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| author | Jean-Francois Dagenais <jeff.dagenais@gmail.com> | 2014-02-12 15:14:28 -0800 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2014-02-15 13:13:17 -0800 |
| commit | 910a9f5636f5c128c02bf9ccd71ac03325700b57 (patch) | |
| tree | 9826ada0e6b80bb99e17ab280d45d2e00ecd0008 /drivers | |
| parent | 55df811f2066fcaec2548248f0a1a6a0c12dc6b8 (diff) | |
| download | linux-stable-910a9f5636f5c128c02bf9ccd71ac03325700b57.tar.gz linux-stable-910a9f5636f5c128c02bf9ccd71ac03325700b57.tar.bz2 linux-stable-910a9f5636f5c128c02bf9ccd71ac03325700b57.zip | |
Input: adp5588-keys - get value from data out when dir is out
As discussed here: http://ez.analog.com/message/35852, the 5587 revC and
5588 revB spec sheets contain a mistake in the GPIO_DAT_STATx register
description.
According to R.Shnell at ADI, as well as my own observations, it should
read: "GPIO data status (shows GPIO state when read for inputs)".
This commit changes the get value function accordingly.
Signed-off-by: Jean-Francois Dagenais <jeff.dagenais@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/input/keyboard/adp5588-keys.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/drivers/input/keyboard/adp5588-keys.c b/drivers/input/keyboard/adp5588-keys.c index bb3b57bea8ba..5ef7fcf0e250 100644 --- a/drivers/input/keyboard/adp5588-keys.c +++ b/drivers/input/keyboard/adp5588-keys.c @@ -76,8 +76,18 @@ static int adp5588_gpio_get_value(struct gpio_chip *chip, unsigned off) struct adp5588_kpad *kpad = container_of(chip, struct adp5588_kpad, gc); unsigned int bank = ADP5588_BANK(kpad->gpiomap[off]); unsigned int bit = ADP5588_BIT(kpad->gpiomap[off]); + int val; - return !!(adp5588_read(kpad->client, GPIO_DAT_STAT1 + bank) & bit); + mutex_lock(&kpad->gpio_lock); + + if (kpad->dir[bank] & bit) + val = kpad->dat_out[bank]; + else + val = adp5588_read(kpad->client, GPIO_DAT_STAT1 + bank); + + mutex_unlock(&kpad->gpio_lock); + + return !!(val & bit); } static void adp5588_gpio_set_value(struct gpio_chip *chip, |