gpio: 104-idio-16: Add support for GPIO names

This patch sets the gpio_chip names option with an array of GPIO line
names that match the manual documentation for the ACCES 104-IDIO-16.
This should make it easier for users to identify which GPIO line
corresponds to a respective GPIO pin on the device.

Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

diff --git a/drivers/gpio/gpio-104-idio-16.c b/drivers/gpio/gpio-104-idio-16.c
index 67068b61b90ba24d78d9f186c87def06e0ef885a..7053cf7366488b8516896aa7365db1d8c3549db7 100644 (file)
--- a/drivers/gpio/gpio-104-idio-16.c
+++ b/drivers/gpio/gpio-104-idio-16.c
@@ -210,6 +210,14 @@ static irqreturn_t idio_16_irq_handler(int irq, void *dev_id)
        return IRQ_HANDLED;
 }
 
+#define IDIO_16_NGPIO 32
+static const char *idio_16_names[IDIO_16_NGPIO] = {
+       "OUT0", "OUT1", "OUT2", "OUT3", "OUT4", "OUT5", "OUT6", "OUT7",
+       "OUT8", "OUT9", "OUT10", "OUT11", "OUT12", "OUT13", "OUT14", "OUT15",
+       "IIN0", "IIN1", "IIN2", "IIN3", "IIN4", "IIN5", "IIN6", "IIN7",
+       "IIN8", "IIN9", "IIN10", "IIN11", "IIN12", "IIN13", "IIN14", "IIN15"
+};
+
 static int idio_16_probe(struct device *dev, unsigned int id)
 {
        struct idio_16_gpio *idio16gpio;
@@ -230,7 +238,8 @@ static int idio_16_probe(struct device *dev, unsigned int id)
        idio16gpio->chip.parent = dev;
        idio16gpio->chip.owner = THIS_MODULE;
        idio16gpio->chip.base = -1;
-       idio16gpio->chip.ngpio = 32;
+       idio16gpio->chip.ngpio = IDIO_16_NGPIO;
+       idio16gpio->chip.names = idio_16_names;
        idio16gpio->chip.get_direction = idio_16_gpio_get_direction;
        idio16gpio->chip.direction_input = idio_16_gpio_direction_input;
        idio16gpio->chip.direction_output = idio_16_gpio_direction_output;