS_INT3_STATUS_ID,

		.reg_offset = 2,

	},

	[PALMAS_VBUS_OTG_IRQ] = {

		.mask = PALMAS_INT3_STATUS_VBUS_OTG,

		.reg_offset = 2,

	},

	[PALMAS_VBUS_IRQ] = {

		.mask = PALMAS_INT3_STATUS_VBUS,

		.reg_offset = 2,

	},

	/* INT4 IRQs */

	[PALMAS_GPIO_0_IRQ] = {

		.mask = PALMAS_INT4_STATUS_GPIO_0,

		.reg_offset = 3,

	},

	[PALMAS_GPIO_1_IRQ] = {

		.mask = PALMAS_INT4_STATUS_GPIO_1,

		.reg_offset = 3,

	},

	[PALMAS_GPIO_2_IRQ] = {

		.mask = PALMAS_INT4_STATUS_GPIO_2,

		.reg_offset = 3,

	},

	[PALMAS_GPIO_3_IRQ] = {

		.mask = PALMAS_INT4_STATUS_GPIO_3,

		.reg_offset = 3,

	},

	[PALMAS_GPIO_4_IRQ] = {

		.mask = PALMAS_INT4_STATUS_GPIO_4,

		.reg_offset = 3,

	},

	[PALMAS_GPIO_5_IRQ] = {

		.mask = PALMAS_INT4_STATUS_GPIO_5,

		.reg_offset = 3,

	},

	[PALMAS_GPIO_6_IRQ] = {

		.mask = PALMAS_INT4_STATUS_GPIO_6,

		.reg_offset = 3,

	},

	[PALMAS_GPIO_7_IRQ] = {

		.mask = PALMAS_INT4_STATUS_GPIO_7,

		.reg_offset = 3,

	},

};



static struct regmap_irq_chip palmas_irq_chip = {

	.name = "palmas",

	.irqs = palmas_irqs,

	.num_irqs = ARRAY_SIZE(palmas_irqs),



	.num_regs = 4,

	.irq_reg_stride = 5,

	.status_base = PALMAS_BASE_TO_REG(PALMAS_INTERRUPT_BASE,

			PALMAS_INT1_STATUS),

	.mask_base = PALMAS_BASE_TO_REG(PALMAS_INTERRUPT_BASE,

			PALMAS_INT1_MASK),

};



static int __devinit palmas_i2c_probe(struct i2c_client *i2c,

			    const struct i2c_device_id *id)

{

	struct palmas *palmas;

	struct palmas_platform_data *pdata;

	int ret = 0, i;

	unsigned int reg, addr;

	int slave;

	struct mfd_cell *children;



	pdata = dev_get_platdata(&i2c->dev);

	if (!pdata)

		return -EINVAL;



	palmas = devm_kzalloc(&i2c->dev, sizeof(struct palmas), GFP_KERNEL);

	if (palmas == NULL)

		return -ENOMEM;



	i2c_set_clientdata(i2c, palmas);

	palmas->dev = &i2c->dev;

	palmas->id = id->driver_data;

	palmas->irq = i2c->irq;



	for (i = 0; i < PALMAS_NUM_CLIENTS; i++) {

		if (i == 0)

			palmas->i2c_clients[i] = i2c;

		else {

			palmas->i2c_clients[i] =

					i2c_new_dummy(i2c->adapter,

							i2c->addr + i);

			if (!palmas->i2c_clients[i]) {

				dev_err(palmas->dev,

					"can't attach client %d\n", i);

				ret = -ENOMEM;

				goto err;

			}

		}

		palmas->regmap[i] = devm_regmap_init_i2c(palmas->i2c_clients[i],

				&palmas_regmap_config[i]);

		if (IS_ERR(palmas->regmap[i])) {

			ret = PTR_ERR(palmas->regmap[i]);

			dev_err(palmas->dev,

				"Failed to allocate regmap %d, err: %d\n",

				i, ret);

			goto err;

		}

	}



	ret = regmap_add_irq_chip(palmas->regmap[1], palmas->irq,

			IRQF_ONESHOT | IRQF_TRIGGER_LOW, -1, &palmas_irq_chip,

			&palmas->irq_data);

	if (ret < 0)

		goto err;



	slave = PALMAS_BASE_TO_SLAVE(PALMAS_PU_PD_OD_BASE);

	addr = PALMAS_BASE_TO_REG(PALMAS_PU_PD_OD_BASE,

			PALMAS_PRIMARY_SECONDARY_PAD1);



	if (pdata->mux_from_pdata) {

		reg = pdata->pad1;

		ret = regmap_write(palmas->regmap[slave], addr, reg);

		if (ret)

			goto err;

	} else {

		ret = regmap_read(palmas->regmap[slave], addr, &reg);

		if (ret)

			goto err;

	}



	if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_0))

		palmas->gpio_muxed |= PALMAS_GPIO_0_MUXED;

	if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_MASK))

		palmas->gpio_muxed |= PALMAS_GPIO_1_MUXED;

	else if ((reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_MASK) ==

			(2 << PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_SHIFT))

		palmas->led_muxed |= PALMAS_LED1_MUXED;

	else if ((reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_MASK) ==

			(3 << PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_1_SHIFT))

		palmas->pwm_muxed |= PALMAS_PWM1_MUXED;

	if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_2_MASK))

		palmas->gpio_muxed |= PALMAS_GPIO_2_MUXED;

	else if ((reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_2_MASK) ==

			(2 << PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_2_SHIFT))

		palmas->led_muxed |= PALMAS_LED2_MUXED;

	else if ((reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_2_MASK) ==

			(3 << PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_2_SHIFT))

		palmas->pwm_muxed |= PALMAS_PWM2_MUXED;

	if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD1_GPIO_3))

		palmas->gpio_muxed |= PALMAS_GPIO_3_MUXED;



	addr = PALMAS_BASE_TO_REG(PALMAS_PU_PD_OD_BASE,

			PALMAS_PRIMARY_SECONDARY_PAD2);



	if (pdata->mux_from_pdata) {

		reg = pdata->pad2;

		ret = regmap_write(palmas->regmap[slave], addr, reg);

		if (ret)

			goto err;

	} else {

		ret = regmap_read(palmas->regmap[slave], addr, &reg);

		if (ret)

			goto err;

	}



	if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD2_GPIO_4))

		palmas->gpio_muxed |= PALMAS_GPIO_4_MUXED;

	if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD2_GPIO_5_MASK))

		palmas->gpio_muxed |= PALMAS_GPIO_5_MUXED;

	if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD2_GPIO_6))

		palmas->gpio_muxed |= PALMAS_GPIO_6_MUXED;

	if (!(reg & PALMAS_PRIMARY_SECONDARY_PAD2_GPIO_7_MASK))

		palmas->gpio_muxed |= PALMAS_GPIO_7_MUXED;



	dev_info(palmas->dev, "Muxing GPIO %x, PWM %x, LED %x\n",

			palmas->gpio_muxed, palmas->pwm_muxed,

			palmas->led_muxed);



	reg = pdata->power_ctrl;



	slave = PALMAS_BASE_TO_SLAVE(PALMAS_PMU_CONTROL_BASE);

	addr = PALMAS_BASE_TO_REG(PALMAS_PMU_CONTROL_BASE, PALMAS_POWER_CTRL);



	ret = regmap_write(palmas->regmap[slave], addr, reg);

	if (ret)

		goto err;



	children = kmemdup(palmas_children, sizeof(palmas_children),

			   GFP_KERNEL);

	if (!children) {

		ret = -ENOMEM;

		goto err;

	}



	ret = mfd_add_devices(palmas->dev, -1,

			      children, ARRAY_SIZE(palmas_children),

			      NULL, regmap_irq_chip_get_base(palmas->irq_data));

	kfree(children);



	if (ret < 0)

		goto err;



	return ret;



err:

	mfd_remove_devices(palmas->dev);

	kfree(palmas);

	return ret;

}



static int palmas_i2c_remove(struct i2c_client *i2c)

{

	struct palmas *palmas = i2c_get_clientdata(i2c);



	mfd_remove_devices(palmas->dev);

	regmap_del_irq_chip(palmas->irq, palmas->irq_data);



	return 0;

}



static const struct i2c_device_id palmas_i2c_id[] = {

	{ "palmas", },

	{ "twl6035", },

	{ "twl6037", },

	{ "tps65913", },

};

MODULE_DEVICE_TABLE(i2c, palmas_i2c_id);



static struct of_device_id __devinitdata of_palmas_match_tbl[] = {

	{ .compatible = "ti,palmas", },

	{ /* end */ }

};



static struct i2c_driver palmas_i2c_driver = {

	.driver = {

		   .name = "palmas",

		   .of_match_table = of_palmas_match_tbl,

		   .owner = THIS_MODULE,

	},

	.probe = palmas_i2c_probe,

	.remove = palmas_i2c_remove,

	.id_table = palmas_i2c_id,

};



static int __init palmas_i2c_init(void)

{

	return i2c_add_driver(&palmas_i2c_driver);

}

/* init early so consumer devices can complete system boot */

subsys_initcall(palmas_i2c_init);



static void __exit palmas_i2c_exit(void)

{

	i2c_del_driver(&palmas_i2c_driver);

}

module_exit(palmas_i2c_exit);



MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>");

MODULE_DESCRIPTION("Palmas chip family multi-function driver");

MODULE_LICENSE("GPL");

include/linux/mfd/palmas.h

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