1 files changed, 33 insertions, 0 deletions

diff --git a/Documentation/w1/masters/w1-gpio b/Documentation/w1/masters/w1-gpio
new file mode 100644
index 00000000000..af5d3b4aa85
--- /dev/null
+++ b/Documentation/w1/masters/w1-gpio
@@ -0,0 +1,33 @@
+Kernel driver w1-gpio
+=====================
+
+Author: Ville Syrjala <syrjala@sci.fi>
+
+
+Description
+-----------
+
+GPIO 1-wire bus master driver. The driver uses the GPIO API to control the
+wire and the GPIO pin can be specified using platform data.
+
+
+Example (mach-at91)
+-------------------
+
+#include <linux/w1-gpio.h>
+
+static struct w1_gpio_platform_data foo_w1_gpio_pdata = {
+        .pin            = AT91_PIN_PB20,
+        .is_open_drain  = 1,
+};
+
+static struct platform_device foo_w1_device = {
+        .name                   = "w1-gpio",
+        .id                     = -1,
+        .dev.platform_data      = &foo_w1_gpio_pdata,
+};
+
+...
+        at91_set_GPIO_periph(foo_w1_gpio_pdata.pin, 1);
+        at91_set_multi_drive(foo_w1_gpio_pdata.pin, 1);
+        platform_device_register(&foo_w1_device);