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124 lines
2.6 KiB
124 lines
2.6 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* linux/arch/arm/mach-footbridge/ebsa285.c |
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* |
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* EBSA285 machine fixup |
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*/ |
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#include <linux/init.h> |
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#include <linux/io.h> |
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#include <linux/spinlock.h> |
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#include <linux/slab.h> |
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#include <linux/leds.h> |
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#include <asm/hardware/dec21285.h> |
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#include <asm/mach-types.h> |
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#include <asm/mach/arch.h> |
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#include "common.h" |
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/* LEDs */ |
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#if defined(CONFIG_NEW_LEDS) && defined(CONFIG_LEDS_CLASS) |
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#define XBUS_AMBER_L BIT(0) |
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#define XBUS_GREEN_L BIT(1) |
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#define XBUS_RED_L BIT(2) |
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#define XBUS_TOGGLE BIT(7) |
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struct ebsa285_led { |
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struct led_classdev cdev; |
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u8 mask; |
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}; |
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/* |
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* The triggers lines up below will only be used if the |
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* LED triggers are compiled in. |
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*/ |
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static const struct { |
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const char *name; |
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const char *trigger; |
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} ebsa285_leds[] = { |
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{ "ebsa285:amber", "cpu0", }, |
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{ "ebsa285:green", "heartbeat", }, |
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{ "ebsa285:red",}, |
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}; |
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static unsigned char hw_led_state; |
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static void __iomem *xbus; |
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static void ebsa285_led_set(struct led_classdev *cdev, |
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enum led_brightness b) |
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{ |
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struct ebsa285_led *led = container_of(cdev, |
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struct ebsa285_led, cdev); |
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if (b == LED_OFF) |
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hw_led_state |= led->mask; |
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else |
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hw_led_state &= ~led->mask; |
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writeb(hw_led_state, xbus); |
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} |
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static enum led_brightness ebsa285_led_get(struct led_classdev *cdev) |
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{ |
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struct ebsa285_led *led = container_of(cdev, |
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struct ebsa285_led, cdev); |
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return hw_led_state & led->mask ? LED_OFF : LED_FULL; |
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} |
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static int __init ebsa285_leds_init(void) |
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{ |
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int i; |
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if (!machine_is_ebsa285()) |
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return -ENODEV; |
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xbus = ioremap(XBUS_CS2, SZ_4K); |
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if (!xbus) |
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return -ENOMEM; |
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/* 3 LEDS all off */ |
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hw_led_state = XBUS_AMBER_L | XBUS_GREEN_L | XBUS_RED_L; |
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writeb(hw_led_state, xbus); |
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for (i = 0; i < ARRAY_SIZE(ebsa285_leds); i++) { |
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struct ebsa285_led *led; |
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led = kzalloc(sizeof(*led), GFP_KERNEL); |
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if (!led) |
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break; |
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led->cdev.name = ebsa285_leds[i].name; |
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led->cdev.brightness_set = ebsa285_led_set; |
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led->cdev.brightness_get = ebsa285_led_get; |
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led->cdev.default_trigger = ebsa285_leds[i].trigger; |
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led->mask = BIT(i); |
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if (led_classdev_register(NULL, &led->cdev) < 0) { |
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kfree(led); |
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break; |
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} |
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} |
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return 0; |
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} |
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/* |
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* Since we may have triggers on any subsystem, defer registration |
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* until after subsystem_init. |
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*/ |
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fs_initcall(ebsa285_leds_init); |
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#endif |
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MACHINE_START(EBSA285, "EBSA285") |
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/* Maintainer: Russell King */ |
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.atag_offset = 0x100, |
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.video_start = 0x000a0000, |
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.video_end = 0x000bffff, |
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.map_io = footbridge_map_io, |
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.init_early = footbridge_sched_clock, |
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.init_irq = footbridge_init_irq, |
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.init_time = footbridge_timer_init, |
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.restart = footbridge_restart, |
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MACHINE_END |
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