diff options
Diffstat (limited to 'drivers/power/regulator/lp87565_regulator.c')
-rw-r--r-- | drivers/power/regulator/lp87565_regulator.c | 199 |
1 files changed, 199 insertions, 0 deletions
diff --git a/drivers/power/regulator/lp87565_regulator.c b/drivers/power/regulator/lp87565_regulator.c new file mode 100644 index 0000000000..2a0b8ca642 --- /dev/null +++ b/drivers/power/regulator/lp87565_regulator.c | |||
@@ -0,0 +1,199 @@ | |||
1 | /* | ||
2 | * (C) Copyright 2017 | ||
3 | * Texas Instruments Incorporated, <www.ti.com> | ||
4 | * | ||
5 | * Keerthy <j-keerthy@ti.com> | ||
6 | * | ||
7 | * SPDX-License-Identifier: GPL-2.0+ | ||
8 | */ | ||
9 | |||
10 | #include <common.h> | ||
11 | #include <fdtdec.h> | ||
12 | #include <errno.h> | ||
13 | #include <dm.h> | ||
14 | #include <i2c.h> | ||
15 | #include <power/pmic.h> | ||
16 | #include <power/regulator.h> | ||
17 | #include <power/lp87565.h> | ||
18 | |||
19 | DECLARE_GLOBAL_DATA_PTR; | ||
20 | |||
21 | static const char lp87565_buck_ctrl1[LP87565_BUCK_NUM] = {0x2, 0x4, 0x6, 0x8, 0x2, 0x6}; | ||
22 | static const char lp87565_buck_vout[LP87565_BUCK_NUM] = {0xA, 0xC, 0xE, 0x10, 0xA, 0xE }; | ||
23 | |||
24 | static int lp87565_buck_enable(struct udevice *dev, int op, bool *enable) | ||
25 | { | ||
26 | int ret; | ||
27 | unsigned int adr; | ||
28 | struct dm_regulator_uclass_platdata *uc_pdata; | ||
29 | |||
30 | uc_pdata = dev_get_uclass_platdata(dev); | ||
31 | adr = uc_pdata->ctrl_reg; | ||
32 | |||
33 | ret = pmic_reg_read(dev->parent, adr); | ||
34 | if (ret < 0) | ||
35 | return ret; | ||
36 | |||
37 | if (op == PMIC_OP_GET) { | ||
38 | ret &= LP87565_BUCK_MODE_MASK; | ||
39 | |||
40 | if (ret) | ||
41 | *enable = true; | ||
42 | else | ||
43 | *enable = false; | ||
44 | |||
45 | return 0; | ||
46 | } else if (op == PMIC_OP_SET) { | ||
47 | if (*enable) | ||
48 | ret |= LP87565_BUCK_MODE_MASK; | ||
49 | else | ||
50 | ret &= ~LP87565_BUCK_MODE_MASK; | ||
51 | ret = pmic_reg_write(dev->parent, adr, ret); | ||
52 | if (ret) | ||
53 | return ret; | ||
54 | } | ||
55 | |||
56 | return 0; | ||
57 | } | ||
58 | |||
59 | static int lp87565_buck_volt2val(int uV) | ||
60 | { | ||
61 | if (uV > LP87565_BUCK_VOLT_MAX) | ||
62 | return -EINVAL; | ||
63 | else if (uV > 1400000) | ||
64 | return (uV - 1420000) / 20000 + 0x9E; | ||
65 | else if (uV > 730000) | ||
66 | return (uV - 735000) / 5000 + 0x18; | ||
67 | else if (uV >= 500000) | ||
68 | return (uV - 500000) / 10000; | ||
69 | else | ||
70 | return -EINVAL; | ||
71 | } | ||
72 | |||
73 | static int lp87565_buck_val2volt(int val) | ||
74 | { | ||
75 | if (val > LP87565_BUCK_VOLT_MAX_HEX) | ||
76 | return -EINVAL; | ||
77 | else if (val > 0x9D) | ||
78 | return 1400000 + (val - 0x9D) * 20000; | ||
79 | else if (val > 0x17) | ||
80 | return 730000 + (val - 0x17) * 5000; | ||
81 | else if (val >= 0x0) | ||
82 | return 500000 + val * 10000; | ||
83 | else | ||
84 | return -EINVAL; | ||
85 | } | ||
86 | |||
87 | static int lp87565_buck_val(struct udevice *dev, int op, int *uV) | ||
88 | { | ||
89 | unsigned int hex, adr; | ||
90 | int ret; | ||
91 | struct dm_regulator_uclass_platdata *uc_pdata; | ||
92 | |||
93 | uc_pdata = dev_get_uclass_platdata(dev); | ||
94 | |||
95 | if (op == PMIC_OP_GET) | ||
96 | *uV = 0; | ||
97 | |||
98 | adr = uc_pdata->volt_reg; | ||
99 | |||
100 | ret = pmic_reg_read(dev->parent, adr); | ||
101 | if (ret < 0) | ||
102 | return ret; | ||
103 | |||
104 | if (op == PMIC_OP_GET) { | ||
105 | ret &= LP87565_BUCK_VOLT_MASK; | ||
106 | ret = lp87565_buck_val2volt(ret); | ||
107 | if (ret < 0) | ||
108 | return ret; | ||
109 | *uV = ret; | ||
110 | |||
111 | return 0; | ||
112 | } | ||
113 | |||
114 | hex = lp87565_buck_volt2val(*uV); | ||
115 | if (hex < 0) | ||
116 | return hex; | ||
117 | |||
118 | ret &= 0x0; | ||
119 | ret = hex; | ||
120 | |||
121 | ret = pmic_reg_write(dev->parent, adr, ret); | ||
122 | |||
123 | return ret; | ||
124 | } | ||
125 | |||
126 | static int lp87565_buck_probe(struct udevice *dev) | ||
127 | { | ||
128 | struct dm_regulator_uclass_platdata *uc_pdata; | ||
129 | int idx; | ||
130 | |||
131 | uc_pdata = dev_get_uclass_platdata(dev); | ||
132 | uc_pdata->type = REGULATOR_TYPE_BUCK; | ||
133 | |||
134 | idx = dev->driver_data; | ||
135 | if (idx == 0 || idx == 1 || idx == 2 || idx == 3) { | ||
136 | debug("Single phase regulator\n"); | ||
137 | } else if (idx == 23) { | ||
138 | idx = 5; | ||
139 | } else if (idx == 10) { | ||
140 | idx = 4; | ||
141 | } else { | ||
142 | printf("Wrong ID for regulator\n"); | ||
143 | return -EINVAL; | ||
144 | } | ||
145 | |||
146 | uc_pdata->ctrl_reg = lp87565_buck_ctrl1[idx]; | ||
147 | uc_pdata->volt_reg = lp87565_buck_vout[idx]; | ||
148 | |||
149 | return 0; | ||
150 | } | ||
151 | |||
152 | static int buck_get_value(struct udevice *dev) | ||
153 | { | ||
154 | int uV; | ||
155 | int ret; | ||
156 | |||
157 | ret = lp87565_buck_val(dev, PMIC_OP_GET, &uV); | ||
158 | if (ret) | ||
159 | return ret; | ||
160 | |||
161 | return uV; | ||
162 | } | ||
163 | |||
164 | static int buck_set_value(struct udevice *dev, int uV) | ||
165 | { | ||
166 | return lp87565_buck_val(dev, PMIC_OP_SET, &uV); | ||
167 | } | ||
168 | |||
169 | static bool buck_get_enable(struct udevice *dev) | ||
170 | { | ||
171 | bool enable = false; | ||
172 | int ret; | ||
173 | |||
174 | |||
175 | ret = lp87565_buck_enable(dev, PMIC_OP_GET, &enable); | ||
176 | if (ret) | ||
177 | return ret; | ||
178 | |||
179 | return enable; | ||
180 | } | ||
181 | |||
182 | static int buck_set_enable(struct udevice *dev, bool enable) | ||
183 | { | ||
184 | return lp87565_buck_enable(dev, PMIC_OP_SET, &enable); | ||
185 | } | ||
186 | |||
187 | static const struct dm_regulator_ops lp87565_buck_ops = { | ||
188 | .get_value = buck_get_value, | ||
189 | .set_value = buck_set_value, | ||
190 | .get_enable = buck_get_enable, | ||
191 | .set_enable = buck_set_enable, | ||
192 | }; | ||
193 | |||
194 | U_BOOT_DRIVER(lp87565_buck) = { | ||
195 | .name = LP87565_BUCK_DRIVER, | ||
196 | .id = UCLASS_REGULATOR, | ||
197 | .ops = &lp87565_buck_ops, | ||
198 | .probe = lp87565_buck_probe, | ||
199 | }; | ||