gpio: 74x164: Use dynamic gpio number assignment if no pdata is present

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Florian Fainelli <florian@openwrt.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

1 files changed, 6 insertions, 7 deletions

diff --git a/drivers/gpio/gpio-74x164.c b/drivers/gpio/gpio-74x164.c
index 604b998b7b74..ef8baacb650a 100644
--- a/drivers/gpio/gpio-74x164.c
+++ b/drivers/gpio/gpio-74x164.c
@@ -75,12 +75,6 @@ static int __devinit gen_74x164_probe(struct spi_device *spi)
         struct gen_74x164_chip_platform_data *pdata;
         int ret;
 
-        pdata = spi->dev.platform_data;
-        if (!pdata || !pdata->base) {
-                dev_dbg(&spi->dev, "incorrect or missing platform data\n");
-                return -EINVAL;
-        }
-
         /*
          * bits_per_word cannot be configured in platform data
          */
@@ -94,6 +88,12 @@ static int __devinit gen_74x164_probe(struct spi_device *spi)
         if (!chip)
                 return -ENOMEM;
 
+        pdata = spi->dev.platform_data;
+        if (pdata && pdata->base)
+                chip->gpio_chip.base = pdata->base;
+        else
+                chip->gpio_chip.base = -1;
+
         mutex_init(&chip->lock);
 
         dev_set_drvdata(&spi->dev, chip);
@@ -104,7 +104,6 @@ static int __devinit gen_74x164_probe(struct spi_device *spi)
         chip->gpio_chip.direction_output = gen_74x164_direction_output;
         chip->gpio_chip.get = gen_74x164_get_value;
         chip->gpio_chip.set = gen_74x164_set_value;
-        chip->gpio_chip.base = pdata->base;
         chip->gpio_chip.ngpio = 8;
         chip->gpio_chip.can_sleep = 1;
         chip->gpio_chip.dev = &spi->dev;