diff options
Diffstat (limited to 'backport/compat/compat-3.4.c')
| -rw-r--r-- | backport/compat/compat-3.4.c | 201 |
1 files changed, 0 insertions, 201 deletions
diff --git a/backport/compat/compat-3.4.c b/backport/compat/compat-3.4.c deleted file mode 100644 index 52753725..00000000 --- a/backport/compat/compat-3.4.c +++ /dev/null @@ -1,201 +0,0 @@ -/* - * Copyright 2012 Luis R. Rodriguez <mcgrof@frijolero.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. - * - * Backport functionality introduced in Linux 3.4. - */ - -#include <linux/fs.h> -#include <linux/module.h> -#include <linux/wait.h> -#include <linux/compat.h> -#include <asm/uaccess.h> - -#if LINUX_VERSION_IS_GEQ(3,2,0) -#include <linux/regmap.h> -#include <linux/i2c.h> -#include <linux/spi/spi.h> -#endif /* LINUX_VERSION_IS_GEQ(3,2,0) */ - -#if LINUX_VERSION_IS_GEQ(3,2,0) - -#if defined(CONFIG_REGMAP) -static void devm_regmap_release(struct device *dev, void *res) -{ - regmap_exit(*(struct regmap **)res); -} - -#if defined(CONFIG_REGMAP_I2C) -static int regmap_i2c_write( - struct device *dev, - const void *data, - size_t count) -{ - struct i2c_client *i2c = to_i2c_client(dev); - int ret; - - ret = i2c_master_send(i2c, data, count); - if (ret == count) - return 0; - else if (ret < 0) - return ret; - else - return -EIO; -} - -static int regmap_i2c_gather_write( - struct device *dev, - const void *reg, size_t reg_size, - const void *val, size_t val_size) -{ - struct i2c_client *i2c = to_i2c_client(dev); - struct i2c_msg xfer[2]; - int ret; - - /* If the I2C controller can't do a gather tell the core, it - * will substitute in a linear write for us. - */ - if (!i2c_check_functionality(i2c->adapter, I2C_FUNC_NOSTART)) - return -ENOTSUPP; - - xfer[0].addr = i2c->addr; - xfer[0].flags = 0; - xfer[0].len = reg_size; - xfer[0].buf = (void *)reg; - - xfer[1].addr = i2c->addr; - xfer[1].flags = I2C_M_NOSTART; - xfer[1].len = val_size; - xfer[1].buf = (void *)val; - - ret = i2c_transfer(i2c->adapter, xfer, 2); - if (ret == 2) - return 0; - if (ret < 0) - return ret; - else - return -EIO; -} - -static int regmap_i2c_read( - struct device *dev, - const void *reg, size_t reg_size, - void *val, size_t val_size) -{ - struct i2c_client *i2c = to_i2c_client(dev); - struct i2c_msg xfer[2]; - int ret; - - xfer[0].addr = i2c->addr; - xfer[0].flags = 0; - xfer[0].len = reg_size; - xfer[0].buf = (void *)reg; - - xfer[1].addr = i2c->addr; - xfer[1].flags = I2C_M_RD; - xfer[1].len = val_size; - xfer[1].buf = val; - - ret = i2c_transfer(i2c->adapter, xfer, 2); - if (ret == 2) - return 0; - else if (ret < 0) - return ret; - else - return -EIO; -} - -static struct regmap_bus regmap_i2c = { - .write = regmap_i2c_write, - .gather_write = regmap_i2c_gather_write, - .read = regmap_i2c_read, -}; -#endif /* defined(CONFIG_REGMAP_I2C) */ - -/** - * devm_regmap_init(): Initialise managed register map - * - * @dev: Device that will be interacted with - * @bus: Bus-specific callbacks to use with device - * @bus_context: Data passed to bus-specific callbacks - * @config: Configuration for register map - * - * The return value will be an ERR_PTR() on error or a valid pointer - * to a struct regmap. This function should generally not be called - * directly, it should be called by bus-specific init functions. The - * map will be automatically freed by the device management code. - */ -struct regmap *devm_regmap_init(struct device *dev, - const struct regmap_bus *bus, - const struct regmap_config *config) -{ - struct regmap **ptr, *regmap; - - ptr = devres_alloc(devm_regmap_release, sizeof(*ptr), GFP_KERNEL); - if (!ptr) - return ERR_PTR(-ENOMEM); - - regmap = regmap_init(dev, - bus, - config); - if (!IS_ERR(regmap)) { - *ptr = regmap; - devres_add(dev, ptr); - } else { - devres_free(ptr); - } - - return regmap; -} -EXPORT_SYMBOL_GPL(devm_regmap_init); - -#if defined(CONFIG_REGMAP_I2C) -/** - * devm_regmap_init_i2c(): Initialise managed register map - * - * @i2c: Device that will be interacted with - * @config: Configuration for register map - * - * The return value will be an ERR_PTR() on error or a valid pointer - * to a struct regmap. The regmap will be automatically freed by the - * device management code. - */ -struct regmap *devm_regmap_init_i2c(struct i2c_client *i2c, - const struct regmap_config *config) -{ - return devm_regmap_init(&i2c->dev, ®map_i2c, config); -} -EXPORT_SYMBOL_GPL(devm_regmap_init_i2c); -#endif /* defined(CONFIG_REGMAP_I2C) */ - -#endif /* defined(CONFIG_REGMAP) */ -#endif /* LINUX_VERSION_IS_GEQ(3,2,0) */ - -int simple_open(struct inode *inode, struct file *file) -{ - if (inode->i_private) - file->private_data = inode->i_private; - return 0; -} -EXPORT_SYMBOL_GPL(simple_open); - -#ifdef CONFIG_COMPAT -static int __compat_put_timespec(const struct timespec *ts, struct compat_timespec __user *cts) -{ - return (!access_ok(VERIFY_WRITE, cts, sizeof(*cts)) || - __put_user(ts->tv_sec, &cts->tv_sec) || - __put_user(ts->tv_nsec, &cts->tv_nsec)) ? -EFAULT : 0; -} - -int compat_put_timespec(const struct timespec *ts, void __user *uts) -{ - if (COMPAT_USE_64BIT_TIME) - return copy_to_user(uts, ts, sizeof *ts) ? -EFAULT : 0; - else - return __compat_put_timespec(ts, uts); -} -EXPORT_SYMBOL_GPL(compat_put_timespec); -#endif |