Commit 0e4a34bb authored by wanzongshun's avatar wanzongshun Committed by Russell King
Browse files

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



Add clock api for w90p910 platform.
Signed-off-by: default avatarWan ZongShun <mcuos.com@gmail.com>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent c52d3d68
...@@ -490,6 +490,7 @@ config ARCH_W90X900 ...@@ -490,6 +490,7 @@ config ARCH_W90X900
select CPU_ARM926T select CPU_ARM926T
select ARCH_REQUIRE_GPIOLIB select ARCH_REQUIRE_GPIOLIB
select GENERIC_GPIO select GENERIC_GPIO
select COMMON_CLKDEV
help help
Support for Nuvoton (Winbond logic dept.) ARM9 processor,You Support for Nuvoton (Winbond logic dept.) ARM9 processor,You
can login www.mcuos.com or www.nuvoton.com to know more. can login www.mcuos.com or www.nuvoton.com to know more.
......
...@@ -4,7 +4,7 @@ ...@@ -4,7 +4,7 @@
# Object file lists. # 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 # W90X900 CPU support files
......
/*
* 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]);
}
/*
* 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, \
}
...@@ -41,7 +41,7 @@ struct sys_timer; ...@@ -41,7 +41,7 @@ struct sys_timer;
extern void w90x900_init_irq(void); extern void w90x900_init_irq(void);
extern void w90p910_init_io(struct map_desc *mach_desc, int size); 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_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 void w90p910_map_io(struct map_desc *mach_desc, int size);
extern struct platform_device w90p910_serial_device; extern struct platform_device w90p910_serial_device;
extern struct sys_timer w90x900_timer; extern struct sys_timer w90x900_timer;
......
#ifndef __ASM_MACH_CLKDEV_H
#define __ASM_MACH_CLKDEV_H
#define __clk_get(clk) ({ 1; })
#define __clk_put(clk) do { } while (0)
#endif
...@@ -247,7 +247,7 @@ static struct platform_device *w90p910evb_dev[] __initdata = { ...@@ -247,7 +247,7 @@ static struct platform_device *w90p910evb_dev[] __initdata = {
static void __init w90p910evb_map_io(void) static void __init w90p910evb_map_io(void)
{ {
w90p910_map_io(w90p910_iodesc, ARRAY_SIZE(w90p910_iodesc)); w90p910_map_io(w90p910_iodesc, ARRAY_SIZE(w90p910_iodesc));
w90p910_init_clocks(0); w90p910_init_clocks();
} }
static void __init w90p910evb_init(void) static void __init w90p910evb_init(void)
......
...@@ -34,6 +34,7 @@ ...@@ -34,6 +34,7 @@
#include <mach/regs-serial.h> #include <mach/regs-serial.h>
#include "cpu.h" #include "cpu.h"
#include "clock.h"
/* Initial IO mappings */ /* Initial IO mappings */
...@@ -52,6 +53,43 @@ static struct map_desc w90p910_iodesc[] __initdata = { ...@@ -52,6 +53,43 @@ static struct map_desc w90p910_iodesc[] __initdata = {
/*IODESC_ENT(LCD),*/ /*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 */ /* Initial serial platform data */
struct plat_serial8250_port w90p910_uart_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) ...@@ -81,8 +119,9 @@ void __init w90p910_map_io(struct map_desc *mach_desc, int mach_size)
/*Init W90P910 clock*/ /*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) static int __init w90p910_init_cpu(void)
......
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