LXR uboot/drivers/power/pmic/pmic

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * (C) Copyright 2014 Texas Instruments Incorporated -  http://www.ti.com
   4 * Author: Felipe Balbi <balbi@ti.com>
   5 */
   6
   7#include <common.h>
   8#include <i2c.h>
   9#include <linux/errno.h>
  10#include <power/pmic.h>
  11#include <power/tps62362.h>
  12
  13#if CONFIG_IS_ENABLED(DM_I2C)
  14struct udevice *tps62362_dev __section(".data") = NULL;
  15#endif
  16
  17/**
  18 * tps62362_voltage_update() - Function to change a voltage level, as this
  19 *                             is a multi-step process.
  20 * @reg:        Register address to write to
  21 * @volt_sel:   Voltage register value to write
  22 * @return:     0 on success, 1 on failure
  23 */
  24int tps62362_voltage_update(unsigned char reg, unsigned char volt_sel)
  25{
  26        if (reg > TPS62362_NUM_REGS)
  27                return 1;
  28
  29#if !CONFIG_IS_ENABLED(DM_I2C)
  30        return i2c_write(TPS62362_I2C_ADDR, reg, 1, &volt_sel, 1);
  31#else
  32        if (!tps62362_dev)
  33                return -ENODEV;
  34        return dm_i2c_reg_write(tps62362_dev, reg, volt_sel);
  35#endif
  36}
  37
  38#if !CONFIG_IS_ENABLED(DM_I2C)
  39int power_tps62362_init(unsigned char bus)
  40{
  41        static const char name[] = "TPS62362";
  42        struct pmic *p = pmic_alloc();
  43
  44        if (!p) {
  45                printf("%s: POWER allocation error!\n", __func__);
  46                return -ENOMEM;
  47        }
  48
  49        p->name = name;
  50        p->interface = PMIC_I2C;
  51        p->number_of_regs = TPS62362_NUM_REGS;
  52        p->hw.i2c.addr = TPS62362_I2C_ADDR;
  53        p->hw.i2c.tx_num = 1;
  54        p->bus = bus;
  55
  56        return 0;
  57}
  58#else
  59int power_tps62362_init(unsigned char bus)
  60{
  61        struct udevice *dev = NULL;
  62        int rc;
  63
  64        rc = i2c_get_chip_for_busnum(bus, TPS62362_I2C_ADDR, 1, &dev);
  65        if (rc)
  66                return rc;
  67        tps62362_dev = dev;
  68        return 0;
  69}
  70#endif
  71