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authorJean-Francois Dagenais <jeff.dagenais@gmail.com>2014-02-12 15:14:28 -0800
committerDmitry Torokhov <dmitry.torokhov@gmail.com>2014-02-15 13:13:17 -0800
commit910a9f5636f5c128c02bf9ccd71ac03325700b57 (patch)
tree9826ada0e6b80bb99e17ab280d45d2e00ecd0008 /drivers/input
parent55df811f2066fcaec2548248f0a1a6a0c12dc6b8 (diff)
downloadlinux-910a9f5636f5c128c02bf9ccd71ac03325700b57.tar.bz2
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/input')
-rw-r--r--drivers/input/keyboard/adp5588-keys.c12
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,