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| author | Andreas Pretzsch <apr@cn-eng.de> | 2012-11-24 23:31:38 -0800 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2012-11-25 00:10:18 -0800 |
| commit | 92aab96034c2cdf11eb61a6b14409c2da8e5158d (patch) | |
| tree | 95c67864b67db9eb9a081b371e12c0a36a053313 /drivers/input | |
| parent | 52ad48a0ce25d4d44ce82b7e28a35eb69598e5f1 (diff) | |
| download | blackbird-op-linux-92aab96034c2cdf11eb61a6b14409c2da8e5158d.tar.gz blackbird-op-linux-92aab96034c2cdf11eb61a6b14409c2da8e5158d.zip | |
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>
Diffstat (limited to 'drivers/input')
| -rw-r--r-- | drivers/input/keyboard/imx_keypad.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/input/keyboard/imx_keypad.c b/drivers/input/keyboard/imx_keypad.c index 7ad74517654b..6d150e3e1f55 100644 --- a/drivers/input/keyboard/imx_keypad.c +++ b/drivers/input/keyboard/imx_keypad.c @@ -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) |
