diff options
| author |   Linus Walleij <linus.walleij@linaro.org> | 2016-11-12 14:36:17 +0100 |
|---|---|---|
| committer | Linus Walleij <linus.walleij@linaro.org> | 2016-11-12 14:36:17 +0100 |
| commit | 9298539c0472c1bd7516c62d444e561493e3f26c (patch) | |
| tree | 44af6fd71702f3f65936c5a4a591a5eb28fc8ece /drivers/gpio/gpio-htc-egpio.c | |
| parent | ACPI / gpio: avoid warning for gpio hogging code (diff) | |
| download | linux-dev-9298539c0472c1bd7516c62d444e561493e3f26c.tar.xz linux-dev-9298539c0472c1bd7516c62d444e561493e3f26c.zip | |
gpio: htc-egpio: add .get_direction() support
This makes is possible to read out the current direction of a
GPIO line on the HTC CPLD GPIO expander.
Suggested-by: Russell King <linux@arm.linux.org.uk>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'drivers/gpio/gpio-htc-egpio.c')
| -rw-r--r-- | drivers/gpio/gpio-htc-egpio.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/gpio/gpio-htc-egpio.c b/drivers/gpio/gpio-htc-egpio.c index 5ab895b41819..27af52850927 100644 --- a/drivers/gpio/gpio-htc-egpio.c +++ b/drivers/gpio/gpio-htc-egpio.c @@ -225,6 +225,15 @@ static int egpio_direction_output(struct gpio_chip *chip, } } +static int egpio_get_direction(struct gpio_chip *chip, unsigned offset) +{ + struct egpio_chip *egpio; + + egpio = gpiochip_get_data(chip); + + return !test_bit(offset, &egpio->is_out); +} + static void egpio_write_cache(struct egpio_info *ei) { int i; @@ -327,6 +336,7 @@ static int __init egpio_probe(struct platform_device *pdev) chip->set = egpio_set; chip->direction_input = egpio_direction_input; chip->direction_output = egpio_direction_output; + chip->get_direction = egpio_get_direction; chip->base = pdata->chip[i].gpio_base; chip->ngpio = pdata->chip[i].num_gpios; |