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| author | Evgeniy Dushistov <dushistov@mail.ru> | 2015-05-15 23:47:46 +0300 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2015-05-16 01:58:39 +0300 |
| commit | ee3514b2256ef6aaa3b9f353af88d831dd596d09 (patch) | |
| tree | 5ddd63cddb56bbea4c1c10660562ca00a95a979c /drivers/input/keyboard/max7359_keypad.c | |
| parent | 67367fd259f26d15e7e3ec15d0d8b8ab5601bbbb (diff) | |
| download | linux-ee3514b2256ef6aaa3b9f353af88d831dd596d09.tar.xz | |
Input: max7359_keypad - do not set MAX7359_CFG_INTERRUPT flag
In datasheet of max7359 there is the following description of this flag:
0 - INT cleared when FIFO empty,
1 - INT cleared after host read. In this mode, I2C should read
FIFO until interrupt condition removed, or further INT may be lost.
So, if we set this flag, we have to read FIFO until it becomes empty. But
in interrupt we read FIFO just once. This lead to "keyboard" hang until
reboot, if we press several keys, because of interrupt handler read just
one "press" from FIFO and clear interrupt.
Signed-off-by: Evgeniy A. Dushistov <dushistov@mail.ru>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'drivers/input/keyboard/max7359_keypad.c')
| -rw-r--r-- | drivers/input/keyboard/max7359_keypad.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/drivers/input/keyboard/max7359_keypad.c b/drivers/input/keyboard/max7359_keypad.c index faa6da53eba8..4e35904d65ad 100644 --- a/drivers/input/keyboard/max7359_keypad.c +++ b/drivers/input/keyboard/max7359_keypad.c @@ -166,7 +166,6 @@ static void max7359_close(struct input_dev *dev) static void max7359_initialize(struct i2c_client *client) { max7359_write_reg(client, MAX7359_REG_CONFIG, - MAX7359_CFG_INTERRUPT | /* Irq clears after host read */ MAX7359_CFG_KEY_RELEASE | /* Key release enable */ MAX7359_CFG_WAKEUP); /* Key press wakeup enable */ |