Root/drivers/regulator/s2mps11.c

1/*
2 * s2mps11.c
3 *
4 * Copyright (c) 2012 Samsung Electronics Co., Ltd
5 * http://www.samsung.com
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
11 *
12 */
13
14#include <linux/bug.h>
15#include <linux/delay.h>
16#include <linux/err.h>
17#include <linux/gpio.h>
18#include <linux/slab.h>
19#include <linux/module.h>
20#include <linux/platform_device.h>
21#include <linux/regulator/driver.h>
22#include <linux/regulator/machine.h>
23#include <linux/mfd/samsung/core.h>
24#include <linux/mfd/samsung/s2mps11.h>
25
26struct s2mps11_info {
27    struct regulator_dev **rdev;
28
29    int ramp_delay2;
30    int ramp_delay34;
31    int ramp_delay5;
32    int ramp_delay16;
33    int ramp_delay7810;
34    int ramp_delay9;
35
36    bool buck6_ramp;
37    bool buck2_ramp;
38    bool buck3_ramp;
39    bool buck4_ramp;
40};
41
42static int get_ramp_delay(int ramp_delay)
43{
44    unsigned char cnt = 0;
45
46    ramp_delay /= 6;
47
48    while (true) {
49        ramp_delay = ramp_delay >> 1;
50        if (ramp_delay == 0)
51            break;
52        cnt++;
53    }
54    return cnt;
55}
56
57static struct regulator_ops s2mps11_ldo_ops = {
58    .list_voltage = regulator_list_voltage_linear,
59    .map_voltage = regulator_map_voltage_linear,
60    .is_enabled = regulator_is_enabled_regmap,
61    .enable = regulator_enable_regmap,
62    .disable = regulator_disable_regmap,
63    .get_voltage_sel = regulator_get_voltage_sel_regmap,
64    .set_voltage_sel = regulator_set_voltage_sel_regmap,
65    .set_voltage_time_sel = regulator_set_voltage_time_sel,
66};
67
68static struct regulator_ops s2mps11_buck_ops = {
69    .list_voltage = regulator_list_voltage_linear,
70    .map_voltage = regulator_map_voltage_linear,
71    .is_enabled = regulator_is_enabled_regmap,
72    .enable = regulator_enable_regmap,
73    .disable = regulator_disable_regmap,
74    .get_voltage_sel = regulator_get_voltage_sel_regmap,
75    .set_voltage_sel = regulator_set_voltage_sel_regmap,
76    .set_voltage_time_sel = regulator_set_voltage_time_sel,
77};
78
79#define regulator_desc_ldo1(num) { \
80    .name = "LDO"#num, \
81    .id = S2MPS11_LDO##num, \
82    .ops = &s2mps11_ldo_ops, \
83    .type = REGULATOR_VOLTAGE, \
84    .owner = THIS_MODULE, \
85    .min_uV = S2MPS11_LDO_MIN, \
86    .uV_step = S2MPS11_LDO_STEP1, \
87    .n_voltages = S2MPS11_LDO_N_VOLTAGES, \
88    .vsel_reg = S2MPS11_REG_L1CTRL + num - 1, \
89    .vsel_mask = S2MPS11_LDO_VSEL_MASK, \
90    .enable_reg = S2MPS11_REG_L1CTRL + num - 1, \
91    .enable_mask = S2MPS11_ENABLE_MASK \
92}
93#define regulator_desc_ldo2(num) { \
94    .name = "LDO"#num, \
95    .id = S2MPS11_LDO##num, \
96    .ops = &s2mps11_ldo_ops, \
97    .type = REGULATOR_VOLTAGE, \
98    .owner = THIS_MODULE, \
99    .min_uV = S2MPS11_LDO_MIN, \
100    .uV_step = S2MPS11_LDO_STEP2, \
101    .n_voltages = S2MPS11_LDO_N_VOLTAGES, \
102    .vsel_reg = S2MPS11_REG_L1CTRL + num - 1, \
103    .vsel_mask = S2MPS11_LDO_VSEL_MASK, \
104    .enable_reg = S2MPS11_REG_L1CTRL + num - 1, \
105    .enable_mask = S2MPS11_ENABLE_MASK \
106}
107
108#define regulator_desc_buck1_4(num) { \
109    .name = "BUCK"#num, \
110    .id = S2MPS11_BUCK##num, \
111    .ops = &s2mps11_buck_ops, \
112    .type = REGULATOR_VOLTAGE, \
113    .owner = THIS_MODULE, \
114    .min_uV = S2MPS11_BUCK_MIN1, \
115    .uV_step = S2MPS11_BUCK_STEP1, \
116    .n_voltages = S2MPS11_BUCK_N_VOLTAGES, \
117    .vsel_reg = S2MPS11_REG_B1CTRL2 + (num - 1) * 2, \
118    .vsel_mask = S2MPS11_BUCK_VSEL_MASK, \
119    .enable_reg = S2MPS11_REG_B1CTRL1 + (num - 1) * 2, \
120    .enable_mask = S2MPS11_ENABLE_MASK \
121}
122
123#define regulator_desc_buck5 { \
124    .name = "BUCK5", \
125    .id = S2MPS11_BUCK5, \
126    .ops = &s2mps11_buck_ops, \
127    .type = REGULATOR_VOLTAGE, \
128    .owner = THIS_MODULE, \
129    .min_uV = S2MPS11_BUCK_MIN1, \
130    .uV_step = S2MPS11_BUCK_STEP1, \
131    .n_voltages = S2MPS11_BUCK_N_VOLTAGES, \
132    .vsel_reg = S2MPS11_REG_B5CTRL2, \
133    .vsel_mask = S2MPS11_BUCK_VSEL_MASK, \
134    .enable_reg = S2MPS11_REG_B5CTRL1, \
135    .enable_mask = S2MPS11_ENABLE_MASK \
136}
137
138#define regulator_desc_buck6_8(num) { \
139    .name = "BUCK"#num, \
140    .id = S2MPS11_BUCK##num, \
141    .ops = &s2mps11_buck_ops, \
142    .type = REGULATOR_VOLTAGE, \
143    .owner = THIS_MODULE, \
144    .min_uV = S2MPS11_BUCK_MIN1, \
145    .uV_step = S2MPS11_BUCK_STEP1, \
146    .n_voltages = S2MPS11_BUCK_N_VOLTAGES, \
147    .vsel_reg = S2MPS11_REG_B6CTRL2 + (num - 6) * 2, \
148    .vsel_mask = S2MPS11_BUCK_VSEL_MASK, \
149    .enable_reg = S2MPS11_REG_B6CTRL1 + (num - 6) * 2, \
150    .enable_mask = S2MPS11_ENABLE_MASK \
151}
152
153#define regulator_desc_buck9 { \
154    .name = "BUCK9", \
155    .id = S2MPS11_BUCK9, \
156    .ops = &s2mps11_buck_ops, \
157    .type = REGULATOR_VOLTAGE, \
158    .owner = THIS_MODULE, \
159    .min_uV = S2MPS11_BUCK_MIN3, \
160    .uV_step = S2MPS11_BUCK_STEP3, \
161    .n_voltages = S2MPS11_BUCK_N_VOLTAGES, \
162    .vsel_reg = S2MPS11_REG_B9CTRL2, \
163    .vsel_mask = S2MPS11_BUCK_VSEL_MASK, \
164    .enable_reg = S2MPS11_REG_B9CTRL1, \
165    .enable_mask = S2MPS11_ENABLE_MASK \
166}
167
168#define regulator_desc_buck10 { \
169    .name = "BUCK10", \
170    .id = S2MPS11_BUCK10, \
171    .ops = &s2mps11_buck_ops, \
172    .type = REGULATOR_VOLTAGE, \
173    .owner = THIS_MODULE, \
174    .min_uV = S2MPS11_BUCK_MIN2, \
175    .uV_step = S2MPS11_BUCK_STEP2, \
176    .n_voltages = S2MPS11_BUCK_N_VOLTAGES, \
177    .vsel_reg = S2MPS11_REG_B9CTRL2, \
178    .vsel_mask = S2MPS11_BUCK_VSEL_MASK, \
179    .enable_reg = S2MPS11_REG_B9CTRL1, \
180    .enable_mask = S2MPS11_ENABLE_MASK \
181}
182
183static struct regulator_desc regulators[] = {
184    regulator_desc_ldo2(1),
185    regulator_desc_ldo1(2),
186    regulator_desc_ldo1(3),
187    regulator_desc_ldo1(4),
188    regulator_desc_ldo1(5),
189    regulator_desc_ldo2(6),
190    regulator_desc_ldo1(7),
191    regulator_desc_ldo1(8),
192    regulator_desc_ldo1(9),
193    regulator_desc_ldo1(10),
194    regulator_desc_ldo2(11),
195    regulator_desc_ldo1(12),
196    regulator_desc_ldo1(13),
197    regulator_desc_ldo1(14),
198    regulator_desc_ldo1(15),
199    regulator_desc_ldo1(16),
200    regulator_desc_ldo1(17),
201    regulator_desc_ldo1(18),
202    regulator_desc_ldo1(19),
203    regulator_desc_ldo1(20),
204    regulator_desc_ldo1(21),
205    regulator_desc_ldo2(22),
206    regulator_desc_ldo2(23),
207    regulator_desc_ldo1(24),
208    regulator_desc_ldo1(25),
209    regulator_desc_ldo1(26),
210    regulator_desc_ldo2(27),
211    regulator_desc_ldo1(28),
212    regulator_desc_ldo1(29),
213    regulator_desc_ldo1(30),
214    regulator_desc_ldo1(31),
215    regulator_desc_ldo1(32),
216    regulator_desc_ldo1(33),
217    regulator_desc_ldo1(34),
218    regulator_desc_ldo1(35),
219    regulator_desc_ldo1(36),
220    regulator_desc_ldo1(37),
221    regulator_desc_ldo1(38),
222    regulator_desc_buck1_4(1),
223    regulator_desc_buck1_4(2),
224    regulator_desc_buck1_4(3),
225    regulator_desc_buck1_4(4),
226    regulator_desc_buck5,
227    regulator_desc_buck6_8(6),
228    regulator_desc_buck6_8(7),
229    regulator_desc_buck6_8(8),
230    regulator_desc_buck9,
231    regulator_desc_buck10,
232};
233
234static __devinit int s2mps11_pmic_probe(struct platform_device *pdev)
235{
236    struct sec_pmic_dev *iodev = dev_get_drvdata(pdev->dev.parent);
237    struct sec_platform_data *pdata = dev_get_platdata(iodev->dev);
238    struct regulator_config config = { };
239    struct regulator_dev **rdev;
240    struct s2mps11_info *s2mps11;
241    int i, ret, size;
242    unsigned char ramp_enable, ramp_reg = 0;
243
244    if (!pdata) {
245        dev_err(pdev->dev.parent, "Platform data not supplied\n");
246        return -ENODEV;
247    }
248
249    s2mps11 = devm_kzalloc(&pdev->dev, sizeof(struct s2mps11_info),
250                GFP_KERNEL);
251    if (!s2mps11)
252        return -ENOMEM;
253
254    size = sizeof(struct regulator_dev *) * S2MPS11_REGULATOR_MAX;
255    s2mps11->rdev = devm_kzalloc(&pdev->dev, size, GFP_KERNEL);
256    if (!s2mps11->rdev) {
257        return -ENOMEM;
258    }
259
260    rdev = s2mps11->rdev;
261    platform_set_drvdata(pdev, s2mps11);
262
263    s2mps11->ramp_delay2 = pdata->buck2_ramp_delay;
264    s2mps11->ramp_delay34 = pdata->buck34_ramp_delay;
265    s2mps11->ramp_delay5 = pdata->buck5_ramp_delay;
266    s2mps11->ramp_delay16 = pdata->buck16_ramp_delay;
267    s2mps11->ramp_delay7810 = pdata->buck7810_ramp_delay;
268    s2mps11->ramp_delay9 = pdata->buck9_ramp_delay;
269
270    s2mps11->buck6_ramp = pdata->buck6_ramp_enable;
271    s2mps11->buck2_ramp = pdata->buck2_ramp_enable;
272    s2mps11->buck3_ramp = pdata->buck3_ramp_enable;
273    s2mps11->buck4_ramp = pdata->buck4_ramp_enable;
274
275    ramp_enable = (s2mps11->buck2_ramp << 3) | (s2mps11->buck3_ramp << 2) |
276        (s2mps11->buck4_ramp << 1) | s2mps11->buck6_ramp ;
277
278    if (ramp_enable) {
279        if (s2mps11->buck2_ramp)
280            ramp_reg |= get_ramp_delay(s2mps11->ramp_delay2) >> 6;
281        if (s2mps11->buck3_ramp || s2mps11->buck4_ramp)
282            ramp_reg |= get_ramp_delay(s2mps11->ramp_delay34) >> 4;
283        sec_reg_write(iodev, S2MPS11_REG_RAMP, ramp_reg | ramp_enable);
284    }
285
286    ramp_reg &= 0x00;
287    ramp_reg |= get_ramp_delay(s2mps11->ramp_delay5) >> 6;
288    ramp_reg |= get_ramp_delay(s2mps11->ramp_delay16) >> 4;
289    ramp_reg |= get_ramp_delay(s2mps11->ramp_delay7810) >> 2;
290    ramp_reg |= get_ramp_delay(s2mps11->ramp_delay9);
291    sec_reg_write(iodev, S2MPS11_REG_RAMP_BUCK, ramp_reg);
292
293    for (i = 0; i < S2MPS11_REGULATOR_MAX; i++) {
294
295        config.dev = &pdev->dev;
296        config.regmap = iodev->regmap;
297        config.init_data = pdata->regulators[i].initdata;
298        config.driver_data = s2mps11;
299
300        rdev[i] = regulator_register(&regulators[i], &config);
301        if (IS_ERR(rdev[i])) {
302            ret = PTR_ERR(rdev[i]);
303            dev_err(&pdev->dev, "regulator init failed for %d\n",
304                i);
305            rdev[i] = NULL;
306            goto err;
307        }
308    }
309
310    return 0;
311err:
312    for (i = 0; i < S2MPS11_REGULATOR_MAX; i++)
313        if (rdev[i])
314            regulator_unregister(rdev[i]);
315
316    return ret;
317}
318
319static int __devexit s2mps11_pmic_remove(struct platform_device *pdev)
320{
321    struct s2mps11_info *s2mps11 = platform_get_drvdata(pdev);
322    struct regulator_dev **rdev = s2mps11->rdev;
323    int i;
324
325    for (i = 0; i < S2MPS11_REGULATOR_MAX; i++)
326        if (rdev[i])
327            regulator_unregister(rdev[i]);
328
329    return 0;
330}
331
332static const struct platform_device_id s2mps11_pmic_id[] = {
333    { "s2mps11-pmic", 0},
334    { },
335};
336MODULE_DEVICE_TABLE(platform, s2mps11_pmic_id);
337
338static struct platform_driver s2mps11_pmic_driver = {
339    .driver = {
340        .name = "s2mps11-pmic",
341        .owner = THIS_MODULE,
342    },
343    .probe = s2mps11_pmic_probe,
344    .remove = __devexit_p(s2mps11_pmic_remove),
345    .id_table = s2mps11_pmic_id,
346};
347
348static int __init s2mps11_pmic_init(void)
349{
350    return platform_driver_register(&s2mps11_pmic_driver);
351}
352subsys_initcall(s2mps11_pmic_init);
353
354static void __exit s2mps11_pmic_exit(void)
355{
356    platform_driver_unregister(&s2mps11_pmic_driver);
357}
358module_exit(s2mps11_pmic_exit);
359
360/* Module information */
361MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
362MODULE_DESCRIPTION("SAMSUNG S2MPS11 Regulator Driver");
363MODULE_LICENSE("GPL");
364

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