[PATCH v2] gpio/samsung: Complain loudly if we don't know the SoC

[Mark Brown <broonie@opensource.wolfsonmicro.com>]

If we don't know the SoC type then we won't add any chips which is rather
unfortunate as neither GPIO nor pinmux APIs will work, breaking lots of
different subsystems. Logging at least provides a hint to the user as to
what's gone wrong.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
---
 drivers/gpio/gpio-samsung.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/drivers/gpio/gpio-samsung.c b/drivers/gpio/gpio-samsung.c
index 479edc3..8662518 100644
--- a/drivers/gpio/gpio-samsung.c
+++ b/drivers/gpio/gpio-samsung.c
@@ -2486,6 +2486,9 @@ static __init int samsung_gpiolib_init(void)
 		s5p_register_gpioint_bank(IRQ_GPIO_XA, 0, IRQ_GPIO1_NR_GROUPS);
 		s5p_register_gpioint_bank(IRQ_GPIO_XB, IRQ_GPIO1_NR_GROUPS, IRQ_GPIO2_NR_GROUPS);
 #endif
+	} else {
+		WARN(1, "Unknown SoC in gpio-samsung, no GPIOs added\n");
+		return -ENODEV;
 	}
 
 	return 0;
-- 
1.7.6.3