2 * tps65910.c -- TI TPS6591x
4 * Copyright 2010 Texas Instruments Inc.
6 * Author: Graeme Gregory <gg@slimlogic.co.uk>
7 * Author: Jorge Eduardo Candelaria <jedu@slimlogic.co.uk>
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by the
11 * Free Software Foundation; either version 2 of the License, or (at your
12 * option) any later version.
16 #include <linux/module.h>
17 #include <linux/moduleparam.h>
18 #include <linux/init.h>
19 #include <linux/slab.h>
20 #include <linux/i2c.h>
21 #include <linux/gpio.h>
22 #include <linux/mfd/core.h>
23 #include <linux/mfd/tps65910.h>
25 struct tps65910 *g_tps65910;
27 static struct mfd_cell tps65910s[] = {
29 .name = "tps65910-pmic",
32 .name = "tps65910-rtc",
35 .name = "tps65910-power",
39 #define TPS65910_SPEED 200 * 1000
41 static int tps65910_i2c_read(struct tps65910 *tps65910, u8 reg,
42 int bytes, void *dest)
44 struct i2c_client *i2c = tps65910->i2c_client;
45 struct i2c_msg xfer[2];
50 xfer[0].addr = i2c->addr;
54 xfer[0].scl_rate = TPS65910_SPEED;
57 xfer[1].addr = i2c->addr;
58 xfer[1].flags = I2C_M_RD;
61 xfer[1].scl_rate = TPS65910_SPEED;
63 ret = i2c_transfer(i2c->adapter, xfer, 2);
64 //for(i=0;i<bytes;i++)
65 //printk("%s:reg=0x%x,value=0x%x\n",__func__,reg+i,*(u8 *)dest++);
74 static int tps65910_i2c_write(struct tps65910 *tps65910, u8 reg,
77 struct i2c_client *i2c = tps65910->i2c_client;
78 /* we add 1 byte for device register */
79 u8 msg[TPS65910_MAX_REGISTER + 1];
83 if (bytes > TPS65910_MAX_REGISTER)
87 memcpy(&msg[1], src, bytes);
89 //for(i=0;i<bytes;i++)
90 //printk("%s:reg=0x%x,value=0x%x\n",__func__,reg+i,msg[i+1]);
92 ret = i2c_master_send(i2c, msg, bytes + 1);
101 static inline int tps65910_read(struct tps65910 *tps65910, u8 reg)
106 err = tps65910->read(tps65910, reg, 1, &val);
113 static inline int tps65910_write(struct tps65910 *tps65910, u8 reg, u8 val)
115 return tps65910->write(tps65910, reg, 1, &val);
118 int tps65910_reg_read(struct tps65910 *tps65910, u8 reg)
122 mutex_lock(&tps65910->io_mutex);
124 data = tps65910_read(tps65910, reg);
126 dev_err(tps65910->dev, "Read from reg 0x%x failed\n", reg);
128 mutex_unlock(&tps65910->io_mutex);
131 EXPORT_SYMBOL_GPL(tps65910_reg_read);
133 int tps65910_reg_write(struct tps65910 *tps65910, u8 reg, u8 val)
137 mutex_lock(&tps65910->io_mutex);
139 err = tps65910_write(tps65910, reg, val);
141 dev_err(tps65910->dev, "Write for reg 0x%x failed\n", reg);
143 mutex_unlock(&tps65910->io_mutex);
146 EXPORT_SYMBOL_GPL(tps65910_reg_write);
149 * tps65910_bulk_read: Read multiple tps65910 registers
151 * @tps65910: Device to read from
152 * @reg: First register
153 * @count: Number of registers
154 * @buf: Buffer to fill.
156 int tps65910_bulk_read(struct tps65910 *tps65910, u8 reg,
161 mutex_lock(&tps65910->io_mutex);
163 ret = tps65910->read(tps65910, reg, count, buf);
165 mutex_unlock(&tps65910->io_mutex);
169 EXPORT_SYMBOL_GPL(tps65910_bulk_read);
171 int tps65910_bulk_write(struct tps65910 *tps65910, u8 reg,
176 mutex_lock(&tps65910->io_mutex);
178 ret = tps65910->write(tps65910, reg, count, buf);
180 mutex_unlock(&tps65910->io_mutex);
184 EXPORT_SYMBOL_GPL(tps65910_bulk_write);
189 int tps65910_set_bits(struct tps65910 *tps65910, u8 reg, u8 mask)
194 mutex_lock(&tps65910->io_mutex);
195 err = tps65910_i2c_read(tps65910, reg, 1, &data);
197 dev_err(tps65910->dev, "%s:read from reg %x failed\n", __func__,reg);
202 err = tps65910_i2c_write(tps65910, reg, 1, &data);
204 dev_err(tps65910->dev, "%s:write to reg %x failed\n", __func__,reg);
207 mutex_unlock(&tps65910->io_mutex);
210 EXPORT_SYMBOL_GPL(tps65910_set_bits);
212 int tps65910_clear_bits(struct tps65910 *tps65910, u8 reg, u8 mask)
217 mutex_lock(&tps65910->io_mutex);
218 err = tps65910_i2c_read(tps65910, reg, 1, &data);
220 dev_err(tps65910->dev, "read from reg %x failed\n", reg);
225 err = tps65910_i2c_write(tps65910, reg, 1, &data);
227 dev_err(tps65910->dev, "write to reg %x failed\n", reg);
230 mutex_unlock(&tps65910->io_mutex);
233 EXPORT_SYMBOL_GPL(tps65910_clear_bits);
235 static int tps65910_i2c_probe(struct i2c_client *i2c,
236 const struct i2c_device_id *id)
238 struct tps65910 *tps65910;
239 struct tps65910_board *pmic_plat_data;
240 struct tps65910_platform_data *init_data;
243 pmic_plat_data = dev_get_platdata(&i2c->dev);
247 init_data = kzalloc(sizeof(struct tps65910_platform_data), GFP_KERNEL);
248 if (init_data == NULL)
251 init_data->irq = pmic_plat_data->irq;
252 init_data->irq_base = pmic_plat_data->irq_base;
254 tps65910 = kzalloc(sizeof(struct tps65910), GFP_KERNEL);
255 if (tps65910 == NULL)
258 i2c_set_clientdata(i2c, tps65910);
259 tps65910->dev = &i2c->dev;
260 tps65910->i2c_client = i2c;
261 tps65910->id = id->driver_data;
262 tps65910->read = tps65910_i2c_read;
263 tps65910->write = tps65910_i2c_write;
264 mutex_init(&tps65910->io_mutex);
266 ret = mfd_add_devices(tps65910->dev, -1,
267 tps65910s, ARRAY_SIZE(tps65910s),
272 ret = tps65910_reg_read(tps65910,0x22);
273 if ((ret < 0) || (ret == 0xff)){
274 printk("The device is not tps65910\n");
278 g_tps65910 = tps65910;
280 if (pmic_plat_data && pmic_plat_data->pre_init) {
281 ret = pmic_plat_data->pre_init(tps65910);
283 dev_err(tps65910->dev, "pre_init() failed: %d\n", ret);
288 tps65910_gpio_init(tps65910, pmic_plat_data->gpio_base);
290 ret = tps65910_irq_init(tps65910, init_data->irq, init_data);
294 if (pmic_plat_data && pmic_plat_data->post_init) {
295 ret = pmic_plat_data->post_init(tps65910);
297 dev_err(tps65910->dev, "post_init() failed: %d\n", ret);
302 printk("%s:irq=%d,irq_base=%d,gpio_base=%d\n",__func__,init_data->irq,init_data->irq_base,pmic_plat_data->gpio_base);
306 mfd_remove_devices(tps65910->dev);
312 int tps65910_device_shutdown(void)
316 struct tps65910 *tps65910 = g_tps65910;
318 printk("%s\n",__func__);
320 val = tps65910_reg_read(tps65910, TPS65910_DEVCTRL);
322 printk(KERN_ERR "Unable to read TPS65910_REG_DCDCCTRL reg\n");
326 val |= DEVCTRL_DEV_OFF_MASK;
327 val &= ~DEVCTRL_CK32K_CTRL_MASK; //keep rtc
328 err = tps65910_reg_write(tps65910, TPS65910_DEVCTRL, val);
330 printk(KERN_ERR "Unable to read TPS65910 Reg at offset 0x%x= \
331 \n", TPS65910_REG_VDIG1);
337 EXPORT_SYMBOL_GPL(tps65910_device_shutdown);
341 static int tps65910_i2c_remove(struct i2c_client *i2c)
343 struct tps65910 *tps65910 = i2c_get_clientdata(i2c);
345 mfd_remove_devices(tps65910->dev);
351 static const struct i2c_device_id tps65910_i2c_id[] = {
352 { "tps65910", TPS65910 },
353 { "tps65911", TPS65911 },
356 MODULE_DEVICE_TABLE(i2c, tps65910_i2c_id);
359 static struct i2c_driver tps65910_i2c_driver = {
362 .owner = THIS_MODULE,
364 .probe = tps65910_i2c_probe,
365 .remove = tps65910_i2c_remove,
366 .id_table = tps65910_i2c_id,
369 static int __init tps65910_i2c_init(void)
371 return i2c_add_driver(&tps65910_i2c_driver);
373 /* init early so consumer devices can complete system boot */
374 subsys_initcall_sync(tps65910_i2c_init);
376 static void __exit tps65910_i2c_exit(void)
378 i2c_del_driver(&tps65910_i2c_driver);
380 module_exit(tps65910_i2c_exit);
382 MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>");
383 MODULE_AUTHOR("Jorge Eduardo Candelaria <jedu@slimlogic.co.uk>");
384 MODULE_DESCRIPTION("TPS6591x chip family multi-function driver");
385 MODULE_LICENSE("GPL");