drivers/power/pmic/pmic_max77686.c

   1 /*
   2  *  Copyright (C) 2012 Samsung Electronics
   3  *  Rajeshwari Shinde <rajeshwari.s@samsung.com>
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #include <common.h>
   9 #include <fdtdec.h>
  10 #include <i2c.h>
  11 #include <power/pmic.h>
  12 #include <power/max77686_pmic.h>
  13 #include <errno.h>
  14
  15 DECLARE_GLOBAL_DATA_PTR;
  16
  17 int pmic_init(unsigned char bus)
  18 {
  19         static const char name[] = "MAX77686_PMIC";
  20         struct pmic *p = pmic_alloc();
  21
  22         if (!p) {
  23                 printf("%s: POWER allocation error!\n", __func__);
  24                 return -ENOMEM;
  25         }
  26
  27 #ifdef CONFIG_OF_CONTROL
  28         const void *blob = gd->fdt_blob;
  29         int node, parent;
  30
  31         node = fdtdec_next_compatible(blob, 0, COMPAT_MAXIM_MAX77686_PMIC);
  32         if (node < 0) {
  33                 debug("PMIC: No node for PMIC Chip in device tree\n");
  34                 debug("node = %d\n", node);
  35                 return -1;
  36         }
  37
  38         parent = fdt_parent_offset(blob, node);
  39         if (parent < 0) {
  40                 debug("%s: Cannot find node parent\n", __func__);
  41                 return -1;
  42         }
  43
  44         p->bus = i2c_get_bus_num_fdt(parent);
  45         if (p->bus < 0) {
  46                 debug("%s: Cannot find I2C bus\n", __func__);
  47                 return -1;
  48         }
  49         p->hw.i2c.addr = fdtdec_get_int(blob, node, "reg", 9);
  50 #else
  51         p->bus = bus;
  52         p->hw.i2c.addr = MAX77686_I2C_ADDR;
  53 #endif
  54
  55         p->name = name;
  56         p->interface = PMIC_I2C;
  57         p->number_of_regs = PMIC_NUM_OF_REGS;
  58         p->hw.i2c.tx_num = 1;
  59
  60         puts("Board PMIC init\n");
  61
  62         return 0;
  63 }