drivers/mfd/palmas.c - kernel/msm-4.19 - Gitiles

 /*
  * 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>
 #include <linux/of_platform.h>

 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 palmas_set_pdata_irq_flag(struct i2c_client *i2c,
 		struct palmas_platform_data *pdata)
 {
 	struct irq_data *irq_data = irq_get_irq_data(i2c->irq);
 	if (!irq_data) {
 		dev_err(&i2c->dev, "Invalid IRQ: %d\n", i2c->irq);
 		return -EINVAL;
 	}

 	pdata->irq_flags = irqd_get_trigger_type(irq_data);
 	dev_info(&i2c->dev, "Irq flag is 0x%08x\n", pdata->irq_flags);
 	return 0;
 }

 static void palmas_dt_to_pdata(struct i2c_client *i2c,
 		struct palmas_platform_data *pdata)
 {
 	struct device_node *node = i2c->dev.of_node;
 	int ret;
 	u32 prop;

 	ret = of_property_read_u32(node, "ti,mux-pad1", &prop);
 	if (!ret) {
 		pdata->mux_from_pdata = 1;
 		pdata->pad1 = prop;
 	}

 	ret = of_property_read_u32(node, "ti,mux-pad2", &prop);
 	if (!ret) {
 		pdata->mux_from_pdata = 1;
 		pdata->pad2 = prop;
 	}

 	/* The default for this register is all masked */
 	ret = of_property_read_u32(node, "ti,power-ctrl", &prop);
 	if (!ret)
 		pdata->power_ctrl = prop;
 	else
 		pdata->power_ctrl = PALMAS_POWER_CTRL_NSLEEP_MASK |
 					PALMAS_POWER_CTRL_ENABLE1_MASK |
 					PALMAS_POWER_CTRL_ENABLE2_MASK;
 	if (i2c->irq)
 		palmas_set_pdata_irq_flag(i2c, pdata);
 }

 static int palmas_i2c_probe(struct i2c_client *i2c,
 			    const struct i2c_device_id *id)
 {
 	struct palmas *palmas;
 	struct palmas_platform_data *pdata;
 	struct device_node *node = i2c->dev.of_node;
 	int ret = 0, i;
 	unsigned int reg, addr;
 	int slave;

 	pdata = dev_get_platdata(&i2c->dev);

 	if (node && !pdata) {
 		pdata = devm_kzalloc(&i2c->dev, sizeof(*pdata), GFP_KERNEL);

 		if (!pdata)
 			return -ENOMEM;

 		palmas_dt_to_pdata(i2c, pdata);
 	}

 	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->i2c_clients[i]->dev.of_node = of_node_get(node);
 		}
 		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;
 		}
 	}

 	/* Change interrupt line output polarity */
 	if (pdata->irq_flags & IRQ_TYPE_LEVEL_HIGH)
 		reg = PALMAS_POLARITY_CTRL_INT_POLARITY;
 	else
 		reg = 0;
 	ret = palmas_update_bits(palmas, PALMAS_PU_PD_OD_BASE,
 			PALMAS_POLARITY_CTRL, PALMAS_POLARITY_CTRL_INT_POLARITY,
 			reg);
 	if (ret < 0) {
 		dev_err(palmas->dev, "POLARITY_CTRL updat failed: %d\n", ret);
 		goto err;
 	}

 	/* Change IRQ into clear on read mode for efficiency */
 	slave = PALMAS_BASE_TO_SLAVE(PALMAS_INTERRUPT_BASE);
 	addr = PALMAS_BASE_TO_REG(PALMAS_INTERRUPT_BASE, PALMAS_INT_CTRL);
 	reg = PALMAS_INT_CTRL_INT_CLEAR;

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

 	ret = regmap_add_irq_chip(palmas->regmap[slave], palmas->irq,
 			IRQF_ONESHOT | pdata->irq_flags, 0, &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_irq;
 	} else {
 		ret = regmap_read(palmas->regmap[slave], addr, &reg);
 		if (ret)
 			goto err_irq;
 	}

 	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_irq;
 	} else {
 		ret = regmap_read(palmas->regmap[slave], addr, &reg);
 		if (ret)
 			goto err_irq;
 	}

 	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_irq;

 	/*
 	 * If we are probing with DT do this the DT way and return here
 	 * otherwise continue and add devices using mfd helpers.
 	 */
 	if (node) {
 		ret = of_platform_populate(node, NULL, NULL, &i2c->dev);
 		if (ret < 0)
 			goto err_irq;
 		else
 			return ret;
 	}

 	return ret;

 err_irq:
 	regmap_del_irq_chip(palmas->irq, palmas->irq_data);
 err:
 	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", },
 	{ /* end */ }
 };
 MODULE_DEVICE_TABLE(i2c, palmas_i2c_id);

 static struct of_device_id 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");
	/*
	* 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>
	#include <linux/of_platform.h>

	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 palmas_set_pdata_irq_flag(struct i2c_client *i2c,
	struct palmas_platform_data *pdata)
	{
	struct irq_data *irq_data = irq_get_irq_data(i2c->irq);
	if (!irq_data) {
	dev_err(&i2c->dev, "Invalid IRQ: %d\n", i2c->irq);
	return -EINVAL;
	}

	pdata->irq_flags = irqd_get_trigger_type(irq_data);
	dev_info(&i2c->dev, "Irq flag is 0x%08x\n", pdata->irq_flags);
	return 0;
	}

	static void palmas_dt_to_pdata(struct i2c_client *i2c,
	struct palmas_platform_data *pdata)
	{
	struct device_node *node = i2c->dev.of_node;
	int ret;
	u32 prop;

	ret = of_property_read_u32(node, "ti,mux-pad1", &prop);
	if (!ret) {
	pdata->mux_from_pdata = 1;
	pdata->pad1 = prop;
	}

	ret = of_property_read_u32(node, "ti,mux-pad2", &prop);
	if (!ret) {
	pdata->mux_from_pdata = 1;
	pdata->pad2 = prop;
	}

	/* The default for this register is all masked */
	ret = of_property_read_u32(node, "ti,power-ctrl", &prop);
	if (!ret)
	pdata->power_ctrl = prop;
	else
	pdata->power_ctrl = PALMAS_POWER_CTRL_NSLEEP_MASK \|
	PALMAS_POWER_CTRL_ENABLE1_MASK \|
	PALMAS_POWER_CTRL_ENABLE2_MASK;
	if (i2c->irq)
	palmas_set_pdata_irq_flag(i2c, pdata);
	}

	static int palmas_i2c_probe(struct i2c_client *i2c,
	const struct i2c_device_id *id)
	{
	struct palmas *palmas;
	struct palmas_platform_data *pdata;
	struct device_node *node = i2c->dev.of_node;
	int ret = 0, i;
	unsigned int reg, addr;
	int slave;

	pdata = dev_get_platdata(&i2c->dev);

	if (node && !pdata) {
	pdata = devm_kzalloc(&i2c->dev, sizeof(*pdata), GFP_KERNEL);

	if (!pdata)
	return -ENOMEM;

	palmas_dt_to_pdata(i2c, pdata);
	}

	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->i2c_clients[i]->dev.of_node = of_node_get(node);
	}
	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;
	}
	}

	/* Change interrupt line output polarity */
	if (pdata->irq_flags & IRQ_TYPE_LEVEL_HIGH)
	reg = PALMAS_POLARITY_CTRL_INT_POLARITY;
	else
	reg = 0;
	ret = palmas_update_bits(palmas, PALMAS_PU_PD_OD_BASE,
	PALMAS_POLARITY_CTRL, PALMAS_POLARITY_CTRL_INT_POLARITY,
	reg);
	if (ret < 0) {
	dev_err(palmas->dev, "POLARITY_CTRL updat failed: %d\n", ret);
	goto err;
	}

	/* Change IRQ into clear on read mode for efficiency */
	slave = PALMAS_BASE_TO_SLAVE(PALMAS_INTERRUPT_BASE);
	addr = PALMAS_BASE_TO_REG(PALMAS_INTERRUPT_BASE, PALMAS_INT_CTRL);
	reg = PALMAS_INT_CTRL_INT_CLEAR;

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

	ret = regmap_add_irq_chip(palmas->regmap[slave], palmas->irq,
	IRQF_ONESHOT \| pdata->irq_flags, 0, &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_irq;
	} else {
	ret = regmap_read(palmas->regmap[slave], addr, &reg);
	if (ret)
	goto err_irq;
	}

	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_irq;
	} else {
	ret = regmap_read(palmas->regmap[slave], addr, &reg);
	if (ret)
	goto err_irq;
	}

	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_irq;

	/*
	* If we are probing with DT do this the DT way and return here
	* otherwise continue and add devices using mfd helpers.
	*/
	if (node) {
	ret = of_platform_populate(node, NULL, NULL, &i2c->dev);
	if (ret < 0)
	goto err_irq;
	else
	return ret;
	}

	return ret;

	err_irq:
	regmap_del_irq_chip(palmas->irq, palmas->irq_data);
	err:
	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", },
	{ /* end */ }
	};
	MODULE_DEVICE_TABLE(i2c, palmas_i2c_id);

	static struct of_device_id 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");