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/* linux/arch/arm/mach-exynos/setup-gsc.c
*
* Copyright (c) 2011 Samsung Electronics Co., Ltd.
* http://www.samsung.com
*
* Base Exynos5 G-Scaler clock configuration
*
* 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/kernel.h>
#include <linux/types.h>
#include <linux/clk.h>
#include <linux/err.h>
#include <plat/clock.h>
#include <mach/regs-clock.h>
#include <mach/map.h>
#include <media/exynos_gscaler.h>
int __init exynos5_gsc_set_parent_clock(const char *child, const char *parent)
{
struct clk *clk_parent;
struct clk *clk_child;
clk_child = clk_get(NULL, child);
if (IS_ERR(clk_child)) {
pr_err("failed to get %s clock.\n", child);
return PTR_ERR(clk_child);
}
clk_parent = clk_get(NULL, parent);
if (IS_ERR(clk_parent)) {
clk_put(clk_child);
pr_err("failed to get %s clock.\n", parent);
return PTR_ERR(clk_parent);
}
if (clk_set_parent(clk_child, clk_parent)) {
pr_err("Unable to set parent %s of clock %s.\n",
clk_parent->name, clk_child->name);
clk_put(clk_child);
clk_put(clk_parent);
return PTR_ERR(clk_child);
}
clk_put(clk_child);
clk_put(clk_parent);
return 0;
}
int __init exynos5_gsc_set_clock_rate(const char *clk, unsigned long clk_rate)
{
struct clk *gsc_clk;
gsc_clk = clk_get(NULL, clk);
if (IS_ERR(gsc_clk)) {
pr_err("failed to get %s clock.\n", clk);
return PTR_ERR(gsc_clk);
}
if (!clk_rate)
clk_rate = 310000000UL;
if (clk_set_rate(gsc_clk, clk_rate)) {
pr_err("%s rate change failed: %lu\n", gsc_clk->name, clk_rate);
clk_put(gsc_clk);
return PTR_ERR(gsc_clk);
}
clk_put(gsc_clk);
return 0;
}
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