diff options
Diffstat (limited to 'arch/arm/mach-w90x900')
| -rw-r--r-- | arch/arm/mach-w90x900/Makefile | 2 | ||||
| -rw-r--r-- | arch/arm/mach-w90x900/clock.c | 77 | ||||
| -rw-r--r-- | arch/arm/mach-w90x900/clock.h | 36 | ||||
| -rw-r--r-- | arch/arm/mach-w90x900/cpu.h | 2 | ||||
| -rw-r--r-- | arch/arm/mach-w90x900/include/mach/clkdev.h | 7 | ||||
| -rw-r--r-- | arch/arm/mach-w90x900/mach-w90p910evb.c | 2 | ||||
| -rw-r--r-- | arch/arm/mach-w90x900/w90p910.c | 41 |
7 files changed, 163 insertions, 4 deletions
diff --git a/arch/arm/mach-w90x900/Makefile b/arch/arm/mach-w90x900/Makefile index 6287268cde4c..d50c94f4dbdf 100644 --- a/arch/arm/mach-w90x900/Makefile +++ b/arch/arm/mach-w90x900/Makefile @@ -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 diff --git a/arch/arm/mach-w90x900/clock.c b/arch/arm/mach-w90x900/clock.c new file mode 100644 index 000000000000..f420613cd395 --- /dev/null +++ b/arch/arm/mach-w90x900/clock.c @@ -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]); +} diff --git a/arch/arm/mach-w90x900/clock.h b/arch/arm/mach-w90x900/clock.h new file mode 100644 index 000000000000..4f27bda76d56 --- /dev/null +++ b/arch/arm/mach-w90x900/clock.h @@ -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, \ + } + diff --git a/arch/arm/mach-w90x900/cpu.h b/arch/arm/mach-w90x900/cpu.h index de29ddcb9459..57b5dbabeb41 100644 --- a/arch/arm/mach-w90x900/cpu.h +++ b/arch/arm/mach-w90x900/cpu.h @@ -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; diff --git a/arch/arm/mach-w90x900/include/mach/clkdev.h b/arch/arm/mach-w90x900/include/mach/clkdev.h new file mode 100644 index 000000000000..04b37a89801c --- /dev/null +++ b/arch/arm/mach-w90x900/include/mach/clkdev.h @@ -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 diff --git a/arch/arm/mach-w90x900/mach-w90p910evb.c b/arch/arm/mach-w90x900/mach-w90p910evb.c index 1968ed428b72..7a62bd348e80 100644 --- a/arch/arm/mach-w90x900/mach-w90p910evb.c +++ b/arch/arm/mach-w90x900/mach-w90p910evb.c @@ -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) diff --git a/arch/arm/mach-w90x900/w90p910.c b/arch/arm/mach-w90x900/w90p910.c index 87214b8896e7..1c97e4930b7a 100644 --- a/arch/arm/mach-w90x900/w90p910.c +++ b/arch/arm/mach-w90x900/w90p910.c @@ -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) |