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)
29 struct of_regulator_match rdata
[S2MPA01_REGULATOR_MAX
];
38 static int get_ramp_delay(int ramp_delay
)
40 unsigned char cnt
= 0;
45 ramp_delay
= ramp_delay
>> 1;
57 static int s2mpa01_regulator_set_voltage_time_sel(struct regulator_dev
*rdev
,
58 unsigned int old_selector
,
59 unsigned int new_selector
)
61 struct s2mpa01_info
*s2mpa01
= rdev_get_drvdata(rdev
);
62 unsigned int ramp_delay
= 0;
63 int old_volt
, new_volt
;
65 switch (rdev_get_id(rdev
)) {
68 ramp_delay
= s2mpa01
->ramp_delay24
;
71 ramp_delay
= s2mpa01
->ramp_delay3
;
74 ramp_delay
= s2mpa01
->ramp_delay5
;
78 ramp_delay
= s2mpa01
->ramp_delay16
;
81 ramp_delay
= s2mpa01
->ramp_delay7
;
86 ramp_delay
= s2mpa01
->ramp_delay8910
;
91 ramp_delay
= rdev
->desc
->ramp_delay
;
93 old_volt
= rdev
->desc
->min_uV
+ (rdev
->desc
->uV_step
* old_selector
);
94 new_volt
= rdev
->desc
->min_uV
+ (rdev
->desc
->uV_step
* new_selector
);
96 return DIV_ROUND_UP(abs(new_volt
- old_volt
), ramp_delay
);
99 static int s2mpa01_set_ramp_delay(struct regulator_dev
*rdev
, int ramp_delay
)
101 struct s2mpa01_info
*s2mpa01
= rdev_get_drvdata(rdev
);
102 unsigned int ramp_val
, ramp_shift
, ramp_reg
= S2MPA01_REG_RAMP2
;
103 unsigned int ramp_enable
= 1, enable_shift
= 0;
106 switch (rdev_get_id(rdev
)) {
108 enable_shift
= S2MPA01_BUCK1_RAMP_EN_SHIFT
;
114 if (ramp_delay
> s2mpa01
->ramp_delay16
)
115 s2mpa01
->ramp_delay16
= ramp_delay
;
117 ramp_delay
= s2mpa01
->ramp_delay16
;
119 ramp_shift
= S2MPA01_BUCK16_RAMP_SHIFT
;
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 /* Ramp delay can be enabled/disabled only for buck[1234] */
196 if (rdev_get_id(rdev
) >= S2MPA01_BUCK1
&&
197 rdev_get_id(rdev
) <= S2MPA01_BUCK4
) {
198 ret
= regmap_update_bits(rdev
->regmap
, S2MPA01_REG_RAMP1
,
199 1 << enable_shift
, 1 << enable_shift
);
201 dev_err(&rdev
->dev
, "failed to enable ramp rate\n");
206 ramp_val
= get_ramp_delay(ramp_delay
);
208 return regmap_update_bits(rdev
->regmap
, ramp_reg
, 0x3 << ramp_shift
,
209 ramp_val
<< ramp_shift
);
212 return regmap_update_bits(rdev
->regmap
, S2MPA01_REG_RAMP1
,
213 1 << enable_shift
, 0);
216 static struct regulator_ops s2mpa01_ldo_ops
= {
217 .list_voltage
= regulator_list_voltage_linear
,
218 .map_voltage
= regulator_map_voltage_linear
,
219 .is_enabled
= regulator_is_enabled_regmap
,
220 .enable
= regulator_enable_regmap
,
221 .disable
= regulator_disable_regmap
,
222 .get_voltage_sel
= regulator_get_voltage_sel_regmap
,
223 .set_voltage_sel
= regulator_set_voltage_sel_regmap
,
224 .set_voltage_time_sel
= regulator_set_voltage_time_sel
,
227 static struct regulator_ops s2mpa01_buck_ops
= {
228 .list_voltage
= regulator_list_voltage_linear
,
229 .map_voltage
= regulator_map_voltage_linear
,
230 .is_enabled
= regulator_is_enabled_regmap
,
231 .enable
= regulator_enable_regmap
,
232 .disable
= regulator_disable_regmap
,
233 .get_voltage_sel
= regulator_get_voltage_sel_regmap
,
234 .set_voltage_sel
= regulator_set_voltage_sel_regmap
,
235 .set_voltage_time_sel
= s2mpa01_regulator_set_voltage_time_sel
,
236 .set_ramp_delay
= s2mpa01_set_ramp_delay
,
239 #define regulator_desc_ldo(num, step) { \
241 .id = S2MPA01_LDO##num, \
242 .ops = &s2mpa01_ldo_ops, \
243 .type = REGULATOR_VOLTAGE, \
244 .owner = THIS_MODULE, \
245 .min_uV = MIN_800_MV, \
247 .n_voltages = S2MPA01_LDO_N_VOLTAGES, \
248 .vsel_reg = S2MPA01_REG_L1CTRL + num - 1, \
249 .vsel_mask = S2MPA01_LDO_VSEL_MASK, \
250 .enable_reg = S2MPA01_REG_L1CTRL + num - 1, \
251 .enable_mask = S2MPA01_ENABLE_MASK \
254 #define regulator_desc_buck1_4(num) { \
255 .name = "BUCK"#num, \
256 .id = S2MPA01_BUCK##num, \
257 .ops = &s2mpa01_buck_ops, \
258 .type = REGULATOR_VOLTAGE, \
259 .owner = THIS_MODULE, \
260 .min_uV = MIN_600_MV, \
261 .uV_step = STEP_6_25_MV, \
262 .n_voltages = S2MPA01_BUCK_N_VOLTAGES, \
263 .ramp_delay = S2MPA01_RAMP_DELAY, \
264 .vsel_reg = S2MPA01_REG_B1CTRL2 + (num - 1) * 2, \
265 .vsel_mask = S2MPA01_BUCK_VSEL_MASK, \
266 .enable_reg = S2MPA01_REG_B1CTRL1 + (num - 1) * 2, \
267 .enable_mask = S2MPA01_ENABLE_MASK \
270 #define regulator_desc_buck5 { \
272 .id = S2MPA01_BUCK5, \
273 .ops = &s2mpa01_buck_ops, \
274 .type = REGULATOR_VOLTAGE, \
275 .owner = THIS_MODULE, \
276 .min_uV = MIN_800_MV, \
277 .uV_step = STEP_6_25_MV, \
278 .n_voltages = S2MPA01_BUCK_N_VOLTAGES, \
279 .ramp_delay = S2MPA01_RAMP_DELAY, \
280 .vsel_reg = S2MPA01_REG_B5CTRL2, \
281 .vsel_mask = S2MPA01_BUCK_VSEL_MASK, \
282 .enable_reg = S2MPA01_REG_B5CTRL1, \
283 .enable_mask = S2MPA01_ENABLE_MASK \
286 #define regulator_desc_buck6_10(num, min, step) { \
287 .name = "BUCK"#num, \
288 .id = S2MPA01_BUCK##num, \
289 .ops = &s2mpa01_buck_ops, \
290 .type = REGULATOR_VOLTAGE, \
291 .owner = THIS_MODULE, \
294 .n_voltages = S2MPA01_BUCK_N_VOLTAGES, \
295 .ramp_delay = S2MPA01_RAMP_DELAY, \
296 .vsel_reg = S2MPA01_REG_B6CTRL2 + (num - 6) * 2, \
297 .vsel_mask = S2MPA01_BUCK_VSEL_MASK, \
298 .enable_reg = S2MPA01_REG_B6CTRL1 + (num - 6) * 2, \
299 .enable_mask = S2MPA01_ENABLE_MASK \
302 static const struct regulator_desc regulators
[] = {
303 regulator_desc_ldo(1, STEP_25_MV
),
304 regulator_desc_ldo(2, STEP_50_MV
),
305 regulator_desc_ldo(3, STEP_50_MV
),
306 regulator_desc_ldo(4, STEP_50_MV
),
307 regulator_desc_ldo(5, STEP_50_MV
),
308 regulator_desc_ldo(6, STEP_25_MV
),
309 regulator_desc_ldo(7, STEP_50_MV
),
310 regulator_desc_ldo(8, STEP_50_MV
),
311 regulator_desc_ldo(9, STEP_50_MV
),
312 regulator_desc_ldo(10, STEP_50_MV
),
313 regulator_desc_ldo(11, STEP_25_MV
),
314 regulator_desc_ldo(12, STEP_50_MV
),
315 regulator_desc_ldo(13, STEP_50_MV
),
316 regulator_desc_ldo(14, STEP_50_MV
),
317 regulator_desc_ldo(15, STEP_50_MV
),
318 regulator_desc_ldo(16, STEP_50_MV
),
319 regulator_desc_ldo(17, STEP_50_MV
),
320 regulator_desc_ldo(18, STEP_50_MV
),
321 regulator_desc_ldo(19, STEP_50_MV
),
322 regulator_desc_ldo(20, STEP_50_MV
),
323 regulator_desc_ldo(21, STEP_50_MV
),
324 regulator_desc_ldo(22, STEP_25_MV
),
325 regulator_desc_ldo(23, STEP_25_MV
),
326 regulator_desc_ldo(24, STEP_50_MV
),
327 regulator_desc_ldo(25, STEP_50_MV
),
328 regulator_desc_ldo(26, STEP_50_MV
),
329 regulator_desc_buck1_4(1),
330 regulator_desc_buck1_4(2),
331 regulator_desc_buck1_4(3),
332 regulator_desc_buck1_4(4),
333 regulator_desc_buck5
,
334 regulator_desc_buck6_10(6, MIN_600_MV
, STEP_6_25_MV
),
335 regulator_desc_buck6_10(7, MIN_600_MV
, STEP_6_25_MV
),
336 regulator_desc_buck6_10(8, MIN_800_MV
, STEP_12_5_MV
),
337 regulator_desc_buck6_10(9, MIN_1500_MV
, STEP_12_5_MV
),
338 regulator_desc_buck6_10(10, MIN_1000_MV
, STEP_12_5_MV
),
341 static int s2mpa01_pmic_probe(struct platform_device
*pdev
)
343 struct sec_pmic_dev
*iodev
= dev_get_drvdata(pdev
->dev
.parent
);
344 struct sec_platform_data
*pdata
= dev_get_platdata(iodev
->dev
);
345 struct device_node
*reg_np
= NULL
;
346 struct regulator_config config
= { };
347 struct of_regulator_match
*rdata
;
348 struct s2mpa01_info
*s2mpa01
;
351 s2mpa01
= devm_kzalloc(&pdev
->dev
, sizeof(*s2mpa01
), GFP_KERNEL
);
355 rdata
= s2mpa01
->rdata
;
356 for (i
= 0; i
< S2MPA01_REGULATOR_CNT
; i
++)
357 rdata
[i
].name
= regulators
[i
].name
;
359 if (iodev
->dev
->of_node
) {
360 reg_np
= of_get_child_by_name(iodev
->dev
->of_node
,
364 "could not find regulators sub-node\n");
368 of_regulator_match(&pdev
->dev
, reg_np
, rdata
,
369 S2MPA01_REGULATOR_MAX
);
373 platform_set_drvdata(pdev
, s2mpa01
);
375 config
.dev
= &pdev
->dev
;
376 config
.regmap
= iodev
->regmap_pmic
;
377 config
.driver_data
= s2mpa01
;
379 for (i
= 0; i
< S2MPA01_REGULATOR_MAX
; i
++) {
380 struct regulator_dev
*rdev
;
382 config
.init_data
= pdata
->regulators
[i
].initdata
;
384 config
.init_data
= rdata
[i
].init_data
;
387 config
.of_node
= rdata
[i
].of_node
;
389 rdev
= devm_regulator_register(&pdev
->dev
,
390 ®ulators
[i
], &config
);
392 dev_err(&pdev
->dev
, "regulator init failed for %d\n",
394 return PTR_ERR(rdev
);
401 static const struct platform_device_id s2mpa01_pmic_id
[] = {
402 { "s2mpa01-pmic", 0},
405 MODULE_DEVICE_TABLE(platform
, s2mpa01_pmic_id
);
407 static struct platform_driver s2mpa01_pmic_driver
= {
409 .name
= "s2mpa01-pmic",
411 .probe
= s2mpa01_pmic_probe
,
412 .id_table
= s2mpa01_pmic_id
,
415 module_platform_driver(s2mpa01_pmic_driver
);
417 /* Module information */
418 MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
419 MODULE_AUTHOR("Sachin Kamat <sachin.kamat@samsung.com>");
420 MODULE_DESCRIPTION("SAMSUNG S2MPA01 Regulator Driver");
421 MODULE_LICENSE("GPL");