drivers/power/pmic/pmic_tps62362.c

   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 #ifdef CONFIG_DM_I2C
  14 struct udevice *tps62362_dev __attribute__((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  */
  24 int tps62362_voltage_update(unsigned char reg, unsigned char volt_sel)
  25 {
  26         if (reg > TPS62362_NUM_REGS)
  27                 return 1;
  28
  29 #ifndef CONFIG_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 #ifndef CONFIG_DM_I2C
  39 int 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
  59 int 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