[ARM] 5549/1: Add clock api for w90p910 platform.
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>
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@ -490,6 +490,7 @@ config ARCH_W90X900
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select CPU_ARM926T
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select ARCH_REQUIRE_GPIOLIB
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select GENERIC_GPIO
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select COMMON_CLKDEV
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help
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Support for Nuvoton (Winbond logic dept.) ARM9 processor,You
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can login www.mcuos.com or www.nuvoton.com to know more.
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@ -4,7 +4,7 @@
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# Object file lists.
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obj-y := irq.o time.o mfp-w90p910.o gpio.o
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obj-y := irq.o time.o mfp-w90p910.o gpio.o clock.o
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# W90X900 CPU support files
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77
arch/arm/mach-w90x900/clock.c
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77
arch/arm/mach-w90x900/clock.c
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@ -0,0 +1,77 @@
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/*
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* linux/arch/arm/mach-w90x900/clock.c
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*
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* Copyright (c) 2008 Nuvoton technology corporation
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*
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* Wan ZongShun <mcuos.com@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License.
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/list.h>
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#include <linux/errno.h>
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#include <linux/err.h>
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#include <linux/string.h>
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#include <linux/clk.h>
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#include <linux/spinlock.h>
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#include <linux/platform_device.h>
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#include <linux/io.h>
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#include <mach/hardware.h>
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#include "clock.h"
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static DEFINE_SPINLOCK(clocks_lock);
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int clk_enable(struct clk *clk)
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{
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unsigned long flags;
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spin_lock_irqsave(&clocks_lock, flags);
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if (clk->enabled++ == 0)
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(clk->enable)(clk, 1);
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spin_unlock_irqrestore(&clocks_lock, flags);
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return 0;
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}
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EXPORT_SYMBOL(clk_enable);
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void clk_disable(struct clk *clk)
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{
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unsigned long flags;
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WARN_ON(clk->enabled == 0);
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spin_lock_irqsave(&clocks_lock, flags);
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if (--clk->enabled == 0)
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(clk->enable)(clk, 0);
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spin_unlock_irqrestore(&clocks_lock, flags);
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}
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EXPORT_SYMBOL(clk_disable);
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void w90x900_clk_enable(struct clk *clk, int enable)
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{
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unsigned int clocks = clk->cken;
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unsigned long clken;
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clken = __raw_readl(W90X900_VA_CLKPWR);
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if (enable)
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clken |= clocks;
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else
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clken &= ~clocks;
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__raw_writel(clken, W90X900_VA_CLKPWR);
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}
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void clks_register(struct clk_lookup *clks, size_t num)
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{
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int i;
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for (i = 0; i < num; i++)
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clkdev_add(&clks[i]);
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}
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36
arch/arm/mach-w90x900/clock.h
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36
arch/arm/mach-w90x900/clock.h
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@ -0,0 +1,36 @@
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/*
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* linux/arch/arm/mach-w90x900/clock.h
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*
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* Copyright (c) 2008 Nuvoton technology corporation
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*
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* Wan ZongShun <mcuos.com@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License.
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*/
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#include <asm/clkdev.h>
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void w90x900_clk_enable(struct clk *clk, int enable);
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void clks_register(struct clk_lookup *clks, size_t num);
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struct clk {
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unsigned long cken;
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unsigned int enabled;
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void (*enable)(struct clk *, int enable);
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};
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#define DEFINE_CLK(_name, _ctrlbit) \
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struct clk clk_##_name = { \
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.enable = w90x900_clk_enable, \
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.cken = (1 << _ctrlbit), \
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}
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#define DEF_CLKLOOK(_clk, _devname, _conname) \
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{ \
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.clk = _clk, \
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.dev_id = _devname, \
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.con_id = _conname, \
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}
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@ -41,7 +41,7 @@ struct sys_timer;
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extern void w90x900_init_irq(void);
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extern void w90p910_init_io(struct map_desc *mach_desc, int size);
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extern void w90p910_init_uarts(struct w90x900_uartcfg *cfg, int no);
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extern void w90p910_init_clocks(int xtal);
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extern void w90p910_init_clocks(void);
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extern void w90p910_map_io(struct map_desc *mach_desc, int size);
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extern struct platform_device w90p910_serial_device;
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extern struct sys_timer w90x900_timer;
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7
arch/arm/mach-w90x900/include/mach/clkdev.h
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7
arch/arm/mach-w90x900/include/mach/clkdev.h
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@ -0,0 +1,7 @@
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#ifndef __ASM_MACH_CLKDEV_H
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#define __ASM_MACH_CLKDEV_H
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#define __clk_get(clk) ({ 1; })
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#define __clk_put(clk) do { } while (0)
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#endif
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@ -247,7 +247,7 @@ static struct platform_device *w90p910evb_dev[] __initdata = {
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static void __init w90p910evb_map_io(void)
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{
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w90p910_map_io(w90p910_iodesc, ARRAY_SIZE(w90p910_iodesc));
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w90p910_init_clocks(0);
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w90p910_init_clocks();
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}
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static void __init w90p910evb_init(void)
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@ -34,6 +34,7 @@
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#include <mach/regs-serial.h>
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#include "cpu.h"
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#include "clock.h"
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/* Initial IO mappings */
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@ -52,6 +53,43 @@ static struct map_desc w90p910_iodesc[] __initdata = {
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/*IODESC_ENT(LCD),*/
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};
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/* Initial clock declarations. */
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static DEFINE_CLK(lcd, 0);
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static DEFINE_CLK(audio, 1);
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static DEFINE_CLK(fmi, 4);
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static DEFINE_CLK(dmac, 5);
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static DEFINE_CLK(atapi, 6);
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static DEFINE_CLK(emc, 7);
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static DEFINE_CLK(usbd, 8);
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static DEFINE_CLK(usbh, 9);
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static DEFINE_CLK(g2d, 10);;
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static DEFINE_CLK(pwm, 18);
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static DEFINE_CLK(ps2, 24);
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static DEFINE_CLK(kpi, 25);
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static DEFINE_CLK(wdt, 26);
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static DEFINE_CLK(gdma, 27);
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static DEFINE_CLK(adc, 28);
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static DEFINE_CLK(usi, 29);
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static struct clk_lookup w90p910_clkregs[] = {
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DEF_CLKLOOK(&clk_lcd, "w90p910-lcd", NULL),
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DEF_CLKLOOK(&clk_audio, "w90p910-audio", NULL),
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DEF_CLKLOOK(&clk_fmi, "w90p910-fmi", NULL),
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DEF_CLKLOOK(&clk_dmac, "w90p910-dmac", NULL),
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DEF_CLKLOOK(&clk_atapi, "w90p910-atapi", NULL),
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DEF_CLKLOOK(&clk_emc, "w90p910-emc", NULL),
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DEF_CLKLOOK(&clk_usbd, "w90p910-usbd", NULL),
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DEF_CLKLOOK(&clk_usbh, "w90p910-usbh", NULL),
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DEF_CLKLOOK(&clk_g2d, "w90p910-g2d", NULL),
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DEF_CLKLOOK(&clk_pwm, "w90p910-pwm", NULL),
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DEF_CLKLOOK(&clk_ps2, "w90p910-ps2", NULL),
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DEF_CLKLOOK(&clk_kpi, "w90p910-kpi", NULL),
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DEF_CLKLOOK(&clk_wdt, "w90p910-wdt", NULL),
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DEF_CLKLOOK(&clk_gdma, "w90p910-gdma", NULL),
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DEF_CLKLOOK(&clk_adc, "w90p910-adc", NULL),
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DEF_CLKLOOK(&clk_usi, "w90p910-usi", NULL),
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};
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/* Initial serial platform data */
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struct plat_serial8250_port w90p910_uart_data[] = {
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/*Init W90P910 clock*/
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void __init w90p910_init_clocks(int xtal)
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void __init w90p910_init_clocks(void)
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{
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clks_register(w90p910_clkregs, ARRAY_SIZE(w90p910_clkregs));
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}
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static int __init w90p910_init_cpu(void)
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