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/*
* 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.
*
* Copyright (C) 2012 ARM Limited
*/
#include <linux/amba/sp810.h>
#include <linux/clkdev.h>
#include <linux/clk-provider.h>
#include <linux/err.h>
#include <linux/of.h>
#include <linux/vexpress.h>
static DEFINE_SPINLOCK(vexpress_sp810_lock);
static const char * const vexpress_clk_24mhz_periphs[] __initconst = {
"mb:uart0", "mb:uart1", "mb:uart2", "mb:uart3",
"mb:mmci", "mb:kmi0", "mb:kmi1"
};
void __init vexpress_clk_init(void __iomem *sp810_base)
{
struct clk *clk;
const char *sp810_parent_names[] = {
"v2m:refclk32khz", /* REFCLK */
"v2m:refclk1mhz" /* TIMCLK */
};
struct clk *sp810_parent;
int i;
clk = clk_register_fixed_rate(NULL, "dummy_apb_pclk", NULL,
CLK_IS_ROOT, 0);
WARN_ON(clk_register_clkdev(clk, "apb_pclk", NULL));
clk = clk_register_fixed_rate(NULL, "v2m:clk_24mhz", NULL,
CLK_IS_ROOT, 24000000);
for (i = 0; i < ARRAY_SIZE(vexpress_clk_24mhz_periphs); i++)
WARN_ON(clk_register_clkdev(clk, NULL,
vexpress_clk_24mhz_periphs[i]));
clk = clk_register_fixed_rate(NULL, "v2m:refclk32khz", NULL,
CLK_IS_ROOT, 32768);
WARN_ON(clk_register_clkdev(clk, NULL, "v2m:wdt"));
sp810_parent = clk_register_fixed_rate(NULL, "v2m:refclk1mhz", NULL,
CLK_IS_ROOT, 1000000);
clk = clk_register_mux(NULL, "timerclken0",
sp810_parent_names, 2, 0, sp810_base + SCCTRL,
SCCTRL_TIMERENnSEL_SHIFT(0), 1,
0, &vexpress_sp810_lock);
WARN_ON(clk_set_parent(clk, sp810_parent));
WARN_ON(clk_register_clkdev(clk, "v2m-timer0", "sp804"));
clk = clk_register_mux(NULL, "timerclken1",
sp810_parent_names, 2, 0, sp810_base + SCCTRL,
SCCTRL_TIMERENnSEL_SHIFT(1), 1,
0, &vexpress_sp810_lock);
WARN_ON(clk_set_parent(clk, sp810_parent));
WARN_ON(clk_register_clkdev(clk, "v2m-timer1", "sp804"));
}
#if defined(CONFIG_OF)
void __init vexpress_clk_of_init(void)
{
of_clk_init(NULL);
}
#endif
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