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be0524d38f
This is i.MX BSP 5.0.0 release ported to 2.6.31 Signed-off-by: Rob Herring <r.herring@freescale.com> Signed-off-by: Alan Tull <r80115@freescale.com> Signed-off-by: Xinyu Chen <xinyu.chen@freescale.com>
101 lines
2.3 KiB
C
101 lines
2.3 KiB
C
/*
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* Copyright 2004-2009 Freescale Semiconductor, Inc. All Rights Reserved.
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*/
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/*
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* The code contained herein is licensed under the GNU General Public
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* License. You may obtain a copy of the GNU General Public License
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* Version 2 or later at the following locations:
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*
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* http://www.opensource.org/licenses/gpl-license.html
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* http://www.gnu.org/copyleft/gpl.html
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*/
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/*!
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* @file pmic_external.c
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* @brief This file contains all external functions of PMIC drivers.
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*
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* @ingroup PMIC_CORE
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*/
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/*
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* Includes
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*/
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#include <linux/module.h>
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#include <linux/interrupt.h>
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#include <linux/wait.h>
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#include <linux/init.h>
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#include <linux/errno.h>
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#include <linux/pmic_external.h>
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#include <linux/pmic_status.h>
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/*
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* External Functions
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*/
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extern int pmic_read(int reg_num, unsigned int *reg_val);
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extern int pmic_write(int reg_num, const unsigned int reg_val);
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/*!
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* This function is called by PMIC clients to read a register on PMIC.
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*
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* @param reg number of register
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* @param reg_value return value of register
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* @param reg_mask Bitmap mask indicating which bits to modify
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*
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* @return This function returns PMIC_SUCCESS if successful.
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*/
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PMIC_STATUS pmic_read_reg(int reg, unsigned int *reg_value,
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unsigned int reg_mask)
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{
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int ret = 0;
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unsigned int temp = 0;
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ret = pmic_read(reg, &temp);
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if (ret != PMIC_SUCCESS) {
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return PMIC_ERROR;
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}
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*reg_value = (temp & reg_mask);
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pr_debug("Read REG[ %d ] = 0x%x\n", reg, *reg_value);
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return ret;
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}
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/*!
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* This function is called by PMIC clients to write a register on PMIC.
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*
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* @param reg number of register
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* @param reg_value New value of register
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* @param reg_mask Bitmap mask indicating which bits to modify
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*
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* @return This function returns PMIC_SUCCESS if successful.
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*/
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PMIC_STATUS pmic_write_reg(int reg, unsigned int reg_value,
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unsigned int reg_mask)
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{
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int ret = 0;
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unsigned int temp = 0;
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ret = pmic_read(reg, &temp);
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if (ret != PMIC_SUCCESS) {
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return PMIC_ERROR;
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}
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temp = (temp & (~reg_mask)) | reg_value;
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#ifdef CONFIG_MXC_PMIC_MC13783
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if (reg == REG_POWER_MISCELLANEOUS)
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temp &= 0xFFFE7FFF;
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#endif
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ret = pmic_write(reg, temp);
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if (ret != PMIC_SUCCESS) {
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return PMIC_ERROR;
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}
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pr_debug("Write REG[ %d ] = 0x%x\n", reg, reg_value);
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return ret;
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}
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EXPORT_SYMBOL(pmic_read_reg);
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EXPORT_SYMBOL(pmic_write_reg);
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