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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>
33 lines
698 B
Text
33 lines
698 B
Text
Kernel driver w1-gpio
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=====================
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Author: Ville Syrjala <syrjala@sci.fi>
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Description
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-----------
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GPIO 1-wire bus master driver. The driver uses the GPIO API to control the
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wire and the GPIO pin can be specified using platform data.
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Example (mach-at91)
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-------------------
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#include <linux/w1-gpio.h>
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static struct w1_gpio_platform_data foo_w1_gpio_pdata = {
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.pin = AT91_PIN_PB20,
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.is_open_drain = 1,
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};
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static struct platform_device foo_w1_device = {
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.name = "w1-gpio",
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.id = -1,
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.dev.platform_data = &foo_w1_gpio_pdata,
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};
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...
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at91_set_GPIO_periph(foo_w1_gpio_pdata.pin, 1);
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at91_set_multi_drive(foo_w1_gpio_pdata.pin, 1);
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platform_device_register(&foo_w1_device);
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