[PATCH 2/2] input: adp5588-keys: get value from data out when dir is out
From: Jean-Francois Dagenais <hidden>
Date: 2014-02-10 17:05:29
Also in:
linux-gpio
Subsystem:
adp5588 qwerty keypad and io expander driver (adp5588/adp5587), input (keyboard, mouse, joystick, touchscreen) drivers, the rest · Maintainers:
Michael Hennerich, Dmitry Torokhov, Linus Torvalds
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 <redacted> --- drivers/input/keyboard/adp5588-keys.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-)
diff --git a/drivers/input/keyboard/adp5588-keys.c b/drivers/input/keyboard/adp5588-keys.c
index bb3b57b..5ef7fcf 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,
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1.8.5.3