2 * Copyright (c) 2013 Samsung Electronics Co., Ltd
3 * http://www.samsung.com
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; either version 2 of the License, or (at your
8 * option) any later version.
12 #include <linux/bug.h>
13 #include <linux/err.h>
14 #include <linux/gpio.h>
15 #include <linux/slab.h>
16 #include <linux/module.h>
18 #include <linux/regmap.h>
19 #include <linux/platform_device.h>
20 #include <linux/regulator/driver.h>
21 #include <linux/regulator/machine.h>
22 #include <linux/regulator/of_regulator.h>
23 #include <linux/mfd/samsung/core.h>
24 #include <linux/mfd/samsung/s2mpa01.h>
26 #define S2MPA01_REGULATOR_CNT ARRAY_SIZE(regulators)
37 static int get_ramp_delay(int ramp_delay
)
39 unsigned char cnt
= 0;
44 ramp_delay
= ramp_delay
>> 1;
56 static int s2mpa01_regulator_set_voltage_time_sel(struct regulator_dev
*rdev
,
57 unsigned int old_selector
,
58 unsigned int new_selector
)
60 struct s2mpa01_info
*s2mpa01
= rdev_get_drvdata(rdev
);
61 unsigned int ramp_delay
= 0;
62 int old_volt
, new_volt
;
64 switch (rdev
->desc
->id
) {
67 ramp_delay
= s2mpa01
->ramp_delay24
;
70 ramp_delay
= s2mpa01
->ramp_delay3
;
73 ramp_delay
= s2mpa01
->ramp_delay5
;
77 ramp_delay
= s2mpa01
->ramp_delay16
;
80 ramp_delay
= s2mpa01
->ramp_delay7
;
85 ramp_delay
= s2mpa01
->ramp_delay8910
;
90 ramp_delay
= rdev
->desc
->ramp_delay
;
92 old_volt
= rdev
->desc
->min_uV
+ (rdev
->desc
->uV_step
* old_selector
);
93 new_volt
= rdev
->desc
->min_uV
+ (rdev
->desc
->uV_step
* new_selector
);
95 return DIV_ROUND_UP(abs(new_volt
- old_volt
), ramp_delay
);
98 static int s2mpa01_set_ramp_delay(struct regulator_dev
*rdev
, int ramp_delay
)
100 struct s2mpa01_info
*s2mpa01
= rdev_get_drvdata(rdev
);
101 unsigned int ramp_val
, ramp_shift
, ramp_reg
= S2MPA01_REG_RAMP2
;
102 unsigned int ramp_enable
= 1, enable_shift
= 0;
105 switch (rdev
->desc
->id
) {
107 enable_shift
= S2MPA01_BUCK1_RAMP_EN_SHIFT
;
113 if (ramp_delay
> s2mpa01
->ramp_delay16
)
114 s2mpa01
->ramp_delay16
= ramp_delay
;
116 ramp_delay
= s2mpa01
->ramp_delay16
;
118 ramp_shift
= S2MPA01_BUCK16_RAMP_SHIFT
;
119 ramp_reg
= S2MPA01_REG_RAMP1
;
122 enable_shift
= S2MPA01_BUCK2_RAMP_EN_SHIFT
;
128 if (ramp_delay
> s2mpa01
->ramp_delay24
)
129 s2mpa01
->ramp_delay24
= ramp_delay
;
131 ramp_delay
= s2mpa01
->ramp_delay24
;
133 ramp_shift
= S2MPA01_BUCK24_RAMP_SHIFT
;
134 ramp_reg
= S2MPA01_REG_RAMP1
;
137 enable_shift
= S2MPA01_BUCK3_RAMP_EN_SHIFT
;
143 s2mpa01
->ramp_delay3
= ramp_delay
;
144 ramp_shift
= S2MPA01_BUCK3_RAMP_SHIFT
;
145 ramp_reg
= S2MPA01_REG_RAMP1
;
148 enable_shift
= S2MPA01_BUCK4_RAMP_EN_SHIFT
;
154 if (ramp_delay
> s2mpa01
->ramp_delay24
)
155 s2mpa01
->ramp_delay24
= ramp_delay
;
157 ramp_delay
= s2mpa01
->ramp_delay24
;
159 ramp_shift
= S2MPA01_BUCK24_RAMP_SHIFT
;
160 ramp_reg
= S2MPA01_REG_RAMP1
;
163 s2mpa01
->ramp_delay5
= ramp_delay
;
164 ramp_shift
= S2MPA01_BUCK5_RAMP_SHIFT
;
167 if (ramp_delay
> s2mpa01
->ramp_delay16
)
168 s2mpa01
->ramp_delay16
= ramp_delay
;
170 ramp_delay
= s2mpa01
->ramp_delay16
;
172 ramp_shift
= S2MPA01_BUCK16_RAMP_SHIFT
;
175 s2mpa01
->ramp_delay7
= ramp_delay
;
176 ramp_shift
= S2MPA01_BUCK7_RAMP_SHIFT
;
181 if (ramp_delay
> s2mpa01
->ramp_delay8910
)
182 s2mpa01
->ramp_delay8910
= ramp_delay
;
184 ramp_delay
= s2mpa01
->ramp_delay8910
;
186 ramp_shift
= S2MPA01_BUCK8910_RAMP_SHIFT
;
195 ret
= regmap_update_bits(rdev
->regmap
, S2MPA01_REG_RAMP1
,
196 1 << enable_shift
, 1 << enable_shift
);
198 dev_err(&rdev
->dev
, "failed to enable ramp rate\n");
202 ramp_val
= get_ramp_delay(ramp_delay
);
204 return regmap_update_bits(rdev
->regmap
, ramp_reg
, 0x3 << ramp_shift
,
205 ramp_val
<< ramp_shift
);
208 return regmap_update_bits(rdev
->regmap
, S2MPA01_REG_RAMP1
,
209 1 << enable_shift
, 0);
212 static struct regulator_ops s2mpa01_ldo_ops
= {
213 .list_voltage
= regulator_list_voltage_linear
,
214 .map_voltage
= regulator_map_voltage_linear
,
215 .is_enabled
= regulator_is_enabled_regmap
,
216 .enable
= regulator_enable_regmap
,
217 .disable
= regulator_disable_regmap
,
218 .get_voltage_sel
= regulator_get_voltage_sel_regmap
,
219 .set_voltage_sel
= regulator_set_voltage_sel_regmap
,
220 .set_voltage_time_sel
= regulator_set_voltage_time_sel
,
223 static struct regulator_ops s2mpa01_buck_ops
= {
224 .list_voltage
= regulator_list_voltage_linear
,
225 .map_voltage
= regulator_map_voltage_linear
,
226 .is_enabled
= regulator_is_enabled_regmap
,
227 .enable
= regulator_enable_regmap
,
228 .disable
= regulator_disable_regmap
,
229 .get_voltage_sel
= regulator_get_voltage_sel_regmap
,
230 .set_voltage_sel
= regulator_set_voltage_sel_regmap
,
231 .set_voltage_time_sel
= s2mpa01_regulator_set_voltage_time_sel
,
232 .set_ramp_delay
= s2mpa01_set_ramp_delay
,
235 #define regulator_desc_ldo1(num) { \
237 .id = S2MPA01_LDO##num, \
238 .ops = &s2mpa01_ldo_ops, \
239 .type = REGULATOR_VOLTAGE, \
240 .owner = THIS_MODULE, \
241 .min_uV = S2MPA01_LDO_MIN, \
242 .uV_step = S2MPA01_LDO_STEP1, \
243 .n_voltages = S2MPA01_LDO_N_VOLTAGES, \
244 .vsel_reg = S2MPA01_REG_L1CTRL + num - 1, \
245 .vsel_mask = S2MPA01_LDO_VSEL_MASK, \
246 .enable_reg = S2MPA01_REG_L1CTRL + num - 1, \
247 .enable_mask = S2MPA01_ENABLE_MASK \
249 #define regulator_desc_ldo2(num) { \
251 .id = S2MPA01_LDO##num, \
252 .ops = &s2mpa01_ldo_ops, \
253 .type = REGULATOR_VOLTAGE, \
254 .owner = THIS_MODULE, \
255 .min_uV = S2MPA01_LDO_MIN, \
256 .uV_step = S2MPA01_LDO_STEP2, \
257 .n_voltages = S2MPA01_LDO_N_VOLTAGES, \
258 .vsel_reg = S2MPA01_REG_L1CTRL + num - 1, \
259 .vsel_mask = S2MPA01_LDO_VSEL_MASK, \
260 .enable_reg = S2MPA01_REG_L1CTRL + num - 1, \
261 .enable_mask = S2MPA01_ENABLE_MASK \
264 #define regulator_desc_buck1_4(num) { \
265 .name = "BUCK"#num, \
266 .id = S2MPA01_BUCK##num, \
267 .ops = &s2mpa01_buck_ops, \
268 .type = REGULATOR_VOLTAGE, \
269 .owner = THIS_MODULE, \
270 .min_uV = S2MPA01_BUCK_MIN1, \
271 .uV_step = S2MPA01_BUCK_STEP1, \
272 .n_voltages = S2MPA01_BUCK_N_VOLTAGES, \
273 .ramp_delay = S2MPA01_RAMP_DELAY, \
274 .vsel_reg = S2MPA01_REG_B1CTRL2 + (num - 1) * 2, \
275 .vsel_mask = S2MPA01_BUCK_VSEL_MASK, \
276 .enable_reg = S2MPA01_REG_B1CTRL1 + (num - 1) * 2, \
277 .enable_mask = S2MPA01_ENABLE_MASK \
280 #define regulator_desc_buck5 { \
282 .id = S2MPA01_BUCK5, \
283 .ops = &s2mpa01_buck_ops, \
284 .type = REGULATOR_VOLTAGE, \
285 .owner = THIS_MODULE, \
286 .min_uV = S2MPA01_BUCK_MIN2, \
287 .uV_step = S2MPA01_BUCK_STEP1, \
288 .n_voltages = S2MPA01_BUCK_N_VOLTAGES, \
289 .ramp_delay = S2MPA01_RAMP_DELAY, \
290 .vsel_reg = S2MPA01_REG_B5CTRL2, \
291 .vsel_mask = S2MPA01_BUCK_VSEL_MASK, \
292 .enable_reg = S2MPA01_REG_B5CTRL1, \
293 .enable_mask = S2MPA01_ENABLE_MASK \
296 #define regulator_desc_buck6_7(num) { \
297 .name = "BUCK"#num, \
298 .id = S2MPA01_BUCK##num, \
299 .ops = &s2mpa01_buck_ops, \
300 .type = REGULATOR_VOLTAGE, \
301 .owner = THIS_MODULE, \
302 .min_uV = S2MPA01_BUCK_MIN1, \
303 .uV_step = S2MPA01_BUCK_STEP1, \
304 .n_voltages = S2MPA01_BUCK_N_VOLTAGES, \
305 .ramp_delay = S2MPA01_RAMP_DELAY, \
306 .vsel_reg = S2MPA01_REG_B6CTRL2 + (num - 6) * 2, \
307 .vsel_mask = S2MPA01_BUCK_VSEL_MASK, \
308 .enable_reg = S2MPA01_REG_B6CTRL1 + (num - 6) * 2, \
309 .enable_mask = S2MPA01_ENABLE_MASK \
312 #define regulator_desc_buck8 { \
314 .id = S2MPA01_BUCK8, \
315 .ops = &s2mpa01_buck_ops, \
316 .type = REGULATOR_VOLTAGE, \
317 .owner = THIS_MODULE, \
318 .min_uV = S2MPA01_BUCK_MIN2, \
319 .uV_step = S2MPA01_BUCK_STEP2, \
320 .n_voltages = S2MPA01_BUCK_N_VOLTAGES, \
321 .ramp_delay = S2MPA01_RAMP_DELAY, \
322 .vsel_reg = S2MPA01_REG_B8CTRL2, \
323 .vsel_mask = S2MPA01_BUCK_VSEL_MASK, \
324 .enable_reg = S2MPA01_REG_B8CTRL1, \
325 .enable_mask = S2MPA01_ENABLE_MASK \
328 #define regulator_desc_buck9 { \
330 .id = S2MPA01_BUCK9, \
331 .ops = &s2mpa01_buck_ops, \
332 .type = REGULATOR_VOLTAGE, \
333 .owner = THIS_MODULE, \
334 .min_uV = S2MPA01_BUCK_MIN4, \
335 .uV_step = S2MPA01_BUCK_STEP2, \
336 .n_voltages = S2MPA01_BUCK_N_VOLTAGES, \
337 .ramp_delay = S2MPA01_RAMP_DELAY, \
338 .vsel_reg = S2MPA01_REG_B9CTRL2, \
339 .vsel_mask = S2MPA01_BUCK_VSEL_MASK, \
340 .enable_reg = S2MPA01_REG_B9CTRL1, \
341 .enable_mask = S2MPA01_ENABLE_MASK \
344 #define regulator_desc_buck10 { \
346 .id = S2MPA01_BUCK10, \
347 .ops = &s2mpa01_buck_ops, \
348 .type = REGULATOR_VOLTAGE, \
349 .owner = THIS_MODULE, \
350 .min_uV = S2MPA01_BUCK_MIN3, \
351 .uV_step = S2MPA01_BUCK_STEP2, \
352 .n_voltages = S2MPA01_BUCK_N_VOLTAGES, \
353 .ramp_delay = S2MPA01_RAMP_DELAY, \
354 .vsel_reg = S2MPA01_REG_B10CTRL2, \
355 .vsel_mask = S2MPA01_BUCK_VSEL_MASK, \
356 .enable_reg = S2MPA01_REG_B10CTRL1, \
357 .enable_mask = S2MPA01_ENABLE_MASK \
360 static struct regulator_desc regulators
[] = {
361 regulator_desc_ldo2(1),
362 regulator_desc_ldo1(2),
363 regulator_desc_ldo1(3),
364 regulator_desc_ldo1(4),
365 regulator_desc_ldo1(5),
366 regulator_desc_ldo2(6),
367 regulator_desc_ldo1(7),
368 regulator_desc_ldo1(8),
369 regulator_desc_ldo1(9),
370 regulator_desc_ldo1(10),
371 regulator_desc_ldo2(11),
372 regulator_desc_ldo1(12),
373 regulator_desc_ldo1(13),
374 regulator_desc_ldo1(14),
375 regulator_desc_ldo1(15),
376 regulator_desc_ldo1(16),
377 regulator_desc_ldo1(17),
378 regulator_desc_ldo1(18),
379 regulator_desc_ldo1(19),
380 regulator_desc_ldo1(20),
381 regulator_desc_ldo1(21),
382 regulator_desc_ldo2(22),
383 regulator_desc_ldo2(23),
384 regulator_desc_ldo1(24),
385 regulator_desc_ldo1(25),
386 regulator_desc_ldo1(26),
387 regulator_desc_buck1_4(1),
388 regulator_desc_buck1_4(2),
389 regulator_desc_buck1_4(3),
390 regulator_desc_buck1_4(4),
391 regulator_desc_buck5
,
392 regulator_desc_buck6_7(6),
393 regulator_desc_buck6_7(7),
394 regulator_desc_buck8
,
395 regulator_desc_buck9
,
396 regulator_desc_buck10
,
399 static int s2mpa01_pmic_probe(struct platform_device
*pdev
)
401 struct sec_pmic_dev
*iodev
= dev_get_drvdata(pdev
->dev
.parent
);
402 struct sec_platform_data
*pdata
= dev_get_platdata(iodev
->dev
);
403 struct of_regulator_match rdata
[S2MPA01_REGULATOR_MAX
];
404 struct device_node
*reg_np
= NULL
;
405 struct regulator_config config
= { };
406 struct s2mpa01_info
*s2mpa01
;
409 s2mpa01
= devm_kzalloc(&pdev
->dev
, sizeof(*s2mpa01
), GFP_KERNEL
);
413 for (i
= 0; i
< S2MPA01_REGULATOR_CNT
; i
++)
414 rdata
[i
].name
= regulators
[i
].name
;
416 if (iodev
->dev
->of_node
) {
417 reg_np
= of_get_child_by_name(iodev
->dev
->of_node
,
421 "could not find regulators sub-node\n");
425 of_regulator_match(&pdev
->dev
, reg_np
, rdata
,
426 S2MPA01_REGULATOR_MAX
);
430 platform_set_drvdata(pdev
, s2mpa01
);
432 config
.dev
= &pdev
->dev
;
433 config
.regmap
= iodev
->regmap_pmic
;
434 config
.driver_data
= s2mpa01
;
436 for (i
= 0; i
< S2MPA01_REGULATOR_MAX
; i
++) {
437 struct regulator_dev
*rdev
;
439 config
.init_data
= pdata
->regulators
[i
].initdata
;
441 config
.init_data
= rdata
[i
].init_data
;
444 config
.of_node
= rdata
[i
].of_node
;
446 rdev
= devm_regulator_register(&pdev
->dev
,
447 ®ulators
[i
], &config
);
449 dev_err(&pdev
->dev
, "regulator init failed for %d\n",
451 return PTR_ERR(rdev
);
458 static const struct platform_device_id s2mpa01_pmic_id
[] = {
459 { "s2mpa01-pmic", 0},
462 MODULE_DEVICE_TABLE(platform
, s2mpa01_pmic_id
);
464 static struct platform_driver s2mpa01_pmic_driver
= {
466 .name
= "s2mpa01-pmic",
467 .owner
= THIS_MODULE
,
469 .probe
= s2mpa01_pmic_probe
,
470 .id_table
= s2mpa01_pmic_id
,
473 module_platform_driver(s2mpa01_pmic_driver
);
475 /* Module information */
476 MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
477 MODULE_AUTHOR("Sachin Kamat <sachin.kamat@samsung.com>");
478 MODULE_DESCRIPTION("SAMSUNG S2MPA01 Regulator Driver");
479 MODULE_LICENSE("GPL");