1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (C) 2011 Samsung Electronics
4 * Lukasz Majewski <l.majewski@samsung.com>
7 * Stefano Babic, DENX Software Engineering, sbabic@denx.de
9 * (C) Copyright 2008-2009 Freescale Semiconductor, Inc.
13 #include <linux/types.h>
14 #include <power/pmic.h>
16 #include <linux/compiler.h>
18 int pmic_reg_write(struct pmic *p, u32 reg, u32 val)
20 unsigned char buf[4] = { 0 };
22 if (check_reg(p, reg))
27 switch (pmic_i2c_tx_num) {
29 if (p->sensor_byte_order == PMIC_SENSOR_BYTE_ORDER_BIG) {
30 buf[2] = (cpu_to_le32(val) >> 16) & 0xff;
31 buf[1] = (cpu_to_le32(val) >> 8) & 0xff;
32 buf[0] = cpu_to_le32(val) & 0xff;
34 buf[0] = (cpu_to_le32(val) >> 16) & 0xff;
35 buf[1] = (cpu_to_le32(val) >> 8) & 0xff;
36 buf[2] = cpu_to_le32(val) & 0xff;
40 if (p->sensor_byte_order == PMIC_SENSOR_BYTE_ORDER_BIG) {
41 buf[1] = (cpu_to_le32(val) >> 8) & 0xff;
42 buf[0] = cpu_to_le32(val) & 0xff;
44 buf[0] = (cpu_to_le32(val) >> 8) & 0xff;
45 buf[1] = cpu_to_le32(val) & 0xff;
49 buf[0] = cpu_to_le32(val) & 0xff;
52 printf("%s: invalid tx_num: %d", __func__, pmic_i2c_tx_num);
56 return i2c_write(pmic_i2c_addr, reg, 1, buf, pmic_i2c_tx_num);
59 int pmic_reg_read(struct pmic *p, u32 reg, u32 *val)
61 unsigned char buf[4] = { 0 };
65 if (check_reg(p, reg))
70 ret = i2c_read(pmic_i2c_addr, reg, 1, buf, pmic_i2c_tx_num);
74 switch (pmic_i2c_tx_num) {
76 if (p->sensor_byte_order == PMIC_SENSOR_BYTE_ORDER_BIG)
77 ret_val = le32_to_cpu(buf[2] << 16
78 | buf[1] << 8 | buf[0]);
80 ret_val = le32_to_cpu(buf[0] << 16 |
81 buf[1] << 8 | buf[2]);
84 if (p->sensor_byte_order == PMIC_SENSOR_BYTE_ORDER_BIG)
85 ret_val = le32_to_cpu(buf[1] << 8 | buf[0]);
87 ret_val = le32_to_cpu(buf[0] << 8 | buf[1]);
90 ret_val = le32_to_cpu(buf[0]);
93 printf("%s: invalid tx_num: %d", __func__, pmic_i2c_tx_num);
96 memcpy(val, &ret_val, sizeof(ret_val));
101 int pmic_probe(struct pmic *p)
103 i2c_set_bus_num(p->bus);
104 debug("Bus: %d PMIC:%s probed!\n", p->bus, p->name);
105 if (i2c_probe(pmic_i2c_addr)) {
106 printf("Can't find PMIC:%s\n", p->name);