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/*
* arch/arm/mach-ux500/devices-cg2900-u5500.c
*
* Copyright (C) ST-Ericsson SA 2010
* Authors:
* Par-Gunnar Hjalmdahl (par-gunnar.p.hjalmdahl@stericsson.com) for ST-Ericsson.
* Henrik Possung (henrik.possung@stericsson.com) for ST-Ericsson.
* Josef Kindberg (josef.kindberg@stericsson.com) for ST-Ericsson.
* Dariusz Szymszak (dariusz.xd.szymczak@stericsson.com) for ST-Ericsson.
* Kjell Andersson (kjell.k.andersson@stericsson.com) for ST-Ericsson.
* License terms: GNU General Public License (GPL), version 2
*
* Board specific device support for the Linux Bluetooth HCI H:4 Driver
* for ST-Ericsson connectivity controller.
*/
#include <linux/delay.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/clk.h>
#include <linux/types.h>
#include <linux/mfd/abx500/ab5500.h>
#include <mach/prcmu-db5500.h>
#include "devices-cg2900.h"
/* prcmu resout1 pin is used for CG2900 reset*/
void dcg2900_enable_chip(struct cg2900_chip_dev *dev)
{
struct dcg2900_info *info = dev->b_data;
clk_enable(info->lpoclk);
/*
* Due to a bug in CG2900 we cannot just set GPIO high to enable
* the chip. We must wait more than 100 msecs before enbling the
* chip.
* - Set PDB to low.
* - Wait for 100 msecs
* - Set PDB to high.
*/
prcmu_resetout(1, 0);
schedule_timeout_uninterruptible(msecs_to_jiffies(
CHIP_ENABLE_PDB_LOW_TIMEOUT));
prcmu_resetout(1, 1);
}
void dcg2900_disable_chip(struct cg2900_chip_dev *dev)
{
struct dcg2900_info *info = dev->b_data;
prcmu_resetout(1, 0);
clk_disable(info->lpoclk);
}
int dcg2900_setup(struct cg2900_chip_dev *dev,
struct dcg2900_info *info)
{
info->lpoclk = clk_get(dev->dev, "lpoclk");
if (IS_ERR(info->lpoclk))
return PTR_ERR(info->lpoclk);
return 0;
}
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