Some architectures have non-contiguous GPIO ranges where some GPIOs can
have identifiers exceeding the hardcoded ARCH_NR_GPIOs of 256.
One such example is the STM32MP, whose gpioz controller has identifiers
that go up to ('Z' - 'A' + 1) * 0x10 - 1 = 415.
Instead of increasing the array size for all architectures or doing
some sort of packing, allow architecture to define their own overriding
CONFIG_ARCH_NR_GPIO like the kernel does.
Signed-off-by: Ahmad Fatoum <a.fatoum@xxxxxxxxxxxxxx>
---
include/gpio.h | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/include/gpio.h b/include/gpio.h
index e822fd53475d..1926edeca757 100644
--- a/include/gpio.h
+++ b/include/gpio.h
@@ -45,7 +45,11 @@ static inline int gpio_direction_active(unsigned gpio, int value)
}
#endif
+#if defined(CONFIG_ARCH_NR_GPIO) && CONFIG_ARCH_NR_GPIO > 0
+#define ARCH_NR_GPIOS CONFIG_ARCH_NR_GPIO
+#else
#define ARCH_NR_GPIOS 256
+#endif
static inline int gpio_is_valid(int gpio)
{
--
2.20.1
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