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