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[ARM] 5549/1: Add clock api for w90p910 platform.

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Add clock api for w90p910 platform.

Signed-off-by: Wan ZongShun <mcuos.com@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
wanzongshun 2009-06-10 15:50:44 +01:00 committed by Russell King
parent c52d3d688b
commit 0e4a34bb65
8 changed files with 164 additions and 4 deletions
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1
arch/arm/Kconfig
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@ -490,6 +490,7 @@ config ARCH_W90X900
select CPU_ARM926T
select ARCH_REQUIRE_GPIOLIB
select GENERIC_GPIO
select COMMON_CLKDEV
help
Support for Nuvoton (Winbond logic dept.) ARM9 processor,You
can login www.mcuos.com or www.nuvoton.com to know more.

2
arch/arm/mach-w90x900/Makefile
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@ -4,7 +4,7 @@
# Object file lists.
obj-y := irq.o time.o mfp-w90p910.o gpio.o
obj-y := irq.o time.o mfp-w90p910.o gpio.o clock.o
# W90X900 CPU support files

77
arch/arm/mach-w90x900/clock.c Normal file
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@ -0,0 +1,77 @@
/*
* linux/arch/arm/mach-w90x900/clock.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; either version 2 of the License.
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/errno.h>
#include <linux/err.h>
#include <linux/string.h>
#include <linux/clk.h>
#include <linux/spinlock.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <mach/hardware.h>
#include "clock.h"
static DEFINE_SPINLOCK(clocks_lock);
int clk_enable(struct clk *clk)
{
unsigned long flags;
spin_lock_irqsave(&clocks_lock, flags);
if (clk->enabled++ == 0)
(clk->enable)(clk, 1);
spin_unlock_irqrestore(&clocks_lock, flags);
return 0;
}
EXPORT_SYMBOL(clk_enable);
void clk_disable(struct clk *clk)
{
unsigned long flags;
WARN_ON(clk->enabled == 0);
spin_lock_irqsave(&clocks_lock, flags);
if (--clk->enabled == 0)
(clk->enable)(clk, 0);
spin_unlock_irqrestore(&clocks_lock, flags);
}
EXPORT_SYMBOL(clk_disable);
void w90x900_clk_enable(struct clk *clk, int enable)
{
unsigned int clocks = clk->cken;
unsigned long clken;
clken = __raw_readl(W90X900_VA_CLKPWR);
if (enable)
clken |= clocks;
else
clken &= ~clocks;
__raw_writel(clken, W90X900_VA_CLKPWR);
}
void clks_register(struct clk_lookup *clks, size_t num)
{
int i;
for (i = 0; i < num; i++)
clkdev_add(&clks[i]);
}

36
arch/arm/mach-w90x900/clock.h Normal file
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@ -0,0 +1,36 @@
/*
* linux/arch/arm/mach-w90x900/clock.h
*
* 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; either version 2 of the License.
*/
#include <asm/clkdev.h>
void w90x900_clk_enable(struct clk *clk, int enable);
void clks_register(struct clk_lookup *clks, size_t num);
struct clk {
unsigned long cken;
unsigned int enabled;
void (*enable)(struct clk *, int enable);
};
#define DEFINE_CLK(_name, _ctrlbit) \
struct clk clk_##_name = { \
.enable = w90x900_clk_enable, \
.cken = (1 << _ctrlbit), \
}
#define DEF_CLKLOOK(_clk, _devname, _conname) \
{ \
.clk = _clk, \
.dev_id = _devname, \
.con_id = _conname, \
}

2
arch/arm/mach-w90x900/cpu.h
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@ -41,7 +41,7 @@ struct sys_timer;
extern void w90x900_init_irq(void);
extern void w90p910_init_io(struct map_desc *mach_desc, int size);
extern void w90p910_init_uarts(struct w90x900_uartcfg *cfg, int no);
extern void w90p910_init_clocks(int xtal);
extern void w90p910_init_clocks(void);
extern void w90p910_map_io(struct map_desc *mach_desc, int size);
extern struct platform_device w90p910_serial_device;
extern struct sys_timer w90x900_timer;

7
arch/arm/mach-w90x900/include/mach/clkdev.h Normal file
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@ -0,0 +1,7 @@
#ifndef __ASM_MACH_CLKDEV_H
#define __ASM_MACH_CLKDEV_H
#define __clk_get(clk) ({ 1; })
#define __clk_put(clk) do { } while (0)
#endif

2
arch/arm/mach-w90x900/mach-w90p910evb.c
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@ -247,7 +247,7 @@ static struct platform_device *w90p910evb_dev[] __initdata = {
static void __init w90p910evb_map_io(void)
{
w90p910_map_io(w90p910_iodesc, ARRAY_SIZE(w90p910_iodesc));
w90p910_init_clocks(0);
w90p910_init_clocks();
}
static void __init w90p910evb_init(void)

41
arch/arm/mach-w90x900/w90p910.c
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@ -34,6 +34,7 @@
#include <mach/regs-serial.h>
#include "cpu.h"
#include "clock.h"
/* Initial IO mappings */
@ -52,6 +53,43 @@ static struct map_desc w90p910_iodesc[] __initdata = {
/*IODESC_ENT(LCD),*/
};
/* Initial clock declarations. */
static DEFINE_CLK(lcd, 0);
static DEFINE_CLK(audio, 1);
static DEFINE_CLK(fmi, 4);
static DEFINE_CLK(dmac, 5);
static DEFINE_CLK(atapi, 6);
static DEFINE_CLK(emc, 7);
static DEFINE_CLK(usbd, 8);
static DEFINE_CLK(usbh, 9);
static DEFINE_CLK(g2d, 10);;
static DEFINE_CLK(pwm, 18);
static DEFINE_CLK(ps2, 24);
static DEFINE_CLK(kpi, 25);
static DEFINE_CLK(wdt, 26);
static DEFINE_CLK(gdma, 27);
static DEFINE_CLK(adc, 28);
static DEFINE_CLK(usi, 29);
static struct clk_lookup w90p910_clkregs[] = {
DEF_CLKLOOK(&clk_lcd, "w90p910-lcd", NULL),
DEF_CLKLOOK(&clk_audio, "w90p910-audio", NULL),
DEF_CLKLOOK(&clk_fmi, "w90p910-fmi", NULL),
DEF_CLKLOOK(&clk_dmac, "w90p910-dmac", NULL),
DEF_CLKLOOK(&clk_atapi, "w90p910-atapi", NULL),
DEF_CLKLOOK(&clk_emc, "w90p910-emc", NULL),
DEF_CLKLOOK(&clk_usbd, "w90p910-usbd", NULL),
DEF_CLKLOOK(&clk_usbh, "w90p910-usbh", NULL),
DEF_CLKLOOK(&clk_g2d, "w90p910-g2d", NULL),
DEF_CLKLOOK(&clk_pwm, "w90p910-pwm", NULL),
DEF_CLKLOOK(&clk_ps2, "w90p910-ps2", NULL),
DEF_CLKLOOK(&clk_kpi, "w90p910-kpi", NULL),
DEF_CLKLOOK(&clk_wdt, "w90p910-wdt", NULL),
DEF_CLKLOOK(&clk_gdma, "w90p910-gdma", NULL),
DEF_CLKLOOK(&clk_adc, "w90p910-adc", NULL),
DEF_CLKLOOK(&clk_usi, "w90p910-usi", NULL),
};
/* Initial serial platform data */
struct plat_serial8250_port w90p910_uart_data[] = {
@ -81,8 +119,9 @@ void __init w90p910_map_io(struct map_desc *mach_desc, int mach_size)
/*Init W90P910 clock*/
void __init w90p910_init_clocks(int xtal)
void __init w90p910_init_clocks(void)
{
clks_register(w90p910_clkregs, ARRAY_SIZE(w90p910_clkregs));
}
static int __init w90p910_init_cpu(void)