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5
6#include <common.h>
7#include <dm.h>
8#include <asm/io.h>
9#include <dm/device_compat.h>
10#include <power/regulator.h>
11
12#define REG_VSRCR 0xf08000e8
13
14
15static const u32 volts_type1[] = { 3300000, 1800000 };
16static const u32 volts_type2[] = { 1000000, 1800000 };
17#define VOLT_LEV0 0
18#define VOLT_LEV1 1
19
20struct volt_supply {
21 char *name;
22 const u32 *volts;
23 u32 reg_shift;
24};
25
26static const struct volt_supply npcm8xx_volt_supps[] = {
27 {"v1", volts_type1, 0},
28 {"v2", volts_type1, 1},
29 {"v3", volts_type1, 2},
30 {"v4", volts_type1, 3},
31 {"v5", volts_type1, 4},
32 {"v6", volts_type1, 5},
33 {"v7", volts_type1, 6},
34 {"v8", volts_type1, 7},
35 {"v9", volts_type1, 8},
36 {"v10", volts_type1, 9},
37 {"v11", volts_type2, 10},
38 {"v12", volts_type1, 11},
39 {"v13", volts_type1, 12},
40 {"v14", volts_type2, 13},
41 {"vsif", volts_type1, 14},
42 {"vr2", volts_type1, 30},
43};
44
45static const struct volt_supply *npcm8xx_volt_supply_get(const char *name)
46{
47 int i;
48
49 for (i = 0; i < ARRAY_SIZE(npcm8xx_volt_supps); i++) {
50 if (!strcmp(npcm8xx_volt_supps[i].name, name))
51 return &npcm8xx_volt_supps[i];
52 }
53
54 return NULL;
55}
56
57static int npcm8xx_regulator_set_value(struct udevice *dev, int uV)
58{
59 struct dm_regulator_uclass_plat *uc_pdata;
60 const struct volt_supply *supp;
61 u32 val, level;
62
63 uc_pdata = dev_get_uclass_plat(dev);
64 if (!uc_pdata)
65 return -ENXIO;
66
67 dev_dbg(dev, "%s set_value: %d\n", uc_pdata->name, uV);
68 supp = npcm8xx_volt_supply_get(uc_pdata->name);
69 if (!supp)
70 return -ENOENT;
71
72 if (uV == supp->volts[VOLT_LEV0])
73 level = VOLT_LEV0;
74 else if (uV == supp->volts[VOLT_LEV1])
75 level = VOLT_LEV1;
76 else
77 return -EINVAL;
78
79
80 val = readl(REG_VSRCR);
81 val &= ~BIT(supp->reg_shift);
82 val |= level << supp->reg_shift;
83 writel(val, REG_VSRCR);
84
85 return 0;
86}
87
88static int npcm8xx_regulator_get_value(struct udevice *dev)
89{
90 struct dm_regulator_uclass_plat *uc_pdata;
91 const struct volt_supply *supp;
92 u32 val;
93
94 uc_pdata = dev_get_uclass_plat(dev);
95 if (!uc_pdata)
96 return -ENXIO;
97
98 supp = npcm8xx_volt_supply_get(uc_pdata->name);
99 if (!supp)
100 return -ENOENT;
101
102 val = readl(REG_VSRCR) & BIT(supp->reg_shift);
103
104 dev_dbg(dev, "%s get_value: %d\n", uc_pdata->name,
105 val ? supp->volts[VOLT_LEV1] : supp->volts[VOLT_LEV0]);
106
107 return val ? supp->volts[VOLT_LEV1] : supp->volts[VOLT_LEV0];
108}
109
110static int npcm8xx_regulator_set_enable(struct udevice *dev, bool enable)
111{
112
113 return 0;
114}
115
116static const struct dm_regulator_ops npcm8xx_regulator_ops = {
117 .set_value = npcm8xx_regulator_set_value,
118 .get_value = npcm8xx_regulator_get_value,
119 .set_enable = npcm8xx_regulator_set_enable,
120};
121
122static const struct udevice_id npcm8xx_regulator_ids[] = {
123 { .compatible = "regulator-npcm845" },
124 { },
125};
126
127U_BOOT_DRIVER(regulator_npcm8xx) = {
128 .name = "regulator_npcm845",
129 .id = UCLASS_REGULATOR,
130 .ops = &npcm8xx_regulator_ops,
131 .of_match = npcm8xx_regulator_ids,
132};
133