From: Antony Pavlov <antonynpavlov@gmail.com>
To: barebox@lists.infradead.org
Subject: [PATCH 2/4] gpiolib: add gpio_request_{in,out}put support
Date: Thu, 31 Jan 2013 23:29:25 +0400 [thread overview]
Message-ID: <1359660567-12220-3-git-send-email-antonynpavlov@gmail.com> (raw)
In-Reply-To: <1359660567-12220-1-git-send-email-antonynpavlov@gmail.com>
gpio_request() followed by gpio_direction_{in,out}put
is a gpio usage pattern (e.g. the similar functions
are used in a ARM boards code).
Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
---
drivers/gpio/gpio.c | 26 ++++++++++++++++++++++++++
include/gpio.h | 13 +++++++++++++
2 files changed, 39 insertions(+)
diff --git a/drivers/gpio/gpio.c b/drivers/gpio/gpio.c
index d37f5a0..f32f304 100644
--- a/drivers/gpio/gpio.c
+++ b/drivers/gpio/gpio.c
@@ -47,6 +47,32 @@ int gpio_request(unsigned gpio, const char *label)
return 0;
}
+int gpio_request_input(unsigned gpio, const char *label)
+{
+ int ret;
+
+ ret = gpio_request(gpio, label);
+ if (ret)
+ return ret;
+
+ ret = gpio_direction_input(gpio);
+
+ return ret;
+}
+
+int gpio_request_output(unsigned gpio, const char *label, int value)
+{
+ int ret;
+
+ ret = gpio_request(gpio, label);
+ if (ret)
+ return ret;
+
+ ret = gpio_direction_output(gpio, value);
+
+ return ret;
+}
+
void gpio_free(unsigned gpio)
{
struct gpio_info *gi = &gpio_desc[gpio];
diff --git a/include/gpio.h b/include/gpio.h
index 794d959..309c1c5 100644
--- a/include/gpio.h
+++ b/include/gpio.h
@@ -9,11 +9,24 @@ static inline int gpio_request(unsigned gpio, const char *label)
return 0;
}
+static inline int gpio_request_input(unsigned gpio, const char *label)
+{
+ return 0;
+}
+
+static inline int gpio_request_output(unsigned gpio, const char *label,
+ int value)
+{
+ return 0;
+}
+
static inline void gpio_free(unsigned gpio)
{
}
#else
int gpio_request(unsigned gpio, const char *label);
+int gpio_request_input(unsigned gpio, const char *label);
+int gpio_request_output(unsigned gpio, const char *label, int value);
void gpio_free(unsigned gpio);
#endif
--
1.7.10.4
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next prev parent reply other threads:[~2013-01-31 19:17 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-31 19:29 [PATCH 0/4] " Antony Pavlov
2013-01-31 19:29 ` [PATCH 1/4] gpiolib: fix whitespaces Antony Pavlov
2013-01-31 19:29 ` Antony Pavlov [this message]
2013-01-31 19:29 ` [PATCH 3/4] at91sam9*: use gpio_request_output() Antony Pavlov
2013-01-31 19:33 ` Jean-Christophe PLAGNIOL-VILLARD
2013-01-31 19:29 ` [PATCH 4/4] animeo_ip: use gpio_request_input() Antony Pavlov
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