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/*
* Copyright 2004-2010 Freescale Semiconductor, Inc. All Rights Reserved.
*/
/*
* The code contained herein is licensed under the GNU General Public
* License. You may obtain a copy of the GNU General Public License
* Version 2 or later at the following locations:
*
* http://www.opensource.org/licenses/gpl-license.html
* http://www.gnu.org/copyleft/gpl.html
*/
/*!
* @file pmic_external.c
* @brief This file contains all external functions of PMIC drivers.
*
* @ingroup PMIC_CORE
*/
/*
* Includes
*/
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/wait.h>
#include <linux/init.h>
#include <linux/errno.h>
#include <linux/pmic_external.h>
#include <linux/pmic_status.h>
/*
* External Functions
*/
extern int pmic_read(int reg_num, unsigned int *reg_val);
extern int pmic_write(int reg_num, const unsigned int reg_val);
/*!
* This function is called by PMIC clients to read a register on PMIC.
*
* @param reg number of register
* @param reg_value return value of register
* @param reg_mask Bitmap mask indicating which bits to modify
*
* @return This function returns PMIC_SUCCESS if successful.
*/
PMIC_STATUS pmic_read_reg(int reg, unsigned int *reg_value,
unsigned int reg_mask)
{
int ret = 0;
unsigned int temp = 0;
ret = pmic_read(reg, &temp);
if (ret != PMIC_SUCCESS) {
return PMIC_ERROR;
}
*reg_value = (temp & reg_mask);
pr_debug("Read REG[ %d ] = 0x%x\n", reg, *reg_value);
return ret;
}
/*!
* This function is called by PMIC clients to write a register on PMIC.
*
* @param reg number of register
* @param reg_value New value of register
* @param reg_mask Bitmap mask indicating which bits to modify
*
* @return This function returns PMIC_SUCCESS if successful.
*/
PMIC_STATUS pmic_write_reg(int reg, unsigned int reg_value,
unsigned int reg_mask)
{
int ret = 0;
unsigned int temp = 0;
ret = pmic_read(reg, &temp);
if (ret != PMIC_SUCCESS) {
return PMIC_ERROR;
}
temp = (temp & (~reg_mask)) | reg_value;
#ifdef CONFIG_MXC_PMIC_MC13783
if (reg == REG_POWER_MISCELLANEOUS)
temp &= 0xFFFE7FFF;
#endif
ret = pmic_write(reg, temp);
if (ret != PMIC_SUCCESS) {
return PMIC_ERROR;
}
pr_debug("Write REG[ %d ] = 0x%x\n", reg, reg_value);
return ret;
}
EXPORT_SYMBOL(pmic_read_reg);
EXPORT_SYMBOL(pmic_write_reg);
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