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[ARM] 3393/2: AT91RM9200 LED support

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Patch from Andrew Victor

This patch adds support for the LED(s) on the AT91RM9200-based boards.

(This version of the patch can be applied before Patch 3392/1)

Signed-off-by: Andrew Victor <andrew@sanpeople.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Andrew Victor 2006-04-02 17:15:48 +01:00 committed by Russell King
parent b2e6f75597
commit cc2832a131
8 changed files with 141 additions and 4 deletions
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9
arch/arm/mach-at91rm9200/Makefile
View file

@ -16,11 +16,12 @@ obj-$(CONFIG_MACH_CSB637) += board-csb637.o
#obj-$(CONFIG_MACH_KB9200) += board-kb9202.o
# LEDs support
#led-$(CONFIG_ARCH_AT91RM9200DK) += leds.o
#led-$(CONFIG_MACH_AT91RM9200EK) += leds.o
#led-$(CONFIG_MACH_CSB337) += leds.o
#led-$(CONFIG_MACH_CSB637) += leds.o
led-$(CONFIG_ARCH_AT91RM9200DK) += leds.o
led-$(CONFIG_MACH_AT91RM9200EK) += leds.o
led-$(CONFIG_MACH_CSB337) += leds.o
led-$(CONFIG_MACH_CSB637) += leds.o
#led-$(CONFIG_MACH_KB9200) += leds.o
#led-$(CONFIG_MACH_KAFA) += leds.o
obj-$(CONFIG_LEDS) += $(led-y)
# VGA support

3
arch/arm/mach-at91rm9200/board-csb337.c
View file

@ -67,6 +67,9 @@ static void __init csb337_map_io(void)
/* Initialize clocks: 3.6864 MHz crystal */
at91_clock_init(3686400);
/* Setup the LEDs */
at91_init_leds(AT91_PIN_PB2, AT91_PIN_PB2);
#ifdef CONFIG_SERIAL_AT91
at91_console_port = CSB337_SERIAL_CONSOLE;
memcpy(at91_serial_map, serial, sizeof(serial));

3
arch/arm/mach-at91rm9200/board-csb637.c
View file

@ -67,6 +67,9 @@ static void __init csb637_map_io(void)
/* Initialize clocks: 3.6864 MHz crystal */
at91_clock_init(3686400);
/* Setup the LEDs */
at91_init_leds(AT91_PIN_PB2, AT91_PIN_PB2);
#ifdef CONFIG_SERIAL_AT91
at91_console_port = CSB637_SERIAL_CONSOLE;
memcpy(at91_serial_map, serial, sizeof(serial));

3
arch/arm/mach-at91rm9200/board-dk.c
View file

@ -70,6 +70,9 @@ static void __init dk_map_io(void)
/* Initialize clocks: 18.432 MHz crystal */
at91_clock_init(18432000);
/* Setup the LEDs */
at91_init_leds(AT91_PIN_PB2, AT91_PIN_PB2);
#ifdef CONFIG_SERIAL_AT91
at91_console_port = DK_SERIAL_CONSOLE;
memcpy(at91_serial_map, serial, sizeof(serial));

3
arch/arm/mach-at91rm9200/board-ek.c
View file

@ -70,6 +70,9 @@ static void __init ek_map_io(void)
/* Initialize clocks: 18.432 MHz crystal */
at91_clock_init(18432000);
/* Setup the LEDs */
at91_init_leds(AT91_PIN_PB1, AT91_PIN_PB2);
#ifdef CONFIG_SERIAL_AT91
at91_console_port = EK_SERIAL_CONSOLE;
memcpy(at91_serial_map, serial, sizeof(serial));

19
arch/arm/mach-at91rm9200/devices.c
View file

@ -290,4 +290,23 @@ void __init at91_add_device_mmc(struct at91_mmc_data *data)
void __init at91_add_device_mmc(struct at91_mmc_data *data) {}
#endif
/* --------------------------------------------------------------------
* LEDs
* -------------------------------------------------------------------- */
#if defined(CONFIG_LEDS)
u8 at91_leds_cpu;
u8 at91_leds_timer;
void __init at91_init_leds(u8 cpu_led, u8 timer_led)
{
at91_leds_cpu = cpu_led;
at91_leds_timer = timer_led;
}
#else
void __init at91_init_leds(u8 cpu_led, u8 timer_led) {}
#endif
/* -------------------------------------------------------------------- */

100
arch/arm/mach-at91rm9200/leds.c Normal file
View file

@ -0,0 +1,100 @@
/*
* LED driver for Atmel AT91-based boards.
*
* Copyright (C) SAN People (Pty) Ltd
*
* 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, or (at your option) any later version.
*/
#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <asm/mach-types.h>
#include <asm/leds.h>
#include <asm/arch/board.h>
#include <asm/arch/gpio.h>
static inline void at91_led_on(unsigned int led)
{
at91_set_gpio_value(led, 0);
}
static inline void at91_led_off(unsigned int led)
{
at91_set_gpio_value(led, 1);
}
static inline void at91_led_toggle(unsigned int led)
{
unsigned long is_off = at91_get_gpio_value(led);
if (is_off)
at91_led_on(led);
else
at91_led_off(led);
}
/*
* Handle LED events.
*/
static void at91_leds_event(led_event_t evt)
{
unsigned long flags;
local_irq_save(flags);
switch(evt) {
case led_start: /* System startup */
at91_led_on(at91_leds_cpu);
break;
case led_stop: /* System stop / suspend */
at91_led_off(at91_leds_cpu);
break;
#ifdef CONFIG_LEDS_TIMER
case led_timer: /* Every 50 timer ticks */
at91_led_toggle(at91_leds_timer);
break;
#endif
#ifdef CONFIG_LEDS_CPU
case led_idle_start: /* Entering idle state */
at91_led_off(at91_leds_cpu);
break;
case led_idle_end: /* Exit idle state */
at91_led_on(at91_leds_cpu);
break;
#endif
default:
break;
}
local_irq_restore(flags);
}
static int __init leds_init(void)
{
if (!at91_leds_timer || !at91_leds_cpu)
return -ENODEV;
/* Enable PIO to access the LEDs */
at91_set_gpio_output(at91_leds_timer, 1);
at91_set_gpio_output(at91_leds_cpu, 1);
leds_event = at91_leds_event;
leds_event(led_start);
return 0;
}
__initcall(leds_init);

5
include/asm-arm/arch-at91rm9200/board.h
View file

@ -77,4 +77,9 @@ struct at91_usbh_data {
};
extern void __init at91_add_device_usbh(struct at91_usbh_data *data);
/* LEDs */
extern u8 at91_leds_cpu;
extern u8 at91_leds_timer;
extern void __init at91_init_leds(u8 cpu_led, u8 timer_led);
#endif