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Simon Glassa8bd2ac2016-01-21 19:43:29 -07001/*
2 * Copyright (C) 2015 Google, Inc
3 * Written by Simon Glass <sjg@chromium.org>
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/rk808_pmic.h>
14#include <power/pmic.h>
15
16DECLARE_GLOBAL_DATA_PTR;
17
18static const struct pmic_child_info pmic_children_info[] = {
19 { .prefix = "DCDC_REG", .driver = "rk808_buck"},
20 { .prefix = "LDO_REG", .driver = "rk808_ldo"},
21 { .prefix = "SWITCH_REG", .driver = "rk808_switch"},
22 { },
23};
24
25static int rk808_reg_count(struct udevice *dev)
26{
27 return RK808_NUM_OF_REGS;
28}
29
30static int rk808_write(struct udevice *dev, uint reg, const uint8_t *buff,
31 int len)
32{
Simon Glass46ad8cb2016-01-21 19:43:58 -070033 int ret;
34
35 ret = dm_i2c_write(dev, reg, buff, len);
36 if (ret) {
Simon Glassa8bd2ac2016-01-21 19:43:29 -070037 debug("write error to device: %p register: %#x!", dev, reg);
Simon Glass46ad8cb2016-01-21 19:43:58 -070038 return ret;
Simon Glassa8bd2ac2016-01-21 19:43:29 -070039 }
40
41 return 0;
42}
43
44static int rk808_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
45{
Simon Glass46ad8cb2016-01-21 19:43:58 -070046 int ret;
47
48 ret = dm_i2c_read(dev, reg, buff, len);
49 if (ret) {
Simon Glassa8bd2ac2016-01-21 19:43:29 -070050 debug("read error from device: %p register: %#x!", dev, reg);
Simon Glass46ad8cb2016-01-21 19:43:58 -070051 return ret;
Simon Glassa8bd2ac2016-01-21 19:43:29 -070052 }
53
54 return 0;
55}
56
57#if CONFIG_IS_ENABLED(PMIC_CHILDREN)
58static int rk808_bind(struct udevice *dev)
59{
60 const void *blob = gd->fdt_blob;
61 int regulators_node;
62 int children;
63
Simon Glassdd79d6e2017-01-17 16:52:55 -070064 regulators_node = fdt_subnode_offset(blob, dev_of_offset(dev),
Simon Glassa8bd2ac2016-01-21 19:43:29 -070065 "regulators");
66 if (regulators_node <= 0) {
67 debug("%s: %s regulators subnode not found!", __func__,
68 dev->name);
69 return -ENXIO;
70 }
71
72 debug("%s: '%s' - found regulators subnode\n", __func__, dev->name);
73
74 children = pmic_bind_children(dev, regulators_node, pmic_children_info);
75 if (!children)
76 debug("%s: %s - no child found\n", __func__, dev->name);
77
78 /* Always return success for this device */
79 return 0;
80}
81#endif
82
83static struct dm_pmic_ops rk808_ops = {
84 .reg_count = rk808_reg_count,
85 .read = rk808_read,
86 .write = rk808_write,
87};
88
89static const struct udevice_id rk808_ids[] = {
90 { .compatible = "rockchip,rk808" },
91 { }
92};
93
94U_BOOT_DRIVER(pmic_rk808) = {
95 .name = "rk808 pmic",
96 .id = UCLASS_PMIC,
97 .of_match = rk808_ids,
98#if CONFIG_IS_ENABLED(PMIC_CHILDREN)
99 .bind = rk808_bind,
100#endif
101 .ops = &rk808_ops,
102};