gpio: ws16c48: 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 WinSystems WS16C48.
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, 18 insertions, 1 deletions

diff --git a/drivers/gpio/gpio-ws16c48.c b/drivers/gpio/gpio-ws16c48.c
index 48b35589b7d6..901b5ccb032d 100644
--- a/drivers/gpio/gpio-ws16c48.c
+++ b/drivers/gpio/gpio-ws16c48.c
@@ -341,6 +341,22 @@ static irqreturn_t ws16c48_irq_handler(int irq, void *dev_id)
         return IRQ_HANDLED;
 }
 
+#define WS16C48_NGPIO 48
+static const char *ws16c48_names[WS16C48_NGPIO] = {
+        "Port 0 Bit 0", "Port 0 Bit 1", "Port 0 Bit 2", "Port 0 Bit 3",
+        "Port 0 Bit 4", "Port 0 Bit 5", "Port 0 Bit 6", "Port 0 Bit 7",
+        "Port 1 Bit 0", "Port 1 Bit 1", "Port 1 Bit 2", "Port 1 Bit 3",
+        "Port 1 Bit 4", "Port 1 Bit 5", "Port 1 Bit 6", "Port 1 Bit 7",
+        "Port 2 Bit 0", "Port 2 Bit 1", "Port 2 Bit 2", "Port 2 Bit 3",
+        "Port 2 Bit 4", "Port 2 Bit 5", "Port 2 Bit 6", "Port 2 Bit 7",
+        "Port 3 Bit 0", "Port 3 Bit 1", "Port 3 Bit 2", "Port 3 Bit 3",
+        "Port 3 Bit 4", "Port 3 Bit 5", "Port 3 Bit 6", "Port 3 Bit 7",
+        "Port 4 Bit 0", "Port 4 Bit 1", "Port 4 Bit 2", "Port 4 Bit 3",
+        "Port 4 Bit 4", "Port 4 Bit 5", "Port 4 Bit 6", "Port 4 Bit 7",
+        "Port 5 Bit 0", "Port 5 Bit 1", "Port 5 Bit 2", "Port 5 Bit 3",
+        "Port 5 Bit 4", "Port 5 Bit 5", "Port 5 Bit 6", "Port 5 Bit 7"
+};
+
 static int ws16c48_probe(struct device *dev, unsigned int id)
 {
         struct ws16c48_gpio *ws16c48gpio;
@@ -361,7 +377,8 @@ static int ws16c48_probe(struct device *dev, unsigned int id)
         ws16c48gpio->chip.parent = dev;
         ws16c48gpio->chip.owner = THIS_MODULE;
         ws16c48gpio->chip.base = -1;
-        ws16c48gpio->chip.ngpio = 48;
+        ws16c48gpio->chip.ngpio = WS16C48_NGPIO;
+        ws16c48gpio->chip.names = ws16c48_names;
         ws16c48gpio->chip.get_direction = ws16c48_gpio_get_direction;
         ws16c48gpio->chip.direction_input = ws16c48_gpio_direction_input;
         ws16c48gpio->chip.direction_output = ws16c48_gpio_direction_output;