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Input: imx_keypad - only set enabled columns to open-drain 

In imx_keypad_inhibit(), all 8 columns were set to open-drain, in
contrast to the rest of the driver, where only the enabled columns
are modified/used.

Contrary to the normal expectation, this also affects column I/Os not
even mapped via IOMUX to the KPP hardware module but used as a GPIO.
Therefore only init enabled columns to open-drain and leave all others
with their default reset value of 0, i.e. totem-pole.

Signed-off-by: Andreas Pretzsch <apr@cn-eng.de>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Andreas Pretzsch 2012-11-24 23:31:38 -08:00 committed by Dmitry Torokhov
parent 52ad48a0ce
commit 92aab96034
1 changed files with 2 additions and 1 deletions
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3
drivers/input/keyboard/imx_keypad.c
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@ -362,7 +362,8 @@ static void imx_keypad_inhibit(struct imx_keypad *keypad)
writew(reg_val, keypad->mmio_base + KPSR);
/* Colums as open drain and disable all rows */
writew(0xff00, keypad->mmio_base + KPCR);
reg_val = (keypad->cols_en_mask & 0xff) << 8;
writew(reg_val, keypad->mmio_base + KPCR);
}
static void imx_keypad_close(struct input_dev *dev)