openwrt/upstream - upstream openwrt

	Commit message (Expand)	Author	Age	Files	Lines
*	scripts/ipkg: print warnings/errors to stderr	Jonas Gorski	2013-02-21	1	-16/+16
*	ipkg: strip directory entries from package file list when offline installing ...	Jo-Philipp Wich	2010-03-01	1	-1/+1
*	make scripts/ipkg more portable by using printf instead of echo -n	Felix Fietkau	2009-09-26	1	-4/+4
*	Workaround a bug(?) in tar in debian squeeze, which causes the build process ...	Lars-Peter Clausen	2009-06-08	1	-3/+3
*	get rid of an illegal characters warning with packages that contain uppercase...	Felix Fietkau	2009-03-09	1	-2/+2
*	add "Architecture" field to opkg status file (closes: #3901)	Nicolas Thill	2008-08-20	1	-1/+1
*	make opkg the default package manager, disable busybox ipkg from building by ...	Travis Kemen	2008-08-16	1	-1/+1
*	cosmetic fixes for ipkg	Felix Fietkau	2007-01-10	1	-5/+1
*	finally move buildroot-ng to trunk	Felix Fietkau	2016-03-20	1	-0/+1187

/* * Custom GPIO-based I2C driver * * Copyright (C) 2007-2008 Gabor Juhos <juhosg@openwrt.org> * * 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. * * --------------------------------------------------------------------------- * * The behaviour of this driver can be altered by setting some parameters * from the insmod command line. * * The following parameters are adjustable: * * bus0 These four arguments can be arrays of * bus1 1-8 unsigned integers as follows: * bus2 * bus3 <id>,<sda>,<scl>,<udelay>,<timeout>,<sda_od>,<scl_od>,<scl_oo> * * where: * * <id> ID to used as device_id for the corresponding bus (required) * <sda> GPIO pin ID to used for SDA (required) * <scl> GPIO pin ID to used for SCL (required) * <udelay> signal toggle delay. * <timeout> clock stretching timeout. * <sda_od> SDA is configured as open drain. * <scl_od> SCL is configured as open drain. * <scl_oo> SCL output drivers cannot be turned off. * * See include/i2c-gpio.h for more information about the parameters. * * If this driver is built into the kernel, you can use the following kernel * command line parameters, with the same values as the corresponding module * parameters listed above: * * i2c-gpio-custom.bus0 * i2c-gpio-custom.bus1 * i2c-gpio-custom.bus2 * i2c-gpio-custom.bus3 */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/init.h> #include <linux/platform_device.h> #include <linux/i2c-gpio.h> #define DRV_NAME "i2c-gpio-custom" #define DRV_DESC "Custom GPIO-based I2C driver" #define DRV_VERSION "0.1.1" #define PFX DRV_NAME ": " #define BUS_PARAM_ID 0 #define BUS_PARAM_SDA 1 #define BUS_PARAM_SCL 2 #define BUS_PARAM_UDELAY 3 #define BUS_PARAM_TIMEOUT 4 #define BUS_PARAM_SDA_OD 5 #define BUS_PARAM_SCL_OD 6 #define BUS_PARAM_SCL_OO 7 #define BUS_PARAM_REQUIRED 3 #define BUS_PARAM_COUNT 8 #define BUS_COUNT_MAX 4 static unsigned int bus0[BUS_PARAM_COUNT] __initdata; static unsigned int bus1[BUS_PARAM_COUNT] __initdata; static unsigned int bus2[BUS_PARAM_COUNT] __initdata; static unsigned int bus3[BUS_PARAM_COUNT] __initdata; static unsigned int bus_nump[BUS_COUNT_MAX] __initdata; #define BUS_PARM_DESC \ " config -> id,sda,scl[,udelay,timeout,sda_od,scl_od,scl_oo]" module_param_array(bus0, uint, &bus_nump[0], 0); MODULE_PARM_DESC(bus0, "bus0" BUS_PARM_DESC); module_param_array(bus1, uint, &bus_nump[1], 0); MODULE_PARM_DESC(bus1, "bus1" BUS_PARM_DESC); module_param_array(bus2, uint, &bus_nump[2], 0); MODULE_PARM_DESC(bus2, "bus2" BUS_PARM_DESC); module_param_array(bus3, uint, &bus_nump[3], 0); MODULE_PARM_DESC(bus3, "bus3" BUS_PARM_DESC); static struct platform_device *devices[BUS_COUNT_MAX]; static unsigned int nr_devices; static void i2c_gpio_custom_cleanup(void) { int i; for (i = 0; i < nr_devices; i++) if (devices[i]) platform_device_put(devices[i]); } static int __init i2c_gpio_custom_add_one(unsigned int id, unsigned int *params) { struct platform_device *pdev; struct i2c_gpio_platform_data pdata; int err; if (!bus_nump[id]) return 0; if (bus_nump[id] < BUS_PARAM_REQUIRED) { printk(KERN_ERR PFX "not enough parameters for bus%d\n", id); err = -EINVAL; goto err; } pdev = platform_device_alloc("i2c-gpio", params[BUS_PARAM_ID]); if (!pdev) { err = -ENOMEM; goto err; } pdata.sda_pin = params[BUS_PARAM_SDA]; pdata.scl_pin = params[BUS_PARAM_SCL]; pdata.udelay = params[BUS_PARAM_UDELAY]; pdata.timeout = params[BUS_PARAM_TIMEOUT]; pdata.sda_is_open_drain = params[BUS_PARAM_SDA_OD] != 0; pdata.scl_is_open_drain = params[BUS_PARAM_SCL_OD] != 0; pdata.scl_is_output_only = params[BUS_PARAM_SCL_OO] != 0; err = platform_device_add_data(pdev, &pdata, sizeof(pdata)); if (err) goto err_put; err = platform_device_add(pdev); if (err) goto err_put; devices[nr_devices++] = pdev; return 0; err_put: platform_device_put(pdev); err: return err; } static int __init i2c_gpio_custom_probe(void) { int err; printk(KERN_INFO DRV_DESC " version " DRV_VERSION "\n"); err = i2c_gpio_custom_add_one(0, bus0); if (err) goto err; err = i2c_gpio_custom_add_one(1, bus1); if (err) goto err; err = i2c_gpio_custom_add_one(2, bus2); if (err) goto err; err = i2c_gpio_custom_add_one(3, bus3); if (err) goto err; if (!nr_devices) { printk(KERN_ERR PFX "no bus parameter(s) specified\n"); err = -ENODEV; goto err; } return 0; err: i2c_gpio_custom_cleanup(); return err; } #ifdef MODULE static int __init i2c_gpio_custom_init(void) { return i2c_gpio_custom_probe(); } module_init(i2c_gpio_custom_init); static void __exit i2c_gpio_custom_exit(void) { i2c_gpio_custom_cleanup(); } module_exit(i2c_gpio_custom_exit); #else subsys_initcall(i2c_gpio_custom_probe); #endif /* MODULE*/ MODULE_LICENSE("GPL v2"); MODULE_AUTHOR("Gabor Juhos <juhosg@openwrt.org >"); MODULE_DESCRIPTION(DRV_DESC); MODULE_VERSION(DRV_VERSION);