forked from Minki/linux
ARM: mach-integrator: retire custom LED code
Use the LED in core module for CPU activity and also enable 4 debugging LEDs in baseboard. The CPU activity LED is now handled by the trigger in the leds subsystem, retire this old CONFIG_LEDS-based code. Signed-off-by: Bryan Wu <bryan.wu@canonical.com>
This commit is contained in:
Bryan Wu
parent
b7ea032e8a
commit
95f4965cf8
@ -4,11 +4,10 @@
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# Object file lists.
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obj-y := core.o lm.o
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obj-y := core.o lm.o leds.o
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obj-$(CONFIG_ARCH_INTEGRATOR_AP) += integrator_ap.o
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obj-$(CONFIG_ARCH_INTEGRATOR_CP) += integrator_cp.o
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obj-$(CONFIG_LEDS) += leds.o
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obj-$(CONFIG_PCI) += pci_v3.o pci.o
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obj-$(CONFIG_CPU_FREQ_INTEGRATOR) += cpu.o
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obj-$(CONFIG_INTEGRATOR_IMPD1) += impd1.o
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@ -28,7 +28,6 @@
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#include <mach/cm.h>
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#include <mach/irqs.h>
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#include <asm/leds.h>
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#include <asm/mach-types.h>
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#include <asm/mach/time.h>
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#include <asm/pgtable.h>
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@ -1,90 +1,125 @@
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/*
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* linux/arch/arm/mach-integrator/leds.c
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* Driver for the 4 user LEDs found on the Integrator AP/CP baseboard
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* Based on Versatile and RealView machine LED code
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*
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* Integrator/AP and Integrator/CP LED control routines
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*
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* Copyright (C) 1999 ARM Limited
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* Copyright (C) 2000 Deep Blue Solutions Ltd
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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, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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* License terms: GNU General Public License (GPL) version 2
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* Author: Bryan Wu <bryan.wu@canonical.com>
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/smp.h>
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#include <linux/spinlock.h>
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#include <linux/io.h>
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#include <linux/slab.h>
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#include <linux/leds.h>
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#include <mach/cm.h>
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#include <mach/hardware.h>
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#include <mach/platform.h>
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#include <asm/leds.h>
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#include <asm/mach-types.h>
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#include <mach/cm.h>
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static int saved_leds;
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#if defined(CONFIG_NEW_LEDS) && defined(CONFIG_LEDS_CLASS)
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static void integrator_leds_event(led_event_t ledevt)
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#define ALPHA_REG __io_address(INTEGRATOR_DBG_BASE)
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#define LEDREG (__io_address(INTEGRATOR_DBG_BASE) + INTEGRATOR_DBG_LEDS_OFFSET)
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struct integrator_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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} integrator_leds[] = {
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{ "integrator:green0", "heartbeat", },
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{ "integrator:yellow", },
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{ "integrator:red", },
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{ "integrator:green1", },
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{ "integrator:core_module", "cpu0", },
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};
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static void integrator_led_set(struct led_classdev *cdev,
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enum led_brightness b)
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{
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unsigned long flags;
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const unsigned int dbg_base = IO_ADDRESS(INTEGRATOR_DBG_BASE);
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unsigned int update_alpha_leds;
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struct integrator_led *led = container_of(cdev,
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struct integrator_led, cdev);
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u32 reg = __raw_readl(LEDREG);
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// yup, change the LEDs
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local_irq_save(flags);
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update_alpha_leds = 0;
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if (b != LED_OFF)
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reg |= led->mask;
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else
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reg &= ~led->mask;
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switch(ledevt) {
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case led_idle_start:
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cm_control(CM_CTRL_LED, 0);
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break;
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while (__raw_readl(ALPHA_REG) & 1)
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cpu_relax();
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case led_idle_end:
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cm_control(CM_CTRL_LED, CM_CTRL_LED);
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break;
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case led_timer:
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saved_leds ^= GREEN_LED;
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update_alpha_leds = 1;
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break;
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case led_red_on:
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saved_leds |= RED_LED;
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update_alpha_leds = 1;
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break;
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case led_red_off:
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saved_leds &= ~RED_LED;
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update_alpha_leds = 1;
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break;
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default:
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break;
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}
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if (update_alpha_leds) {
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while (__raw_readl(dbg_base + INTEGRATOR_DBG_ALPHA_OFFSET) & 1);
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__raw_writel(saved_leds, dbg_base + INTEGRATOR_DBG_LEDS_OFFSET);
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}
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local_irq_restore(flags);
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__raw_writel(reg, LEDREG);
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}
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static int __init leds_init(void)
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static enum led_brightness integrator_led_get(struct led_classdev *cdev)
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{
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if (machine_is_integrator() || machine_is_cintegrator())
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leds_event = integrator_leds_event;
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struct integrator_led *led = container_of(cdev,
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struct integrator_led, cdev);
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u32 reg = __raw_readl(LEDREG);
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return (reg & led->mask) ? LED_FULL : LED_OFF;
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}
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static void cm_led_set(struct led_classdev *cdev,
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enum led_brightness b)
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{
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if (b != LED_OFF)
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cm_control(CM_CTRL_LED, CM_CTRL_LED);
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else
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cm_control(CM_CTRL_LED, 0);
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}
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static enum led_brightness cm_led_get(struct led_classdev *cdev)
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{
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u32 reg = readl(CM_CTRL);
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return (reg & CM_CTRL_LED) ? LED_FULL : LED_OFF;
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}
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static int __init integrator_leds_init(void)
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{
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int i;
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for (i = 0; i < ARRAY_SIZE(integrator_leds); i++) {
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struct integrator_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 = integrator_leds[i].name;
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if (i == 4) { /* Setting for LED in core module */
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led->cdev.brightness_set = cm_led_set;
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led->cdev.brightness_get = cm_led_get;
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} else {
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led->cdev.brightness_set = integrator_led_set;
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led->cdev.brightness_get = integrator_led_get;
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}
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led->cdev.default_trigger = integrator_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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core_initcall(leds_init);
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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(integrator_leds_init);
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#endif
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