1 files changed, 387 insertions, 0 deletions
diff --git a/drivers/mfd/tps65090.c b/drivers/mfd/tps65090.c
new file mode 100644
index 000000000000..a66d4df51293
--- /dev/null
+++ b/drivers/mfd/tps65090.c
@@ -0,0 +1,387 @@
+/*
+ * 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");

diff --git a/drivers/mfd/tps65090.c b/drivers/mfd/tps65090.c new file mode 100644 index 000000000000..a66d4df51293 --- /dev/null +++ b/drivers/mfd/tps65090.c
@@ -0,0 +1,387 @@
	1	/*
	2	* Core driver for TI TPS65090 PMIC family
	3	*
	4	* Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
	5
	6	* This program is free software; you can redistribute it and/or modify it
	7	* under the terms and conditions of the GNU General Public License,
	8	* version 2, as published by the Free Software Foundation.
	9
	10	* This program is distributed in the hope it will be useful, but WITHOUT
	11	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	12	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	13	* more details.
	14
	15	* You should have received a copy of the GNU General Public License
	16	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	17	*/
	18
	19	#include <linux/interrupt.h>
	20	#include <linux/irq.h>
	21	#include <linux/kernel.h>
	22	#include <linux/module.h>
	23	#include <linux/mutex.h>
	24	#include <linux/slab.h>
	25	#include <linux/i2c.h>
	26	#include <linux/mfd/core.h>
	27	#include <linux/mfd/tps65090.h>
	28	#include <linux/regmap.h>
	29	#include <linux/err.h>
	30
	31	#define NUM_INT_REG 2
	32	#define TOTAL_NUM_REG 0x18
	33
	34	/* interrupt status registers */
	35	#define TPS65090_INT_STS 0x0
	36	#define TPS65090_INT_STS2 0x1
	37
	38	/* interrupt mask registers */
	39	#define TPS65090_INT_MSK 0x2
	40	#define TPS65090_INT_MSK2 0x3
	41
	42	struct tps65090_irq_data {
	43	u8 mask_reg;
	44	u8 mask_pos;
	45	};
	46
	47	#define TPS65090_IRQ(_reg, _mask_pos) \
	48	{ \
	49	.mask_reg = (_reg), \
	50	.mask_pos = (_mask_pos), \
	51	}
	52
	53	static const struct tps65090_irq_data tps65090_irqs[] = {
	54	[0] = TPS65090_IRQ(0, 0),
	55	[1] = TPS65090_IRQ(0, 1),
	56	[2] = TPS65090_IRQ(0, 2),
	57	[3] = TPS65090_IRQ(0, 3),
	58	[4] = TPS65090_IRQ(0, 4),
	59	[5] = TPS65090_IRQ(0, 5),
	60	[6] = TPS65090_IRQ(0, 6),
	61	[7] = TPS65090_IRQ(0, 7),
	62	[8] = TPS65090_IRQ(1, 0),
	63	[9] = TPS65090_IRQ(1, 1),
	64	[10] = TPS65090_IRQ(1, 2),
	65	[11] = TPS65090_IRQ(1, 3),
	66	[12] = TPS65090_IRQ(1, 4),
	67	[13] = TPS65090_IRQ(1, 5),
	68	[14] = TPS65090_IRQ(1, 6),
	69	[15] = TPS65090_IRQ(1, 7),
	70	};
	71
	72	static struct mfd_cell tps65090s[] = {
	73	{
	74	.name = "tps65910-pmic",
	75	},
	76	{
	77	.name = "tps65910-regulator",
	78	},
	79	};
	80
	81	struct tps65090 {
	82	struct mutex lock;
	83	struct device *dev;
	84	struct i2c_client *client;
	85	struct regmap *rmap;
	86	struct irq_chip irq_chip;
	87	struct mutex irq_lock;
	88	int irq_base;
	89	unsigned int id;
	90	};
	91
	92	int tps65090_write(struct device *dev, int reg, uint8_t val)
	93	{
	94	struct tps65090 *tps = dev_get_drvdata(dev);
	95	return regmap_write(tps->rmap, reg, val);
	96	}
	97	EXPORT_SYMBOL_GPL(tps65090_write);
	98
	99	int tps65090_read(struct device dev, int reg, uint8_t val)
	100	{
	101	struct tps65090 *tps = dev_get_drvdata(dev);
	102	unsigned int temp_val;
	103	int ret;
	104	ret = regmap_read(tps->rmap, reg, &temp_val);
	105	if (!ret)
	106	*val = temp_val;
	107	return ret;
	108	}
	109	EXPORT_SYMBOL_GPL(tps65090_read);
	110
	111	int tps65090_set_bits(struct device *dev, int reg, uint8_t bit_num)
	112	{
	113	struct tps65090 *tps = dev_get_drvdata(dev);
	114	return regmap_update_bits(tps->rmap, reg, BIT(bit_num), ~0u);
	115	}
	116	EXPORT_SYMBOL_GPL(tps65090_set_bits);
	117
	118	int tps65090_clr_bits(struct device *dev, int reg, uint8_t bit_num)
	119	{
	120	struct tps65090 *tps = dev_get_drvdata(dev);
	121	return regmap_update_bits(tps->rmap, reg, BIT(bit_num), 0u);
	122	}
	123	EXPORT_SYMBOL_GPL(tps65090_clr_bits);
	124
	125	static void tps65090_irq_lock(struct irq_data *data)
	126	{
	127	struct tps65090 *tps65090 = irq_data_get_irq_chip_data(data);
	128
	129	mutex_lock(&tps65090->irq_lock);
	130	}
	131
	132	static void tps65090_irq_mask(struct irq_data *irq_data)
	133	{
	134	struct tps65090 *tps65090 = irq_data_get_irq_chip_data(irq_data);
	135	unsigned int __irq = irq_data->hwirq;
	136	const struct tps65090_irq_data *data = &tps65090_irqs[__irq];
	137
	138	tps65090_set_bits(tps65090->dev, (TPS65090_INT_MSK + data->mask_reg),
	139	data->mask_pos);
	140	}
	141
	142	static void tps65090_irq_unmask(struct irq_data *irq_data)
	143	{
	144	struct tps65090 *tps65090 = irq_data_get_irq_chip_data(irq_data);
	145	unsigned int __irq = irq_data->irq - tps65090->irq_base;
	146	const struct tps65090_irq_data *data = &tps65090_irqs[__irq];
	147
	148	tps65090_clr_bits(tps65090->dev, (TPS65090_INT_MSK + data->mask_reg),
	149	data->mask_pos);
	150	}
	151
	152	static void tps65090_irq_sync_unlock(struct irq_data *data)
	153	{
	154	struct tps65090 *tps65090 = irq_data_get_irq_chip_data(data);
	155
	156	mutex_unlock(&tps65090->irq_lock);
	157	}
	158
	159	static irqreturn_t tps65090_irq(int irq, void *data)
	160	{
	161	struct tps65090 *tps65090 = data;
	162	int ret = 0;
	163	u8 status, mask;
	164	unsigned long int acks = 0;
	165	int i;
	166
	167	for (i = 0; i < NUM_INT_REG; i++) {
	168	ret = tps65090_read(tps65090->dev, TPS65090_INT_MSK + i, &mask);
	169	if (ret < 0) {
	170	dev_err(tps65090->dev,
	171	"failed to read mask reg [addr:%d]\n",
	172	TPS65090_INT_MSK + i);
	173	return IRQ_NONE;
	174	}
	175	ret = tps65090_read(tps65090->dev, TPS65090_INT_STS + i,
	176	&status);
	177	if (ret < 0) {
	178	dev_err(tps65090->dev,
	179	"failed to read status reg [addr:%d]\n",
	180	TPS65090_INT_STS + i);
	181	return IRQ_NONE;
	182	}
	183	if (status) {
	184	/* Ack only those interrupts which are not masked */
	185	status &= (~mask);
	186	ret = tps65090_write(tps65090->dev,
	187	TPS65090_INT_STS + i, status);
	188	if (ret < 0) {
	189	dev_err(tps65090->dev,
	190	"failed to write interrupt status\n");
	191	return IRQ_NONE;
	192	}
	193	acks \|= (status << (i * 8));
	194	}
	195	}
	196
	197	for_each_set_bit(i, &acks, ARRAY_SIZE(tps65090_irqs))
	198	handle_nested_irq(tps65090->irq_base + i);
	199	return acks ? IRQ_HANDLED : IRQ_NONE;
	200	}
	201
	202	static int __devinit tps65090_irq_init(struct tps65090 *tps65090, int irq,
	203	int irq_base)
	204	{
	205	int i, ret;
	206
	207	if (!irq_base) {
	208	dev_err(tps65090->dev, "IRQ base not set\n");
	209	return -EINVAL;
	210	}
	211
	212	mutex_init(&tps65090->irq_lock);
	213
	214	for (i = 0; i < NUM_INT_REG; i++)
	215	tps65090_write(tps65090->dev, TPS65090_INT_MSK + i, 0xFF);
	216
	217	for (i = 0; i < NUM_INT_REG; i++)
	218	tps65090_write(tps65090->dev, TPS65090_INT_STS + i, 0xff);
	219
	220	tps65090->irq_base = irq_base;
	221	tps65090->irq_chip.name = "tps65090";
	222	tps65090->irq_chip.irq_mask = tps65090_irq_mask;
	223	tps65090->irq_chip.irq_unmask = tps65090_irq_unmask;
	224	tps65090->irq_chip.irq_bus_lock = tps65090_irq_lock;
	225	tps65090->irq_chip.irq_bus_sync_unlock = tps65090_irq_sync_unlock;
	226
	227	for (i = 0; i < ARRAY_SIZE(tps65090_irqs); i++) {
	228	int __irq = i + tps65090->irq_base;
	229	irq_set_chip_data(__irq, tps65090);
	230	irq_set_chip_and_handler(__irq, &tps65090->irq_chip,
	231	handle_simple_irq);
	232	irq_set_nested_thread(__irq, 1);
	233	#ifdef CONFIG_ARM
	234	set_irq_flags(__irq, IRQF_VALID);
	235	#endif
	236	}
	237
	238	ret = request_threaded_irq(irq, NULL, tps65090_irq, IRQF_ONESHOT,
	239	"tps65090", tps65090);
	240	if (!ret) {
	241	device_init_wakeup(tps65090->dev, 1);
	242	enable_irq_wake(irq);
	243	}
	244
	245	return ret;
	246	}
	247
	248	static bool is_volatile_reg(struct device *dev, unsigned int reg)
	249	{
	250	if ((reg == TPS65090_INT_STS) \|\| (reg == TPS65090_INT_STS))
	251	return true;
	252	else
	253	return false;
	254	}
	255
	256	static const struct regmap_config tps65090_regmap_config = {
	257	.reg_bits = 8,
	258	.val_bits = 8,
	259	.max_register = TOTAL_NUM_REG,
	260	.num_reg_defaults_raw = TOTAL_NUM_REG,
	261	.cache_type = REGCACHE_RBTREE,
	262	.volatile_reg = is_volatile_reg,
	263	};
	264
	265	static int __devinit tps65090_i2c_probe(struct i2c_client *client,
	266	const struct i2c_device_id *id)
	267	{
	268	struct tps65090_platform_data *pdata = client->dev.platform_data;
	269	struct tps65090 *tps65090;
	270	int ret;
	271
	272	if (!pdata) {
	273	dev_err(&client->dev, "tps65090 requires platform data\n");
	274	return -EINVAL;
	275	}
	276
	277	tps65090 = devm_kzalloc(&client->dev, sizeof(struct tps65090),
	278	GFP_KERNEL);
	279	if (tps65090 == NULL)
	280	return -ENOMEM;
	281
	282	tps65090->client = client;
	283	tps65090->dev = &client->dev;
	284	i2c_set_clientdata(client, tps65090);
	285
	286	mutex_init(&tps65090->lock);
	287
	288	if (client->irq) {
	289	ret = tps65090_irq_init(tps65090, client->irq, pdata->irq_base);
	290	if (ret) {
	291	dev_err(&client->dev, "IRQ init failed with err: %d\n",
	292	ret);
	293	goto err_exit;
	294	}
	295	}
	296
	297	tps65090->rmap = regmap_init_i2c(tps65090->client,
	298	&tps65090_regmap_config);
	299	if (IS_ERR(tps65090->rmap)) {
	300	dev_err(&client->dev, "regmap_init failed with err: %ld\n",
	301	PTR_ERR(tps65090->rmap));
	302	goto err_irq_exit;
	303	};
	304
	305	ret = mfd_add_devices(tps65090->dev, -1, tps65090s,
	306	ARRAY_SIZE(tps65090s), NULL, 0);
	307	if (ret) {
	308	dev_err(&client->dev, "add mfd devices failed with err: %d\n",
	309	ret);
	310	goto err_regmap_exit;
	311	}
	312
	313	return 0;
	314
	315	err_regmap_exit:
	316	regmap_exit(tps65090->rmap);
	317
	318	err_irq_exit:
	319	if (client->irq)
	320	free_irq(client->irq, tps65090);
	321	err_exit:
	322	return ret;
	323	}
	324
	325	static int __devexit tps65090_i2c_remove(struct i2c_client *client)
	326	{
	327	struct tps65090 *tps65090 = i2c_get_clientdata(client);
	328
	329	mfd_remove_devices(tps65090->dev);
	330	regmap_exit(tps65090->rmap);
	331	if (client->irq)
	332	free_irq(client->irq, tps65090);
	333
	334	return 0;
	335	}
	336
	337	#ifdef CONFIG_PM
	338	static int tps65090_i2c_suspend(struct i2c_client *client, pm_message_t state)
	339	{
	340	if (client->irq)
	341	disable_irq(client->irq);
	342	return 0;
	343	}
	344
	345	static int tps65090_i2c_resume(struct i2c_client *client)
	346	{
	347	if (client->irq)
	348	enable_irq(client->irq);
	349	return 0;
	350	}
	351	#endif
	352
	353	static const struct i2c_device_id tps65090_id_table[] = {
	354	{ "tps65090", 0 },
	355	{ },
	356	};
	357	MODULE_DEVICE_TABLE(i2c, tps65090_id_table);
	358
	359	static struct i2c_driver tps65090_driver = {
	360	.driver = {
	361	.name = "tps65090",
	362	.owner = THIS_MODULE,
	363	},
	364	.probe = tps65090_i2c_probe,
	365	.remove = __devexit_p(tps65090_i2c_remove),
	366	#ifdef CONFIG_PM
	367	.suspend = tps65090_i2c_suspend,
	368	.resume = tps65090_i2c_resume,
	369	#endif
	370	.id_table = tps65090_id_table,
	371	};
	372
	373	static int __init tps65090_init(void)
	374	{
	375	return i2c_add_driver(&tps65090_driver);
	376	}
	377	subsys_initcall(tps65090_init);
	378
	379	static void __exit tps65090_exit(void)
	380	{
	381	i2c_del_driver(&tps65090_driver);
	382	}
	383	module_exit(tps65090_exit);
	384
	385	MODULE_DESCRIPTION("TPS65090 core driver");
	386	MODULE_AUTHOR("Venu Byravarasu <vbyravarasu@nvidia.com>");
	387	MODULE_LICENSE("GPL v2");