2 * Copyright (C) 2011 Samsung Electronics
3 * Lukasz Majewski <l.majewski@samsung.com>
6 * Stefano Babic, DENX Software Engineering, sbabic@denx.de
8 * (C) Copyright 2008-2009 Freescale Semiconductor, Inc.
10 * SPDX-License-Identifier: GPL-2.0+
14 #include <linux/types.h>
15 #include <power/pmic.h>
19 int pmic_reg_write(struct pmic *p, u32 reg, u32 val)
21 unsigned char buf[4] = { 0 };
23 if (check_reg(p, reg))
26 switch (pmic_i2c_tx_num) {
28 if (p->sensor_byte_order == PMIC_SENSOR_BYTE_ORDER_BIG) {
29 buf[2] = (cpu_to_le32(val) >> 16) & 0xff;
30 buf[1] = (cpu_to_le32(val) >> 8) & 0xff;
31 buf[0] = cpu_to_le32(val) & 0xff;
33 buf[0] = (cpu_to_le32(val) >> 16) & 0xff;
34 buf[1] = (cpu_to_le32(val) >> 8) & 0xff;
35 buf[2] = cpu_to_le32(val) & 0xff;
39 if (p->sensor_byte_order == PMIC_SENSOR_BYTE_ORDER_BIG) {
40 buf[1] = (cpu_to_le32(val) >> 8) & 0xff;
41 buf[0] = cpu_to_le32(val) & 0xff;
43 buf[0] = (cpu_to_le32(val) >> 8) & 0xff;
44 buf[1] = cpu_to_le32(val) & 0xff;
48 buf[0] = cpu_to_le32(val) & 0xff;
51 printf("%s: invalid tx_num: %d", __func__, pmic_i2c_tx_num);
55 if (i2c_write(pmic_i2c_addr, reg, 1, buf, pmic_i2c_tx_num))
61 int pmic_reg_read(struct pmic *p, u32 reg, u32 *val)
63 unsigned char buf[4] = { 0 };
66 if (check_reg(p, reg))
69 if (i2c_read(pmic_i2c_addr, reg, 1, buf, pmic_i2c_tx_num))
72 switch (pmic_i2c_tx_num) {
74 if (p->sensor_byte_order == PMIC_SENSOR_BYTE_ORDER_BIG)
75 ret_val = le32_to_cpu(buf[2] << 16
76 | buf[1] << 8 | buf[0]);
78 ret_val = le32_to_cpu(buf[0] << 16 |
79 buf[1] << 8 | buf[2]);
82 if (p->sensor_byte_order == PMIC_SENSOR_BYTE_ORDER_BIG)
83 ret_val = le32_to_cpu(buf[1] << 8 | buf[0]);
85 ret_val = le32_to_cpu(buf[0] << 8 | buf[1]);
88 ret_val = le32_to_cpu(buf[0]);
91 printf("%s: invalid tx_num: %d", __func__, pmic_i2c_tx_num);
94 memcpy(val, &ret_val, sizeof(ret_val));
99 int pmic_probe(struct pmic *p)
102 debug("Bus: %d PMIC:%s probed!\n", p->bus, p->name);
103 if (i2c_probe(pmic_i2c_addr)) {
104 printf("Can't find PMIC:%s\n", p->name);