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Commit 3c33be06 authored by Venu Byravarasu's avatar Venu Byravarasu Committed by Samuel Ortiz
Browse files

mfd: Add support for TPS65090 



TPS65090 is a Texas Instrument PMIC. It contains 3 Step-Down converters, 2
always on LDO's and  7 current limited load switches.

Signed-off-by: default avatarVenu Byravarasu <vbyravarasu@nvidia.com>
Signed-off-by: default avatarSamuel Ortiz <sameo@linux.intel.com>
parent bcc2d6d6

drivers/mfd/Kconfig

+12 −0
Original line number Original line Diff line number Diff line
@@ -827,6 +827,18 @@ config MFD_PM8XXX_IRQ 
config TPS65911_COMPARATOR

config TPS65911_COMPARATOR

	tristate

	tristate





config MFD_TPS65090

	bool "TPS65090 Power Management chips"

	depends on I2C=y && GENERIC_HARDIRQS

	select MFD_CORE

	select REGMAP_I2C

	help

	  If you say yes here you get support for the TPS65090 series of

	  Power Management chips.

	  This driver provides common support for accessing the device,

	  additional drivers must be enabled in order to use the

	  functionality of the device.



config MFD_AAT2870_CORE

config MFD_AAT2870_CORE

	bool "Support for the AnalogicTech AAT2870"

	bool "Support for the AnalogicTech AAT2870"

	select MFD_CORE

	select MFD_CORE

drivers/mfd/Makefile

+1 −0
Original line number Original line Diff line number Diff line
@@ -110,6 +110,7 @@ obj-$(CONFIG_MFD_OMAP_USB_HOST) += omap-usb-host.o 
obj-$(CONFIG_MFD_PM8921_CORE) 	+= pm8921-core.o

obj-$(CONFIG_MFD_PM8921_CORE) 	+= pm8921-core.o

obj-$(CONFIG_MFD_PM8XXX_IRQ) 	+= pm8xxx-irq.o

obj-$(CONFIG_MFD_PM8XXX_IRQ) 	+= pm8xxx-irq.o

obj-$(CONFIG_TPS65911_COMPARATOR)	+= tps65911-comparator.o

obj-$(CONFIG_TPS65911_COMPARATOR)	+= tps65911-comparator.o

obj-$(CONFIG_MFD_TPS65090)	+= tps65090.o

obj-$(CONFIG_MFD_AAT2870_CORE)	+= aat2870-core.o

obj-$(CONFIG_MFD_AAT2870_CORE)	+= aat2870-core.o

obj-$(CONFIG_MFD_INTEL_MSIC)	+= intel_msic.o

obj-$(CONFIG_MFD_INTEL_MSIC)	+= intel_msic.o

obj-$(CONFIG_MFD_RC5T583)	+= rc5t583.o rc5t583-irq.o

obj-$(CONFIG_MFD_RC5T583)	+= rc5t583.o rc5t583-irq.o

drivers/mfd/tps65090.c

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+387 −0
Original line number Original line Diff line number Diff line 
/*

 * Core driver for TI TPS65090 PMIC family

 *

 * Copyright (c) 2012, NVIDIA CORPORATION.  All rights reserved.



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

 * under the terms and conditions of the GNU General Public License,

 * version 2, as published by the Free Software Foundation.



 * This program is distributed in the hope it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for

 * more details.



 * You should have received a copy of the GNU General Public License

 * along with this program.  If not, see <http://www.gnu.org/licenses/>.

 */



#include <linux/interrupt.h>

#include <linux/irq.h>

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/mutex.h>

#include <linux/slab.h>

#include <linux/i2c.h>

#include <linux/mfd/core.h>

#include <linux/mfd/tps65090.h>

#include <linux/regmap.h>

#include <linux/err.h>



#define NUM_INT_REG 2

#define TOTAL_NUM_REG 0x18



/* interrupt status registers */

#define TPS65090_INT_STS	0x0

#define TPS65090_INT_STS2	0x1



/* interrupt mask registers */

#define TPS65090_INT_MSK	0x2

#define TPS65090_INT_MSK2	0x3



struct tps65090_irq_data {

	u8		mask_reg;

	u8		mask_pos;

};



#define TPS65090_IRQ(_reg, _mask_pos)		\

	{					\

		.mask_reg	= (_reg),	\

		.mask_pos	= (_mask_pos),	\

	}



static const struct tps65090_irq_data tps65090_irqs[] = {

	[0]		= TPS65090_IRQ(0, 0),

	[1]		= TPS65090_IRQ(0, 1),

	[2]		= TPS65090_IRQ(0, 2),

	[3]		= TPS65090_IRQ(0, 3),

	[4]		= TPS65090_IRQ(0, 4),

	[5]		= TPS65090_IRQ(0, 5),

	[6]		= TPS65090_IRQ(0, 6),

	[7]		= TPS65090_IRQ(0, 7),

	[8]		= TPS65090_IRQ(1, 0),

	[9]		= TPS65090_IRQ(1, 1),

	[10]		= TPS65090_IRQ(1, 2),

	[11]		= TPS65090_IRQ(1, 3),

	[12]		= TPS65090_IRQ(1, 4),

	[13]		= TPS65090_IRQ(1, 5),

	[14]		= TPS65090_IRQ(1, 6),

	[15]		= TPS65090_IRQ(1, 7),

};



static struct mfd_cell tps65090s[] = {

	{

		.name = "tps65910-pmic",

	},

	{

		.name = "tps65910-regulator",

	},

};



struct tps65090 {

	struct mutex		lock;

	struct device		*dev;

	struct i2c_client	*client;

	struct regmap		*rmap;

	struct irq_chip		irq_chip;

	struct mutex		irq_lock;

	int			irq_base;

	unsigned int		id;

};



int tps65090_write(struct device *dev, int reg, uint8_t val)

{

	struct tps65090 *tps = dev_get_drvdata(dev);

	return regmap_write(tps->rmap, reg, val);

}

EXPORT_SYMBOL_GPL(tps65090_write);



int tps65090_read(struct device *dev, int reg, uint8_t *val)

{

	struct tps65090 *tps = dev_get_drvdata(dev);

	unsigned int temp_val;

	int ret;

	ret = regmap_read(tps->rmap, reg, &temp_val);

	if (!ret)

		*val = temp_val;

	return ret;

}

EXPORT_SYMBOL_GPL(tps65090_read);



int tps65090_set_bits(struct device *dev, int reg, uint8_t bit_num)

{

	struct tps65090 *tps = dev_get_drvdata(dev);

	return regmap_update_bits(tps->rmap, reg, BIT(bit_num), ~0u);

}

EXPORT_SYMBOL_GPL(tps65090_set_bits);



int tps65090_clr_bits(struct device *dev, int reg, uint8_t bit_num)

{

	struct tps65090 *tps = dev_get_drvdata(dev);

	return regmap_update_bits(tps->rmap, reg, BIT(bit_num), 0u);

}

EXPORT_SYMBOL_GPL(tps65090_clr_bits);



static void tps65090_irq_lock(struct irq_data *data)

{

	struct tps65090 *tps65090 = irq_data_get_irq_chip_data(data);



	mutex_lock(&tps65090->irq_lock);

}



static void tps65090_irq_mask(struct irq_data *irq_data)

{

	struct tps65090 *tps65090 = irq_data_get_irq_chip_data(irq_data);

	unsigned int __irq = irq_data->hwirq;

	const struct tps65090_irq_data *data = &tps65090_irqs[__irq];



	tps65090_set_bits(tps65090->dev, (TPS65090_INT_MSK + data->mask_reg),

		data->mask_pos);

}



static void tps65090_irq_unmask(struct irq_data *irq_data)

{

	struct tps65090 *tps65090 = irq_data_get_irq_chip_data(irq_data);

	unsigned int __irq = irq_data->irq - tps65090->irq_base;

	const struct tps65090_irq_data *data = &tps65090_irqs[__irq];



	tps65090_clr_bits(tps65090->dev, (TPS65090_INT_MSK + data->mask_reg),

		data->mask_pos);

}



static void tps65090_irq_sync_unlock(struct irq_data *data)

{

	struct tps65090 *tps65090 = irq_data_get_irq_chip_data(data);



	mutex_unlock(&tps65090->irq_lock);

}



static irqreturn_t tps65090_irq(int irq, void *data)

{

	struct tps65090 *tps65090 = data;

	int ret = 0;

	u8 status, mask;

	unsigned long int acks = 0;

	int i;



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

		ret = tps65090_read(tps65090->dev, TPS65090_INT_MSK + i, &mask);

		if (ret < 0) {

			dev_err(tps65090->dev,

				"failed to read mask reg [addr:%d]\n",

				TPS65090_INT_MSK + i);

			return IRQ_NONE;

		}

		ret = tps65090_read(tps65090->dev, TPS65090_INT_STS + i,

			&status);

		if (ret < 0) {

			dev_err(tps65090->dev,

				"failed to read status reg [addr:%d]\n",

				 TPS65090_INT_STS + i);

			return IRQ_NONE;

		}

		if (status) {

			/* Ack only those interrupts which are not masked */

			status &= (~mask);

			ret = tps65090_write(tps65090->dev,

					TPS65090_INT_STS + i, status);

			if (ret < 0) {

				dev_err(tps65090->dev,

					"failed to write interrupt status\n");

				return IRQ_NONE;

			}

			acks |= (status << (i * 8));

		}

	}



	for_each_set_bit(i, &acks, ARRAY_SIZE(tps65090_irqs))

		handle_nested_irq(tps65090->irq_base + i);

	return acks ? IRQ_HANDLED : IRQ_NONE;

}



static int __devinit tps65090_irq_init(struct tps65090 *tps65090, int irq,

	int irq_base)

{

	int i, ret;



	if (!irq_base) {

		dev_err(tps65090->dev, "IRQ base not set\n");

		return -EINVAL;

	}



	mutex_init(&tps65090->irq_lock);



	for (i = 0; i < NUM_INT_REG; i++)

		tps65090_write(tps65090->dev, TPS65090_INT_MSK + i, 0xFF);



	for (i = 0; i < NUM_INT_REG; i++)

		tps65090_write(tps65090->dev, TPS65090_INT_STS + i, 0xff);



	tps65090->irq_base = irq_base;

	tps65090->irq_chip.name = "tps65090";

	tps65090->irq_chip.irq_mask = tps65090_irq_mask;

	tps65090->irq_chip.irq_unmask = tps65090_irq_unmask;

	tps65090->irq_chip.irq_bus_lock = tps65090_irq_lock;

	tps65090->irq_chip.irq_bus_sync_unlock = tps65090_irq_sync_unlock;



	for (i = 0; i < ARRAY_SIZE(tps65090_irqs); i++) {

		int __irq = i + tps65090->irq_base;

		irq_set_chip_data(__irq, tps65090);

		irq_set_chip_and_handler(__irq, &tps65090->irq_chip,

					 handle_simple_irq);

		irq_set_nested_thread(__irq, 1);

#ifdef CONFIG_ARM

		set_irq_flags(__irq, IRQF_VALID);

#endif

	}



	ret = request_threaded_irq(irq, NULL, tps65090_irq, IRQF_ONESHOT,

				"tps65090", tps65090);

	if (!ret) {

		device_init_wakeup(tps65090->dev, 1);

		enable_irq_wake(irq);

	}



	return ret;

}



static bool is_volatile_reg(struct device *dev, unsigned int reg)

{

	if ((reg == TPS65090_INT_STS) || (reg == TPS65090_INT_STS))

		return true;

	else

		return false;

}



static const struct regmap_config tps65090_regmap_config = {

	.reg_bits = 8,

	.val_bits = 8,

	.max_register = TOTAL_NUM_REG,

	.num_reg_defaults_raw = TOTAL_NUM_REG,

	.cache_type = REGCACHE_RBTREE,

	.volatile_reg = is_volatile_reg,

};



static int __devinit tps65090_i2c_probe(struct i2c_client *client,

					const struct i2c_device_id *id)

{

	struct tps65090_platform_data *pdata = client->dev.platform_data;

	struct tps65090 *tps65090;

	int ret;



	if (!pdata) {

		dev_err(&client->dev, "tps65090 requires platform data\n");

		return -EINVAL;

	}



	tps65090 = devm_kzalloc(&client->dev, sizeof(struct tps65090),

		GFP_KERNEL);

	if (tps65090 == NULL)

		return -ENOMEM;



	tps65090->client = client;

	tps65090->dev = &client->dev;

	i2c_set_clientdata(client, tps65090);



	mutex_init(&tps65090->lock);



	if (client->irq) {

		ret = tps65090_irq_init(tps65090, client->irq, pdata->irq_base);

		if (ret) {

			dev_err(&client->dev, "IRQ init failed with err: %d\n",

				ret);

			goto err_exit;

		}

	}



	tps65090->rmap = regmap_init_i2c(tps65090->client,

		&tps65090_regmap_config);

	if (IS_ERR(tps65090->rmap)) {

		dev_err(&client->dev, "regmap_init failed with err: %ld\n",

			PTR_ERR(tps65090->rmap));

		goto err_irq_exit;

	};



	ret = mfd_add_devices(tps65090->dev, -1, tps65090s,

		ARRAY_SIZE(tps65090s), NULL, 0);

	if (ret) {

		dev_err(&client->dev, "add mfd devices failed with err: %d\n",

			ret);

		goto err_regmap_exit;

	}



	return 0;



err_regmap_exit:

	regmap_exit(tps65090->rmap);



err_irq_exit:

	if (client->irq)

		free_irq(client->irq, tps65090);

err_exit:

	return ret;

}



static int __devexit tps65090_i2c_remove(struct i2c_client *client)

{

	struct tps65090 *tps65090 = i2c_get_clientdata(client);



	mfd_remove_devices(tps65090->dev);

	regmap_exit(tps65090->rmap);

	if (client->irq)

		free_irq(client->irq, tps65090);



	return 0;

}



#ifdef CONFIG_PM

static int tps65090_i2c_suspend(struct i2c_client *client, pm_message_t state)

{

	if (client->irq)

		disable_irq(client->irq);

	return 0;

}



static int tps65090_i2c_resume(struct i2c_client *client)

{

	if (client->irq)

		enable_irq(client->irq);

	return 0;

}

#endif



static const struct i2c_device_id tps65090_id_table[] = {

	{ "tps65090", 0 },

	{ },

};

MODULE_DEVICE_TABLE(i2c, tps65090_id_table);



static struct i2c_driver tps65090_driver = {

	.driver	= {

		.name	= "tps65090",

		.owner	= THIS_MODULE,

	},

	.probe		= tps65090_i2c_probe,

	.remove		= __devexit_p(tps65090_i2c_remove),

#ifdef CONFIG_PM

	.suspend	= tps65090_i2c_suspend,

	.resume		= tps65090_i2c_resume,

#endif

	.id_table	= tps65090_id_table,

};



static int __init tps65090_init(void)

{

	return i2c_add_driver(&tps65090_driver);

}

subsys_initcall(tps65090_init);



static void __exit tps65090_exit(void)

{

	i2c_del_driver(&tps65090_driver);

}

module_exit(tps65090_exit);



MODULE_DESCRIPTION("TPS65090 core driver");

MODULE_AUTHOR("Venu Byravarasu <vbyravarasu@nvidia.com>");

MODULE_LICENSE("GPL v2");

include/linux/mfd/tps65090.h

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Original line number Original line Diff line number Diff line 
/*

 * Core driver interface for TI TPS65090 PMIC family

 *

 * Copyright (C) 2012 NVIDIA Corporation

 *

 * 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.

 *

 * This program is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for

 * more details.

 *

 * You should have received a copy of the GNU General Public License along

 * with this program; if not, write to the Free Software Foundation, Inc.,

 * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

 *

 */



#ifndef __LINUX_MFD_TPS65090_H

#define __LINUX_MFD_TPS65090_H



struct tps65090_subdev_info {

	int		id;

	const char	*name;

	void		*platform_data;

};



struct tps65090_platform_data {

	int irq_base;

	int num_subdevs;

	struct tps65090_subdev_info *subdevs;

};



/*

 * NOTE: the functions below are not intended for use outside

 * of the TPS65090 sub-device drivers

 */

extern int tps65090_write(struct device *dev, int reg, uint8_t val);

extern int tps65090_read(struct device *dev, int reg, uint8_t *val);

extern int tps65090_set_bits(struct device *dev, int reg, uint8_t bit_num);

extern int tps65090_clr_bits(struct device *dev, int reg, uint8_t bit_num);



#endif /*__LINUX_MFD_TPS65090_H */