lkml.org 
[lkml]   [2008]   [Oct]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[PATCH 4/7] gpiolib: implement dev_gpiochip_{add,remove} calls
Any GPIO controller that have a device associated with it is encouraged to
register/unregister the gpiochips with dev_gpiochip_*() calls.

Platform may redefine these calls to glue the gpiochips with the
architecture-specific code.

Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com>
---
include/asm-generic/gpio.h | 44 ++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 44 insertions(+), 0 deletions(-)

diff --git a/include/asm-generic/gpio.h b/include/asm-generic/gpio.h
index 0f99ad3..f31c7ae 100644
--- a/include/asm-generic/gpio.h
+++ b/include/asm-generic/gpio.h
@@ -89,6 +89,50 @@ extern int __must_check gpiochip_reserve(int start, int ngpio);
extern int gpiochip_add(struct gpio_chip *chip);
extern int __must_check gpiochip_remove(struct gpio_chip *chip);

+/*
+ * Platforms can define their own __dev_ versions to glue gpio_chips with the
+ * architecture-specific code.
+ */
+#ifndef __dev_gpiochip_add
+#define __dev_gpiochip_add __dev_gpiochip_add
+static inline int __dev_gpiochip_add(struct device *dev,
+ struct gpio_chip *chip)
+{
+ chip->dev = dev;
+ return gpiochip_add(chip);
+}
+#endif /* __dev_gpiochip_add */
+
+#ifndef __dev_gpiochip_remove
+#define __dev_gpiochip_remove __dev_gpiochip_remove
+static inline int __dev_gpiochip_remove(struct device *dev,
+ struct gpio_chip *chip)
+{
+ return gpiochip_remove(chip);
+}
+#endif /* __dev_gpiochip_remove */
+
+/**
+ * dev_gpiochip_add - register a gpio_chip for a device
+ * @dev: device to register gpio_chip for
+ * @chip: the chip to register
+ * Context: potentially before irqs or kmalloc will work
+ *
+ * This function takes the extra @dev argument that is used to associate
+ * the chip with a device. Otherwise it behaves the same way as the
+ * gpiochip_add().
+ */
+#define dev_gpiochip_add(dev, chip) __dev_gpiochip_add((dev), (chip))
+
+/**
+ * dev_gpiochip_remove - unregister a gpio_chip
+ * @dev: device to remove the chip from
+ * @chip: the chip to unregister
+ *
+ * Use this function to unregister the chip that was registered using
+ * dev_gpiochip_add().
+ */
+#define dev_gpiochip_remove(dev, chip) __dev_gpiochip_remove((dev), (chip))

/* Always use the library code for GPIO management calls,
* or when sleeping may be involved.
--
1.5.6.3


\
 
 \ /
  Last update: 2008-10-16 19:17    [W:0.107 / U:0.304 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site