1 =====================
2 Kernel driver w1-gpio
3 =====================
4
5 Author: Ville Syrjala <syrjala@sci.fi>
6
7
8 Description
9 -----------
10
11 GPIO 1-wire bus master driver. The driver uses
12 wire and the GPIO pin can be specified using G
13 It is also possible to define the master using
14 Documentation/devicetree/bindings/w1/w1-gpio.y
15
16
17 Example (mach-at91)
18 -------------------
19
20 ::
21
22 #include <linux/gpio/machine.h>
23 #include <linux/w1-gpio.h>
24
25 static struct gpiod_lookup_table foo_w1_gpio
26 .dev_id = "w1-gpio",
27 .table = {
28 GPIO_LOOKUP_IDX("at91-gpio", A
29 GPIO_ACTIVE_HIGH|GPIO_
30 },
31 };
32
33 static struct w1_gpio_platform_data foo_w1_g
34 .ext_pullup_enable_pin = -EINVAL,
35 };
36
37 static struct platform_device foo_w1_device
38 .name = "w1-gpio",
39 .id = -1,
40 .dev.platform_data = &foo_w1_gpio
41 };
42
43 ...
44 at91_set_GPIO_periph(foo_w1_gpio_pdata
45 at91_set_multi_drive(foo_w1_gpio_pdata
46 gpiod_add_lookup_table(&foo_w1_gpiod_t
47 platform_device_register(&foo_w1_devic
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