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authorLinus Torvalds <torvalds@linux-foundation.org>2010-10-28 18:13:24 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2010-10-28 18:13:24 -0400
commit9aca0e7c8c3a8f1fa6e3058abc5465b0509f0f8e (patch)
treea905000d066defcc187e8e073134a1bee3c56fc1
parenta0e3390787ef523699ae1f3f3ea0ca953e630be2 (diff)
parentec10b0e94ebe7de3b301d60e6f7f4a12d3d280c6 (diff)
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lrg/voltage-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/lrg/voltage-2.6: regulator: max8952 - fix max8952_set_voltage regulator: max8952 - fix max8952_pmic_probe error path regulator: fix build when CONFIG_REGULATOR_DUMMY=n regulator: avoid deadlock when disabling regulator with supply regulator: Add option for machine drivers to enable the dummy regulator Regulator: lp3972 cleanup Regulator: LP3972 PMIC regulator driver MAX8952 PMIC Driver Initial Release
Diffstat
-rw-r--r--drivers/regulator/Kconfig15
-rw-r--r--drivers/regulator/Makefile5
-rw-r--r--drivers/regulator/core.c57
-rw-r--r--drivers/regulator/dummy.h4
-rw-r--r--drivers/regulator/lp3972.c660
-rw-r--r--drivers/regulator/max8952.c366
-rw-r--r--include/linux/regulator/lp3972.h48
-rw-r--r--include/linux/regulator/machine.h5
-rw-r--r--include/linux/regulator/max8952.h135
9 files changed, 1280 insertions, 15 deletions
diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index 172951bf23a4..dd30e883d4a7 100644
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -100,6 +100,14 @@ config REGULATOR_MAX8925
100 help 100 help
101 Say y here to support the voltage regulaltor of Maxim MAX8925 PMIC. 101 Say y here to support the voltage regulaltor of Maxim MAX8925 PMIC.
102 102
103config REGULATOR_MAX8952
104 tristate "Maxim MAX8952 Power Management IC"
105 depends on I2C
106 help
107 This driver controls a Maxim 8952 voltage output regulator
108 via I2C bus. Maxim 8952 has one voltage output and supports 4 DVS
109 modes ranging from 0.77V to 1.40V by 0.01V steps.
110
103config REGULATOR_MAX8998 111config REGULATOR_MAX8998
104 tristate "Maxim 8998 voltage regulator" 112 tristate "Maxim 8998 voltage regulator"
105 depends on MFD_MAX8998 113 depends on MFD_MAX8998
@@ -164,6 +172,13 @@ config REGULATOR_LP3971
164 Say Y here to support the voltage regulators and convertors 172 Say Y here to support the voltage regulators and convertors
165 on National Semiconductors LP3971 PMIC 173 on National Semiconductors LP3971 PMIC
166 174
175config REGULATOR_LP3972
176 tristate "National Semiconductors LP3972 PMIC regulator driver"
177 depends on I2C
178 help
179 Say Y here to support the voltage regulators and convertors
180 on National Semiconductors LP3972 PMIC
181
167config REGULATOR_PCAP 182config REGULATOR_PCAP
168 tristate "PCAP2 regulator driver" 183 tristate "PCAP2 regulator driver"
169 depends on EZX_PCAP 184 depends on EZX_PCAP
diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile
index 8285fd832e16..bff815736780 100644
--- a/drivers/regulator/Makefile
+++ b/drivers/regulator/Makefile
@@ -3,20 +3,21 @@
3# 3#
4 4
5 5
6obj-$(CONFIG_REGULATOR) += core.o 6obj-$(CONFIG_REGULATOR) += core.o dummy.o
7obj-$(CONFIG_REGULATOR_FIXED_VOLTAGE) += fixed.o 7obj-$(CONFIG_REGULATOR_FIXED_VOLTAGE) += fixed.o
8obj-$(CONFIG_REGULATOR_VIRTUAL_CONSUMER) += virtual.o 8obj-$(CONFIG_REGULATOR_VIRTUAL_CONSUMER) += virtual.o
9obj-$(CONFIG_REGULATOR_USERSPACE_CONSUMER) += userspace-consumer.o 9obj-$(CONFIG_REGULATOR_USERSPACE_CONSUMER) += userspace-consumer.o
10 10
11obj-$(CONFIG_REGULATOR_AD5398) += ad5398.o 11obj-$(CONFIG_REGULATOR_AD5398) += ad5398.o
12obj-$(CONFIG_REGULATOR_BQ24022) += bq24022.o 12obj-$(CONFIG_REGULATOR_BQ24022) += bq24022.o
13obj-$(CONFIG_REGULATOR_DUMMY) += dummy.o
14obj-$(CONFIG_REGULATOR_LP3971) += lp3971.o 13obj-$(CONFIG_REGULATOR_LP3971) += lp3971.o
14obj-$(CONFIG_REGULATOR_LP3972) += lp3972.o
15obj-$(CONFIG_REGULATOR_MAX1586) += max1586.o 15obj-$(CONFIG_REGULATOR_MAX1586) += max1586.o
16obj-$(CONFIG_REGULATOR_TWL4030) += twl-regulator.o 16obj-$(CONFIG_REGULATOR_TWL4030) += twl-regulator.o
17obj-$(CONFIG_REGULATOR_MAX8649) += max8649.o 17obj-$(CONFIG_REGULATOR_MAX8649) += max8649.o
18obj-$(CONFIG_REGULATOR_MAX8660) += max8660.o 18obj-$(CONFIG_REGULATOR_MAX8660) += max8660.o
19obj-$(CONFIG_REGULATOR_MAX8925) += max8925-regulator.o 19obj-$(CONFIG_REGULATOR_MAX8925) += max8925-regulator.o
20obj-$(CONFIG_REGULATOR_MAX8952) += max8952.o
20obj-$(CONFIG_REGULATOR_MAX8998) += max8998.o 21obj-$(CONFIG_REGULATOR_MAX8998) += max8998.o
21obj-$(CONFIG_REGULATOR_WM831X) += wm831x-dcdc.o 22obj-$(CONFIG_REGULATOR_WM831X) += wm831x-dcdc.o
22obj-$(CONFIG_REGULATOR_WM831X) += wm831x-isink.o 23obj-$(CONFIG_REGULATOR_WM831X) += wm831x-isink.o
diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index cc8b337b9119..f1d10c974cd4 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -33,6 +33,7 @@ static DEFINE_MUTEX(regulator_list_mutex);
33static LIST_HEAD(regulator_list); 33static LIST_HEAD(regulator_list);
34static LIST_HEAD(regulator_map_list); 34static LIST_HEAD(regulator_map_list);
35static int has_full_constraints; 35static int has_full_constraints;
36static bool board_wants_dummy_regulator;
36 37
37/* 38/*
38 * struct regulator_map 39 * struct regulator_map
@@ -63,7 +64,8 @@ struct regulator {
63}; 64};
64 65
65static int _regulator_is_enabled(struct regulator_dev *rdev); 66static int _regulator_is_enabled(struct regulator_dev *rdev);
66static int _regulator_disable(struct regulator_dev *rdev); 67static int _regulator_disable(struct regulator_dev *rdev,
68 struct regulator_dev **supply_rdev_ptr);
67static int _regulator_get_voltage(struct regulator_dev *rdev); 69static int _regulator_get_voltage(struct regulator_dev *rdev);
68static int _regulator_get_current_limit(struct regulator_dev *rdev); 70static int _regulator_get_current_limit(struct regulator_dev *rdev);
69static unsigned int _regulator_get_mode(struct regulator_dev *rdev); 71static unsigned int _regulator_get_mode(struct regulator_dev *rdev);
@@ -1108,6 +1110,11 @@ static struct regulator *_regulator_get(struct device *dev, const char *id,
1108 } 1110 }
1109 } 1111 }
1110 1112
1113 if (board_wants_dummy_regulator) {
1114 rdev = dummy_regulator_rdev;
1115 goto found;
1116 }
1117
1111#ifdef CONFIG_REGULATOR_DUMMY 1118#ifdef CONFIG_REGULATOR_DUMMY
1112 if (!devname) 1119 if (!devname)
1113 devname = "deviceless"; 1120 devname = "deviceless";
@@ -1348,7 +1355,8 @@ int regulator_enable(struct regulator *regulator)
1348EXPORT_SYMBOL_GPL(regulator_enable); 1355EXPORT_SYMBOL_GPL(regulator_enable);
1349 1356
1350/* locks held by regulator_disable() */ 1357/* locks held by regulator_disable() */
1351static int _regulator_disable(struct regulator_dev *rdev) 1358static int _regulator_disable(struct regulator_dev *rdev,
1359 struct regulator_dev **supply_rdev_ptr)
1352{ 1360{
1353 int ret = 0; 1361 int ret = 0;
1354 1362
@@ -1376,8 +1384,7 @@ static int _regulator_disable(struct regulator_dev *rdev)
1376 } 1384 }
1377 1385
1378 /* decrease our supplies ref count and disable if required */ 1386 /* decrease our supplies ref count and disable if required */
1379 if (rdev->supply) 1387 *supply_rdev_ptr = rdev->supply;
1380 _regulator_disable(rdev->supply);
1381 1388
1382 rdev->use_count = 0; 1389 rdev->use_count = 0;
1383 } else if (rdev->use_count > 1) { 1390 } else if (rdev->use_count > 1) {
@@ -1407,17 +1414,29 @@ static int _regulator_disable(struct regulator_dev *rdev)
1407int regulator_disable(struct regulator *regulator) 1414int regulator_disable(struct regulator *regulator)
1408{ 1415{
1409 struct regulator_dev *rdev = regulator->rdev; 1416 struct regulator_dev *rdev = regulator->rdev;
1417 struct regulator_dev *supply_rdev = NULL;
1410 int ret = 0; 1418 int ret = 0;
1411 1419
1412 mutex_lock(&rdev->mutex); 1420 mutex_lock(&rdev->mutex);
1413 ret = _regulator_disable(rdev); 1421 ret = _regulator_disable(rdev, &supply_rdev);
1414 mutex_unlock(&rdev->mutex); 1422 mutex_unlock(&rdev->mutex);
1423
1424 /* decrease our supplies ref count and disable if required */
1425 while (supply_rdev != NULL) {
1426 rdev = supply_rdev;
1427
1428 mutex_lock(&rdev->mutex);
1429 _regulator_disable(rdev, &supply_rdev);
1430 mutex_unlock(&rdev->mutex);
1431 }
1432
1415 return ret; 1433 return ret;
1416} 1434}
1417EXPORT_SYMBOL_GPL(regulator_disable); 1435EXPORT_SYMBOL_GPL(regulator_disable);
1418 1436
1419/* locks held by regulator_force_disable() */ 1437/* locks held by regulator_force_disable() */
1420static int _regulator_force_disable(struct regulator_dev *rdev) 1438static int _regulator_force_disable(struct regulator_dev *rdev,
1439 struct regulator_dev **supply_rdev_ptr)
1421{ 1440{
1422 int ret = 0; 1441 int ret = 0;
1423 1442
@@ -1436,8 +1455,7 @@ static int _regulator_force_disable(struct regulator_dev *rdev)
1436 } 1455 }
1437 1456
1438 /* decrease our supplies ref count and disable if required */ 1457 /* decrease our supplies ref count and disable if required */
1439 if (rdev->supply) 1458 *supply_rdev_ptr = rdev->supply;
1440 _regulator_disable(rdev->supply);
1441 1459
1442 rdev->use_count = 0; 1460 rdev->use_count = 0;
1443 return ret; 1461 return ret;
@@ -1454,12 +1472,17 @@ static int _regulator_force_disable(struct regulator_dev *rdev)
1454 */ 1472 */
1455int regulator_force_disable(struct regulator *regulator) 1473int regulator_force_disable(struct regulator *regulator)
1456{ 1474{
1475 struct regulator_dev *supply_rdev = NULL;
1457 int ret; 1476 int ret;
1458 1477
1459 mutex_lock(&regulator->rdev->mutex); 1478 mutex_lock(&regulator->rdev->mutex);
1460 regulator->uA_load = 0; 1479 regulator->uA_load = 0;
1461 ret = _regulator_force_disable(regulator->rdev); 1480 ret = _regulator_force_disable(regulator->rdev, &supply_rdev);
1462 mutex_unlock(&regulator->rdev->mutex); 1481 mutex_unlock(&regulator->rdev->mutex);
1482
1483 if (supply_rdev)
1484 regulator_disable(get_device_regulator(rdev_get_dev(supply_rdev)));
1485
1463 return ret; 1486 return ret;
1464} 1487}
1465EXPORT_SYMBOL_GPL(regulator_force_disable); 1488EXPORT_SYMBOL_GPL(regulator_force_disable);
@@ -2463,6 +2486,22 @@ void regulator_has_full_constraints(void)
2463EXPORT_SYMBOL_GPL(regulator_has_full_constraints); 2486EXPORT_SYMBOL_GPL(regulator_has_full_constraints);
2464 2487
2465/** 2488/**
2489 * regulator_use_dummy_regulator - Provide a dummy regulator when none is found
2490 *
2491 * Calling this function will cause the regulator API to provide a
2492 * dummy regulator to consumers if no physical regulator is found,
2493 * allowing most consumers to proceed as though a regulator were
2494 * configured. This allows systems such as those with software
2495 * controllable regulators for the CPU core only to be brought up more
2496 * readily.
2497 */
2498void regulator_use_dummy_regulator(void)
2499{
2500 board_wants_dummy_regulator = true;
2501}
2502EXPORT_SYMBOL_GPL(regulator_use_dummy_regulator);
2503
2504/**
2466 * rdev_get_drvdata - get rdev regulator driver data 2505 * rdev_get_drvdata - get rdev regulator driver data
2467 * @rdev: regulator 2506 * @rdev: regulator
2468 * 2507 *
diff --git a/drivers/regulator/dummy.h b/drivers/regulator/dummy.h
index 3921c0e24249..97a11b7e8882 100644
--- a/drivers/regulator/dummy.h
+++ b/drivers/regulator/dummy.h
@@ -22,10 +22,6 @@ struct regulator_dev;
22 22
23extern struct regulator_dev *dummy_regulator_rdev; 23extern struct regulator_dev *dummy_regulator_rdev;
24 24
25#ifdef CONFIG_REGULATOR_DUMMY
26void __init regulator_dummy_init(void); 25void __init regulator_dummy_init(void);
27#else
28static inline void regulator_dummy_init(void) { }
29#endif
30 26
31#endif 27#endif
diff --git a/drivers/regulator/lp3972.c b/drivers/regulator/lp3972.c
new file mode 100644
index 000000000000..e07062fd0b42
--- /dev/null
+++ b/drivers/regulator/lp3972.c
@@ -0,0 +1,660 @@
1/*
2 * Regulator driver for National Semiconductors LP3972 PMIC chip
3 *
4 * Based on lp3971.c
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 *
10 */
11
12#include <linux/bug.h>
13#include <linux/err.h>
14#include <linux/i2c.h>
15#include <linux/kernel.h>
16#include <linux/regulator/driver.h>
17#include <linux/regulator/lp3972.h>
18#include <linux/slab.h>
19
20struct lp3972 {
21 struct device *dev;
22 struct mutex io_lock;
23 struct i2c_client *i2c;
24 int num_regulators;
25 struct regulator_dev **rdev;
26};
27
28/* LP3972 Control Registers */
29#define LP3972_SCR_REG 0x07
30#define LP3972_OVER1_REG 0x10
31#define LP3972_OVSR1_REG 0x11
32#define LP3972_OVER2_REG 0x12
33#define LP3972_OVSR2_REG 0x13
34#define LP3972_VCC1_REG 0x20
35#define LP3972_ADTV1_REG 0x23
36#define LP3972_ADTV2_REG 0x24
37#define LP3972_AVRC_REG 0x25
38#define LP3972_CDTC1_REG 0x26
39#define LP3972_CDTC2_REG 0x27
40#define LP3972_SDTV1_REG 0x29
41#define LP3972_SDTV2_REG 0x2A
42#define LP3972_MDTV1_REG 0x32
43#define LP3972_MDTV2_REG 0x33
44#define LP3972_L2VCR_REG 0x39
45#define LP3972_L34VCR_REG 0x3A
46#define LP3972_SCR1_REG 0x80
47#define LP3972_SCR2_REG 0x81
48#define LP3972_OEN3_REG 0x82
49#define LP3972_OSR3_REG 0x83
50#define LP3972_LOER4_REG 0x84
51#define LP3972_B2TV_REG 0x85
52#define LP3972_B3TV_REG 0x86
53#define LP3972_B32RC_REG 0x87
54#define LP3972_ISRA_REG 0x88
55#define LP3972_BCCR_REG 0x89
56#define LP3972_II1RR_REG 0x8E
57#define LP3972_II2RR_REG 0x8F
58
59#define LP3972_SYS_CONTROL1_REG LP3972_SCR1_REG
60/* System control register 1 initial value,
61 * bits 5, 6 and 7 are EPROM programmable */
62#define SYS_CONTROL1_INIT_VAL 0x02
63#define SYS_CONTROL1_INIT_MASK 0x1F
64
65#define LP3972_VOL_CHANGE_REG LP3972_VCC1_REG
66#define LP3972_VOL_CHANGE_FLAG_GO 0x01
67#define LP3972_VOL_CHANGE_FLAG_MASK 0x03
68
69/* LDO output enable mask */
70#define LP3972_OEN3_L1EN BIT(0)
71#define LP3972_OVER2_LDO2_EN BIT(2)
72#define LP3972_OVER2_LDO3_EN BIT(3)
73#define LP3972_OVER2_LDO4_EN BIT(4)
74#define LP3972_OVER1_S_EN BIT(2)
75
76static const int ldo1_voltage_map[] = {
77 1700, 1725, 1750, 1775, 1800, 1825, 1850, 1875,
78 1900, 1925, 1950, 1975, 2000,
79};
80
81static const int ldo23_voltage_map[] = {
82 1800, 1900, 2000, 2100, 2200, 2300, 2400, 2500,
83 2600, 2700, 2800, 2900, 3000, 3100, 3200, 3300,
84};
85
86static const int ldo4_voltage_map[] = {
87 1000, 1050, 1100, 1150, 1200, 1250, 1300, 1350,
88 1400, 1500, 1800, 1900, 2500, 2800, 3000, 3300,
89};
90
91static const int ldo5_voltage_map[] = {
92 0, 0, 0, 0, 0, 850, 875, 900,
93 925, 950, 975, 1000, 1025, 1050, 1075, 1100,
94 1125, 1150, 1175, 1200, 1225, 1250, 1275, 1300,
95 1325, 1350, 1375, 1400, 1425, 1450, 1475, 1500,
96};
97
98static const int buck1_voltage_map[] = {
99 725, 750, 775, 800, 825, 850, 875, 900,
100 925, 950, 975, 1000, 1025, 1050, 1075, 1100,
101 1125, 1150, 1175, 1200, 1225, 1250, 1275, 1300,
102 1325, 1350, 1375, 1400, 1425, 1450, 1475, 1500,
103};
104
105static const int buck23_voltage_map[] = {
106 0, 800, 850, 900, 950, 1000, 1050, 1100,
107 1150, 1200, 1250, 1300, 1350, 1400, 1450, 1500,
108 1550, 1600, 1650, 1700, 1800, 1900, 2500, 2800,
109 3000, 3300,
110};
111
112static const int *ldo_voltage_map[] = {
113 ldo1_voltage_map,
114 ldo23_voltage_map,
115 ldo23_voltage_map,
116 ldo4_voltage_map,
117 ldo5_voltage_map,
118};
119
120static const int *buck_voltage_map[] = {
121 buck1_voltage_map,
122 buck23_voltage_map,
123 buck23_voltage_map,
124};
125
126static const int ldo_output_enable_mask[] = {
127 LP3972_OEN3_L1EN,
128 LP3972_OVER2_LDO2_EN,
129 LP3972_OVER2_LDO3_EN,
130 LP3972_OVER2_LDO4_EN,
131 LP3972_OVER1_S_EN,
132};
133
134static const int ldo_output_enable_addr[] = {
135 LP3972_OEN3_REG,
136 LP3972_OVER2_REG,
137 LP3972_OVER2_REG,
138 LP3972_OVER2_REG,
139 LP3972_OVER1_REG,
140};
141
142static const int ldo_vol_ctl_addr[] = {
143 LP3972_MDTV1_REG,
144 LP3972_L2VCR_REG,
145 LP3972_L34VCR_REG,
146 LP3972_L34VCR_REG,
147 LP3972_SDTV1_REG,
148};
149
150static const int buck_vol_enable_addr[] = {
151 LP3972_OVER1_REG,
152 LP3972_OEN3_REG,
153 LP3972_OEN3_REG,
154};
155
156static const int buck_base_addr[] = {
157 LP3972_ADTV1_REG,
158 LP3972_B2TV_REG,
159 LP3972_B3TV_REG,
160};
161
162#define LP3972_LDO_VOL_VALUE_MAP(x) (ldo_voltage_map[x])
163#define LP3972_LDO_OUTPUT_ENABLE_MASK(x) (ldo_output_enable_mask[x])
164#define LP3972_LDO_OUTPUT_ENABLE_REG(x) (ldo_output_enable_addr[x])
165
166/* LDO voltage control registers shift:
167 LP3972_LDO1 -> 0, LP3972_LDO2 -> 4
168 LP3972_LDO3 -> 0, LP3972_LDO4 -> 4
169 LP3972_LDO5 -> 0
170*/
171#define LP3972_LDO_VOL_CONTR_SHIFT(x) (((x) & 1) << 2)
172#define LP3972_LDO_VOL_CONTR_REG(x) (ldo_vol_ctl_addr[x])
173#define LP3972_LDO_VOL_CHANGE_SHIFT(x) ((x) ? 4 : 6)
174
175#define LP3972_LDO_VOL_MASK(x) (((x) % 4) ? 0x0f : 0x1f)
176#define LP3972_LDO_VOL_MIN_IDX(x) (((x) == 4) ? 0x05 : 0x00)
177#define LP3972_LDO_VOL_MAX_IDX(x) ((x) ? (((x) == 4) ? 0x1f : 0x0f) : 0x0c)
178
179#define LP3972_BUCK_VOL_VALUE_MAP(x) (buck_voltage_map[x])
180#define LP3972_BUCK_VOL_ENABLE_REG(x) (buck_vol_enable_addr[x])
181#define LP3972_BUCK_VOL1_REG(x) (buck_base_addr[x])
182#define LP3972_BUCK_VOL_MASK 0x1f
183#define LP3972_BUCK_VOL_MIN_IDX(x) ((x) ? 0x01 : 0x00)
184#define LP3972_BUCK_VOL_MAX_IDX(x) ((x) ? 0x19 : 0x1f)
185
186static int lp3972_i2c_read(struct i2c_client *i2c, char reg, int count,
187 u16 *dest)
188{
189 int ret;
190
191 if (count != 1)
192 return -EIO;
193 ret = i2c_smbus_read_byte_data(i2c, reg);
194 if (ret < 0)
195 return ret;
196
197 *dest = ret;
198 return 0;
199}
200
201static int lp3972_i2c_write(struct i2c_client *i2c, char reg, int count,
202 const u16 *src)
203{
204 if (count != 1)
205 return -EIO;
206 return i2c_smbus_write_byte_data(i2c, reg, *src);
207}
208
209static u8 lp3972_reg_read(struct lp3972 *lp3972, u8 reg)
210{
211 u16 val = 0;
212
213 mutex_lock(&lp3972->io_lock);
214
215 lp3972_i2c_read(lp3972->i2c, reg, 1, &val);
216
217 dev_dbg(lp3972->dev, "reg read 0x%02x -> 0x%02x\n", (int)reg,
218 (unsigned)val & 0xff);
219
220 mutex_unlock(&lp3972->io_lock);
221
222 return val & 0xff;
223}
224
225static int lp3972_set_bits(struct lp3972 *lp3972, u8 reg, u16 mask, u16 val)
226{
227 u16 tmp;
228 int ret;
229
230 mutex_lock(&lp3972->io_lock);
231
232 ret = lp3972_i2c_read(lp3972->i2c, reg, 1, &tmp);
233 tmp = (tmp & ~mask) | val;
234 if (ret == 0) {
235 ret = lp3972_i2c_write(lp3972->i2c, reg, 1, &tmp);
236 dev_dbg(lp3972->dev, "reg write 0x%02x -> 0x%02x\n", (int)reg,
237 (unsigned)val & 0xff);
238 }
239 mutex_unlock(&lp3972->io_lock);
240
241 return ret;
242}
243
244static int lp3972_ldo_list_voltage(struct regulator_dev *dev, unsigned index)
245{
246 int ldo = rdev_get_id(dev) - LP3972_LDO1;
247 return 1000 * LP3972_LDO_VOL_VALUE_MAP(ldo)[index];
248}
249
250static int lp3972_ldo_is_enabled(struct regulator_dev *dev)
251{
252 struct lp3972 *lp3972 = rdev_get_drvdata(dev);
253 int ldo = rdev_get_id(dev) - LP3972_LDO1;
254 u16 mask = LP3972_LDO_OUTPUT_ENABLE_MASK(ldo);
255 u16 val;
256
257 val = lp3972_reg_read(lp3972, LP3972_LDO_OUTPUT_ENABLE_REG(ldo));
258 return !!(val & mask);
259}
260
261static int lp3972_ldo_enable(struct regulator_dev *dev)
262{
263 struct lp3972 *lp3972 = rdev_get_drvdata(dev);
264 int ldo = rdev_get_id(dev) - LP3972_LDO1;
265 u16 mask = LP3972_LDO_OUTPUT_ENABLE_MASK(ldo);
266
267 return lp3972_set_bits(lp3972, LP3972_LDO_OUTPUT_ENABLE_REG(ldo),
268 mask, mask);
269}
270
271static int lp3972_ldo_disable(struct regulator_dev *dev)
272{
273 struct lp3972 *lp3972 = rdev_get_drvdata(dev);
274 int ldo = rdev_get_id(dev) - LP3972_LDO1;
275 u16 mask = LP3972_LDO_OUTPUT_ENABLE_MASK(ldo);
276
277 return lp3972_set_bits(lp3972, LP3972_LDO_OUTPUT_ENABLE_REG(ldo),
278 mask, 0);
279}
280
281static int lp3972_ldo_get_voltage(struct regulator_dev *dev)
282{
283 struct lp3972 *lp3972 = rdev_get_drvdata(dev);
284 int ldo = rdev_get_id(dev) - LP3972_LDO1;
285 u16 mask = LP3972_LDO_VOL_MASK(ldo);
286 u16 val, reg;
287
288 reg = lp3972_reg_read(lp3972, LP3972_LDO_VOL_CONTR_REG(ldo));
289 val = (reg >> LP3972_LDO_VOL_CONTR_SHIFT(ldo)) & mask;
290
291 return 1000 * LP3972_LDO_VOL_VALUE_MAP(ldo)[val];
292}
293
294static int lp3972_ldo_set_voltage(struct regulator_dev *dev,
295 int min_uV, int max_uV)
296{
297 struct lp3972 *lp3972 = rdev_get_drvdata(dev);
298 int ldo = rdev_get_id(dev) - LP3972_LDO1;
299 int min_vol = min_uV / 1000, max_vol = max_uV / 1000;
300 const int *vol_map = LP3972_LDO_VOL_VALUE_MAP(ldo);
301 u16 val;
302 int shift, ret;
303
304 if (min_vol < vol_map[LP3972_LDO_VOL_MIN_IDX(ldo)] ||
305 min_vol > vol_map[LP3972_LDO_VOL_MAX_IDX(ldo)])
306 return -EINVAL;
307
308 for (val = LP3972_LDO_VOL_MIN_IDX(ldo);
309 val <= LP3972_LDO_VOL_MAX_IDX(ldo); val++)
310 if (vol_map[val] >= min_vol)
311 break;
312
313 if (val > LP3972_LDO_VOL_MAX_IDX(ldo) || vol_map[val] > max_vol)
314 return -EINVAL;
315
316 shift = LP3972_LDO_VOL_CONTR_SHIFT(ldo);
317 ret = lp3972_set_bits(lp3972, LP3972_LDO_VOL_CONTR_REG(ldo),
318 LP3972_LDO_VOL_MASK(ldo) << shift, val << shift);
319
320 if (ret)
321 return ret;
322
323 /*
324 * LDO1 and LDO5 support voltage control by either target voltage1
325 * or target voltage2 register.
326 * We use target voltage1 register for LDO1 and LDO5 in this driver.
327 * We need to update voltage change control register(0x20) to enable
328 * LDO1 and LDO5 to change to their programmed target values.
329 */
330 switch (ldo) {
331 case LP3972_LDO1:
332 case LP3972_LDO5:
333 shift = LP3972_LDO_VOL_CHANGE_SHIFT(ldo);
334 ret = lp3972_set_bits(lp3972, LP3972_VOL_CHANGE_REG,
335 LP3972_VOL_CHANGE_FLAG_MASK << shift,
336 LP3972_VOL_CHANGE_FLAG_GO << shift);
337 if (ret)
338 return ret;
339
340 ret = lp3972_set_bits(lp3972, LP3972_VOL_CHANGE_REG,
341 LP3972_VOL_CHANGE_FLAG_MASK << shift, 0);
342 break;
343 }
344
345 return ret;
346}
347
348static struct regulator_ops lp3972_ldo_ops = {
349 .list_voltage = lp3972_ldo_list_voltage,
350 .is_enabled = lp3972_ldo_is_enabled,
351 .enable = lp3972_ldo_enable,
352 .disable = lp3972_ldo_disable,
353 .get_voltage = lp3972_ldo_get_voltage,
354 .set_voltage = lp3972_ldo_set_voltage,
355};
356
357static int lp3972_dcdc_list_voltage(struct regulator_dev *dev, unsigned index)
358{
359 int buck = rdev_get_id(dev) - LP3972_DCDC1;
360 return 1000 * buck_voltage_map[buck][index];
361}
362
363static int lp3972_dcdc_is_enabled(struct regulator_dev *dev)
364{
365 struct lp3972 *lp3972 = rdev_get_drvdata(dev);
366 int buck = rdev_get_id(dev) - LP3972_DCDC1;
367 u16 mask = 1 << (buck * 2);
368 u16 val;
369
370 val = lp3972_reg_read(lp3972, LP3972_BUCK_VOL_ENABLE_REG(buck));
371 return !!(val & mask);
372}
373
374static int lp3972_dcdc_enable(struct regulator_dev *dev)
375{
376 struct lp3972 *lp3972 = rdev_get_drvdata(dev);
377 int buck = rdev_get_id(dev) - LP3972_DCDC1;
378 u16 mask = 1 << (buck * 2);
379 u16 val;
380
381 val = lp3972_set_bits(lp3972, LP3972_BUCK_VOL_ENABLE_REG(buck),
382 mask, mask);
383 return val;
384}
385
386static int lp3972_dcdc_disable(struct regulator_dev *dev)
387{
388 struct lp3972 *lp3972 = rdev_get_drvdata(dev);
389 int buck = rdev_get_id(dev) - LP3972_DCDC1;
390 u16 mask = 1 << (buck * 2);
391 u16 val;
392
393 val = lp3972_set_bits(lp3972, LP3972_BUCK_VOL_ENABLE_REG(buck),
394 mask, 0);
395 return val;
396}
397
398static int lp3972_dcdc_get_voltage(struct regulator_dev *dev)
399{
400 struct lp3972 *lp3972 = rdev_get_drvdata(dev);
401 int buck = rdev_get_id(dev) - LP3972_DCDC1;
402 u16 reg;
403 int val;
404
405 reg = lp3972_reg_read(lp3972, LP3972_BUCK_VOL1_REG(buck));
406 reg &= LP3972_BUCK_VOL_MASK;
407 if (reg <= LP3972_BUCK_VOL_MAX_IDX(buck))
408 val = 1000 * buck_voltage_map[buck][reg];
409 else {
410 val = 0;
411 dev_warn(&dev->dev, "chip reported incorrect voltage value."
412 " reg = %d\n", reg);
413 }
414
415 return val;
416}
417
418static int lp3972_dcdc_set_voltage(struct regulator_dev *dev,
419 int min_uV, int max_uV)
420{
421 struct lp3972 *lp3972 = rdev_get_drvdata(dev);
422 int buck = rdev_get_id(dev) - LP3972_DCDC1;
423 int min_vol = min_uV / 1000, max_vol = max_uV / 1000;
424 const int *vol_map = buck_voltage_map[buck];
425 u16 val;
426 int ret;
427
428 if (min_vol < vol_map[LP3972_BUCK_VOL_MIN_IDX(buck)] ||
429 min_vol > vol_map[LP3972_BUCK_VOL_MAX_IDX(buck)])
430 return -EINVAL;
431
432 for (val = LP3972_BUCK_VOL_MIN_IDX(buck);
433 val <= LP3972_BUCK_VOL_MAX_IDX(buck); val++)
434 if (vol_map[val] >= min_vol)
435 break;
436
437 if (val > LP3972_BUCK_VOL_MAX_IDX(buck) ||
438 vol_map[val] > max_vol)
439 return -EINVAL;
440
441 ret = lp3972_set_bits(lp3972, LP3972_BUCK_VOL1_REG(buck),
442 LP3972_BUCK_VOL_MASK, val);
443 if (ret)
444 return ret;
445
446 if (buck != 0)
447 return ret;
448
449 ret = lp3972_set_bits(lp3972, LP3972_VOL_CHANGE_REG,
450 LP3972_VOL_CHANGE_FLAG_MASK, LP3972_VOL_CHANGE_FLAG_GO);
451 if (ret)
452 return ret;
453
454 return lp3972_set_bits(lp3972, LP3972_VOL_CHANGE_REG,
455 LP3972_VOL_CHANGE_FLAG_MASK, 0);
456}
457
458static struct regulator_ops lp3972_dcdc_ops = {
459 .list_voltage = lp3972_dcdc_list_voltage,
460 .is_enabled = lp3972_dcdc_is_enabled,
461 .enable = lp3972_dcdc_enable,
462 .disable = lp3972_dcdc_disable,
463 .get_voltage = lp3972_dcdc_get_voltage,
464 .set_voltage = lp3972_dcdc_set_voltage,
465};
466
467static struct regulator_desc regulators[] = {
468 {
469 .name = "LDO1",
470 .id = LP3972_LDO1,
471 .ops = &lp3972_ldo_ops,
472 .n_voltages = ARRAY_SIZE(ldo1_voltage_map),
473 .type = REGULATOR_VOLTAGE,
474 .owner = THIS_MODULE,
475 },
476 {
477 .name = "LDO2",
478 .id = LP3972_LDO2,
479 .ops = &lp3972_ldo_ops,
480 .n_voltages = ARRAY_SIZE(ldo23_voltage_map),
481 .type = REGULATOR_VOLTAGE,
482 .owner = THIS_MODULE,
483 },
484 {
485 .name = "LDO3",
486 .id = LP3972_LDO3,
487 .ops = &lp3972_ldo_ops,
488 .n_voltages = ARRAY_SIZE(ldo23_voltage_map),
489 .type = REGULATOR_VOLTAGE,
490 .owner = THIS_MODULE,
491 },
492 {
493 .name = "LDO4",
494 .id = LP3972_LDO4,
495 .ops = &lp3972_ldo_ops,
496 .n_voltages = ARRAY_SIZE(ldo4_voltage_map),
497 .type = REGULATOR_VOLTAGE,
498 .owner = THIS_MODULE,
499 },
500 {
501 .name = "LDO5",
502 .id = LP3972_LDO5,
503 .ops = &lp3972_ldo_ops,
504 .n_voltages = ARRAY_SIZE(ldo5_voltage_map),
505 .type = REGULATOR_VOLTAGE,
506 .owner = THIS_MODULE,
507 },
508 {
509 .name = "DCDC1",
510 .id = LP3972_DCDC1,
511 .ops = &lp3972_dcdc_ops,
512 .n_voltages = ARRAY_SIZE(buck1_voltage_map),
513 .type = REGULATOR_VOLTAGE,
514 .owner = THIS_MODULE,
515 },
516 {
517 .name = "DCDC2",
518 .id = LP3972_DCDC2,
519 .ops = &lp3972_dcdc_ops,
520 .n_voltages = ARRAY_SIZE(buck23_voltage_map),
521 .type = REGULATOR_VOLTAGE,
522 .owner = THIS_MODULE,
523 },
524 {
525 .name = "DCDC3",
526 .id = LP3972_DCDC3,
527 .ops = &lp3972_dcdc_ops,
528 .n_voltages = ARRAY_SIZE(buck23_voltage_map),
529 .type = REGULATOR_VOLTAGE,
530 .owner = THIS_MODULE,
531 },
532};
533
534static int __devinit setup_regulators(struct lp3972 *lp3972,
535 struct lp3972_platform_data *pdata)
536{
537 int i, err;
538
539 lp3972->num_regulators = pdata->num_regulators;
540 lp3972->rdev = kcalloc(pdata->num_regulators,
541 sizeof(struct regulator_dev *), GFP_KERNEL);
542 if (!lp3972->rdev) {
543 err = -ENOMEM;
544 goto err_nomem;
545 }
546
547 /* Instantiate the regulators */
548 for (i = 0; i < pdata->num_regulators; i++) {
549 struct lp3972_regulator_subdev *reg = &pdata->regulators[i];
550 lp3972->rdev[i] = regulator_register(&regulators[reg->id],
551 lp3972->dev, reg->initdata, lp3972);
552
553 if (IS_ERR(lp3972->rdev[i])) {
554 err = PTR_ERR(lp3972->rdev[i]);
555 dev_err(lp3972->dev, "regulator init failed: %d\n",
556 err);
557 goto error;
558 }
559 }
560
561 return 0;
562error:
563 while (--i >= 0)
564 regulator_unregister(lp3972->rdev[i]);
565 kfree(lp3972->rdev);
566 lp3972->rdev = NULL;
567err_nomem:
568 return err;
569}
570
571static int __devinit lp3972_i2c_probe(struct i2c_client *i2c,
572 const struct i2c_device_id *id)
573{
574 struct lp3972 *lp3972;
575 struct lp3972_platform_data *pdata = i2c->dev.platform_data;
576 int ret;
577 u16 val;
578
579 if (!pdata) {
580 dev_dbg(&i2c->dev, "No platform init data supplied\n");
581 return -ENODEV;
582 }
583
584 lp3972 = kzalloc(sizeof(struct lp3972), GFP_KERNEL);
585 if (!lp3972)
586 return -ENOMEM;
587
588 lp3972->i2c = i2c;
589 lp3972->dev = &i2c->dev;
590
591 mutex_init(&lp3972->io_lock);
592
593 /* Detect LP3972 */
594 ret = lp3972_i2c_read(i2c, LP3972_SYS_CONTROL1_REG, 1, &val);
595 if (ret == 0 &&
596 (val & SYS_CONTROL1_INIT_MASK) != SYS_CONTROL1_INIT_VAL) {
597 ret = -ENODEV;
598 dev_err(&i2c->dev, "chip reported: val = 0x%x\n", val);
599 }
600 if (ret < 0) {
601 dev_err(&i2c->dev, "failed to detect device. ret = %d\n", ret);
602 goto err_detect;
603 }
604
605 ret = setup_regulators(lp3972, pdata);
606 if (ret < 0)
607 goto err_detect;
608
609 i2c_set_clientdata(i2c, lp3972);
610 return 0;
611
612err_detect:
613 kfree(lp3972);
614 return ret;
615}
616
617static int __devexit lp3972_i2c_remove(struct i2c_client *i2c)
618{
619 struct lp3972 *lp3972 = i2c_get_clientdata(i2c);
620 int i;
621
622 for (i = 0; i < lp3972->num_regulators; i++)
623 regulator_unregister(lp3972->rdev[i]);
624 kfree(lp3972->rdev);
625 kfree(lp3972);
626
627 return 0;
628}
629
630static const struct i2c_device_id lp3972_i2c_id[] = {
631 { "lp3972", 0 },
632 { }
633};
634MODULE_DEVICE_TABLE(i2c, lp3972_i2c_id);
635
636static struct i2c_driver lp3972_i2c_driver = {
637 .driver = {
638 .name = "lp3972",
639 .owner = THIS_MODULE,
640 },
641 .probe = lp3972_i2c_probe,
642 .remove = __devexit_p(lp3972_i2c_remove),
643 .id_table = lp3972_i2c_id,
644};
645
646static int __init lp3972_module_init(void)
647{
648 return i2c_add_driver(&lp3972_i2c_driver);
649}
650subsys_initcall(lp3972_module_init);
651
652static void __exit lp3972_module_exit(void)
653{
654 i2c_del_driver(&lp3972_i2c_driver);
655}
656module_exit(lp3972_module_exit);
657
658MODULE_LICENSE("GPL");
659MODULE_AUTHOR("Axel Lin <axel.lin@gmail.com>");
660MODULE_DESCRIPTION("LP3972 PMIC driver");
diff --git a/drivers/regulator/max8952.c b/drivers/regulator/max8952.c
new file mode 100644
index 000000000000..0d5dda4fd911
--- /dev/null
+++ b/drivers/regulator/max8952.c
@@ -0,0 +1,366 @@
1/*
2 * max8952.c - Voltage and current regulation for the Maxim 8952
3 *
4 * Copyright (C) 2010 Samsung Electronics
5 * MyungJoo Ham <myungjoo.ham@samsung.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 */
21
22#include <linux/module.h>
23#include <linux/init.h>
24#include <linux/i2c.h>
25#include <linux/err.h>
26#include <linux/platform_device.h>
27#include <linux/regulator/driver.h>
28#include <linux/regulator/max8952.h>
29#include <linux/mutex.h>
30#include <linux/gpio.h>
31#include <linux/io.h>
32#include <linux/slab.h>
33
34/* Registers */
35enum {
36 MAX8952_REG_MODE0,
37 MAX8952_REG_MODE1,
38 MAX8952_REG_MODE2,
39 MAX8952_REG_MODE3,
40 MAX8952_REG_CONTROL,
41 MAX8952_REG_SYNC,
42 MAX8952_REG_RAMP,
43 MAX8952_REG_CHIP_ID1,
44 MAX8952_REG_CHIP_ID2,
45};
46
47struct max8952_data {
48 struct i2c_client *client;
49 struct device *dev;
50 struct mutex mutex;
51 struct max8952_platform_data *pdata;
52 struct regulator_dev *rdev;
53
54 bool vid0;
55 bool vid1;
56 bool en;
57};
58
59static int max8952_read_reg(struct max8952_data *max8952, u8 reg)
60{
61 int ret = i2c_smbus_read_byte_data(max8952->client, reg);
62 if (ret > 0)
63 ret &= 0xff;
64
65 return ret;
66}
67
68static int max8952_write_reg(struct max8952_data *max8952,
69 u8 reg, u8 value)
70{
71 return i2c_smbus_write_byte_data(max8952->client, reg, value);
72}
73
74static int max8952_voltage(struct max8952_data *max8952, u8 mode)
75{
76 return (max8952->pdata->dvs_mode[mode] * 10 + 770) * 1000;
77}
78
79static int max8952_list_voltage(struct regulator_dev *rdev,
80 unsigned int selector)
81{
82 struct max8952_data *max8952 = rdev_get_drvdata(rdev);
83
84 if (rdev_get_id(rdev) != 0)
85 return -EINVAL;
86
87 return max8952_voltage(max8952, selector);
88}
89
90static int max8952_is_enabled(struct regulator_dev *rdev)
91{
92 struct max8952_data *max8952 = rdev_get_drvdata(rdev);
93 return max8952->en;
94}
95
96static int max8952_enable(struct regulator_dev *rdev)
97{
98 struct max8952_data *max8952 = rdev_get_drvdata(rdev);
99
100 /* If not valid, assume "ALWAYS_HIGH" */
101 if (gpio_is_valid(max8952->pdata->gpio_en))
102 gpio_set_value(max8952->pdata->gpio_en, 1);
103
104 max8952->en = true;
105 return 0;
106}
107
108static int max8952_disable(struct regulator_dev *rdev)
109{
110 struct max8952_data *max8952 = rdev_get_drvdata(rdev);
111
112 /* If not valid, assume "ALWAYS_HIGH" -> not permitted */
113 if (gpio_is_valid(max8952->pdata->gpio_en))
114 gpio_set_value(max8952->pdata->gpio_en, 0);
115 else
116 return -EPERM;
117
118 max8952->en = false;
119 return 0;
120}
121
122static int max8952_get_voltage(struct regulator_dev *rdev)
123{
124 struct max8952_data *max8952 = rdev_get_drvdata(rdev);
125 u8 vid = 0;
126
127 if (max8952->vid0)
128 vid += 1;
129 if (max8952->vid1)
130 vid += 2;
131
132 return max8952_voltage(max8952, vid);
133}
134
135static int max8952_set_voltage(struct regulator_dev *rdev,
136 int min_uV, int max_uV)
137{
138 struct max8952_data *max8952 = rdev_get_drvdata(rdev);
139 s8 vid = -1, i;
140
141 if (!gpio_is_valid(max8952->pdata->gpio_vid0) ||
142 !gpio_is_valid(max8952->pdata->gpio_vid0)) {
143 /* DVS not supported */
144 return -EPERM;
145 }
146
147 for (i = 0; i < MAX8952_NUM_DVS_MODE; i++) {
148 int volt = max8952_voltage(max8952, i);
149
150 /* Set the voltage as low as possible within the range */
151 if (volt <= max_uV && volt >= min_uV)
152 if (vid == -1 || max8952_voltage(max8952, vid) > volt)
153 vid = i;
154 }
155
156 if (vid >= 0 && vid < MAX8952_NUM_DVS_MODE) {
157 max8952->vid0 = (vid % 2 == 1);
158 max8952->vid1 = (((vid >> 1) % 2) == 1);
159 gpio_set_value(max8952->pdata->gpio_vid0, max8952->vid0);
160 gpio_set_value(max8952->pdata->gpio_vid1, max8952->vid1);
161 } else
162 return -EINVAL;
163
164 return 0;
165}
166
167static struct regulator_ops max8952_ops = {
168 .list_voltage = max8952_list_voltage,
169 .is_enabled = max8952_is_enabled,
170 .enable = max8952_enable,
171 .disable = max8952_disable,
172 .get_voltage = max8952_get_voltage,
173 .set_voltage = max8952_set_voltage,
174 .set_suspend_disable = max8952_disable,
175};
176
177static struct regulator_desc regulator = {
178 .name = "MAX8952_VOUT",
179 .id = 0,
180 .n_voltages = MAX8952_NUM_DVS_MODE,
181 .ops = &max8952_ops,
182 .type = REGULATOR_VOLTAGE,
183 .owner = THIS_MODULE,
184};
185
186static int __devinit max8952_pmic_probe(struct i2c_client *client,
187 const struct i2c_device_id *i2c_id)
188{
189 struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
190 struct max8952_platform_data *pdata = client->dev.platform_data;
191 struct max8952_data *max8952;
192
193 int ret = 0, err = 0;
194
195 if (!pdata) {
196 dev_err(&client->dev, "Require the platform data\n");
197 return -EINVAL;
198 }
199
200 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE))
201 return -EIO;
202
203 max8952 = kzalloc(sizeof(struct max8952_data), GFP_KERNEL);
204 if (!max8952)
205 return -ENOMEM;
206
207 max8952->client = client;
208 max8952->dev = &client->dev;
209 max8952->pdata = pdata;
210 mutex_init(&max8952->mutex);
211
212 max8952->rdev = regulator_register(&regulator, max8952->dev,
213 &pdata->reg_data, max8952);
214
215 if (IS_ERR(max8952->rdev)) {
216 ret = PTR_ERR(max8952->rdev);
217 dev_err(max8952->dev, "regulator init failed (%d)\n", ret);
218 goto err_reg;
219 }
220
221 max8952->en = !!(pdata->reg_data.constraints.boot_on);
222 max8952->vid0 = (pdata->default_mode % 2) == 1;
223 max8952->vid1 = ((pdata->default_mode >> 1) % 2) == 1;
224
225 if (gpio_is_valid(pdata->gpio_en)) {
226 if (!gpio_request(pdata->gpio_en, "MAX8952 EN"))
227 gpio_direction_output(pdata->gpio_en, max8952->en);
228 else
229 err = 1;
230 } else
231 err = 2;
232
233 if (err) {
234 dev_info(max8952->dev, "EN gpio invalid: assume that EN"
235 "is always High\n");
236 max8952->en = 1;
237 pdata->gpio_en = -1; /* Mark invalid */
238 }
239
240 err = 0;
241
242 if (gpio_is_valid(pdata->gpio_vid0) &&
243 gpio_is_valid(pdata->gpio_vid1)) {
244 if (!gpio_request(pdata->gpio_vid0, "MAX8952 VID0"))
245 gpio_direction_output(pdata->gpio_vid0,
246 (pdata->default_mode) % 2);
247 else
248 err = 1;
249
250 if (!gpio_request(pdata->gpio_vid1, "MAX8952 VID1"))
251 gpio_direction_output(pdata->gpio_vid1,
252 (pdata->default_mode >> 1) % 2);
253 else {
254 if (!err)
255 gpio_free(pdata->gpio_vid0);
256 err = 2;
257 }
258
259 } else
260 err = 3;
261
262 if (err) {
263 dev_warn(max8952->dev, "VID0/1 gpio invalid: "
264 "DVS not avilable.\n");
265 max8952->vid0 = 0;
266 max8952->vid1 = 0;
267 /* Mark invalid */
268 pdata->gpio_vid0 = -1;
269 pdata->gpio_vid1 = -1;
270
271 /* Disable Pulldown of EN only */
272 max8952_write_reg(max8952, MAX8952_REG_CONTROL, 0x60);
273
274 dev_err(max8952->dev, "DVS modes disabled because VID0 and VID1"
275 " do not have proper controls.\n");
276 } else {
277 /*
278 * Disable Pulldown on EN, VID0, VID1 to reduce
279 * leakage current of MAX8952 assuming that MAX8952
280 * is turned on (EN==1). Note that without having VID0/1
281 * properly connected, turning pulldown off can be
282 * problematic. Thus, turn this off only when they are
283 * controllable by GPIO.
284 */
285 max8952_write_reg(max8952, MAX8952_REG_CONTROL, 0x0);
286 }
287
288 max8952_write_reg(max8952, MAX8952_REG_MODE0,
289 (max8952_read_reg(max8952,
290 MAX8952_REG_MODE0) & 0xC0) |
291 (pdata->dvs_mode[0] & 0x3F));
292 max8952_write_reg(max8952, MAX8952_REG_MODE1,
293 (max8952_read_reg(max8952,
294 MAX8952_REG_MODE1) & 0xC0) |
295 (pdata->dvs_mode[1] & 0x3F));
296 max8952_write_reg(max8952, MAX8952_REG_MODE2,
297 (max8952_read_reg(max8952,
298 MAX8952_REG_MODE2) & 0xC0) |
299 (pdata->dvs_mode[2] & 0x3F));
300 max8952_write_reg(max8952, MAX8952_REG_MODE3,
301 (max8952_read_reg(max8952,
302 MAX8952_REG_MODE3) & 0xC0) |
303 (pdata->dvs_mode[3] & 0x3F));
304
305 max8952_write_reg(max8952, MAX8952_REG_SYNC,
306 (max8952_read_reg(max8952, MAX8952_REG_SYNC) & 0x3F) |
307 ((pdata->sync_freq & 0x3) << 6));
308 max8952_write_reg(max8952, MAX8952_REG_RAMP,
309 (max8952_read_reg(max8952, MAX8952_REG_RAMP) & 0x1F) |
310 ((pdata->ramp_speed & 0x7) << 5));
311
312 i2c_set_clientdata(client, max8952);
313
314 return 0;
315
316err_reg:
317 kfree(max8952);
318 return ret;
319}
320
321static int __devexit max8952_pmic_remove(struct i2c_client *client)
322{
323 struct max8952_data *max8952 = i2c_get_clientdata(client);
324 struct max8952_platform_data *pdata = max8952->pdata;
325 struct regulator_dev *rdev = max8952->rdev;
326
327 regulator_unregister(rdev);
328
329 gpio_free(pdata->gpio_vid0);
330 gpio_free(pdata->gpio_vid1);
331 gpio_free(pdata->gpio_en);
332
333 kfree(max8952);
334 return 0;
335}
336
337static const struct i2c_device_id max8952_ids[] = {
338 { "max8952", 0 },
339 { },
340};
341MODULE_DEVICE_TABLE(i2c, max8952_ids);
342
343static struct i2c_driver max8952_pmic_driver = {
344 .probe = max8952_pmic_probe,
345 .remove = __devexit_p(max8952_pmic_remove),
346 .driver = {
347 .name = "max8952",
348 },
349 .id_table = max8952_ids,
350};
351
352static int __init max8952_pmic_init(void)
353{
354 return i2c_add_driver(&max8952_pmic_driver);
355}
356subsys_initcall(max8952_pmic_init);
357
358static void __exit max8952_pmic_exit(void)
359{
360 i2c_del_driver(&max8952_pmic_driver);
361}
362module_exit(max8952_pmic_exit);
363
364MODULE_DESCRIPTION("MAXIM 8952 voltage regulator driver");
365MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>");
366MODULE_LICENSE("GPL");
diff --git a/include/linux/regulator/lp3972.h b/include/linux/regulator/lp3972.h
new file mode 100644
index 000000000000..9bb7389b7a1e
--- /dev/null
+++ b/include/linux/regulator/lp3972.h
@@ -0,0 +1,48 @@
1/*
2 * National Semiconductors LP3972 PMIC chip client interface
3 *
4 * Based on lp3971.h
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19 */
20
21#ifndef __LINUX_REGULATOR_LP3972_H
22#define __LINUX_REGULATOR_LP3972_H
23
24#include <linux/regulator/machine.h>
25
26#define LP3972_LDO1 0
27#define LP3972_LDO2 1
28#define LP3972_LDO3 2
29#define LP3972_LDO4 3
30#define LP3972_LDO5 4
31
32#define LP3972_DCDC1 5
33#define LP3972_DCDC2 6
34#define LP3972_DCDC3 7
35
36#define LP3972_NUM_REGULATORS 8
37
38struct lp3972_regulator_subdev {
39 int id;
40 struct regulator_init_data *initdata;
41};
42
43struct lp3972_platform_data {
44 int num_regulators;
45 struct lp3972_regulator_subdev *regulators;
46};
47
48#endif
diff --git a/include/linux/regulator/machine.h b/include/linux/regulator/machine.h
index e2980287245e..761c745b9c24 100644
--- a/include/linux/regulator/machine.h
+++ b/include/linux/regulator/machine.h
@@ -189,10 +189,15 @@ int regulator_suspend_prepare(suspend_state_t state);
189 189
190#ifdef CONFIG_REGULATOR 190#ifdef CONFIG_REGULATOR
191void regulator_has_full_constraints(void); 191void regulator_has_full_constraints(void);
192void regulator_use_dummy_regulator(void);
192#else 193#else
193static inline void regulator_has_full_constraints(void) 194static inline void regulator_has_full_constraints(void)
194{ 195{
195} 196}
197
198static inline void regulator_use_dummy_regulator(void)
199{
200}
196#endif 201#endif
197 202
198#endif 203#endif
diff --git a/include/linux/regulator/max8952.h b/include/linux/regulator/max8952.h
new file mode 100644
index 000000000000..45e42855ad05
--- /dev/null
+++ b/include/linux/regulator/max8952.h
@@ -0,0 +1,135 @@
1/*
2 * max8952.h - Voltage regulation for the Maxim 8952
3 *
4 * Copyright (C) 2010 Samsung Electrnoics
5 * MyungJoo Ham <myungjoo.ham@samsung.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20 */
21
22#ifndef REGULATOR_MAX8952
23#define REGULATOR_MAX8952
24
25#include <linux/regulator/machine.h>
26
27enum {
28 MAX8952_DVS_MODE0,
29 MAX8952_DVS_MODE1,
30 MAX8952_DVS_MODE2,
31 MAX8952_DVS_MODE3,
32};
33
34enum {
35 MAX8952_DVS_770mV = 0,
36 MAX8952_DVS_780mV,
37 MAX8952_DVS_790mV,
38 MAX8952_DVS_800mV,
39 MAX8952_DVS_810mV,
40 MAX8952_DVS_820mV,
41 MAX8952_DVS_830mV,
42 MAX8952_DVS_840mV,
43 MAX8952_DVS_850mV,
44 MAX8952_DVS_860mV,
45 MAX8952_DVS_870mV,
46 MAX8952_DVS_880mV,
47 MAX8952_DVS_890mV,
48 MAX8952_DVS_900mV,
49 MAX8952_DVS_910mV,
50 MAX8952_DVS_920mV,
51 MAX8952_DVS_930mV,
52 MAX8952_DVS_940mV,
53 MAX8952_DVS_950mV,
54 MAX8952_DVS_960mV,
55 MAX8952_DVS_970mV,
56 MAX8952_DVS_980mV,
57 MAX8952_DVS_990mV,
58 MAX8952_DVS_1000mV,
59 MAX8952_DVS_1010mV,
60 MAX8952_DVS_1020mV,
61 MAX8952_DVS_1030mV,
62 MAX8952_DVS_1040mV,
63 MAX8952_DVS_1050mV,
64 MAX8952_DVS_1060mV,
65 MAX8952_DVS_1070mV,
66 MAX8952_DVS_1080mV,
67 MAX8952_DVS_1090mV,
68 MAX8952_DVS_1100mV,
69 MAX8952_DVS_1110mV,
70 MAX8952_DVS_1120mV,
71 MAX8952_DVS_1130mV,
72 MAX8952_DVS_1140mV,
73 MAX8952_DVS_1150mV,
74 MAX8952_DVS_1160mV,
75 MAX8952_DVS_1170mV,
76 MAX8952_DVS_1180mV,
77 MAX8952_DVS_1190mV,
78 MAX8952_DVS_1200mV,
79 MAX8952_DVS_1210mV,
80 MAX8952_DVS_1220mV,
81 MAX8952_DVS_1230mV,
82 MAX8952_DVS_1240mV,
83 MAX8952_DVS_1250mV,
84 MAX8952_DVS_1260mV,
85 MAX8952_DVS_1270mV,
86 MAX8952_DVS_1280mV,
87 MAX8952_DVS_1290mV,
88 MAX8952_DVS_1300mV,
89 MAX8952_DVS_1310mV,
90 MAX8952_DVS_1320mV,
91 MAX8952_DVS_1330mV,
92 MAX8952_DVS_1340mV,
93 MAX8952_DVS_1350mV,
94 MAX8952_DVS_1360mV,
95 MAX8952_DVS_1370mV,
96 MAX8952_DVS_1380mV,
97 MAX8952_DVS_1390mV,
98 MAX8952_DVS_1400mV,
99};
100
101enum {
102 MAX8952_SYNC_FREQ_26MHZ, /* Default */
103 MAX8952_SYNC_FREQ_13MHZ,
104 MAX8952_SYNC_FREQ_19_2MHZ,
105};
106
107enum {
108 MAX8952_RAMP_32mV_us = 0, /* Default */
109 MAX8952_RAMP_16mV_us,
110 MAX8952_RAMP_8mV_us,
111 MAX8952_RAMP_4mV_us,
112 MAX8952_RAMP_2mV_us,
113 MAX8952_RAMP_1mV_us,
114 MAX8952_RAMP_0_5mV_us,
115 MAX8952_RAMP_0_25mV_us,
116};
117
118#define MAX8952_NUM_DVS_MODE 4
119
120struct max8952_platform_data {
121 int gpio_vid0;
122 int gpio_vid1;
123 int gpio_en;
124
125 u8 default_mode;
126 u8 dvs_mode[MAX8952_NUM_DVS_MODE]; /* MAX8952_DVS_MODEx_XXXXmV */
127
128 u8 sync_freq;
129 u8 ramp_speed;
130
131 struct regulator_init_data reg_data;
132};
133
134
135#endif /* REGULATOR_MAX8952 */
generated by cgit v1.2.2 (git 2.25.0) at 2025-06-11 03:48:13 -0400