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authorVille Syrjala <syrjala@sci.fi>2008-02-06 01:39:01 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2008-02-06 10:41:15 -0800
commitad8dc96e3b2c3e28854e0de4ab49351ed547b30c (patch)
tree6faab05e76206f130333ccff4c080600ed00d332 /include
parent4cdf854f7d60498bbda436068a118b95059b244b (diff)
w1-gpio: add GPIO w1 bus master driver
Add a GPIO 1-wire bus master driver. The driver used the GPIO API to control the wire and the GPIO pin can be specified using platform data similar to i2c-gpio. The driver was tested with AT91SAM9260 + DS2401. Signed-off-by: Ville Syrjala <syrjala@sci.fi> Cc: Evgeniy Polyakov <johnpol@2ka.mipt.ru> Cc: David Brownell <david-b@pacbell.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/w1-gpio.h23
1 files changed, 23 insertions, 0 deletions
diff --git a/include/linux/w1-gpio.h b/include/linux/w1-gpio.h
new file mode 100644
index 00000000000..9797fec7748
--- /dev/null
+++ b/include/linux/w1-gpio.h
@@ -0,0 +1,23 @@
+/*
+ * w1-gpio interface to platform code
+ *
+ * Copyright (C) 2007 Ville Syrjala <syrjala@sci.fi>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ */
+#ifndef _LINUX_W1_GPIO_H
+#define _LINUX_W1_GPIO_H
+
+/**
+ * struct w1_gpio_platform_data - Platform-dependent data for w1-gpio
+ * @pin: GPIO pin to use
+ * @is_open_drain: GPIO pin is configured as open drain
+ */
+struct w1_gpio_platform_data {
+ unsigned int pin;
+ unsigned int is_open_drain:1;
+};
+
+#endif /* _LINUX_W1_GPIO_H */