1 /*
2 * Copyright (C) 2015 Samsung Electronics
3 * Przemyslaw Marczak <p.marczak@samsung.com>
4 *
5 * SPDX-License-Identifier: GPL-2.0+
6 */
7
8 #include <common.h>
9 #include <fdtdec.h>
10 #include <errno.h>
11 #include <dm.h>
12 #include <i2c.h>
13 #include <power/pmic.h>
14 #include <power/regulator.h>
15 #include <power/sandbox_pmic.h>
16
17 DECLARE_GLOBAL_DATA_PTR;
18
19 static const struct pmic_child_info pmic_children_info[] = {
20 { .prefix = SANDBOX_OF_LDO_PREFIX, .driver = SANDBOX_LDO_DRIVER },
21 { .prefix = SANDBOX_OF_BUCK_PREFIX, .driver = SANDBOX_BUCK_DRIVER },
22 { },
23 };
24
sandbox_pmic_reg_count(struct udevice * dev)25 static int sandbox_pmic_reg_count(struct udevice *dev)
26 {
27 return SANDBOX_PMIC_REG_COUNT;
28 }
29
sandbox_pmic_write(struct udevice * dev,uint reg,const uint8_t * buff,int len)30 static int sandbox_pmic_write(struct udevice *dev, uint reg,
31 const uint8_t *buff, int len)
32 {
33 if (dm_i2c_write(dev, reg, buff, len)) {
34 pr_err("write error to device: %p register: %#x!", dev, reg);
35 return -EIO;
36 }
37
38 return 0;
39 }
40
sandbox_pmic_read(struct udevice * dev,uint reg,uint8_t * buff,int len)41 static int sandbox_pmic_read(struct udevice *dev, uint reg,
42 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
sandbox_pmic_bind(struct udevice * dev)52 static int sandbox_pmic_bind(struct udevice *dev)
53 {
54 if (!pmic_bind_children(dev, dev_ofnode(dev), pmic_children_info))
55 pr_err("%s:%d PMIC: %s - no child found!", __func__, __LINE__,
56 dev->name);
57
58 /* Always return success for this device - allows for PMIC I/O */
59 return 0;
60 }
61
62 static struct dm_pmic_ops sandbox_pmic_ops = {
63 .reg_count = sandbox_pmic_reg_count,
64 .read = sandbox_pmic_read,
65 .write = sandbox_pmic_write,
66 };
67
68 static const struct udevice_id sandbox_pmic_ids[] = {
69 { .compatible = "sandbox,pmic" },
70 { }
71 };
72
73 U_BOOT_DRIVER(sandbox_pmic) = {
74 .name = "sandbox_pmic",
75 .id = UCLASS_PMIC,
76 .of_match = sandbox_pmic_ids,
77 .bind = sandbox_pmic_bind,
78 .ops = &sandbox_pmic_ops,
79 };
80