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/*
* Copyright 2009 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_common.c
* @brief This is the common file for the PMIC Core/Protocol driver.
*
* @ingroup PMIC_CORE
*/
/*
* Includes
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/pmic_external.h>
#include <linux/pmic_status.h>
#include <asm/uaccess.h>
#include "pmic.h"
/*
* Global variables
*/
pmic_version_t mxc_pmic_version;
unsigned int active_events[MAX_ACTIVE_EVENTS];
struct workqueue_struct *pmic_event_wq;
void pmic_bh_handler(struct work_struct *work);
/*!
* Bottom half handler of PMIC event handling.
*/
DECLARE_WORK(pmic_ws, pmic_bh_handler);
/*!
* This function is the bottom half handler of the PMIC interrupt.
* It checks for active events and launches callback for the
* active events.
*/
void pmic_bh_handler(struct work_struct *work)
{
unsigned int loop;
unsigned int count = 0;
count = pmic_get_active_events(active_events);
pr_debug("active events number %d\n", count);
for (loop = 0; loop < count; loop++)
pmic_event_callback(active_events[loop]);
return;
}
/*!
* This function is called when pmic interrupt occurs on the processor.
* It is the interrupt handler for the pmic module.
*
* @param irq the irq number
* @param dev_id the pointer on the device
*
* @return The function returns IRQ_HANDLED when handled.
*/
irqreturn_t pmic_irq_handler(int irq, void *dev_id)
{
/* prepare a task */
queue_work(pmic_event_wq, &pmic_ws);
return IRQ_HANDLED;
}
/*!
* This function is used to determine the PMIC type and its revision.
*
* @return Returns the PMIC type and its revision.
*/
pmic_version_t pmic_get_version(void)
{
return mxc_pmic_version;
}
EXPORT_SYMBOL(pmic_get_version);
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