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Graeme Gregory27c67502011-05-02 16:19:46 -05001/*
2 * tps65910.c -- TI TPS6591x
3 *
4 * Copyright 2010 Texas Instruments Inc.
5 *
6 * Author: Graeme Gregory <gg@slimlogic.co.uk>
7 * Author: Jorge Eduardo Candelaria <jedu@slimlogic.co.uk>
8 *
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.
13 *
14 */
15
16#include <linux/module.h>
17#include <linux/moduleparam.h>
18#include <linux/init.h>
Laxman Dewangandc9913a2012-02-21 18:21:34 +053019#include <linux/err.h>
Graeme Gregory27c67502011-05-02 16:19:46 -050020#include <linux/slab.h>
21#include <linux/i2c.h>
Graeme Gregory27c67502011-05-02 16:19:46 -050022#include <linux/mfd/core.h>
Laxman Dewangandc9913a2012-02-21 18:21:34 +053023#include <linux/regmap.h>
Graeme Gregory27c67502011-05-02 16:19:46 -050024#include <linux/mfd/tps65910.h>
Rhyland Kleincd4209c2012-05-11 11:36:26 +020025#include <linux/of_device.h>
Graeme Gregory27c67502011-05-02 16:19:46 -050026
27static struct mfd_cell tps65910s[] = {
28 {
Laxman Dewangan32df9862012-05-11 15:07:44 +020029 .name = "tps65910-gpio",
30 },
31 {
Graeme Gregory27c67502011-05-02 16:19:46 -050032 .name = "tps65910-pmic",
33 },
34 {
35 .name = "tps65910-rtc",
36 },
37 {
38 .name = "tps65910-power",
39 },
40};
41
42
Laxman Dewangandc9913a2012-02-21 18:21:34 +053043static bool is_volatile_reg(struct device *dev, unsigned int reg)
44{
45 struct tps65910 *tps65910 = dev_get_drvdata(dev);
46
47 /*
48 * Caching all regulator registers.
49 * All regualator register address range is same for
50 * TPS65910 and TPS65911
51 */
52 if ((reg >= TPS65910_VIO) && (reg <= TPS65910_VDAC)) {
53 /* Check for non-existing register */
54 if (tps65910_chip_id(tps65910) == TPS65910)
55 if ((reg == TPS65911_VDDCTRL_OP) ||
56 (reg == TPS65911_VDDCTRL_SR))
57 return true;
58 return false;
59 }
60 return true;
61}
62
Laxman Dewangan39ecb032012-03-07 18:46:05 +053063static const struct regmap_config tps65910_regmap_config = {
Laxman Dewangandc9913a2012-02-21 18:21:34 +053064 .reg_bits = 8,
65 .val_bits = 8,
66 .volatile_reg = is_volatile_reg,
Laxman Dewangan3bf6bf92012-05-09 18:40:54 +053067 .max_register = TPS65910_MAX_REGISTER - 1,
Laxman Dewangandc9913a2012-02-21 18:21:34 +053068 .cache_type = REGCACHE_RBTREE,
69};
70
Johan Hovoldd02e83c2012-07-11 15:44:33 +020071static int __devinit tps65910_ck32k_init(struct tps65910 *tps65910,
Johan Hovold712db992012-06-28 12:20:21 +020072 struct tps65910_board *pmic_pdata)
73{
Johan Hovold712db992012-06-28 12:20:21 +020074 int ret;
75
Johan Hovoldd02e83c2012-07-11 15:44:33 +020076 if (!pmic_pdata->en_ck32k_xtal)
77 return 0;
78
79 ret = tps65910_reg_clear_bits(tps65910, TPS65910_DEVCTRL,
Johan Hovold712db992012-06-28 12:20:21 +020080 DEVCTRL_CK32K_CTRL_MASK);
Johan Hovoldd02e83c2012-07-11 15:44:33 +020081 if (ret < 0) {
82 dev_err(tps65910->dev, "clear ck32k_ctrl failed: %d\n", ret);
83 return ret;
Johan Hovold712db992012-06-28 12:20:21 +020084 }
85
86 return 0;
87}
88
Mark Brown63745d42012-05-07 10:03:19 +010089static int __devinit tps65910_sleepinit(struct tps65910 *tps65910,
Laxman Dewangan201cf052012-04-18 12:13:51 +020090 struct tps65910_board *pmic_pdata)
91{
92 struct device *dev = NULL;
93 int ret = 0;
94
95 dev = tps65910->dev;
96
97 if (!pmic_pdata->en_dev_slp)
98 return 0;
99
100 /* enabling SLEEP device state */
Rhyland Klein3f7e8272012-05-08 11:42:38 -0700101 ret = tps65910_reg_set_bits(tps65910, TPS65910_DEVCTRL,
Laxman Dewangan201cf052012-04-18 12:13:51 +0200102 DEVCTRL_DEV_SLP_MASK);
103 if (ret < 0) {
104 dev_err(dev, "set dev_slp failed: %d\n", ret);
105 goto err_sleep_init;
106 }
107
108 /* Return if there is no sleep keepon data. */
109 if (!pmic_pdata->slp_keepon)
110 return 0;
111
112 if (pmic_pdata->slp_keepon->therm_keepon) {
Rhyland Klein3f7e8272012-05-08 11:42:38 -0700113 ret = tps65910_reg_set_bits(tps65910,
114 TPS65910_SLEEP_KEEP_RES_ON,
Laxman Dewangan201cf052012-04-18 12:13:51 +0200115 SLEEP_KEEP_RES_ON_THERM_KEEPON_MASK);
116 if (ret < 0) {
117 dev_err(dev, "set therm_keepon failed: %d\n", ret);
118 goto disable_dev_slp;
119 }
120 }
121
122 if (pmic_pdata->slp_keepon->clkout32k_keepon) {
Rhyland Klein3f7e8272012-05-08 11:42:38 -0700123 ret = tps65910_reg_set_bits(tps65910,
124 TPS65910_SLEEP_KEEP_RES_ON,
Laxman Dewangan201cf052012-04-18 12:13:51 +0200125 SLEEP_KEEP_RES_ON_CLKOUT32K_KEEPON_MASK);
126 if (ret < 0) {
127 dev_err(dev, "set clkout32k_keepon failed: %d\n", ret);
128 goto disable_dev_slp;
129 }
130 }
131
132 if (pmic_pdata->slp_keepon->i2chs_keepon) {
Rhyland Klein3f7e8272012-05-08 11:42:38 -0700133 ret = tps65910_reg_set_bits(tps65910,
134 TPS65910_SLEEP_KEEP_RES_ON,
Laxman Dewangan201cf052012-04-18 12:13:51 +0200135 SLEEP_KEEP_RES_ON_I2CHS_KEEPON_MASK);
136 if (ret < 0) {
137 dev_err(dev, "set i2chs_keepon failed: %d\n", ret);
138 goto disable_dev_slp;
139 }
140 }
141
142 return 0;
143
144disable_dev_slp:
Rhyland Klein3f7e8272012-05-08 11:42:38 -0700145 tps65910_reg_clear_bits(tps65910, TPS65910_DEVCTRL,
146 DEVCTRL_DEV_SLP_MASK);
Laxman Dewangan201cf052012-04-18 12:13:51 +0200147
148err_sleep_init:
149 return ret;
150}
151
Rhyland Kleincd4209c2012-05-11 11:36:26 +0200152#ifdef CONFIG_OF
153static struct of_device_id tps65910_of_match[] = {
154 { .compatible = "ti,tps65910", .data = (void *)TPS65910},
155 { .compatible = "ti,tps65911", .data = (void *)TPS65911},
156 { },
157};
158MODULE_DEVICE_TABLE(of, tps65910_of_match);
159
160static struct tps65910_board *tps65910_parse_dt(struct i2c_client *client,
161 int *chip_id)
162{
163 struct device_node *np = client->dev.of_node;
164 struct tps65910_board *board_info;
165 unsigned int prop;
166 const struct of_device_id *match;
Rhyland Kleincd4209c2012-05-11 11:36:26 +0200167 int ret = 0;
Rhyland Kleincd4209c2012-05-11 11:36:26 +0200168
169 match = of_match_device(tps65910_of_match, &client->dev);
170 if (!match) {
171 dev_err(&client->dev, "Failed to find matching dt id\n");
172 return NULL;
173 }
174
175 *chip_id = (int)match->data;
176
177 board_info = devm_kzalloc(&client->dev, sizeof(*board_info),
178 GFP_KERNEL);
179 if (!board_info) {
180 dev_err(&client->dev, "Failed to allocate pdata\n");
181 return NULL;
182 }
183
184 ret = of_property_read_u32(np, "ti,vmbch-threshold", &prop);
185 if (!ret)
186 board_info->vmbch_threshold = prop;
187 else if (*chip_id == TPS65911)
188 dev_warn(&client->dev, "VMBCH-Threshold not specified");
189
190 ret = of_property_read_u32(np, "ti,vmbch2-threshold", &prop);
191 if (!ret)
192 board_info->vmbch2_threshold = prop;
193 else if (*chip_id == TPS65911)
194 dev_warn(&client->dev, "VMBCH2-Threshold not specified");
195
Johan Hovoldbcc1dd42012-06-28 12:20:22 +0200196 prop = of_property_read_bool(np, "ti,en-ck32k-xtal");
197 board_info->en_ck32k_xtal = prop;
198
Rhyland Kleincd4209c2012-05-11 11:36:26 +0200199 board_info->irq = client->irq;
200 board_info->irq_base = -1;
Rhyland Kleincd4209c2012-05-11 11:36:26 +0200201
202 return board_info;
203}
204#else
Samuel Ortiz7f65f742012-05-11 15:10:28 +0200205static inline
206struct tps65910_board *tps65910_parse_dt(struct i2c_client *client,
207 int *chip_id)
Rhyland Kleincd4209c2012-05-11 11:36:26 +0200208{
209 return NULL;
210}
211#endif
Laxman Dewangan201cf052012-04-18 12:13:51 +0200212
Mark Brown63745d42012-05-07 10:03:19 +0100213static __devinit int tps65910_i2c_probe(struct i2c_client *i2c,
214 const struct i2c_device_id *id)
Graeme Gregory27c67502011-05-02 16:19:46 -0500215{
216 struct tps65910 *tps65910;
Graeme Gregory2537df72011-05-02 16:19:52 -0500217 struct tps65910_board *pmic_plat_data;
Laxman Dewangancb8d8652012-05-19 02:01:41 +0530218 struct tps65910_board *of_pmic_plat_data = NULL;
Graeme Gregorye3471bd2011-05-02 16:20:04 -0500219 struct tps65910_platform_data *init_data;
Graeme Gregory27c67502011-05-02 16:19:46 -0500220 int ret = 0;
Rhyland Kleincd4209c2012-05-11 11:36:26 +0200221 int chip_id = id->driver_data;
Graeme Gregory27c67502011-05-02 16:19:46 -0500222
Graeme Gregory2537df72011-05-02 16:19:52 -0500223 pmic_plat_data = dev_get_platdata(&i2c->dev);
Rhyland Kleincd4209c2012-05-11 11:36:26 +0200224
Laxman Dewangancb8d8652012-05-19 02:01:41 +0530225 if (!pmic_plat_data && i2c->dev.of_node) {
Rhyland Kleincd4209c2012-05-11 11:36:26 +0200226 pmic_plat_data = tps65910_parse_dt(i2c, &chip_id);
Laxman Dewangancb8d8652012-05-19 02:01:41 +0530227 of_pmic_plat_data = pmic_plat_data;
228 }
Rhyland Kleincd4209c2012-05-11 11:36:26 +0200229
Graeme Gregory2537df72011-05-02 16:19:52 -0500230 if (!pmic_plat_data)
231 return -EINVAL;
232
Laxman Dewangan63fe7de2012-05-11 12:36:57 +0200233 init_data = devm_kzalloc(&i2c->dev, sizeof(*init_data), GFP_KERNEL);
Graeme Gregorye3471bd2011-05-02 16:20:04 -0500234 if (init_data == NULL)
235 return -ENOMEM;
236
Laxman Dewangan63fe7de2012-05-11 12:36:57 +0200237 tps65910 = devm_kzalloc(&i2c->dev, sizeof(*tps65910), GFP_KERNEL);
238 if (tps65910 == NULL)
Graeme Gregory27c67502011-05-02 16:19:46 -0500239 return -ENOMEM;
240
Laxman Dewangancb8d8652012-05-19 02:01:41 +0530241 tps65910->of_plat_data = of_pmic_plat_data;
Graeme Gregory27c67502011-05-02 16:19:46 -0500242 i2c_set_clientdata(i2c, tps65910);
243 tps65910->dev = &i2c->dev;
244 tps65910->i2c_client = i2c;
Rhyland Kleincd4209c2012-05-11 11:36:26 +0200245 tps65910->id = chip_id;
Graeme Gregory27c67502011-05-02 16:19:46 -0500246 mutex_init(&tps65910->io_mutex);
247
Laxman Dewangan63fe7de2012-05-11 12:36:57 +0200248 tps65910->regmap = devm_regmap_init_i2c(i2c, &tps65910_regmap_config);
Laxman Dewangandc9913a2012-02-21 18:21:34 +0530249 if (IS_ERR(tps65910->regmap)) {
250 ret = PTR_ERR(tps65910->regmap);
251 dev_err(&i2c->dev, "regmap initialization failed: %d\n", ret);
Laxman Dewangan63fe7de2012-05-11 12:36:57 +0200252 return ret;
Laxman Dewangandc9913a2012-02-21 18:21:34 +0530253 }
254
Graeme Gregory27c67502011-05-02 16:19:46 -0500255 ret = mfd_add_devices(tps65910->dev, -1,
256 tps65910s, ARRAY_SIZE(tps65910s),
Mark Brown0848c942012-09-11 15:16:36 +0800257 NULL, 0, NULL);
Laxman Dewangan63fe7de2012-05-11 12:36:57 +0200258 if (ret < 0) {
259 dev_err(&i2c->dev, "mfd_add_devices failed: %d\n", ret);
260 return ret;
261 }
Graeme Gregory27c67502011-05-02 16:19:46 -0500262
Jesper Juhlb1224cd2011-07-13 23:22:26 +0200263 init_data->irq = pmic_plat_data->irq;
Laxman Dewangan17731402012-01-18 20:19:16 +0530264 init_data->irq_base = pmic_plat_data->irq_base;
Jesper Juhlb1224cd2011-07-13 23:22:26 +0200265
Afzal Mohammed1e351a92011-12-14 16:05:35 +0530266 tps65910_irq_init(tps65910, init_data->irq, init_data);
Johan Hovoldd02e83c2012-07-11 15:44:33 +0200267 tps65910_ck32k_init(tps65910, pmic_plat_data);
Laxman Dewangan201cf052012-04-18 12:13:51 +0200268 tps65910_sleepinit(tps65910, pmic_plat_data);
269
Graeme Gregory27c67502011-05-02 16:19:46 -0500270 return ret;
271}
272
Mark Brown63745d42012-05-07 10:03:19 +0100273static __devexit int tps65910_i2c_remove(struct i2c_client *i2c)
Graeme Gregory27c67502011-05-02 16:19:46 -0500274{
275 struct tps65910 *tps65910 = i2c_get_clientdata(i2c);
276
Mark Brownec2328c2011-06-20 11:47:55 +0100277 tps65910_irq_exit(tps65910);
Afzal Mohammed1e351a92011-12-14 16:05:35 +0530278 mfd_remove_devices(tps65910->dev);
Graeme Gregory27c67502011-05-02 16:19:46 -0500279
280 return 0;
281}
282
283static const struct i2c_device_id tps65910_i2c_id[] = {
Jorge Eduardo Candelaria79557052011-05-16 18:34:59 -0500284 { "tps65910", TPS65910 },
285 { "tps65911", TPS65911 },
Graeme Gregory27c67502011-05-02 16:19:46 -0500286 { }
287};
288MODULE_DEVICE_TABLE(i2c, tps65910_i2c_id);
289
290
291static struct i2c_driver tps65910_i2c_driver = {
292 .driver = {
293 .name = "tps65910",
294 .owner = THIS_MODULE,
Rhyland Kleincd4209c2012-05-11 11:36:26 +0200295 .of_match_table = of_match_ptr(tps65910_of_match),
Graeme Gregory27c67502011-05-02 16:19:46 -0500296 },
297 .probe = tps65910_i2c_probe,
Mark Brown63745d42012-05-07 10:03:19 +0100298 .remove = __devexit_p(tps65910_i2c_remove),
Graeme Gregory27c67502011-05-02 16:19:46 -0500299 .id_table = tps65910_i2c_id,
300};
301
302static int __init tps65910_i2c_init(void)
303{
304 return i2c_add_driver(&tps65910_i2c_driver);
305}
306/* init early so consumer devices can complete system boot */
307subsys_initcall(tps65910_i2c_init);
308
309static void __exit tps65910_i2c_exit(void)
310{
311 i2c_del_driver(&tps65910_i2c_driver);
312}
313module_exit(tps65910_i2c_exit);
314
315MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>");
316MODULE_AUTHOR("Jorge Eduardo Candelaria <jedu@slimlogic.co.uk>");
317MODULE_DESCRIPTION("TPS6591x chip family multi-function driver");
318MODULE_LICENSE("GPL");