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authorEric Miao <eric.y.miao@gmail.com>2010-02-05 04:13:55 +0300
committerEric Miao <eric.y.miao@gmail.com>2010-03-02 02:40:49 +0300
commitda8065ac3ea29d1bfdb5a163be346fbe35066f8d (patch)
tree5b861839c7b61cd29eb5b04f9c68d2d040f72a1e /drivers/input
parentefe7f8bda015b03ab1420b5bca538d18e6559863 (diff)
downloadlinux-da8065ac3ea29d1bfdb5a163be346fbe35066f8d.tar.xz
[ARM] locomo: avoid unnecessary cascaded keyboard IRQ
It is not necessary and is over-complicated for IRQ_LOCOMO_KEY to be a cascaded IRQ of IRQ_LOCOMO_KEY_BASE. Removed and introduced locomokbd_{open,close} for masking/unmasking of the keyboard IRQ. Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
Diffstat (limited to 'drivers/input')
-rw-r--r--drivers/input/keyboard/locomokbd.c32
1 files changed, 31 insertions, 1 deletions
diff --git a/drivers/input/keyboard/locomokbd.c b/drivers/input/keyboard/locomokbd.c
index 9caed30f3bbb..b1ab29861e1c 100644
--- a/drivers/input/keyboard/locomokbd.c
+++ b/drivers/input/keyboard/locomokbd.c
@@ -192,11 +192,18 @@ static void locomokbd_scankeyboard(struct locomokbd *locomokbd)
static irqreturn_t locomokbd_interrupt(int irq, void *dev_id)
{
struct locomokbd *locomokbd = dev_id;
+ u16 r;
+
+ r = locomo_readl(locomokbd->base + LOCOMO_KIC);
+ if ((r & 0x0001) == 0)
+ return IRQ_HANDLED;
+
+ locomo_writel(r & ~0x0100, locomokbd->base + LOCOMO_KIC); /* Ack */
+
/** wait chattering delay **/
udelay(100);
locomokbd_scankeyboard(locomokbd);
-
return IRQ_HANDLED;
}
@@ -210,6 +217,25 @@ static void locomokbd_timer_callback(unsigned long data)
locomokbd_scankeyboard(locomokbd);
}
+static int locomokbd_open(struct input_dev *dev)
+{
+ struct locomokbd *locomokbd = input_get_drvdata(dev);
+ u16 r;
+
+ r = locomo_readl(locomokbd->base + LOCOMO_KIC) | 0x0010;
+ locomo_writel(r, locomokbd->base + LOCOMO_KIC);
+ return 0;
+}
+
+static void locomokbd_close(struct input_dev *dev)
+{
+ struct locomokbd *locomokbd = input_get_drvdata(dev);
+ u16 r;
+
+ r = locomo_readl(locomokbd->base + LOCOMO_KIC) & ~0x0010;
+ locomo_writel(r, locomokbd->base + LOCOMO_KIC);
+}
+
static int __devinit locomokbd_probe(struct locomo_dev *dev)
{
struct locomokbd *locomokbd;
@@ -253,6 +279,8 @@ static int __devinit locomokbd_probe(struct locomo_dev *dev)
input_dev->id.vendor = 0x0001;
input_dev->id.product = 0x0001;
input_dev->id.version = 0x0100;
+ input_dev->open = locomokbd_open;
+ input_dev->close = locomokbd_close;
input_dev->dev.parent = &dev->dev;
input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP) |
@@ -261,6 +289,8 @@ static int __devinit locomokbd_probe(struct locomo_dev *dev)
input_dev->keycodesize = sizeof(locomokbd_keycode[0]);
input_dev->keycodemax = ARRAY_SIZE(locomokbd_keycode);
+ input_set_drvdata(input_dev, locomokbd);
+
memcpy(locomokbd->keycode, locomokbd_keycode, sizeof(locomokbd->keycode));
for (i = 0; i < LOCOMOKBD_NUMKEYS; i++)
set_bit(locomokbd->keycode[i], input_dev->keybit);