sh-pfc: Make GPIO support optional

When implemented as a separate IP block, GPIOs should be handled by a
separate driver. To make this possible GPIO support needs to be optional
in the sh-pfc driver.

If no GPIO data registers are supplied in the SoC information structure
skip registration of the gpiochip.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/pinctrl/sh-pfc/gpio.c b/drivers/pinctrl/sh-pfc/gpio.c
index 7a54ec79518b..317cebb0ee4d 100644
--- a/drivers/pinctrl/sh-pfc/gpio.c
+++ b/drivers/pinctrl/sh-pfc/gpio.c
@@ -354,6 +354,9 @@ int sh_pfc_register_gpiochip(struct sh_pfc *pfc)
         unsigned int i;
         int ret;
 
+        if (pfc->info->data_regs == NULL)
+                return 0;
+
         /* Register the real GPIOs chip. */
         chip = sh_pfc_add_gpiochip(pfc, gpio_pin_setup);
         if (IS_ERR(chip))