drivers/power/power_fsl.c

   1 /*
   2  *  Copyright (C) 2011 Samsung Electronics
   3  *  Lukasz Majewski <l.majewski@samsung.com>
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  */
  23
  24 #include <common.h>
  25 #include <spi.h>
  26 #include <power/pmic.h>
  27 #include <fsl_pmic.h>
  28 #include <errno.h>
  29
  30 #if defined(CONFIG_PMIC_FSL_MC13892)
  31 #define FSL_PMIC_I2C_LENGTH     3
  32 #elif defined(CONFIG_PMIC_FSL_MC34704)
  33 #define FSL_PMIC_I2C_LENGTH     1
  34 #endif
  35
  36 #if defined(CONFIG_POWER_SPI)
  37 static u32 pmic_spi_prepare_tx(u32 reg, u32 *val, u32 write)
  38 {
  39         return (write << 31) | (reg << 25) | (*val & 0x00FFFFFF);
  40 }
  41 #endif
  42
  43 int pmic_init(unsigned char bus)
  44 {
  45         static const char name[] = "FSL_PMIC";
  46         struct pmic *p = pmic_alloc();
  47
  48         if (!p) {
  49                 printf("%s: POWER allocation error!\n", __func__);
  50                 return -ENOMEM;
  51         }
  52
  53         p->name = name;
  54         p->number_of_regs = PMIC_NUM_OF_REGS;
  55
  56 #if defined(CONFIG_POWER_SPI)
  57         p->interface = PMIC_SPI;
  58         p->bus = CONFIG_FSL_PMIC_BUS;
  59         p->hw.spi.cs = CONFIG_FSL_PMIC_CS;
  60         p->hw.spi.clk = CONFIG_FSL_PMIC_CLK;
  61         p->hw.spi.mode = CONFIG_FSL_PMIC_MODE;
  62         p->hw.spi.bitlen = CONFIG_FSL_PMIC_BITLEN;
  63         p->hw.spi.flags = SPI_XFER_BEGIN | SPI_XFER_END;
  64         p->hw.spi.prepare_tx = pmic_spi_prepare_tx;
  65 #elif defined(CONFIG_POWER_I2C)
  66         p->interface = PMIC_I2C;
  67         p->hw.i2c.addr = CONFIG_SYS_FSL_PMIC_I2C_ADDR;
  68         p->hw.i2c.tx_num = FSL_PMIC_I2C_LENGTH;
  69         p->bus = I2C_PMIC;
  70 #else
  71 #error "You must select CONFIG_POWER_SPI or CONFIG_PMIC_I2C"
  72 #endif
  73
  74         return 0;
  75 }