summaryrefslogtreecommitdiff
path: root/drivers/power/power_i2c.c
blob: 5a0455e1195a6b0cb452600abec3f9aaf6f434b8 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright (C) 2011 Samsung Electronics
 * Lukasz Majewski <l.majewski@samsung.com>
 *
 * (C) Copyright 2010
 * Stefano Babic, DENX Software Engineering, sbabic@denx.de
 *
 * (C) Copyright 2008-2009 Freescale Semiconductor, Inc.
 * (C) Copyright 2019 NXP
 */

#include <common.h>
#include <log.h>
#include <linux/types.h>
#include <power/pmic.h>
#include <i2c.h>
#include <linux/compiler.h>

int pmic_reg_write(struct pmic *p, u32 reg, u32 val)
{
	unsigned char buf[4] = { 0 };

	if (check_reg(p, reg))
		return -EINVAL;
#if defined(CONFIG_DM_I2C)
	struct udevice *dev;
	int ret;

	ret = i2c_get_chip_for_busnum(p->bus, pmic_i2c_addr,
				      1, &dev);
	if (ret) {
		printf("%s: Cannot find udev for a bus %d\n", __func__,
		       p->bus);
		return -ENXIO;
	}
#else /* Non DM I2C support - will be removed */
	I2C_SET_BUS(p->bus);
#endif

	switch (pmic_i2c_tx_num) {
	case 3:
		if (p->sensor_byte_order == PMIC_SENSOR_BYTE_ORDER_BIG) {
			buf[2] = (cpu_to_le32(val) >> 16) & 0xff;
			buf[1] = (cpu_to_le32(val) >> 8) & 0xff;
			buf[0] = cpu_to_le32(val) & 0xff;
		} else {
			buf[0] = (cpu_to_le32(val) >> 16) & 0xff;
			buf[1] = (cpu_to_le32(val) >> 8) & 0xff;
			buf[2] = cpu_to_le32(val) & 0xff;
		}
		break;
	case 2:
		if (p->sensor_byte_order == PMIC_SENSOR_BYTE_ORDER_BIG) {
			buf[1] = (cpu_to_le32(val) >> 8) & 0xff;
			buf[0] = cpu_to_le32(val) & 0xff;
		} else {
			buf[0] = (cpu_to_le32(val) >> 8) & 0xff;
			buf[1] = cpu_to_le32(val) & 0xff;
		}
		break;
	case 1:
		buf[0] = cpu_to_le32(val) & 0xff;
		break;
	default:
		printf("%s: invalid tx_num: %d", __func__, pmic_i2c_tx_num);
		return -EINVAL;
	}

#if defined(CONFIG_DM_I2C)
	return dm_i2c_write(dev, reg, buf, pmic_i2c_tx_num);
#else
	return i2c_write(pmic_i2c_addr, reg, 1, buf, pmic_i2c_tx_num);
#endif
}

int pmic_reg_read(struct pmic *p, u32 reg, u32 *val)
{
	unsigned char buf[4] = { 0 };
	u32 ret_val = 0;
	int ret;

	if (check_reg(p, reg))
		return -EINVAL;

#if defined(CONFIG_DM_I2C)
	struct udevice *dev;

	ret = i2c_get_chip_for_busnum(p->bus, pmic_i2c_addr,
				      1, &dev);
	if (ret) {
		printf("%s: Cannot find udev for a bus %d\n", __func__,
		       p->bus);
		return -ENXIO;
	}
	ret = dm_i2c_read(dev, reg, buf, pmic_i2c_tx_num);
#else /* Non DM I2C support - will be removed */
	I2C_SET_BUS(p->bus);
	ret = i2c_read(pmic_i2c_addr, reg, 1, buf, pmic_i2c_tx_num);
#endif
	if (ret)
		return ret;

	switch (pmic_i2c_tx_num) {
	case 3:
		if (p->sensor_byte_order == PMIC_SENSOR_BYTE_ORDER_BIG)
			ret_val = le32_to_cpu(buf[2] << 16
					      | buf[1] << 8 | buf[0]);
		else
			ret_val = le32_to_cpu(buf[0] << 16 |
					      buf[1] << 8 | buf[2]);
		break;
	case 2:
		if (p->sensor_byte_order == PMIC_SENSOR_BYTE_ORDER_BIG)
			ret_val = le32_to_cpu(buf[1] << 8 | buf[0]);
		else
			ret_val = le32_to_cpu(buf[0] << 8 | buf[1]);
		break;
	case 1:
		ret_val = le32_to_cpu(buf[0]);
		break;
	default:
		printf("%s: invalid tx_num: %d", __func__, pmic_i2c_tx_num);
		return -EINVAL;
	}
	memcpy(val, &ret_val, sizeof(ret_val));

	return 0;
}

int pmic_probe(struct pmic *p)
{
	debug("Bus: %d PMIC:%s probed!\n", p->bus, p->name);
#if defined(CONFIG_DM_I2C)
	struct udevice *dev;
	int ret;

	ret = i2c_get_chip_for_busnum(p->bus, pmic_i2c_addr,
				      1, &dev);
	if (ret) {
		printf("%s: Cannot find udev for a bus %d\n", __func__,
		       p->bus);
		return -ENXIO;
	}
#else /* Non DM I2C support - will be removed */
	i2c_set_bus_num(p->bus);
	if (i2c_probe(pmic_i2c_addr)) {
		printf("Can't find PMIC:%s\n", p->name);
		return -ENODEV;
	}
#endif

	return 0;
}