[PATCH 1/2] gpio: adp5588: get value from data out when dir is out
From: Jean-Francois Dagenais <hidden>
Date: 2014-02-10 17:05:28
Also in:
linux-input
Subsystem:
gpio subsystem, the rest · Maintainers:
Linus Walleij, Bartosz Golaszewski, 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/gpio/gpio-adp5588.c | 15 +++++++++++++-- 1 file changed, 13 insertions(+), 2 deletions(-)
diff --git a/drivers/gpio/gpio-adp5588.c b/drivers/gpio/gpio-adp5588.c
index 3f190e6..7d3c8d9 100644
--- a/drivers/gpio/gpio-adp5588.c
+++ b/drivers/gpio/gpio-adp5588.c@@ -67,9 +67,20 @@ static int adp5588_gpio_get_value(struct gpio_chip *chip, unsigned off) { struct adp5588_gpio *dev = container_of(chip, struct adp5588_gpio, gpio_chip); + unsigned bank = ADP5588_BANK(off); + unsigned bit = ADP5588_BIT(off); + int val; - return !!(adp5588_gpio_read(dev->client, - GPIO_DAT_STAT1 + ADP5588_BANK(off)) & ADP5588_BIT(off)); + mutex_lock(&dev->lock); + + if (dev->dir[bank] & bit) + val = dev->dat_out[bank]; + else + val = adp5588_gpio_read(dev->client, GPIO_DAT_STAT1 + bank); + + mutex_unlock(&dev->lock); + + return !!(val & bit); } static void adp5588_gpio_set_value(struct gpio_chip *chip,
--
1.8.5.3