drivers/power/power_fsl.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  *  Copyright (C) 2011 Samsung Electronics
   4  *  Lukasz Majewski <l.majewski@samsung.com>
   5  */
   6
   7 #include <common.h>
   8 #include <spi.h>
   9 #include <power/pmic.h>
  10 #include <fsl_pmic.h>
  11 #include <errno.h>
  12
  13 #if defined(CONFIG_POWER_FSL_MC13892)
  14 #define FSL_PMIC_I2C_LENGTH     3
  15 #elif defined(CONFIG_POWER_FSL_MC34704)
  16 #define FSL_PMIC_I2C_LENGTH     1
  17 #endif
  18
  19 #if defined(CONFIG_POWER_SPI)
  20 static u32 pmic_spi_prepare_tx(u32 reg, u32 *val, u32 write)
  21 {
  22         return (write << 31) | (reg << 25) | (*val & 0x00FFFFFF);
  23 }
  24 #endif
  25
  26 int pmic_init(unsigned char bus)
  27 {
  28         static const char name[] = "FSL_PMIC";
  29         struct pmic *p = pmic_alloc();
  30
  31         if (!p) {
  32                 printf("%s: POWER allocation error!\n", __func__);
  33                 return -ENOMEM;
  34         }
  35
  36         p->name = name;
  37         p->number_of_regs = PMIC_NUM_OF_REGS;
  38         p->bus = bus;
  39
  40 #if defined(CONFIG_POWER_SPI)
  41         p->interface = PMIC_SPI;
  42         p->hw.spi.cs = CONFIG_FSL_PMIC_CS;
  43         p->hw.spi.clk = CONFIG_FSL_PMIC_CLK;
  44         p->hw.spi.mode = CONFIG_FSL_PMIC_MODE;
  45         p->hw.spi.bitlen = CONFIG_FSL_PMIC_BITLEN;
  46         p->hw.spi.flags = SPI_XFER_BEGIN | SPI_XFER_END;
  47         p->hw.spi.prepare_tx = pmic_spi_prepare_tx;
  48 #elif defined(CONFIG_POWER_I2C)
  49         p->interface = PMIC_I2C;
  50         p->hw.i2c.addr = CONFIG_SYS_FSL_PMIC_I2C_ADDR;
  51         p->hw.i2c.tx_num = FSL_PMIC_I2C_LENGTH;
  52 #else
  53 #error "You must select CONFIG_POWER_SPI or CONFIG_POWER_I2C"
  54 #endif
  55
  56         return 0;
  57 }