mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-25 05:34:00 +08:00
35c9221acb
Add the cpu.c and dev.c and modify w90p910 platform to apply to use the common API(provided by cpu.c and dev.c) at the same time, I renamed all w90x900 to nuc900 in every c file of w90x900 platform and touchscreen's driver name. Signed-off-by: Wan ZongShun <mcuos.com@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
92 lines
1.9 KiB
C
92 lines
1.9 KiB
C
/*
|
|
* linux/arch/arm/mach-w90x900/clksel.c
|
|
*
|
|
* Copyright (c) 2008 Nuvoton technology corporation
|
|
*
|
|
* Wan ZongShun <mcuos.com@gmail.com>
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/device.h>
|
|
#include <linux/list.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/err.h>
|
|
#include <linux/string.h>
|
|
#include <linux/clk.h>
|
|
#include <linux/mutex.h>
|
|
#include <linux/io.h>
|
|
|
|
#include <mach/hardware.h>
|
|
#include <mach/regs-clock.h>
|
|
|
|
#define PLL0 0x00
|
|
#define PLL1 0x01
|
|
#define OTHER 0x02
|
|
#define EXT 0x03
|
|
#define MSOFFSET 0x0C
|
|
#define ATAOFFSET 0x0a
|
|
#define LCDOFFSET 0x06
|
|
#define AUDOFFSET 0x04
|
|
#define CPUOFFSET 0x00
|
|
|
|
static DEFINE_MUTEX(clksel_sem);
|
|
|
|
static void clock_source_select(const char *dev_id, unsigned int clkval)
|
|
{
|
|
unsigned int clksel, offset;
|
|
|
|
clksel = __raw_readl(REG_CLKSEL);
|
|
|
|
if (strcmp(dev_id, "nuc900-ms") == 0)
|
|
offset = MSOFFSET;
|
|
else if (strcmp(dev_id, "nuc900-atapi") == 0)
|
|
offset = ATAOFFSET;
|
|
else if (strcmp(dev_id, "nuc900-lcd") == 0)
|
|
offset = LCDOFFSET;
|
|
else if (strcmp(dev_id, "nuc900-audio") == 0)
|
|
offset = AUDOFFSET;
|
|
else
|
|
offset = CPUOFFSET;
|
|
|
|
clksel &= ~(0x03 << offset);
|
|
clksel |= (clkval << offset);
|
|
|
|
__raw_writel(clksel, REG_CLKSEL);
|
|
}
|
|
|
|
void nuc900_clock_source(struct device *dev, unsigned char *src)
|
|
{
|
|
unsigned int clkval;
|
|
const char *dev_id;
|
|
|
|
BUG_ON(!src);
|
|
clkval = 0;
|
|
|
|
mutex_lock(&clksel_sem);
|
|
|
|
if (dev)
|
|
dev_id = dev_name(dev);
|
|
else
|
|
dev_id = "cpufreq";
|
|
|
|
if (strcmp(src, "pll0") == 0)
|
|
clkval = PLL0;
|
|
else if (strcmp(src, "pll1") == 0)
|
|
clkval = PLL1;
|
|
else if (strcmp(src, "ext") == 0)
|
|
clkval = EXT;
|
|
else if (strcmp(src, "oth") == 0)
|
|
clkval = OTHER;
|
|
|
|
clock_source_select(dev_id, clkval);
|
|
|
|
mutex_unlock(&clksel_sem);
|
|
}
|
|
EXPORT_SYMBOL(nuc900_clock_source);
|
|
|