LXR uboot/drivers/power/power

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * Copyright (C) 2011 Samsung Electronics
   4 * Lukasz Majewski <l.majewski@samsung.com>
   5 *
   6 * (C) Copyright 2010
   7 * Stefano Babic, DENX Software Engineering, sbabic@denx.de
   8 *
   9 * (C) Copyright 2008-2009 Freescale Semiconductor, Inc.
  10 * (C) Copyright 2019 NXP
  11 */
  12
  13#include <common.h>
  14#include <log.h>
  15#include <linux/types.h>
  16#include <power/pmic.h>
  17#include <i2c.h>
  18#include <linux/compiler.h>
  19
  20int pmic_reg_write(struct pmic *p, u32 reg, u32 val)
  21{
  22        unsigned char buf[4] = { 0 };
  23
  24        if (check_reg(p, reg))
  25                return -EINVAL;
  26#if CONFIG_IS_ENABLED(DM_I2C)
  27        struct udevice *dev;
  28        int ret;
  29
  30        ret = i2c_get_chip_for_busnum(p->bus, pmic_i2c_addr,
  31                                      1, &dev);
  32        if (ret) {
  33                printf("%s: Cannot find udev for a bus %d\n", __func__,
  34                       p->bus);
  35                return -ENXIO;
  36        }
  37#else /* Non DM I2C support - will be removed */
  38        I2C_SET_BUS(p->bus);
  39#endif
  40
  41        switch (pmic_i2c_tx_num) {
  42        case 3:
  43                if (p->sensor_byte_order == PMIC_SENSOR_BYTE_ORDER_BIG) {
  44                        buf[2] = (cpu_to_le32(val) >> 16) & 0xff;
  45                        buf[1] = (cpu_to_le32(val) >> 8) & 0xff;
  46                        buf[0] = cpu_to_le32(val) & 0xff;
  47                } else {
  48                        buf[0] = (cpu_to_le32(val) >> 16) & 0xff;
  49                        buf[1] = (cpu_to_le32(val) >> 8) & 0xff;
  50                        buf[2] = cpu_to_le32(val) & 0xff;
  51                }
  52                break;
  53        case 2:
  54                if (p->sensor_byte_order == PMIC_SENSOR_BYTE_ORDER_BIG) {
  55                        buf[1] = (cpu_to_le32(val) >> 8) & 0xff;
  56                        buf[0] = cpu_to_le32(val) & 0xff;
  57                } else {
  58                        buf[0] = (cpu_to_le32(val) >> 8) & 0xff;
  59                        buf[1] = cpu_to_le32(val) & 0xff;
  60                }
  61                break;
  62        case 1:
  63                buf[0] = cpu_to_le32(val) & 0xff;
  64                break;
  65        default:
  66                printf("%s: invalid tx_num: %d", __func__, pmic_i2c_tx_num);
  67                return -EINVAL;
  68        }
  69
  70#if CONFIG_IS_ENABLED(DM_I2C)
  71        return dm_i2c_write(dev, reg, buf, pmic_i2c_tx_num);
  72#else
  73        return i2c_write(pmic_i2c_addr, reg, 1, buf, pmic_i2c_tx_num);
  74#endif
  75}
  76
  77int pmic_reg_read(struct pmic *p, u32 reg, u32 *val)
  78{
  79        unsigned char buf[4] = { 0 };
  80        u32 ret_val = 0;
  81        int ret;
  82
  83        if (check_reg(p, reg))
  84                return -EINVAL;
  85
  86#if CONFIG_IS_ENABLED(DM_I2C)
  87        struct udevice *dev;
  88
  89        ret = i2c_get_chip_for_busnum(p->bus, pmic_i2c_addr,
  90                                      1, &dev);
  91        if (ret) {
  92                printf("%s: Cannot find udev for a bus %d\n", __func__,
  93                       p->bus);
  94                return -ENXIO;
  95        }
  96        ret = dm_i2c_read(dev, reg, buf, pmic_i2c_tx_num);
  97#else /* Non DM I2C support - will be removed */
  98        I2C_SET_BUS(p->bus);
  99        ret = i2c_read(pmic_i2c_addr, reg, 1, buf, pmic_i2c_tx_num);
 100#endif
 101        if (ret)
 102                return ret;
 103
 104        switch (pmic_i2c_tx_num) {
 105        case 3:
 106                if (p->sensor_byte_order == PMIC_SENSOR_BYTE_ORDER_BIG)
 107                        ret_val = le32_to_cpu(buf[2] << 16
 108                                              | buf[1] << 8 | buf[0]);
 109                else
 110                        ret_val = le32_to_cpu(buf[0] << 16 |
 111                                              buf[1] << 8 | buf[2]);
 112                break;
 113        case 2:
 114                if (p->sensor_byte_order == PMIC_SENSOR_BYTE_ORDER_BIG)
 115                        ret_val = le32_to_cpu(buf[1] << 8 | buf[0]);
 116                else
 117                        ret_val = le32_to_cpu(buf[0] << 8 | buf[1]);
 118                break;
 119        case 1:
 120                ret_val = le32_to_cpu(buf[0]);
 121                break;
 122        default:
 123                printf("%s: invalid tx_num: %d", __func__, pmic_i2c_tx_num);
 124                return -EINVAL;
 125        }
 126        memcpy(val, &ret_val, sizeof(ret_val));
 127
 128        return 0;
 129}
 130
 131int pmic_probe(struct pmic *p)
 132{
 133        debug("Bus: %d PMIC:%s probed!\n", p->bus, p->name);
 134#if CONFIG_IS_ENABLED(DM_I2C)
 135        struct udevice *dev;
 136        int ret;
 137
 138        ret = i2c_get_chip_for_busnum(p->bus, pmic_i2c_addr,
 139                                      1, &dev);
 140        if (ret) {
 141                printf("%s: Cannot find udev for a bus %d\n", __func__,
 142                       p->bus);
 143                return -ENXIO;
 144        }
 145#else /* Non DM I2C support - will be removed */
 146        i2c_set_bus_num(p->bus);
 147        if (i2c_probe(pmic_i2c_addr)) {
 148                printf("Can't find PMIC:%s\n", p->name);
 149                return -ENODEV;
 150        }
 151#endif
 152
 153        return 0;
 154}
 155