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1 | /* | |
2 | * Copyright (C) 2015 Google, Inc | |
3 | * Written by Simon Glass <[email protected]> | |
4 | * | |
5 | * SPDX-License-Identifier: GPL-2.0+ | |
6 | */ | |
7 | ||
8 | #include <common.h> | |
9 | #include <dm.h> | |
10 | #include <errno.h> | |
11 | #include <fdtdec.h> | |
12 | #include <libfdt.h> | |
13 | #include <power/rk8xx_pmic.h> | |
14 | #include <power/pmic.h> | |
15 | ||
16 | DECLARE_GLOBAL_DATA_PTR; | |
17 | ||
18 | static const struct pmic_child_info pmic_children_info[] = { | |
19 | { .prefix = "DCDC_REG", .driver = "rk8xx_buck"}, | |
20 | { .prefix = "LDO_REG", .driver = "rk8xx_ldo"}, | |
21 | { .prefix = "SWITCH_REG", .driver = "rk8xx_switch"}, | |
22 | { }, | |
23 | }; | |
24 | ||
25 | static int rk8xx_reg_count(struct udevice *dev) | |
26 | { | |
27 | return RK808_NUM_OF_REGS; | |
28 | } | |
29 | ||
30 | static int rk8xx_write(struct udevice *dev, uint reg, const uint8_t *buff, | |
31 | int len) | |
32 | { | |
33 | int ret; | |
34 | ||
35 | ret = dm_i2c_write(dev, reg, buff, len); | |
36 | if (ret) { | |
37 | debug("write error to device: %p register: %#x!", dev, reg); | |
38 | return ret; | |
39 | } | |
40 | ||
41 | return 0; | |
42 | } | |
43 | ||
44 | static int rk8xx_read(struct udevice *dev, uint reg, uint8_t *buff, int len) | |
45 | { | |
46 | int ret; | |
47 | ||
48 | ret = dm_i2c_read(dev, reg, buff, len); | |
49 | if (ret) { | |
50 | debug("read error from device: %p register: %#x!", dev, reg); | |
51 | return ret; | |
52 | } | |
53 | ||
54 | return 0; | |
55 | } | |
56 | ||
57 | #if CONFIG_IS_ENABLED(PMIC_CHILDREN) | |
58 | static int rk8xx_bind(struct udevice *dev) | |
59 | { | |
60 | ofnode regulators_node; | |
61 | int children; | |
62 | ||
63 | regulators_node = dev_read_subnode(dev, "regulators"); | |
64 | if (!ofnode_valid(regulators_node)) { | |
65 | debug("%s: %s regulators subnode not found!", __func__, | |
66 | dev->name); | |
67 | return -ENXIO; | |
68 | } | |
69 | ||
70 | debug("%s: '%s' - found regulators subnode\n", __func__, dev->name); | |
71 | ||
72 | children = pmic_bind_children(dev, regulators_node, pmic_children_info); | |
73 | if (!children) | |
74 | debug("%s: %s - no child found\n", __func__, dev->name); | |
75 | ||
76 | /* Always return success for this device */ | |
77 | return 0; | |
78 | } | |
79 | #endif | |
80 | ||
81 | static int rk8xx_probe(struct udevice *dev) | |
82 | { | |
83 | struct rk8xx_priv *priv = dev_get_priv(dev); | |
84 | uint8_t msb, lsb; | |
85 | ||
86 | /* read Chip variant */ | |
87 | rk8xx_read(dev, ID_MSB, &msb, 1); | |
88 | rk8xx_read(dev, ID_LSB, &lsb, 1); | |
89 | ||
90 | priv->variant = ((msb << 8) | lsb) & RK8XX_ID_MSK; | |
91 | ||
92 | return 0; | |
93 | } | |
94 | ||
95 | static struct dm_pmic_ops rk8xx_ops = { | |
96 | .reg_count = rk8xx_reg_count, | |
97 | .read = rk8xx_read, | |
98 | .write = rk8xx_write, | |
99 | }; | |
100 | ||
101 | static const struct udevice_id rk8xx_ids[] = { | |
102 | { .compatible = "rockchip,rk808" }, | |
103 | { .compatible = "rockchip,rk818" }, | |
104 | { } | |
105 | }; | |
106 | ||
107 | U_BOOT_DRIVER(pmic_rk8xx) = { | |
108 | .name = "rk8xx pmic", | |
109 | .id = UCLASS_PMIC, | |
110 | .of_match = rk8xx_ids, | |
111 | #if CONFIG_IS_ENABLED(PMIC_CHILDREN) | |
112 | .bind = rk8xx_bind, | |
113 | #endif | |
114 | .probe = rk8xx_probe, | |
115 | .ops = &rk8xx_ops, | |
116 | }; |