]> git.sur5r.net Git - u-boot/blob - drivers/power/pmic/rk808.c
dm: core: Replace of_offset with accessor
[u-boot] / drivers / power / pmic / rk808.c
1 /*
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
16 DECLARE_GLOBAL_DATA_PTR;
17
18 static 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
25 static int rk808_reg_count(struct udevice *dev)
26 {
27         return RK808_NUM_OF_REGS;
28 }
29
30 static int rk808_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 rk808_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 rk808_bind(struct udevice *dev)
59 {
60         const void *blob = gd->fdt_blob;
61         int regulators_node;
62         int children;
63
64         regulators_node = fdt_subnode_offset(blob, dev_of_offset(dev),
65                                              "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
83 static struct dm_pmic_ops rk808_ops = {
84         .reg_count = rk808_reg_count,
85         .read = rk808_read,
86         .write = rk808_write,
87 };
88
89 static const struct udevice_id rk808_ids[] = {
90         { .compatible = "rockchip,rk808" },
91         { }
92 };
93
94 U_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 };