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common: Drop asm/global_data.h from common header
[u-boot.git] / drivers / power / pmic / bd71837.c
1 // SPDX-License-Identifier:      GPL-2.0+
2 /*
3  * Copyright 2018 NXP
4  */
5
6 #include <common.h>
7 #include <errno.h>
8 #include <dm.h>
9 #include <i2c.h>
10 #include <log.h>
11 #include <asm/global_data.h>
12 #include <power/pmic.h>
13 #include <power/regulator.h>
14 #include <power/bd71837.h>
15
16 DECLARE_GLOBAL_DATA_PTR;
17
18 static const struct pmic_child_info pmic_children_info[] = {
19         /* buck */
20         { .prefix = "b", .driver = BD718XX_REGULATOR_DRIVER},
21         /* ldo */
22         { .prefix = "l", .driver = BD718XX_REGULATOR_DRIVER},
23         { },
24 };
25
26 static int bd71837_reg_count(struct udevice *dev)
27 {
28         return BD718XX_MAX_REGISTER - 1;
29 }
30
31 static int bd71837_write(struct udevice *dev, uint reg, const uint8_t *buff,
32                          int len)
33 {
34         if (dm_i2c_write(dev, reg, buff, len)) {
35                 pr_err("write error to device: %p register: %#x!", dev, reg);
36                 return -EIO;
37         }
38
39         return 0;
40 }
41
42 static int bd71837_read(struct udevice *dev, uint reg, uint8_t *buff, int len)
43 {
44         if (dm_i2c_read(dev, reg, buff, len)) {
45                 pr_err("read error from device: %p register: %#x!", dev, reg);
46                 return -EIO;
47         }
48
49         return 0;
50 }
51
52 static int bd71837_bind(struct udevice *dev)
53 {
54         int children;
55         ofnode regulators_node;
56
57         regulators_node = dev_read_subnode(dev, "regulators");
58         if (!ofnode_valid(regulators_node)) {
59                 debug("%s: %s regulators subnode not found!\n", __func__,
60                       dev->name);
61                 return -ENXIO;
62         }
63
64         debug("%s: '%s' - found regulators subnode\n", __func__, dev->name);
65
66         children = pmic_bind_children(dev, regulators_node, pmic_children_info);
67         if (!children)
68                 debug("%s: %s - no child found\n", __func__, dev->name);
69
70         /* Always return success for this device */
71         return 0;
72 }
73
74 static int bd718x7_probe(struct udevice *dev)
75 {
76         int ret;
77         uint8_t mask = BD718XX_REGLOCK_PWRSEQ | BD718XX_REGLOCK_VREG;
78
79         /* Unlock the PMIC regulator control before probing the children */
80         ret = pmic_clrsetbits(dev, BD718XX_REGLOCK, mask, 0);
81         if (ret) {
82                 debug("%s: %s Failed to unlock regulator control\n", __func__,
83                       dev->name);
84                 return ret;
85         }
86         debug("%s: '%s' - BD718x7 PMIC registers unlocked\n", __func__,
87               dev->name);
88
89         return 0;
90 }
91
92 static struct dm_pmic_ops bd71837_ops = {
93         .reg_count = bd71837_reg_count,
94         .read = bd71837_read,
95         .write = bd71837_write,
96 };
97
98 static const struct udevice_id bd71837_ids[] = {
99         { .compatible = "rohm,bd71837", .data = ROHM_CHIP_TYPE_BD71837, },
100         { .compatible = "rohm,bd71847", .data = ROHM_CHIP_TYPE_BD71847, },
101         { }
102 };
103
104 U_BOOT_DRIVER(pmic_bd71837) = {
105         .name = "bd71837 pmic",
106         .id = UCLASS_PMIC,
107         .of_match = bd71837_ids,
108         .bind = bd71837_bind,
109         .probe = bd718x7_probe,
110         .ops = &bd71837_ops,
111 };
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