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/* linux/arch/arm/mach-exynos/asv.c
*
* Copyright (c) 2011 Samsung Electronics Co., Ltd.
* http://www.samsung.com/
*
* EXYNOS4 - ASV(Adaptive Supply Voltage) driver
*
* 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.
*/
#include <linux/init.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/slab.h>
#include <plat/cpu.h>
#include <mach/map.h>
#include <mach/regs-iem.h>
#include <mach/asv.h>
static struct samsung_asv *exynos_asv;
unsigned int exynos_result_of_asv;
static int __init exynos4_asv_init(void)
{
int ret = -EINVAL;
exynos_asv = kzalloc(sizeof(struct samsung_asv), GFP_KERNEL);
if (!exynos_asv)
goto out1;
if (soc_is_exynos4210())
ret = exynos4210_asv_init(exynos_asv);
else if (soc_is_exynos4412() || soc_is_exynos4212()) {
ret = exynos4x12_asv_init(exynos_asv);
/*
* If return value is not zero,
* There is already value for asv group.
* So, It is not necessary to execute for getting asv group.
*/
if (ret)
return 0;
} else {
pr_info("EXYNOS: There is no type for ASV\n");
goto out2;
}
if (exynos_asv->check_vdd_arm) {
if (exynos_asv->check_vdd_arm()) {
pr_info("EXYNOS: It is wrong vdd_arm\n");
goto out2;
}
}
/* Get HPM Delay value */
if (exynos_asv->get_hpm) {
if (exynos_asv->get_hpm(exynos_asv)) {
pr_info("EXYNOS: Fail to get HPM Value\n");
goto out2;
}
} else {
pr_info("EXYNOS: Fail to get HPM Value\n");
goto out2;
}
/* Get IDS ARM Value */
if (exynos_asv->get_ids) {
if (exynos_asv->get_ids(exynos_asv)) {
pr_info("EXYNOS: Fail to get IDS Value\n");
goto out2;
}
} else {
pr_info("EXYNOS: Fail to get IDS Value\n");
goto out2;
}
if (exynos_asv->store_result) {
if (exynos_asv->store_result(exynos_asv)) {
pr_info("EXYNOS: Can not success to store result\n");
goto out2;
}
} else {
pr_info("EXYNOS: No store_result function\n");
goto out2;
}
return 0;
out2:
kfree(exynos_asv);
out1:
return -EINVAL;
}
device_initcall_sync(exynos4_asv_init);
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