regmap: Add support for writing to regmap registers via debugfs

	return ret;

}

#undef REGMAP_ALLOW_WRITE_DEBUGFS

#ifdef REGMAP_ALLOW_WRITE_DEBUGFS

/*

 * This can be dangerous especially when we have clients such as

 * PMICs, therefore don't provide any real compile time configuration option

 * for this feature, people who want to use this will need to modify

 * the source code directly.

 */

static ssize_t regmap_map_write_file(struct file *file,

				     const char __user *user_buf,

				     size_t count, loff_t *ppos)

{

	char buf[32];

	size_t buf_size;

	char *start = buf;

	unsigned long reg, value;

	struct regmap *map = file->private_data;

	buf_size = min(count, (sizeof(buf)-1));

	if (copy_from_user(buf, user_buf, buf_size))

		return -EFAULT;

	buf[buf_size] = 0;

	while (*start == ' ')

		start++;

	reg = simple_strtoul(start, &start, 16);

	while (*start == ' ')

		start++;

	if (strict_strtoul(start, 16, &value))

		return -EINVAL;

	/* Userspace has been fiddling around behind the kernel's back */

	add_taint(TAINT_USER);

	regmap_write(map, reg, value);

	return buf_size;

}

#else

#define regmap_map_write_file NULL

#endif

static const struct file_operations regmap_map_fops = {

	.open = regmap_open_file,

	.read = regmap_map_read_file,

	.write = regmap_map_write_file,

	.llseek = default_llseek,

};