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authorAxel Lin <axel.lin@ingics.com>2012-11-27 21:41:04 -0500
committerMark Brown <broonie@opensource.wolfsonmicro.com>2012-11-28 14:21:00 -0500
commit05cf34c1af48e2e1308a03fbc778039243bebd3a (patch)
treed9b041473e6fd6a3b94ba5e1d870cf8d162b622d /drivers/regulator
parent6b1f8a45666877d4885c03d9472657fd73edfa8b (diff)
regulator: pcf50633: Use linear_min_sel and regulator_[map|list]_voltage_linear
This driver can be converted to use linear_min_sel and regulator_[map|list]_voltage_linear. Below shows the equation (from Datasheet) for each LDOs. For AUTOOUT: VO(prog) = 0.625 + auto_out x 0.025 V; e.g. (00000000 to 00101110: reserved) 00101111: 1.8 V (min) 01010011: 2.7 V 01101010: 3.275 V 01101011: 3.300 V 01101100: 3.325 V 01111111 : 3.800 V (max) The linear mapping start from 0x2f selector. Thus we convert this equation to: VO(prog) = 1.8 + (selector - linear_min_sel) x 0.025 V (min_uV = 1800000, uV_step = 25000, linear_min_sel = 0x2f) For DOWNxOUT: VO(prog) = 0.625 + downx_out x 0.025 V; e.g. 00000000 : 0.625 V (min) 00010111 : 1.200 V 00101111 : 1.800 V 01011111 : 3.000 V (max) For xLDOOUT: VO(prog) = 0.9 + xldo_out x 0.1 V; e.g. 00000: 0.9 V 00001: 1.0 V 11000 : 3.3 V 11011 : 3.6 V Signed-off-by: Axel Lin <axel.lin@ingics.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'drivers/regulator')
-rw-r--r--drivers/regulator/pcf50633-regulator.c176
1 files changed, 28 insertions, 148 deletions
diff --git a/drivers/regulator/pcf50633-regulator.c b/drivers/regulator/pcf50633-regulator.c
index 092e5cb848a1..769272afff2a 100644
--- a/drivers/regulator/pcf50633-regulator.c
+++ b/drivers/regulator/pcf50633-regulator.c
@@ -24,12 +24,15 @@
24#include <linux/mfd/pcf50633/core.h> 24#include <linux/mfd/pcf50633/core.h>
25#include <linux/mfd/pcf50633/pmic.h> 25#include <linux/mfd/pcf50633/pmic.h>
26 26
27#define PCF50633_REGULATOR(_name, _id, _n) \ 27#define PCF50633_REGULATOR(_name, _id, _min_uV, _uV_step, _min_sel, _n) \
28 { \ 28 { \
29 .name = _name, \ 29 .name = _name, \
30 .id = PCF50633_REGULATOR_##_id, \ 30 .id = PCF50633_REGULATOR_##_id, \
31 .ops = &pcf50633_regulator_ops, \ 31 .ops = &pcf50633_regulator_ops, \
32 .n_voltages = _n, \ 32 .n_voltages = _n, \
33 .min_uV = _min_uV, \
34 .uV_step = _uV_step, \
35 .linear_min_sel = _min_sel, \
33 .type = REGULATOR_VOLTAGE, \ 36 .type = REGULATOR_VOLTAGE, \
34 .owner = THIS_MODULE, \ 37 .owner = THIS_MODULE, \
35 .vsel_reg = PCF50633_REG_##_id##OUT, \ 38 .vsel_reg = PCF50633_REG_##_id##OUT, \
@@ -38,162 +41,39 @@
38 .enable_mask = PCF50633_REGULATOR_ON, \ 41 .enable_mask = PCF50633_REGULATOR_ON, \
39 } 42 }
40 43
41/* Bits from voltage value */
42static u8 auto_voltage_bits(unsigned int millivolts)
43{
44 if (millivolts < 1800)
45 return 0x2f;
46 if (millivolts > 3800)
47 return 0xff;
48
49 millivolts -= 625;
50
51 return millivolts / 25;
52}
53
54static u8 down_voltage_bits(unsigned int millivolts)
55{
56 if (millivolts < 625)
57 return 0;
58 else if (millivolts > 3000)
59 return 0xff;
60
61 millivolts -= 625;
62
63 return millivolts / 25;
64}
65
66static u8 ldo_voltage_bits(unsigned int millivolts)
67{
68 if (millivolts < 900)
69 return 0;
70 else if (millivolts > 3600)
71 return 0x1f;
72
73 millivolts -= 900;
74 return millivolts / 100;
75}
76
77/* Obtain voltage value from bits */
78static unsigned int auto_voltage_value(u8 bits)
79{
80 /* AUTOOUT: 00000000 to 00101110 are reserved.
81 * Return 0 for bits in reserved range, which means this selector code
82 * can't be used on this system */
83 if (bits < 0x2f)
84 return 0;
85
86 return 625 + (bits * 25);
87}
88
89
90static unsigned int down_voltage_value(u8 bits)
91{
92 return 625 + (bits * 25);
93}
94
95
96static unsigned int ldo_voltage_value(u8 bits)
97{
98 bits &= 0x1f;
99
100 return 900 + (bits * 100);
101}
102
103static int pcf50633_regulator_map_voltage(struct regulator_dev *rdev,
104 int min_uV, int max_uV)
105{
106 struct pcf50633 *pcf;
107 int regulator_id, millivolts;
108 u8 volt_bits;
109
110 pcf = rdev_get_drvdata(rdev);
111
112 regulator_id = rdev_get_id(rdev);
113 if (regulator_id >= PCF50633_NUM_REGULATORS)
114 return -EINVAL;
115
116 millivolts = min_uV / 1000;
117
118 switch (regulator_id) {
119 case PCF50633_REGULATOR_AUTO:
120 volt_bits = auto_voltage_bits(millivolts);
121 break;
122 case PCF50633_REGULATOR_DOWN1:
123 case PCF50633_REGULATOR_DOWN2:
124 volt_bits = down_voltage_bits(millivolts);
125 break;
126 case PCF50633_REGULATOR_LDO1:
127 case PCF50633_REGULATOR_LDO2:
128 case PCF50633_REGULATOR_LDO3:
129 case PCF50633_REGULATOR_LDO4:
130 case PCF50633_REGULATOR_LDO5:
131 case PCF50633_REGULATOR_LDO6:
132 case PCF50633_REGULATOR_HCLDO:
133 case PCF50633_REGULATOR_MEMLDO:
134 volt_bits = ldo_voltage_bits(millivolts);
135 break;
136 default:
137 return -EINVAL;
138 }
139
140 return volt_bits;
141}
142
143static int pcf50633_regulator_list_voltage(struct regulator_dev *rdev,
144 unsigned int index)
145{
146 int regulator_id = rdev_get_id(rdev);
147
148 int millivolts;
149
150 switch (regulator_id) {
151 case PCF50633_REGULATOR_AUTO:
152 millivolts = auto_voltage_value(index);
153 break;
154 case PCF50633_REGULATOR_DOWN1:
155 case PCF50633_REGULATOR_DOWN2:
156 millivolts = down_voltage_value(index);
157 break;
158 case PCF50633_REGULATOR_LDO1:
159 case PCF50633_REGULATOR_LDO2:
160 case PCF50633_REGULATOR_LDO3:
161 case PCF50633_REGULATOR_LDO4:
162 case PCF50633_REGULATOR_LDO5:
163 case PCF50633_REGULATOR_LDO6:
164 case PCF50633_REGULATOR_HCLDO:
165 case PCF50633_REGULATOR_MEMLDO:
166 millivolts = ldo_voltage_value(index);
167 break;
168 default:
169 return -EINVAL;
170 }
171
172 return millivolts * 1000;
173}
174
175static struct regulator_ops pcf50633_regulator_ops = { 44static struct regulator_ops pcf50633_regulator_ops = {
176 .set_voltage_sel = regulator_set_voltage_sel_regmap, 45 .set_voltage_sel = regulator_set_voltage_sel_regmap,
177 .get_voltage_sel = regulator_get_voltage_sel_regmap, 46 .get_voltage_sel = regulator_get_voltage_sel_regmap,
178 .list_voltage = pcf50633_regulator_list_voltage, 47 .list_voltage = regulator_list_voltage_linear,
179 .map_voltage = pcf50633_regulator_map_voltage, 48 .map_voltage = regulator_map_voltage_linear,
180 .enable = regulator_enable_regmap, 49 .enable = regulator_enable_regmap,
181 .disable = regulator_disable_regmap, 50 .disable = regulator_disable_regmap,
182 .is_enabled = regulator_is_enabled_regmap, 51 .is_enabled = regulator_is_enabled_regmap,
183}; 52};
184 53
185static const struct regulator_desc regulators[] = { 54static const struct regulator_desc regulators[] = {
186 [PCF50633_REGULATOR_AUTO] = PCF50633_REGULATOR("auto", AUTO, 128), 55 [PCF50633_REGULATOR_AUTO] =
187 [PCF50633_REGULATOR_DOWN1] = PCF50633_REGULATOR("down1", DOWN1, 96), 56 PCF50633_REGULATOR("auto", AUTO, 1800000, 25000, 0x2f, 128),
188 [PCF50633_REGULATOR_DOWN2] = PCF50633_REGULATOR("down2", DOWN2, 96), 57 [PCF50633_REGULATOR_DOWN1] =
189 [PCF50633_REGULATOR_LDO1] = PCF50633_REGULATOR("ldo1", LDO1, 28), 58 PCF50633_REGULATOR("down1", DOWN1, 625000, 25000, 0, 96),
190 [PCF50633_REGULATOR_LDO2] = PCF50633_REGULATOR("ldo2", LDO2, 28), 59 [PCF50633_REGULATOR_DOWN2] =
191 [PCF50633_REGULATOR_LDO3] = PCF50633_REGULATOR("ldo3", LDO3, 28), 60 PCF50633_REGULATOR("down2", DOWN2, 625000, 25000, 0, 96),
192 [PCF50633_REGULATOR_LDO4] = PCF50633_REGULATOR("ldo4", LDO4, 28), 61 [PCF50633_REGULATOR_LDO1] =
193 [PCF50633_REGULATOR_LDO5] = PCF50633_REGULATOR("ldo5", LDO5, 28), 62 PCF50633_REGULATOR("ldo1", LDO1, 900000, 100000, 0, 28),
194 [PCF50633_REGULATOR_LDO6] = PCF50633_REGULATOR("ldo6", LDO6, 28), 63 [PCF50633_REGULATOR_LDO2] =
195 [PCF50633_REGULATOR_HCLDO] = PCF50633_REGULATOR("hcldo", HCLDO, 28), 64 PCF50633_REGULATOR("ldo2", LDO2, 900000, 100000, 0, 28),
196 [PCF50633_REGULATOR_MEMLDO] = PCF50633_REGULATOR("memldo", MEMLDO, 28), 65 [PCF50633_REGULATOR_LDO3] =
66 PCF50633_REGULATOR("ldo3", LDO3, 900000, 100000, 0, 28),
67 [PCF50633_REGULATOR_LDO4] =
68 PCF50633_REGULATOR("ldo4", LDO4, 900000, 100000, 0, 28),
69 [PCF50633_REGULATOR_LDO5] =
70 PCF50633_REGULATOR("ldo5", LDO5, 900000, 100000, 0, 28),
71 [PCF50633_REGULATOR_LDO6] =
72 PCF50633_REGULATOR("ldo6", LDO6, 900000, 100000, 0, 28),
73 [PCF50633_REGULATOR_HCLDO] =
74 PCF50633_REGULATOR("hcldo", HCLDO, 900000, 100000, 0, 28),
75 [PCF50633_REGULATOR_MEMLDO] =
76 PCF50633_REGULATOR("memldo", MEMLDO, 900000, 100000, 0, 28),
197}; 77};
198 78
199static int __devinit pcf50633_regulator_probe(struct platform_device *pdev) 79static int __devinit pcf50633_regulator_probe(struct platform_device *pdev)
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-20 02:05:19 -0500