cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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w1-gpio.rst (1132B)

      1=====================
      2Kernel driver w1-gpio
      3=====================
      4
      5Author: Ville Syrjala <syrjala@sci.fi>
      6
      7
      8Description
      9-----------
     10
     11GPIO 1-wire bus master driver. The driver uses the GPIO API to control the
     12wire and the GPIO pin can be specified using GPIO machine descriptor tables.
     13It is also possible to define the master using device tree, see
     14Documentation/devicetree/bindings/w1/w1-gpio.yaml
     15
     16
     17Example (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_gpiod_table = {
     26	.dev_id = "w1-gpio",
     27	.table = {
     28		GPIO_LOOKUP_IDX("at91-gpio", AT91_PIN_PB20, NULL, 0,
     29			GPIO_ACTIVE_HIGH|GPIO_OPEN_DRAIN),
     30	},
     31  };
     32
     33  static struct w1_gpio_platform_data foo_w1_gpio_pdata = {
     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_pdata,
     41  };
     42
     43  ...
     44	at91_set_GPIO_periph(foo_w1_gpio_pdata.pin, 1);
     45	at91_set_multi_drive(foo_w1_gpio_pdata.pin, 1);
     46	gpiod_add_lookup_table(&foo_w1_gpiod_table);
     47	platform_device_register(&foo_w1_device);