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f596575e81
The generic LED code now makes sure that suspended devices don't blink, so we no longer need to do it ourselves. For the suspend to disk case, however, we need to make sure that we don't blink if the PMU sysdev was suspended before the LED device. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
116 lines
3.1 KiB
C
116 lines
3.1 KiB
C
/*
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* via-pmu LED class device
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*
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* Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
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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, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
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* NON INFRINGEMENT. See the GNU General Public License for more
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* 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <linux/device.h>
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#include <linux/leds.h>
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#include <linux/adb.h>
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#include <linux/pmu.h>
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#include <asm/prom.h>
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static spinlock_t pmu_blink_lock;
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static struct adb_request pmu_blink_req;
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/* -1: no change, 0: request off, 1: request on */
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static int requested_change;
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static void pmu_req_done(struct adb_request * req)
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{
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unsigned long flags;
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spin_lock_irqsave(&pmu_blink_lock, flags);
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/* if someone requested a change in the meantime
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* (we only see the last one which is fine)
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* then apply it now */
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if (requested_change != -1 && !pmu_sys_suspended)
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pmu_request(&pmu_blink_req, NULL, 4, 0xee, 4, 0, requested_change);
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/* reset requested change */
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requested_change = -1;
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spin_unlock_irqrestore(&pmu_blink_lock, flags);
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}
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static void pmu_led_set(struct led_classdev *led_cdev,
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enum led_brightness brightness)
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{
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unsigned long flags;
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spin_lock_irqsave(&pmu_blink_lock, flags);
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switch (brightness) {
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case LED_OFF:
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requested_change = 0;
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break;
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case LED_FULL:
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requested_change = 1;
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break;
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default:
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goto out;
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break;
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}
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/* if request isn't done, then don't do anything */
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if (pmu_blink_req.complete && !pmu_sys_suspended)
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pmu_request(&pmu_blink_req, NULL, 4, 0xee, 4, 0, requested_change);
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out:
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spin_unlock_irqrestore(&pmu_blink_lock, flags);
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}
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static struct led_classdev pmu_led = {
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.name = "pmu-front-led",
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#ifdef CONFIG_ADB_PMU_LED_IDE
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.default_trigger = "ide-disk",
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#endif
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.brightness_set = pmu_led_set,
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};
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static int __init via_pmu_led_init(void)
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{
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struct device_node *dt;
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const char *model;
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/* only do this on keylargo based models */
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if (pmu_get_model() != PMU_KEYLARGO_BASED)
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return -ENODEV;
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dt = of_find_node_by_path("/");
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if (dt == NULL)
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return -ENODEV;
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model = of_get_property(dt, "model", NULL);
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if (model == NULL)
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return -ENODEV;
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if (strncmp(model, "PowerBook", strlen("PowerBook")) != 0 &&
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strncmp(model, "iBook", strlen("iBook")) != 0 &&
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strcmp(model, "PowerMac7,2") != 0 &&
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strcmp(model, "PowerMac7,3") != 0) {
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of_node_put(dt);
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/* ignore */
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return -ENODEV;
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}
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of_node_put(dt);
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spin_lock_init(&pmu_blink_lock);
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/* no outstanding req */
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pmu_blink_req.complete = 1;
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pmu_blink_req.done = pmu_req_done;
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return led_classdev_register(NULL, &pmu_led);
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}
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late_initcall(via_pmu_led_init);
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