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author | Linus Torvalds <torvalds@linux-foundation.org> | 2009-09-14 17:48:14 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-09-14 17:48:14 -0700 |
commit | 2ca7d674d7ab2220707b2ada0b690c0e7c95e7ac (patch) | |
tree | 9c0927ed1d540e5fd704c1f82689870786514655 /arch/arm/mach-w90x900/clksel.c | |
parent | 2195d2818c37bdf263865f1e9effccdd9fc5f9d4 (diff) | |
parent | 87d721ad7a37b7650dd710c88dd5c6a5bf9fe996 (diff) |
Merge branch 'devel' of master.kernel.org:/home/rmk/linux-2.6-arm
* 'devel' of master.kernel.org:/home/rmk/linux-2.6-arm: (257 commits)
[ARM] Update mach-types
ARM: 5636/1: Move vendor enum to AMBA include
ARM: Fix pfn_valid() for sparse memory
[ARM] orion5x: Add LaCie NAS 2Big Network support
[ARM] pxa/sharpsl_pm: zaurus c3000 aka spitz: fix resume
ARM: 5686/1: at91: Correct AC97 reset line in at91sam9263ek board
ARM: 5640/1: This patch modifies the support of AC97 on the at91sam9263 ek board
ARM: 5689/1: Update default config of HP Jornada 700-series machines
ARM: 5691/1: fix cache aliasing issues between kmap() and kmap_atomic() with highmem
ARM: 5688/1: ks8695_serial: disable_irq() lockup
ARM: 5687/1: fix an oops with highmem
ARM: 5684/1: Add nuc960 platform to w90x900
ARM: 5683/1: Add nuc950 platform to w90x900
ARM: 5682/1: Add cpu.c and dev.c and modify some files of w90p910 platform
ARM: 5626/1: add suspend/resume functions to amba-pl011 serial driver
ARM: 5625/1: fix hard coded 4K resource size in amba bus detection
MMC: MMCI: convert realview MMC to use gpiolib
ARM: 5685/1: Make MMCI driver compile without gpiolib
ARM: implement highpte
ARM: Show FIQ in /proc/interrupts on CONFIG_FIQ
...
Fix up trivial conflict in arch/arm/kernel/signal.c.
It was due to the TIF_NOTIFY_RESUME addition in commit d0420c83f ("KEYS:
Extend TIF_NOTIFY_RESUME to (almost) all architectures") and follow-ups.
Diffstat (limited to 'arch/arm/mach-w90x900/clksel.c')
-rw-r--r-- | arch/arm/mach-w90x900/clksel.c | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/arch/arm/mach-w90x900/clksel.c b/arch/arm/mach-w90x900/clksel.c new file mode 100644 index 00000000000..3de4a5211c3 --- /dev/null +++ b/arch/arm/mach-w90x900/clksel.c @@ -0,0 +1,91 @@ +/* + * 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); + |