Root/drivers/mfd/tps65910.c

1/*
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>
19#include <linux/err.h>
20#include <linux/slab.h>
21#include <linux/i2c.h>
22#include <linux/mfd/core.h>
23#include <linux/regmap.h>
24#include <linux/mfd/tps65910.h>
25#include <linux/of_device.h>
26
27static struct mfd_cell tps65910s[] = {
28    {
29        .name = "tps65910-gpio",
30    },
31    {
32        .name = "tps65910-pmic",
33    },
34    {
35        .name = "tps65910-rtc",
36    },
37    {
38        .name = "tps65910-power",
39    },
40};
41
42
43static 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
63static const struct regmap_config tps65910_regmap_config = {
64    .reg_bits = 8,
65    .val_bits = 8,
66    .volatile_reg = is_volatile_reg,
67    .max_register = TPS65910_MAX_REGISTER - 1,
68    .cache_type = REGCACHE_RBTREE,
69};
70
71static int __devinit tps65910_ck32k_init(struct tps65910 *tps65910,
72                    struct tps65910_board *pmic_pdata)
73{
74    int ret;
75
76    if (!pmic_pdata->en_ck32k_xtal)
77        return 0;
78
79    ret = tps65910_reg_clear_bits(tps65910, TPS65910_DEVCTRL,
80                        DEVCTRL_CK32K_CTRL_MASK);
81    if (ret < 0) {
82        dev_err(tps65910->dev, "clear ck32k_ctrl failed: %d\n", ret);
83        return ret;
84    }
85
86    return 0;
87}
88
89static int __devinit tps65910_sleepinit(struct tps65910 *tps65910,
90        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 */
101    ret = tps65910_reg_set_bits(tps65910, TPS65910_DEVCTRL,
102                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) {
113        ret = tps65910_reg_set_bits(tps65910,
114                TPS65910_SLEEP_KEEP_RES_ON,
115                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) {
123        ret = tps65910_reg_set_bits(tps65910,
124                TPS65910_SLEEP_KEEP_RES_ON,
125                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) {
133        ret = tps65910_reg_set_bits(tps65910,
134                TPS65910_SLEEP_KEEP_RES_ON,
135                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:
145    tps65910_reg_clear_bits(tps65910, TPS65910_DEVCTRL,
146                DEVCTRL_DEV_SLP_MASK);
147
148err_sleep_init:
149    return ret;
150}
151
152#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;
167    int ret = 0;
168
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
196    prop = of_property_read_bool(np, "ti,en-ck32k-xtal");
197    board_info->en_ck32k_xtal = prop;
198
199    board_info->irq = client->irq;
200    board_info->irq_base = -1;
201
202    return board_info;
203}
204#else
205static inline
206struct tps65910_board *tps65910_parse_dt(struct i2c_client *client,
207                     int *chip_id)
208{
209    return NULL;
210}
211#endif
212
213static __devinit int tps65910_i2c_probe(struct i2c_client *i2c,
214                    const struct i2c_device_id *id)
215{
216    struct tps65910 *tps65910;
217    struct tps65910_board *pmic_plat_data;
218    struct tps65910_board *of_pmic_plat_data = NULL;
219    struct tps65910_platform_data *init_data;
220    int ret = 0;
221    int chip_id = id->driver_data;
222
223    pmic_plat_data = dev_get_platdata(&i2c->dev);
224
225    if (!pmic_plat_data && i2c->dev.of_node) {
226        pmic_plat_data = tps65910_parse_dt(i2c, &chip_id);
227        of_pmic_plat_data = pmic_plat_data;
228    }
229
230    if (!pmic_plat_data)
231        return -EINVAL;
232
233    init_data = devm_kzalloc(&i2c->dev, sizeof(*init_data), GFP_KERNEL);
234    if (init_data == NULL)
235        return -ENOMEM;
236
237    tps65910 = devm_kzalloc(&i2c->dev, sizeof(*tps65910), GFP_KERNEL);
238    if (tps65910 == NULL)
239        return -ENOMEM;
240
241    tps65910->of_plat_data = of_pmic_plat_data;
242    i2c_set_clientdata(i2c, tps65910);
243    tps65910->dev = &i2c->dev;
244    tps65910->i2c_client = i2c;
245    tps65910->id = chip_id;
246    mutex_init(&tps65910->io_mutex);
247
248    tps65910->regmap = devm_regmap_init_i2c(i2c, &tps65910_regmap_config);
249    if (IS_ERR(tps65910->regmap)) {
250        ret = PTR_ERR(tps65910->regmap);
251        dev_err(&i2c->dev, "regmap initialization failed: %d\n", ret);
252        return ret;
253    }
254
255    ret = mfd_add_devices(tps65910->dev, -1,
256                  tps65910s, ARRAY_SIZE(tps65910s),
257                  NULL, 0, NULL);
258    if (ret < 0) {
259        dev_err(&i2c->dev, "mfd_add_devices failed: %d\n", ret);
260        return ret;
261    }
262
263    init_data->irq = pmic_plat_data->irq;
264    init_data->irq_base = pmic_plat_data->irq_base;
265
266    tps65910_irq_init(tps65910, init_data->irq, init_data);
267    tps65910_ck32k_init(tps65910, pmic_plat_data);
268    tps65910_sleepinit(tps65910, pmic_plat_data);
269
270    return ret;
271}
272
273static __devexit int tps65910_i2c_remove(struct i2c_client *i2c)
274{
275    struct tps65910 *tps65910 = i2c_get_clientdata(i2c);
276
277    tps65910_irq_exit(tps65910);
278    mfd_remove_devices(tps65910->dev);
279
280    return 0;
281}
282
283static const struct i2c_device_id tps65910_i2c_id[] = {
284       { "tps65910", TPS65910 },
285       { "tps65911", TPS65911 },
286       { }
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,
295           .of_match_table = of_match_ptr(tps65910_of_match),
296    },
297    .probe = tps65910_i2c_probe,
298    .remove = __devexit_p(tps65910_i2c_remove),
299    .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");
319

Archive Download this file

Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
jz-3.12
jz-3.13
jz-3.15
jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master

Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9



interactive