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/*
* r8a73a4 clock framework support
*
* Copyright (C) 2013 Renesas Solutions Corp.
* Copyright (C) 2013 Magnus Damm
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* 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/init.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/sh_clk.h>
#include <linux/clkdev.h>
#include <mach/common.h>
#define CPG_BASE 0xe6150000
#define CPG_LEN 0x270
#define MPCKCR 0xe6150080
static struct clk_mapping cpg_mapping = {
.phys = CPG_BASE,
.len = CPG_LEN,
};
static struct clk extalr_clk = {
.rate = 32768,
.mapping = &cpg_mapping,
};
static struct clk extal1_clk = {
.rate = 26000000,
.mapping = &cpg_mapping,
};
static struct clk extal2_clk = {
.rate = 48000000,
.mapping = &cpg_mapping,
};
static struct clk *main_clks[] = {
&extalr_clk,
&extal1_clk,
&extal2_clk,
};
enum { MSTP_NR };
static struct clk mstp_clks[MSTP_NR] = {
};
static struct clk_lookup lookups[] = {
};
void __init r8a73a4_clock_init(void)
{
void __iomem *cpg_base, *reg;
int k, ret = 0;
/* fix MPCLK to EXTAL2 for now.
* this is needed until more detailed clock topology is supported
*/
cpg_base = ioremap_nocache(CPG_BASE, CPG_LEN);
BUG_ON(!cpg_base);
reg = cpg_base + (MPCKCR - CPG_BASE);
iowrite32(ioread32(reg) | 1 << 7 | 0x0c, reg); /* set CKSEL */
iounmap(cpg_base);
for (k = 0; !ret && (k < ARRAY_SIZE(main_clks)); k++)
ret = clk_register(main_clks[k]);
if (!ret)
ret = sh_clk_mstp_register(mstp_clks, MSTP_NR);
clkdev_add_table(lookups, ARRAY_SIZE(lookups));
if (!ret)
shmobile_clk_init();
else
panic("failed to setup r8a73a4 clocks\n");
}
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