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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
Venu Byravarasu5863eab2012-09-21 16:25:36 +053027static struct resource rtc_resources[] = {
28 {
29 .start = TPS65910_IRQ_RTC_ALARM,
30 .end = TPS65910_IRQ_RTC_ALARM,
31 .flags = IORESOURCE_IRQ,
32 }
33};
34
Graeme Gregory27c67502011-05-02 16:19:46 -050035static struct mfd_cell tps65910s[] = {
36 {
Laxman Dewangan32df9862012-05-11 15:07:44 +020037 .name = "tps65910-gpio",
38 },
39 {
Graeme Gregory27c67502011-05-02 16:19:46 -050040 .name = "tps65910-pmic",
41 },
42 {
43 .name = "tps65910-rtc",
Venu Byravarasu5863eab2012-09-21 16:25:36 +053044 .num_resources = ARRAY_SIZE(rtc_resources),
45 .resources = &rtc_resources[0],
Graeme Gregory27c67502011-05-02 16:19:46 -050046 },
47 {
48 .name = "tps65910-power",
49 },
50};
51
52
Laxman Dewangandc9913a2012-02-21 18:21:34 +053053static bool is_volatile_reg(struct device *dev, unsigned int reg)
54{
55 struct tps65910 *tps65910 = dev_get_drvdata(dev);
56
57 /*
58 * Caching all regulator registers.
59 * All regualator register address range is same for
60 * TPS65910 and TPS65911
61 */
62 if ((reg >= TPS65910_VIO) && (reg <= TPS65910_VDAC)) {
63 /* Check for non-existing register */
64 if (tps65910_chip_id(tps65910) == TPS65910)
65 if ((reg == TPS65911_VDDCTRL_OP) ||
66 (reg == TPS65911_VDDCTRL_SR))
67 return true;
68 return false;
69 }
70 return true;
71}
72
Laxman Dewangan39ecb032012-03-07 18:46:05 +053073static const struct regmap_config tps65910_regmap_config = {
Laxman Dewangandc9913a2012-02-21 18:21:34 +053074 .reg_bits = 8,
75 .val_bits = 8,
76 .volatile_reg = is_volatile_reg,
Laxman Dewangan3bf6bf92012-05-09 18:40:54 +053077 .max_register = TPS65910_MAX_REGISTER - 1,
Laxman Dewangandc9913a2012-02-21 18:21:34 +053078 .cache_type = REGCACHE_RBTREE,
79};
80
Johan Hovoldd02e83c2012-07-11 15:44:33 +020081static int __devinit tps65910_ck32k_init(struct tps65910 *tps65910,
Johan Hovold712db992012-06-28 12:20:21 +020082 struct tps65910_board *pmic_pdata)
83{
Johan Hovold712db992012-06-28 12:20:21 +020084 int ret;
85
Johan Hovoldd02e83c2012-07-11 15:44:33 +020086 if (!pmic_pdata->en_ck32k_xtal)
87 return 0;
88
89 ret = tps65910_reg_clear_bits(tps65910, TPS65910_DEVCTRL,
Johan Hovold712db992012-06-28 12:20:21 +020090 DEVCTRL_CK32K_CTRL_MASK);
Johan Hovoldd02e83c2012-07-11 15:44:33 +020091 if (ret < 0) {
92 dev_err(tps65910->dev, "clear ck32k_ctrl failed: %d\n", ret);
93 return ret;
Johan Hovold712db992012-06-28 12:20:21 +020094 }
95
96 return 0;
97}
98
Mark Brown63745d42012-05-07 10:03:19 +010099static int __devinit tps65910_sleepinit(struct tps65910 *tps65910,
Laxman Dewangan201cf052012-04-18 12:13:51 +0200100 struct tps65910_board *pmic_pdata)
101{
102 struct device *dev = NULL;
103 int ret = 0;
104
105 dev = tps65910->dev;
106
107 if (!pmic_pdata->en_dev_slp)
108 return 0;
109
110 /* enabling SLEEP device state */
Rhyland Klein3f7e8272012-05-08 11:42:38 -0700111 ret = tps65910_reg_set_bits(tps65910, TPS65910_DEVCTRL,
Laxman Dewangan201cf052012-04-18 12:13:51 +0200112 DEVCTRL_DEV_SLP_MASK);
113 if (ret < 0) {
114 dev_err(dev, "set dev_slp failed: %d\n", ret);
115 goto err_sleep_init;
116 }
117
118 /* Return if there is no sleep keepon data. */
119 if (!pmic_pdata->slp_keepon)
120 return 0;
121
122 if (pmic_pdata->slp_keepon->therm_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_THERM_KEEPON_MASK);
126 if (ret < 0) {
127 dev_err(dev, "set therm_keepon failed: %d\n", ret);
128 goto disable_dev_slp;
129 }
130 }
131
132 if (pmic_pdata->slp_keepon->clkout32k_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_CLKOUT32K_KEEPON_MASK);
136 if (ret < 0) {
137 dev_err(dev, "set clkout32k_keepon failed: %d\n", ret);
138 goto disable_dev_slp;
139 }
140 }
141
142 if (pmic_pdata->slp_keepon->i2chs_keepon) {
Rhyland Klein3f7e8272012-05-08 11:42:38 -0700143 ret = tps65910_reg_set_bits(tps65910,
144 TPS65910_SLEEP_KEEP_RES_ON,
Laxman Dewangan201cf052012-04-18 12:13:51 +0200145 SLEEP_KEEP_RES_ON_I2CHS_KEEPON_MASK);
146 if (ret < 0) {
147 dev_err(dev, "set i2chs_keepon failed: %d\n", ret);
148 goto disable_dev_slp;
149 }
150 }
151
152 return 0;
153
154disable_dev_slp:
Rhyland Klein3f7e8272012-05-08 11:42:38 -0700155 tps65910_reg_clear_bits(tps65910, TPS65910_DEVCTRL,
156 DEVCTRL_DEV_SLP_MASK);
Laxman Dewangan201cf052012-04-18 12:13:51 +0200157
158err_sleep_init:
159 return ret;
160}
161
Rhyland Kleincd4209c2012-05-11 11:36:26 +0200162#ifdef CONFIG_OF
163static struct of_device_id tps65910_of_match[] = {
164 { .compatible = "ti,tps65910", .data = (void *)TPS65910},
165 { .compatible = "ti,tps65911", .data = (void *)TPS65911},
166 { },
167};
168MODULE_DEVICE_TABLE(of, tps65910_of_match);
169
170static struct tps65910_board *tps65910_parse_dt(struct i2c_client *client,
171 int *chip_id)
172{
173 struct device_node *np = client->dev.of_node;
174 struct tps65910_board *board_info;
175 unsigned int prop;
176 const struct of_device_id *match;
Rhyland Kleincd4209c2012-05-11 11:36:26 +0200177 int ret = 0;
Rhyland Kleincd4209c2012-05-11 11:36:26 +0200178
179 match = of_match_device(tps65910_of_match, &client->dev);
180 if (!match) {
181 dev_err(&client->dev, "Failed to find matching dt id\n");
182 return NULL;
183 }
184
185 *chip_id = (int)match->data;
186
187 board_info = devm_kzalloc(&client->dev, sizeof(*board_info),
188 GFP_KERNEL);
189 if (!board_info) {
190 dev_err(&client->dev, "Failed to allocate pdata\n");
191 return NULL;
192 }
193
194 ret = of_property_read_u32(np, "ti,vmbch-threshold", &prop);
195 if (!ret)
196 board_info->vmbch_threshold = prop;
197 else if (*chip_id == TPS65911)
198 dev_warn(&client->dev, "VMBCH-Threshold not specified");
199
200 ret = of_property_read_u32(np, "ti,vmbch2-threshold", &prop);
201 if (!ret)
202 board_info->vmbch2_threshold = prop;
203 else if (*chip_id == TPS65911)
204 dev_warn(&client->dev, "VMBCH2-Threshold not specified");
205
Johan Hovoldbcc1dd42012-06-28 12:20:22 +0200206 prop = of_property_read_bool(np, "ti,en-ck32k-xtal");
207 board_info->en_ck32k_xtal = prop;
208
Rhyland Kleincd4209c2012-05-11 11:36:26 +0200209 board_info->irq = client->irq;
210 board_info->irq_base = -1;
Bill Huangb079fa722012-08-19 18:07:56 -0700211 board_info->pm_off = of_property_read_bool(np,
212 "ti,system-power-controller");
Rhyland Kleincd4209c2012-05-11 11:36:26 +0200213
214 return board_info;
215}
216#else
Samuel Ortiz7f65f742012-05-11 15:10:28 +0200217static inline
218struct tps65910_board *tps65910_parse_dt(struct i2c_client *client,
219 int *chip_id)
Rhyland Kleincd4209c2012-05-11 11:36:26 +0200220{
221 return NULL;
222}
223#endif
Laxman Dewangan201cf052012-04-18 12:13:51 +0200224
Bill Huangb079fa722012-08-19 18:07:56 -0700225static struct i2c_client *tps65910_i2c_client;
226static void tps65910_power_off(void)
227{
228 struct tps65910 *tps65910;
229
230 tps65910 = dev_get_drvdata(&tps65910_i2c_client->dev);
231
232 if (tps65910_reg_set_bits(tps65910, TPS65910_DEVCTRL,
233 DEVCTRL_PWR_OFF_MASK) < 0)
234 return;
235
236 tps65910_reg_clear_bits(tps65910, TPS65910_DEVCTRL,
237 DEVCTRL_DEV_ON_MASK);
238}
239
Mark Brown63745d42012-05-07 10:03:19 +0100240static __devinit int tps65910_i2c_probe(struct i2c_client *i2c,
241 const struct i2c_device_id *id)
Graeme Gregory27c67502011-05-02 16:19:46 -0500242{
243 struct tps65910 *tps65910;
Graeme Gregory2537df72011-05-02 16:19:52 -0500244 struct tps65910_board *pmic_plat_data;
Laxman Dewangancb8d8652012-05-19 02:01:41 +0530245 struct tps65910_board *of_pmic_plat_data = NULL;
Graeme Gregorye3471bd2011-05-02 16:20:04 -0500246 struct tps65910_platform_data *init_data;
Graeme Gregory27c67502011-05-02 16:19:46 -0500247 int ret = 0;
Rhyland Kleincd4209c2012-05-11 11:36:26 +0200248 int chip_id = id->driver_data;
Graeme Gregory27c67502011-05-02 16:19:46 -0500249
Graeme Gregory2537df72011-05-02 16:19:52 -0500250 pmic_plat_data = dev_get_platdata(&i2c->dev);
Rhyland Kleincd4209c2012-05-11 11:36:26 +0200251
Laxman Dewangancb8d8652012-05-19 02:01:41 +0530252 if (!pmic_plat_data && i2c->dev.of_node) {
Rhyland Kleincd4209c2012-05-11 11:36:26 +0200253 pmic_plat_data = tps65910_parse_dt(i2c, &chip_id);
Laxman Dewangancb8d8652012-05-19 02:01:41 +0530254 of_pmic_plat_data = pmic_plat_data;
255 }
Rhyland Kleincd4209c2012-05-11 11:36:26 +0200256
Graeme Gregory2537df72011-05-02 16:19:52 -0500257 if (!pmic_plat_data)
258 return -EINVAL;
259
Laxman Dewangan63fe7de2012-05-11 12:36:57 +0200260 init_data = devm_kzalloc(&i2c->dev, sizeof(*init_data), GFP_KERNEL);
Graeme Gregorye3471bd2011-05-02 16:20:04 -0500261 if (init_data == NULL)
262 return -ENOMEM;
263
Laxman Dewangan63fe7de2012-05-11 12:36:57 +0200264 tps65910 = devm_kzalloc(&i2c->dev, sizeof(*tps65910), GFP_KERNEL);
265 if (tps65910 == NULL)
Graeme Gregory27c67502011-05-02 16:19:46 -0500266 return -ENOMEM;
267
Laxman Dewangancb8d8652012-05-19 02:01:41 +0530268 tps65910->of_plat_data = of_pmic_plat_data;
Graeme Gregory27c67502011-05-02 16:19:46 -0500269 i2c_set_clientdata(i2c, tps65910);
270 tps65910->dev = &i2c->dev;
271 tps65910->i2c_client = i2c;
Rhyland Kleincd4209c2012-05-11 11:36:26 +0200272 tps65910->id = chip_id;
Graeme Gregory27c67502011-05-02 16:19:46 -0500273 mutex_init(&tps65910->io_mutex);
274
Laxman Dewangan63fe7de2012-05-11 12:36:57 +0200275 tps65910->regmap = devm_regmap_init_i2c(i2c, &tps65910_regmap_config);
Laxman Dewangandc9913a2012-02-21 18:21:34 +0530276 if (IS_ERR(tps65910->regmap)) {
277 ret = PTR_ERR(tps65910->regmap);
278 dev_err(&i2c->dev, "regmap initialization failed: %d\n", ret);
Laxman Dewangan63fe7de2012-05-11 12:36:57 +0200279 return ret;
Laxman Dewangandc9913a2012-02-21 18:21:34 +0530280 }
281
Jesper Juhlb1224cd2011-07-13 23:22:26 +0200282 init_data->irq = pmic_plat_data->irq;
Laxman Dewangan17731402012-01-18 20:19:16 +0530283 init_data->irq_base = pmic_plat_data->irq_base;
Jesper Juhlb1224cd2011-07-13 23:22:26 +0200284
Afzal Mohammed1e351a92011-12-14 16:05:35 +0530285 tps65910_irq_init(tps65910, init_data->irq, init_data);
Johan Hovoldd02e83c2012-07-11 15:44:33 +0200286 tps65910_ck32k_init(tps65910, pmic_plat_data);
Laxman Dewangan201cf052012-04-18 12:13:51 +0200287 tps65910_sleepinit(tps65910, pmic_plat_data);
288
Bill Huangb079fa722012-08-19 18:07:56 -0700289 if (pmic_plat_data->pm_off && !pm_power_off) {
290 tps65910_i2c_client = i2c;
291 pm_power_off = tps65910_power_off;
292 }
293
Laxman Dewangan10ecb802012-11-13 19:33:56 +0530294 ret = mfd_add_devices(tps65910->dev, -1,
295 tps65910s, ARRAY_SIZE(tps65910s),
296 NULL, 0, NULL);
297 if (ret < 0) {
298 dev_err(&i2c->dev, "mfd_add_devices failed: %d\n", ret);
299 return ret;
300 }
301
Graeme Gregory27c67502011-05-02 16:19:46 -0500302 return ret;
303}
304
Mark Brown63745d42012-05-07 10:03:19 +0100305static __devexit int tps65910_i2c_remove(struct i2c_client *i2c)
Graeme Gregory27c67502011-05-02 16:19:46 -0500306{
307 struct tps65910 *tps65910 = i2c_get_clientdata(i2c);
308
Mark Brownec2328c2011-06-20 11:47:55 +0100309 tps65910_irq_exit(tps65910);
Afzal Mohammed1e351a92011-12-14 16:05:35 +0530310 mfd_remove_devices(tps65910->dev);
Graeme Gregory27c67502011-05-02 16:19:46 -0500311
312 return 0;
313}
314
315static const struct i2c_device_id tps65910_i2c_id[] = {
Jorge Eduardo Candelaria79557052011-05-16 18:34:59 -0500316 { "tps65910", TPS65910 },
317 { "tps65911", TPS65911 },
Graeme Gregory27c67502011-05-02 16:19:46 -0500318 { }
319};
320MODULE_DEVICE_TABLE(i2c, tps65910_i2c_id);
321
322
323static struct i2c_driver tps65910_i2c_driver = {
324 .driver = {
325 .name = "tps65910",
326 .owner = THIS_MODULE,
Rhyland Kleincd4209c2012-05-11 11:36:26 +0200327 .of_match_table = of_match_ptr(tps65910_of_match),
Graeme Gregory27c67502011-05-02 16:19:46 -0500328 },
329 .probe = tps65910_i2c_probe,
Mark Brown63745d42012-05-07 10:03:19 +0100330 .remove = __devexit_p(tps65910_i2c_remove),
Graeme Gregory27c67502011-05-02 16:19:46 -0500331 .id_table = tps65910_i2c_id,
332};
333
334static int __init tps65910_i2c_init(void)
335{
336 return i2c_add_driver(&tps65910_i2c_driver);
337}
338/* init early so consumer devices can complete system boot */
339subsys_initcall(tps65910_i2c_init);
340
341static void __exit tps65910_i2c_exit(void)
342{
343 i2c_del_driver(&tps65910_i2c_driver);
344}
345module_exit(tps65910_i2c_exit);
346
347MODULE_AUTHOR("Graeme Gregory <gg@slimlogic.co.uk>");
348MODULE_AUTHOR("Jorge Eduardo Candelaria <jedu@slimlogic.co.uk>");
349MODULE_DESCRIPTION("TPS6591x chip family multi-function driver");
350MODULE_LICENSE("GPL");