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/*
* OMAP4 system control module driver file
*
* Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
* Author: J Keerthy <j-keerthy@ti.com>
* Author: Moiz Sonasath <m-sonasath@ti.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
*/
#include <linux/interrupt.h>
#include <linux/clk.h>
#include <linux/io.h>
#include <linux/slab.h>
#include <linux/gpio.h>
#include <linux/platform_device.h>
#include <plat/omap_device.h>
#include <linux/kernel.h>
#include <linux/jiffies.h>
#include <linux/err.h>
#include <linux/types.h>
#include <linux/mutex.h>
#include <linux/delay.h>
#include <linux/reboot.h>
#include <plat/scm.h>
#include <linux/mfd/omap4_scm.h>
u32 omap4plus_scm_readl(struct scm *scm_ptr, u32 reg)
{
return __raw_readl(scm_ptr->base + reg);
}
EXPORT_SYMBOL_GPL(omap4plus_scm_readl);
void omap4plus_scm_writel(struct scm *scm_ptr, u32 val, u32 reg)
{
__raw_writel(val, scm_ptr->base + reg);
}
EXPORT_SYMBOL_GPL(omap4plus_scm_writel);
static int __devinit omap4plus_scm_probe(struct platform_device *pdev)
{
struct omap4plus_scm_pdata *pdata = pdev->dev.platform_data;
struct scm *scm_ptr;
struct resource *mem;
int ret = 0;
if (!pdata) {
dev_err(&pdev->dev, "platform data missing\n");
return -EINVAL;
}
scm_ptr = kzalloc(sizeof(*scm_ptr), GFP_KERNEL);
if (!scm_ptr) {
dev_err(&pdev->dev, "Memory allocation failed\n");
return -ENOMEM;
}
scm_ptr->cnt = pdata->cnt;
mutex_init(&scm_ptr->scm_mutex);
mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!mem) {
dev_err(&pdev->dev, "no mem resource\n");
ret = -ENOMEM;
goto get_res_err;
}
scm_ptr->irq = platform_get_irq_byname(pdev, "thermal_alert");
if (scm_ptr->irq < 0) {
dev_err(&pdev->dev, "get_irq_byname failed\n");
ret = scm_ptr->irq;
goto get_res_err;
}
scm_ptr->base = ioremap(mem->start, resource_size(mem));
if (!scm_ptr->base) {
dev_err(&pdev->dev, "ioremap failed\n");
ret = -ENOMEM;
goto get_res_err;
}
scm_ptr->rev = pdata->rev;
scm_ptr->accurate = pdata->accurate;
scm_ptr->dev = &pdev->dev;
dev_set_drvdata(&pdev->dev, scm_ptr);
return ret;
get_res_err:
mutex_destroy(&scm_ptr->scm_mutex);
kfree(scm_ptr);
return ret;
}
static int __devexit omap4plus_scm_remove(struct platform_device *pdev)
{
struct scm *scm_ptr = platform_get_drvdata(pdev);
free_irq(scm_ptr->irq, scm_ptr);
clk_put(scm_ptr->fclock);
clk_put(scm_ptr->div_clk);
iounmap(scm_ptr->base);
dev_set_drvdata(&pdev->dev, NULL);
mutex_destroy(&scm_ptr->scm_mutex);
kfree(scm_ptr);
return 0;
}
static struct platform_driver omap4plus_scm_driver = {
.probe = omap4plus_scm_probe,
.remove = omap4plus_scm_remove,
.driver = {
.name = "omap4plus_scm",
},
};
static int __init omap4plus_scm_init(void)
{
return platform_driver_register(&omap4plus_scm_driver);
}
module_init(omap4plus_scm_init);
static void __exit omap4plus_scm_exit(void)
{
platform_driver_unregister(&omap4plus_scm_driver);
}
module_exit(omap4plus_scm_exit);
MODULE_DESCRIPTION("OMAP4 plus system control module Driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:" DRIVER_NAME);
MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>");
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