From: Imre Kaloz Date: Fri, 30 May 2008 10:20:36 +0000 (+0000) Subject: gpiodev should be in drivers/char, not in drivers/gpio.. X-Git-Tag: reboot~26426 X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=65ebb5780c2748dc066873537f86af994f63552c;p=openwrt%2Fopenwrt.git gpiodev should be in drivers/char, not in drivers/gpio.. SVN-Revision: 11294 --- diff --git a/target/linux/generic-2.6/files-2.6.25/drivers/char/gpio_dev.c b/target/linux/generic-2.6/files-2.6.25/drivers/char/gpio_dev.c new file mode 100644 index 0000000000..48ef76f8a9 --- /dev/null +++ b/target/linux/generic-2.6/files-2.6.25/drivers/char/gpio_dev.c @@ -0,0 +1,201 @@ +/* + * character device wrapper for generic gpio layer + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA02111-1307USA + * + * Feedback, Bugs... blogic@openwrt.org + * + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define DRVNAME "gpiodev" +#define DEVNAME "gpio" + +static int dev_major; +static unsigned int gpio_access_mask; +static struct class *gpio_class; + +/* Counter is 1, if the device is not opened and zero (or less) if opened. */ +static atomic_t gpio_open_cnt = ATOMIC_INIT(1); + +static int +gpio_ioctl(struct inode * inode, struct file * file, unsigned int cmd, unsigned long arg) +{ + int retval = 0; + + if (((1 << arg) & gpio_access_mask) != (1 << arg)) + { + retval = -EINVAL; + goto out; + } + + switch (cmd) + { + case GPIO_GET: + retval = gpio_get_value(arg); + break; + + case GPIO_SET: + gpio_set_value(arg, 1); + break; + + case GPIO_CLEAR: + gpio_set_value(arg, 0); + break; + + case GPIO_DIR_IN: + gpio_direction_input(arg); + break; + + case GPIO_DIR_OUT: + gpio_direction_output(arg, 0); + break; + + default: + retval = -EINVAL; + break; + } + +out: + return retval; +} + +static int +gpio_open(struct inode *inode, struct file *file) +{ + int result = 0; + unsigned int dev_minor = MINOR(inode->i_rdev); + + if (dev_minor != 0) + { + printk(KERN_ERR DRVNAME ": trying to access unknown minor device -> %d\n", dev_minor); + result = -ENODEV; + goto out; + } + + /* FIXME: We should really allow multiple applications to open the device + * at the same time, as long as the apps access different IO pins. + * The generic gpio-registration functions can be used for that. + * Two new IOCTLs have to be introduced for that. Need to check userspace + * compatibility first. --mb */ + if (!atomic_dec_and_test(&gpio_open_cnt)) { + atomic_inc(&gpio_open_cnt); + printk(KERN_ERR DRVNAME ": Device with minor ID %d already in use\n", dev_minor); + result = -EBUSY; + goto out; + } + +out: + return result; +} + +static int +gpio_close(struct inode * inode, struct file * file) +{ + smp_mb__before_atomic_inc(); + atomic_inc(&gpio_open_cnt); + + return 0; +} + +struct file_operations gpio_fops = { + ioctl: gpio_ioctl, + open: gpio_open, + release: gpio_close +}; + +static int +gpio_probe(struct platform_device *dev) +{ + int result = 0; + + dev_major = register_chrdev(0, DEVNAME, &gpio_fops); + if (!dev_major) + { + printk(KERN_ERR DRVNAME ": Error whilst opening %s \n", DEVNAME); + result = -ENODEV; + goto out; + } + + gpio_class = class_create(THIS_MODULE, DEVNAME); + class_device_create(gpio_class, NULL, MKDEV(dev_major, 0), NULL, DEVNAME); + + printk(KERN_INFO DRVNAME ": gpio device registered with major %d\n", dev_major); + + if (dev->num_resources != 1) + { + printk(KERN_ERR DRVNAME ": device may only have 1 resource\n"); + result = -ENODEV; + goto out; + } + + gpio_access_mask = dev->resource[0].start; + + printk(KERN_INFO DRVNAME ": gpio platform device registered with access mask %08X\n", gpio_access_mask); +out: + return result; +} + +static int +gpio_remove(struct platform_device *dev) +{ + unregister_chrdev(dev_major, DEVNAME); + return 0; +} + +static struct +platform_driver gpio_driver = { + .probe = gpio_probe, + .remove = gpio_remove, + .driver = { + .name = "GPIODEV", + .owner = THIS_MODULE, + }, +}; + +static int __init +gpio_mod_init(void) +{ + int ret = platform_driver_register(&gpio_driver); + if (ret) + printk(KERN_INFO DRVNAME ": Error registering platfom driver!"); + + return ret; +} + +static void __exit +gpio_mod_exit(void) +{ + platform_driver_unregister(&gpio_driver); +} + +module_init (gpio_mod_init); +module_exit (gpio_mod_exit); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("John Crispin / OpenWrt"); +MODULE_DESCRIPTION("Character device for for generic gpio api"); diff --git a/target/linux/generic-2.6/files-2.6.25/drivers/gpio/gpio_dev.c b/target/linux/generic-2.6/files-2.6.25/drivers/gpio/gpio_dev.c deleted file mode 100644 index 48ef76f8a9..0000000000 --- a/target/linux/generic-2.6/files-2.6.25/drivers/gpio/gpio_dev.c +++ /dev/null @@ -1,201 +0,0 @@ -/* - * character device wrapper for generic gpio layer - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA02111-1307USA - * - * Feedback, Bugs... blogic@openwrt.org - * - */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#define DRVNAME "gpiodev" -#define DEVNAME "gpio" - -static int dev_major; -static unsigned int gpio_access_mask; -static struct class *gpio_class; - -/* Counter is 1, if the device is not opened and zero (or less) if opened. */ -static atomic_t gpio_open_cnt = ATOMIC_INIT(1); - -static int -gpio_ioctl(struct inode * inode, struct file * file, unsigned int cmd, unsigned long arg) -{ - int retval = 0; - - if (((1 << arg) & gpio_access_mask) != (1 << arg)) - { - retval = -EINVAL; - goto out; - } - - switch (cmd) - { - case GPIO_GET: - retval = gpio_get_value(arg); - break; - - case GPIO_SET: - gpio_set_value(arg, 1); - break; - - case GPIO_CLEAR: - gpio_set_value(arg, 0); - break; - - case GPIO_DIR_IN: - gpio_direction_input(arg); - break; - - case GPIO_DIR_OUT: - gpio_direction_output(arg, 0); - break; - - default: - retval = -EINVAL; - break; - } - -out: - return retval; -} - -static int -gpio_open(struct inode *inode, struct file *file) -{ - int result = 0; - unsigned int dev_minor = MINOR(inode->i_rdev); - - if (dev_minor != 0) - { - printk(KERN_ERR DRVNAME ": trying to access unknown minor device -> %d\n", dev_minor); - result = -ENODEV; - goto out; - } - - /* FIXME: We should really allow multiple applications to open the device - * at the same time, as long as the apps access different IO pins. - * The generic gpio-registration functions can be used for that. - * Two new IOCTLs have to be introduced for that. Need to check userspace - * compatibility first. --mb */ - if (!atomic_dec_and_test(&gpio_open_cnt)) { - atomic_inc(&gpio_open_cnt); - printk(KERN_ERR DRVNAME ": Device with minor ID %d already in use\n", dev_minor); - result = -EBUSY; - goto out; - } - -out: - return result; -} - -static int -gpio_close(struct inode * inode, struct file * file) -{ - smp_mb__before_atomic_inc(); - atomic_inc(&gpio_open_cnt); - - return 0; -} - -struct file_operations gpio_fops = { - ioctl: gpio_ioctl, - open: gpio_open, - release: gpio_close -}; - -static int -gpio_probe(struct platform_device *dev) -{ - int result = 0; - - dev_major = register_chrdev(0, DEVNAME, &gpio_fops); - if (!dev_major) - { - printk(KERN_ERR DRVNAME ": Error whilst opening %s \n", DEVNAME); - result = -ENODEV; - goto out; - } - - gpio_class = class_create(THIS_MODULE, DEVNAME); - class_device_create(gpio_class, NULL, MKDEV(dev_major, 0), NULL, DEVNAME); - - printk(KERN_INFO DRVNAME ": gpio device registered with major %d\n", dev_major); - - if (dev->num_resources != 1) - { - printk(KERN_ERR DRVNAME ": device may only have 1 resource\n"); - result = -ENODEV; - goto out; - } - - gpio_access_mask = dev->resource[0].start; - - printk(KERN_INFO DRVNAME ": gpio platform device registered with access mask %08X\n", gpio_access_mask); -out: - return result; -} - -static int -gpio_remove(struct platform_device *dev) -{ - unregister_chrdev(dev_major, DEVNAME); - return 0; -} - -static struct -platform_driver gpio_driver = { - .probe = gpio_probe, - .remove = gpio_remove, - .driver = { - .name = "GPIODEV", - .owner = THIS_MODULE, - }, -}; - -static int __init -gpio_mod_init(void) -{ - int ret = platform_driver_register(&gpio_driver); - if (ret) - printk(KERN_INFO DRVNAME ": Error registering platfom driver!"); - - return ret; -} - -static void __exit -gpio_mod_exit(void) -{ - platform_driver_unregister(&gpio_driver); -} - -module_init (gpio_mod_init); -module_exit (gpio_mod_exit); - -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("John Crispin / OpenWrt"); -MODULE_DESCRIPTION("Character device for for generic gpio api"); diff --git a/target/linux/generic-2.6/patches-2.6.25/420-gpiodev.patch b/target/linux/generic-2.6/patches-2.6.25/420-gpiodev.patch index 215fc53344..ea7c244557 100644 --- a/target/linux/generic-2.6/patches-2.6.25/420-gpiodev.patch +++ b/target/linux/generic-2.6/patches-2.6.25/420-gpiodev.patch @@ -1,10 +1,9 @@ -Index: linux-2.6.25.4/drivers/gpio/Kconfig -=================================================================== ---- linux-2.6.25.4.orig/drivers/gpio/Kconfig -+++ linux-2.6.25.4/drivers/gpio/Kconfig -@@ -2,6 +2,13 @@ - # GPIO infrastructure and expanders - # +diff -Nur linux-2.6.25/drivers/char/Kconfig linux-2.6.25-owrt/drivers/char/Kconfig +--- linux-2.6.25/drivers/char/Kconfig 2008-05-15 17:00:12.000000000 +0200 ++++ linux-2.6.25-owrt/drivers/char/Kconfig 2008-05-30 11:58:39.000000000 +0200 +@@ -955,6 +955,13 @@ + + If compiled as a module, it will be called cs5535_gpio. +config GPIO_DEVICE + tristate "GPIO device support" @@ -13,15 +12,17 @@ Index: linux-2.6.25.4/drivers/gpio/Kconfig + Say Y to enable Linux GPIO device support. This allows control of + GPIO pins using a character device + - config HAVE_GPIO_LIB - bool - help -Index: linux-2.6.25.4/drivers/gpio/Makefile -=================================================================== ---- linux-2.6.25.4.orig/drivers/gpio/Makefile -+++ linux-2.6.25.4/drivers/gpio/Makefile -@@ -7,3 +7,4 @@ obj-$(CONFIG_HAVE_GPIO_LIB) += gpiolib.o - obj-$(CONFIG_GPIO_MCP23S08) += mcp23s08.o - obj-$(CONFIG_GPIO_PCA953X) += pca953x.o - obj-$(CONFIG_GPIO_PCF857X) += pcf857x.o + config GPIO_VR41XX + tristate "NEC VR4100 series General-purpose I/O Unit support" + depends on CPU_VR41XX +diff -Nur linux-2.6.25/drivers/char/Makefile linux-2.6.25-owrt/drivers/char/Makefile +--- linux-2.6.25/drivers/char/Makefile 2008-05-15 17:00:12.000000000 +0200 ++++ linux-2.6.25-owrt/drivers/char/Makefile 2008-05-30 11:57:33.000000000 +0200 +@@ -94,6 +94,7 @@ + obj-$(CONFIG_PC8736x_GPIO) += pc8736x_gpio.o + obj-$(CONFIG_NSC_GPIO) += nsc_gpio.o + obj-$(CONFIG_CS5535_GPIO) += cs5535_gpio.o +obj-$(CONFIG_GPIO_DEVICE) += gpio_dev.o + obj-$(CONFIG_GPIO_VR41XX) += vr41xx_giu.o + obj-$(CONFIG_GPIO_TB0219) += tb0219.o + obj-$(CONFIG_TELCLOCK) += tlclk.o