--- /dev/null
+Index: linux-2.6.24.5/drivers/w1/masters/Kconfig
+===================================================================
+--- linux-2.6.24.5.orig/drivers/w1/masters/Kconfig
++++ linux-2.6.24.5/drivers/w1/masters/Kconfig
+@@ -42,5 +42,15 @@ config W1_MASTER_DS1WM
+ in HP iPAQ devices like h5xxx, h2200, and ASIC3-based like
+ hx4700.
+
++config W1_MASTER_GPIO
++ tristate "GPIO 1-wire busmaster"
++ depends on GENERIC_GPIO
++ help
++ Say Y here if you want to communicate with your 1-wire devices using
++ GPIO pins. This driver uses the GPIO API to control the wire.
++
++ This support is also available as a module. If so, the module
++ will be called w1-gpio.ko.
++
+ endmenu
+
+Index: linux-2.6.24.5/drivers/w1/masters/Makefile
+===================================================================
+--- linux-2.6.24.5.orig/drivers/w1/masters/Makefile
++++ linux-2.6.24.5/drivers/w1/masters/Makefile
+@@ -6,3 +6,4 @@ obj-$(CONFIG_W1_MASTER_MATROX) += matro
+ obj-$(CONFIG_W1_MASTER_DS2490) += ds2490.o
+ obj-$(CONFIG_W1_MASTER_DS2482) += ds2482.o
+ obj-$(CONFIG_W1_MASTER_DS1WM) += ds1wm.o
++obj-$(CONFIG_W1_MASTER_GPIO) += w1-gpio.o
+Index: linux-2.6.24.5/drivers/w1/masters/w1-gpio.c
+===================================================================
+--- /dev/null
++++ linux-2.6.24.5/drivers/w1/masters/w1-gpio.c
+@@ -0,0 +1,124 @@
++/*
++ * w1-gpio - GPIO w1 bus master driver
++ *
++ * Copyright (C) 2007 Ville Syrjala <syrjala@sci.fi>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2
++ * as published by the Free Software Foundation.
++ */
++
++#include <linux/init.h>
++#include <linux/module.h>
++#include <linux/platform_device.h>
++#include <linux/w1-gpio.h>
++
++#include "../w1.h"
++#include "../w1_int.h"
++
++#include <asm/gpio.h>
++
++static void w1_gpio_write_bit_dir(void *data, u8 bit)
++{
++ struct w1_gpio_platform_data *pdata = data;
++
++ if (bit)
++ gpio_direction_input(pdata->pin);
++ else
++ gpio_direction_output(pdata->pin, 0);
++}
++
++static void w1_gpio_write_bit_val(void *data, u8 bit)
++{
++ struct w1_gpio_platform_data *pdata = data;
++
++ gpio_set_value(pdata->pin, bit);
++}
++
++static u8 w1_gpio_read_bit(void *data)
++{
++ struct w1_gpio_platform_data *pdata = data;
++
++ return gpio_get_value(pdata->pin);
++}
++
++static int __init w1_gpio_probe(struct platform_device *pdev)
++{
++ struct w1_bus_master *master;
++ struct w1_gpio_platform_data *pdata = pdev->dev.platform_data;
++ int err;
++
++ if (!pdata)
++ return -ENXIO;
++
++ master = kzalloc(sizeof(struct w1_bus_master), GFP_KERNEL);
++ if (!master)
++ return -ENOMEM;
++
++ err = gpio_request(pdata->pin, "w1");
++ if (err)
++ goto free_master;
++
++ master->data = pdata;
++ master->read_bit = w1_gpio_read_bit;
++
++ if (pdata->is_open_drain) {
++ gpio_direction_output(pdata->pin, 1);
++ master->write_bit = w1_gpio_write_bit_val;
++ } else {
++ gpio_direction_input(pdata->pin);
++ master->write_bit = w1_gpio_write_bit_dir;
++ }
++
++ err = w1_add_master_device(master);
++ if (err)
++ goto free_gpio;
++
++ platform_set_drvdata(pdev, master);
++
++ return 0;
++
++ free_gpio:
++ gpio_free(pdata->pin);
++ free_master:
++ kfree(master);
++
++ return err;
++}
++
++static int __exit w1_gpio_remove(struct platform_device *pdev)
++{
++ struct w1_bus_master *master = platform_get_drvdata(pdev);
++ struct w1_gpio_platform_data *pdata = pdev->dev.platform_data;
++
++ w1_remove_master_device(master);
++ gpio_free(pdata->pin);
++ kfree(master);
++
++ return 0;
++}
++
++static struct platform_driver w1_gpio_driver = {
++ .driver = {
++ .name = "w1-gpio",
++ .owner = THIS_MODULE,
++ },
++ .remove = __exit_p(w1_gpio_remove),
++};
++
++static int __init w1_gpio_init(void)
++{
++ return platform_driver_probe(&w1_gpio_driver, w1_gpio_probe);
++}
++
++static void __exit w1_gpio_exit(void)
++{
++ platform_driver_unregister(&w1_gpio_driver);
++}
++
++module_init(w1_gpio_init);
++module_exit(w1_gpio_exit);
++
++MODULE_DESCRIPTION("GPIO w1 bus master driver");
++MODULE_AUTHOR("Ville Syrjala <syrjala@sci.fi>");
++MODULE_LICENSE("GPL");
+Index: linux-2.6.24.5/include/linux/w1-gpio.h
+===================================================================
+--- /dev/null
++++ linux-2.6.24.5/include/linux/w1-gpio.h
+@@ -0,0 +1,23 @@
++/*
++ * w1-gpio interface to platform code
++ *
++ * Copyright (C) 2007 Ville Syrjala <syrjala@sci.fi>
++ *
++ * This program is free software; you can redistribute it and/or modify
++ * it under the terms of the GNU General Public License version 2
++ * as published by the Free Software Foundation.
++ */
++#ifndef _LINUX_W1_GPIO_H
++#define _LINUX_W1_GPIO_H
++
++/**
++ * struct w1_gpio_platform_data - Platform-dependent data for w1-gpio
++ * @pin: GPIO pin to use
++ * @is_open_drain: GPIO pin is configured as open drain
++ */
++struct w1_gpio_platform_data {
++ unsigned int pin;
++ unsigned int is_open_drain:1;
++};
++
++#endif /* _LINUX_W1_GPIO_H */
projects / openwrt / svn-archive / archive.git / blobdiff