112 lines
2.5 KiB
C
112 lines
2.5 KiB
C
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// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2011 Samsung Electronics
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* Lukasz Majewski <l.majewski@samsung.com>
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*
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* (C) Copyright 2010
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* Stefano Babic, DENX Software Engineering, sbabic@denx.de
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*
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* (C) Copyright 2008-2009 Freescale Semiconductor, Inc.
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*/
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#include <common.h>
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#include <linux/types.h>
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#include <power/pmic.h>
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#include <i2c.h>
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#include <linux/compiler.h>
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int pmic_reg_write(struct pmic *p, u32 reg, u32 val)
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{
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unsigned char buf[4] = { 0 };
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if (check_reg(p, reg))
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return -EINVAL;
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I2C_SET_BUS(p->bus);
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switch (pmic_i2c_tx_num) {
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case 3:
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if (p->sensor_byte_order == PMIC_SENSOR_BYTE_ORDER_BIG) {
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buf[2] = (cpu_to_le32(val) >> 16) & 0xff;
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buf[1] = (cpu_to_le32(val) >> 8) & 0xff;
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buf[0] = cpu_to_le32(val) & 0xff;
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} else {
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buf[0] = (cpu_to_le32(val) >> 16) & 0xff;
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buf[1] = (cpu_to_le32(val) >> 8) & 0xff;
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buf[2] = cpu_to_le32(val) & 0xff;
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}
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break;
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case 2:
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if (p->sensor_byte_order == PMIC_SENSOR_BYTE_ORDER_BIG) {
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buf[1] = (cpu_to_le32(val) >> 8) & 0xff;
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buf[0] = cpu_to_le32(val) & 0xff;
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} else {
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buf[0] = (cpu_to_le32(val) >> 8) & 0xff;
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buf[1] = cpu_to_le32(val) & 0xff;
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}
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break;
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case 1:
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buf[0] = cpu_to_le32(val) & 0xff;
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break;
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default:
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printf("%s: invalid tx_num: %d", __func__, pmic_i2c_tx_num);
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return -EINVAL;
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}
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return i2c_write(pmic_i2c_addr, reg, 1, buf, pmic_i2c_tx_num);
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}
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int pmic_reg_read(struct pmic *p, u32 reg, u32 *val)
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{
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unsigned char buf[4] = { 0 };
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u32 ret_val = 0;
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int ret;
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if (check_reg(p, reg))
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return -EINVAL;
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I2C_SET_BUS(p->bus);
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ret = i2c_read(pmic_i2c_addr, reg, 1, buf, pmic_i2c_tx_num);
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if (ret)
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return ret;
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switch (pmic_i2c_tx_num) {
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case 3:
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if (p->sensor_byte_order == PMIC_SENSOR_BYTE_ORDER_BIG)
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ret_val = le32_to_cpu(buf[2] << 16
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| buf[1] << 8 | buf[0]);
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else
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ret_val = le32_to_cpu(buf[0] << 16 |
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buf[1] << 8 | buf[2]);
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break;
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case 2:
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if (p->sensor_byte_order == PMIC_SENSOR_BYTE_ORDER_BIG)
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ret_val = le32_to_cpu(buf[1] << 8 | buf[0]);
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else
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ret_val = le32_to_cpu(buf[0] << 8 | buf[1]);
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break;
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case 1:
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ret_val = le32_to_cpu(buf[0]);
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break;
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default:
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printf("%s: invalid tx_num: %d", __func__, pmic_i2c_tx_num);
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return -EINVAL;
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}
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memcpy(val, &ret_val, sizeof(ret_val));
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return 0;
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}
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int pmic_probe(struct pmic *p)
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{
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i2c_set_bus_num(p->bus);
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debug("Bus: %d PMIC:%s probed!\n", p->bus, p->name);
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if (i2c_probe(pmic_i2c_addr)) {
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printf("Can't find PMIC:%s\n", p->name);
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return -ENODEV;
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}
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return 0;
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}
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