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Commit 0ef5be18 authored by Viresh Kumar's avatar Viresh Kumar Committed by Greg Kroah-Hartman
Browse files

greybus: kernel_ver: Add kstrtobool() 



It was added in 4.6 and is required for one of the use case, copy it.

Signed-off-by: default avatarViresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@google.com>
parent 74ec7598

drivers/staging/greybus/kernel_ver.h

+48 −0
Original line number Diff line number Diff line
@@ -341,4 +341,52 @@ static inline bool pwm_is_enabled(const struct pwm_device *pwm) 
}

#endif



#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 6, 0)

/**

 * kstrtobool - convert common user inputs into boolean values

 * @s: input string

 * @res: result

 *

 * This routine returns 0 iff the first character is one of 'Yy1Nn0', or

 * [oO][NnFf] for "on" and "off". Otherwise it will return -EINVAL.  Value

 * pointed to by res is updated upon finding a match.

 */

static inline int kstrtobool(const char *s, bool *res)

{

	if (!s)

		return -EINVAL;



	switch (s[0]) {

	case 'y':

	case 'Y':

	case '1':

		*res = true;

		return 0;

	case 'n':

	case 'N':

	case '0':

		*res = false;

		return 0;

	case 'o':

	case 'O':

		switch (s[1]) {

		case 'n':

		case 'N':

			*res = true;

			return 0;

		case 'f':

		case 'F':

			*res = false;

			return 0;

		default:

			break;

		}

	default:

		break;

	}



	return -EINVAL;

}

#endif



#endif	/* __GREYBUS_KERNEL_VER_H */