From: Ahmad Fatoum <a.fatoum@pengutronix.de>
To: barebox@lists.infradead.org
Subject: [PATCH 1/7] gpio: allow for arch-specific ARCH_NR_GPIOS > 256
Date: Wed, 10 Jul 2019 22:11:06 +0200 [thread overview]
Message-ID: <20190710201112.9086-1-a.fatoum@pengutronix.de> (raw)
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@pengutronix.de>
---
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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next reply other threads:[~2019-07-10 20:11 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-10 20:11 Ahmad Fatoum [this message]
2019-07-10 20:11 ` [PATCH 2/7] ARM: stm32mp: set CONFIG_ARCH_NR_GPIO = (26 * 16) Ahmad Fatoum
2019-07-10 20:11 ` [PATCH 3/7] ARM: dts: stm32mp157c: correct gpioz id Ahmad Fatoum
2019-07-10 20:11 ` [PATCH 4/7] reset: add reset controller driver for STM32 RCC Ahmad Fatoum
2019-07-10 21:28 ` [PATCH] fixup! " Ahmad Fatoum
2019-07-10 20:11 ` [PATCH 5/7] i2c: add stm32f7 I2C adapter driver Ahmad Fatoum
2019-07-12 5:09 ` Sascha Hauer
2019-07-10 20:11 ` [PATCH 6/7] mfd: add support for STPMIC1 Ahmad Fatoum
2019-07-10 20:11 ` [PATCH 7/7] watchdog: add support for STPMIC1 integrated watchdog Ahmad Fatoum
2019-07-15 6:42 ` [PATCH 1/7] gpio: allow for arch-specific ARCH_NR_GPIOS > 256 Sascha Hauer
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