From ffd0db97196c1057f09c2ab42dd5b30e94e511d9 Mon Sep 17 00:00:00 2001 From: Dmitry Torokhov Date: Wed, 16 Sep 2009 01:06:43 -0700 Subject: Input: add generic suspend and resume for input devices Automatically turn off leds and sound effects as part of suspend process and restore led state, sounds and repeat rate at resume. Signed-off-by: Dmitry Torokhov --- drivers/input/input.c | 64 ++++++++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 63 insertions(+), 1 deletion(-) (limited to 'drivers/input/input.c') diff --git a/drivers/input/input.c b/drivers/input/input.c index 7c237e6ac711..b8ed4294fccd 100644 --- a/drivers/input/input.c +++ b/drivers/input/input.c @@ -11,6 +11,7 @@ */ #include +#include #include #include #include @@ -514,7 +515,7 @@ static void input_disconnect_device(struct input_dev *dev) * that there are no threads in the middle of input_open_device() */ mutex_lock(&dev->mutex); - dev->going_away = 1; + dev->going_away = true; mutex_unlock(&dev->mutex); spin_lock_irq(&dev->event_lock); @@ -1259,10 +1260,71 @@ static int input_dev_uevent(struct device *device, struct kobj_uevent_env *env) return 0; } +#define INPUT_DO_TOGGLE(dev, type, bits, on) \ + do { \ + int i; \ + if (!test_bit(EV_##type, dev->evbit)) \ + break; \ + for (i = 0; i < type##_MAX; i++) { \ + if (!test_bit(i, dev->bits##bit) || \ + !test_bit(i, dev->bits)) \ + continue; \ + dev->event(dev, EV_##type, i, on); \ + } \ + } while (0) + +static void input_dev_reset(struct input_dev *dev, bool activate) +{ + if (!dev->event) + return; + + INPUT_DO_TOGGLE(dev, LED, led, activate); + INPUT_DO_TOGGLE(dev, SND, snd, activate); + + if (activate && test_bit(EV_REP, dev->evbit)) { + dev->event(dev, EV_REP, REP_PERIOD, dev->rep[REP_PERIOD]); + dev->event(dev, EV_REP, REP_DELAY, dev->rep[REP_DELAY]); + } +} + +#ifdef CONFIG_PM +static int input_dev_suspend(struct device *dev) +{ + struct input_dev *input_dev = to_input_dev(dev); + + mutex_lock(&input_dev->mutex); + input_dev_reset(input_dev, false); + mutex_unlock(&input_dev->mutex); + + return 0; +} + +static int input_dev_resume(struct device *dev) +{ + struct input_dev *input_dev = to_input_dev(dev); + + mutex_lock(&input_dev->mutex); + input_dev_reset(input_dev, true); + mutex_unlock(&input_dev->mutex); + + return 0; +} + +static const struct dev_pm_ops input_dev_pm_ops = { + .suspend = input_dev_suspend, + .resume = input_dev_resume, + .poweroff = input_dev_suspend, + .restore = input_dev_resume, +}; +#endif /* CONFIG_PM */ + static struct device_type input_dev_type = { .groups = input_dev_attr_groups, .release = input_dev_release, .uevent = input_dev_uevent, +#ifdef CONFIG_PM + .pm = &input_dev_pm_ops, +#endif }; static char *input_nodename(struct device *dev) -- cgit v1.2.3 From e454cea20bdcff10ee698d11b8882662a0153a47 Mon Sep 17 00:00:00 2001 From: Kay Sievers Date: Fri, 18 Sep 2009 23:01:12 +0200 Subject: Driver-Core: extend devnode callbacks to provide permissions This allows subsytems to provide devtmpfs with non-default permissions for the device node. Instead of the default mode of 0600, null, zero, random, urandom, full, tty, ptmx now have a mode of 0666, which allows non-privileged processes to access standard device nodes in case no other userspace process applies the expected permissions. This also fixes a wrong assignment in pktcdvd and a checkpatch.pl complain. Signed-off-by: Kay Sievers Signed-off-by: Greg Kroah-Hartman --- drivers/input/input.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers/input/input.c') diff --git a/drivers/input/input.c b/drivers/input/input.c index 851791d955f3..556539d617a4 100644 --- a/drivers/input/input.c +++ b/drivers/input/input.c @@ -1265,14 +1265,14 @@ static struct device_type input_dev_type = { .uevent = input_dev_uevent, }; -static char *input_nodename(struct device *dev) +static char *input_devnode(struct device *dev, mode_t *mode) { return kasprintf(GFP_KERNEL, "input/%s", dev_name(dev)); } struct class input_class = { .name = "input", - .nodename = input_nodename, + .devnode = input_devnode, }; EXPORT_SYMBOL_GPL(input_class); -- cgit v1.2.3