gpio: 104-dio-48e: 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-DIO-48E.
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>

1 files changed, 22 insertions, 1 deletions

diff --git a/drivers/gpio/gpio-104-dio-48e.c b/drivers/gpio/gpio-104-dio-48e.c
index b6b0378166c4..17bd2ab4ebe2 100644
--- a/drivers/gpio/gpio-104-dio-48e.c
+++ b/drivers/gpio/gpio-104-dio-48e.c
@@ -338,6 +338,26 @@ static irqreturn_t dio48e_irq_handler(int irq, void *dev_id)
         return IRQ_HANDLED;
 }
 
+#define DIO48E_NGPIO 48
+static const char *dio48e_names[DIO48E_NGPIO] = {
+        "PPI Group 0 Port A 0", "PPI Group 0 Port A 1", "PPI Group 0 Port A 2",
+        "PPI Group 0 Port A 3", "PPI Group 0 Port A 4", "PPI Group 0 Port A 5",
+        "PPI Group 0 Port A 6", "PPI Group 0 Port A 7", "PPI Group 0 Port B 0",
+        "PPI Group 0 Port B 1", "PPI Group 0 Port B 2", "PPI Group 0 Port B 3",
+        "PPI Group 0 Port B 4", "PPI Group 0 Port B 5", "PPI Group 0 Port B 6",
+        "PPI Group 0 Port B 7", "PPI Group 0 Port C 0", "PPI Group 0 Port C 1",
+        "PPI Group 0 Port C 2", "PPI Group 0 Port C 3", "PPI Group 0 Port C 4",
+        "PPI Group 0 Port C 5", "PPI Group 0 Port C 6", "PPI Group 0 Port C 7",
+        "PPI Group 1 Port A 0", "PPI Group 1 Port A 1", "PPI Group 1 Port A 2",
+        "PPI Group 1 Port A 3", "PPI Group 1 Port A 4", "PPI Group 1 Port A 5",
+        "PPI Group 1 Port A 6", "PPI Group 1 Port A 7", "PPI Group 1 Port B 0",
+        "PPI Group 1 Port B 1", "PPI Group 1 Port B 2", "PPI Group 1 Port B 3",
+        "PPI Group 1 Port B 4", "PPI Group 1 Port B 5", "PPI Group 1 Port B 6",
+        "PPI Group 1 Port B 7", "PPI Group 1 Port C 0", "PPI Group 1 Port C 1",
+        "PPI Group 1 Port C 2", "PPI Group 1 Port C 3", "PPI Group 1 Port C 4",
+        "PPI Group 1 Port C 5", "PPI Group 1 Port C 6", "PPI Group 1 Port C 7"
+};
+
 static int dio48e_probe(struct device *dev, unsigned int id)
 {
         struct dio48e_gpio *dio48egpio;
@@ -358,7 +378,8 @@ static int dio48e_probe(struct device *dev, unsigned int id)
         dio48egpio->chip.parent = dev;
         dio48egpio->chip.owner = THIS_MODULE;
         dio48egpio->chip.base = -1;
-        dio48egpio->chip.ngpio = 48;
+        dio48egpio->chip.ngpio = DIO48E_NGPIO;
+        dio48egpio->chip.names = dio48e_names;
         dio48egpio->chip.get_direction = dio48e_gpio_get_direction;
         dio48egpio->chip.direction_input = dio48e_gpio_direction_input;
         dio48egpio->chip.direction_output = dio48e_gpio_direction_output;