forked from Minki/linux
ad8dc96e3b
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>
34 lines
698 B
Plaintext
34 lines
698 B
Plaintext
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);
|