2 * da9211-regulator.c - Regulator device driver for DA9211
3 * Copyright (C) 2014 Dialog Semiconductor Ltd.
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Library General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Library General Public License for more details.
16 #include <linux/err.h>
17 #include <linux/gpio.h>
18 #include <linux/i2c.h>
19 #include <linux/module.h>
20 #include <linux/init.h>
21 #include <linux/slab.h>
22 #include <linux/regulator/driver.h>
23 #include <linux/regulator/machine.h>
24 #include <linux/regmap.h>
25 #include <linux/irq.h>
26 #include <linux/interrupt.h>
27 #include <linux/regulator/da9211.h>
28 #include "da9211-regulator.h"
30 #define DA9211_BUCK_MODE_SLEEP 1
31 #define DA9211_BUCK_MODE_SYNC 2
32 #define DA9211_BUCK_MODE_AUTO 3
34 /* DA9211 REGULATOR IDs */
35 #define DA9211_ID_BUCKA 0
36 #define DA9211_ID_BUCKB 1
40 struct regmap
*regmap
;
41 struct da9211_pdata
*pdata
;
42 struct regulator_dev
*rdev
[DA9211_MAX_REGULATORS
];
47 static const struct regmap_range_cfg da9211_regmap_range
[] = {
49 .selector_reg
= DA9211_REG_PAGE_CON
,
50 .selector_mask
= DA9211_REG_PAGE_MASK
,
51 .selector_shift
= DA9211_REG_PAGE_SHIFT
,
59 static const struct regmap_config da9211_regmap_config
= {
62 .max_register
= 2 * 256,
63 .ranges
= da9211_regmap_range
,
64 .num_ranges
= ARRAY_SIZE(da9211_regmap_range
),
67 /* Default limits measured in millivolts and milliamps */
68 #define DA9211_MIN_MV 300
69 #define DA9211_MAX_MV 1570
70 #define DA9211_STEP_MV 10
72 /* Current limits for buck (uA) indices corresponds with register values */
73 static const int da9211_current_limits
[] = {
74 2000000, 2200000, 2400000, 2600000, 2800000, 3000000, 3200000, 3400000,
75 3600000, 3800000, 4000000, 4200000, 4400000, 4600000, 4800000, 5000000
78 static unsigned int da9211_buck_get_mode(struct regulator_dev
*rdev
)
80 int id
= rdev_get_id(rdev
);
81 struct da9211
*chip
= rdev_get_drvdata(rdev
);
85 ret
= regmap_read(chip
->regmap
, DA9211_REG_BUCKA_CONF
+id
, &data
);
89 switch (data
& 0x03) {
90 case DA9211_BUCK_MODE_SYNC
:
91 mode
= REGULATOR_MODE_FAST
;
93 case DA9211_BUCK_MODE_AUTO
:
94 mode
= REGULATOR_MODE_NORMAL
;
96 case DA9211_BUCK_MODE_SLEEP
:
97 mode
= REGULATOR_MODE_STANDBY
;
104 static int da9211_buck_set_mode(struct regulator_dev
*rdev
,
107 int id
= rdev_get_id(rdev
);
108 struct da9211
*chip
= rdev_get_drvdata(rdev
);
112 case REGULATOR_MODE_FAST
:
113 val
= DA9211_BUCK_MODE_SYNC
;
115 case REGULATOR_MODE_NORMAL
:
116 val
= DA9211_BUCK_MODE_AUTO
;
118 case REGULATOR_MODE_STANDBY
:
119 val
= DA9211_BUCK_MODE_SLEEP
;
123 return regmap_update_bits(chip
->regmap
, DA9211_REG_BUCKA_CONF
+id
,
127 static int da9211_set_current_limit(struct regulator_dev
*rdev
, int min
,
130 int id
= rdev_get_id(rdev
);
131 struct da9211
*chip
= rdev_get_drvdata(rdev
);
134 /* search for closest to maximum */
135 for (i
= ARRAY_SIZE(da9211_current_limits
)-1; i
>= 0; i
--) {
136 if (min
<= da9211_current_limits
[i
] &&
137 max
>= da9211_current_limits
[i
]) {
138 return regmap_update_bits(chip
->regmap
,
139 DA9211_REG_BUCK_ILIM
,
140 (0x0F << id
*4), (i
<< id
*4));
147 static int da9211_get_current_limit(struct regulator_dev
*rdev
)
149 int id
= rdev_get_id(rdev
);
150 struct da9211
*chip
= rdev_get_drvdata(rdev
);
154 ret
= regmap_read(chip
->regmap
, DA9211_REG_BUCK_ILIM
, &data
);
158 /* select one of 16 values: 0000 (2000mA) to 1111 (5000mA) */
159 data
= (data
>> id
*4) & 0x0F;
160 return da9211_current_limits
[data
];
163 static struct regulator_ops da9211_buck_ops
= {
164 .get_mode
= da9211_buck_get_mode
,
165 .set_mode
= da9211_buck_set_mode
,
166 .enable
= regulator_enable_regmap
,
167 .disable
= regulator_disable_regmap
,
168 .is_enabled
= regulator_is_enabled_regmap
,
169 .set_voltage_sel
= regulator_set_voltage_sel_regmap
,
170 .get_voltage_sel
= regulator_get_voltage_sel_regmap
,
171 .list_voltage
= regulator_list_voltage_linear
,
172 .set_current_limit
= da9211_set_current_limit
,
173 .get_current_limit
= da9211_get_current_limit
,
176 #define DA9211_BUCK(_id) \
179 .ops = &da9211_buck_ops,\
180 .type = REGULATOR_VOLTAGE,\
181 .id = DA9211_ID_##_id,\
182 .n_voltages = (DA9211_MAX_MV - DA9211_MIN_MV) / DA9211_STEP_MV + 1,\
183 .min_uV = (DA9211_MIN_MV * 1000),\
184 .uV_step = (DA9211_STEP_MV * 1000),\
185 .enable_reg = DA9211_REG_BUCKA_CONT + DA9211_ID_##_id,\
186 .enable_mask = DA9211_BUCKA_EN,\
187 .vsel_reg = DA9211_REG_VBUCKA_A + DA9211_ID_##_id * 2,\
188 .vsel_mask = DA9211_VBUCK_MASK,\
189 .owner = THIS_MODULE,\
192 static struct regulator_desc da9211_regulators
[] = {
197 static irqreturn_t
da9211_irq_handler(int irq
, void *data
)
199 struct da9211
*chip
= data
;
200 int reg_val
, err
, ret
= IRQ_NONE
;
202 err
= regmap_read(chip
->regmap
, DA9211_REG_EVENT_B
, ®_val
);
206 if (reg_val
& DA9211_E_OV_CURR_A
) {
207 regulator_notifier_call_chain(chip
->rdev
[0],
208 REGULATOR_EVENT_OVER_CURRENT
,
209 rdev_get_drvdata(chip
->rdev
[0]));
211 err
= regmap_write(chip
->regmap
, DA9211_REG_EVENT_B
,
219 if (reg_val
& DA9211_E_OV_CURR_B
) {
220 regulator_notifier_call_chain(chip
->rdev
[1],
221 REGULATOR_EVENT_OVER_CURRENT
,
222 rdev_get_drvdata(chip
->rdev
[1]));
224 err
= regmap_write(chip
->regmap
, DA9211_REG_EVENT_B
,
235 dev_err(chip
->dev
, "I2C error : %d\n", err
);
239 static int da9211_regulator_init(struct da9211
*chip
)
241 struct regulator_config config
= { };
245 ret
= regmap_read(chip
->regmap
, DA9211_REG_CONFIG_E
, &data
);
247 dev_err(chip
->dev
, "Failed to read CONTROL_E reg: %d\n", ret
);
251 data
&= DA9211_SLAVE_SEL
;
252 /* If configuration for 1/2 bucks is different between platform data
253 * and the register, driver should exit.
255 if ((chip
->pdata
->num_buck
== 2 && data
== 0x40)
256 || (chip
->pdata
->num_buck
== 1 && data
== 0x00)) {
258 chip
->num_regulator
= 1;
260 chip
->num_regulator
= 2;
262 dev_err(chip
->dev
, "Configuration is mismatched\n");
266 for (i
= 0; i
< chip
->num_regulator
; i
++) {
269 &(chip
->pdata
->init_data
[i
]);
271 config
.dev
= chip
->dev
;
272 config
.driver_data
= chip
;
273 config
.regmap
= chip
->regmap
;
275 chip
->rdev
[i
] = devm_regulator_register(chip
->dev
,
276 &da9211_regulators
[i
], &config
);
277 if (IS_ERR(chip
->rdev
[i
])) {
279 "Failed to register DA9211 regulator\n");
280 return PTR_ERR(chip
->rdev
[i
]);
283 if (chip
->chip_irq
!= 0) {
284 ret
= regmap_update_bits(chip
->regmap
,
285 DA9211_REG_MASK_B
, DA9211_M_OV_CURR_A
<< i
, 1);
288 "Failed to update mask reg: %d\n", ret
);
297 * I2C driver interface functions
299 static int da9211_i2c_probe(struct i2c_client
*i2c
,
300 const struct i2c_device_id
*id
)
305 chip
= devm_kzalloc(&i2c
->dev
, sizeof(struct da9211
), GFP_KERNEL
);
307 chip
->dev
= &i2c
->dev
;
308 chip
->regmap
= devm_regmap_init_i2c(i2c
, &da9211_regmap_config
);
309 if (IS_ERR(chip
->regmap
)) {
310 error
= PTR_ERR(chip
->regmap
);
311 dev_err(&i2c
->dev
, "Failed to allocate register map: %d\n",
316 i2c_set_clientdata(i2c
, chip
);
318 chip
->pdata
= i2c
->dev
.platform_data
;
320 dev_err(&i2c
->dev
, "No platform init data supplied\n");
324 chip
->chip_irq
= i2c
->irq
;
326 if (chip
->chip_irq
!= 0) {
327 ret
= devm_request_threaded_irq(chip
->dev
, chip
->chip_irq
, NULL
,
329 IRQF_TRIGGER_LOW
|IRQF_ONESHOT
,
332 dev_err(chip
->dev
, "Failed to request IRQ: %d\n",
337 dev_warn(chip
->dev
, "No IRQ configured\n");
340 ret
= da9211_regulator_init(chip
);
343 dev_err(&i2c
->dev
, "Failed to initialize regulator: %d\n", ret
);
348 static const struct i2c_device_id da9211_i2c_id
[] = {
353 MODULE_DEVICE_TABLE(i2c
, da9211_i2c_id
);
355 static struct i2c_driver da9211_regulator_driver
= {
358 .owner
= THIS_MODULE
,
360 .probe
= da9211_i2c_probe
,
361 .id_table
= da9211_i2c_id
,
364 module_i2c_driver(da9211_regulator_driver
);
366 MODULE_AUTHOR("James Ban <James.Ban.opensource@diasemi.com>");
367 MODULE_DESCRIPTION("Regulator device driver for Dialog DA9211");
368 MODULE_LICENSE("GPL v2");