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greybus: don't key on an enumerated constant

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The symbol PWMF_ENABLED is defined via an enum, which is not defined
at the time the preprocessor passes through "kernel_ver.h".  So we
can't use it in an #if statement expression.

Use the Linux kernel version instead.

Change-Id: Id427224b1dfecfd886fcdae89c4bcf711b616439
Signed-off-by: Alex Elder <elder@linaro.org>
This commit is contained in:
Alex Elder 2016-06-08 12:44:22 -07:00 committed by Akash Choudhari
parent 8fb76c3cfd
commit 365d79fc20
1 changed files with 7 additions and 1 deletions
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8
drivers/staging/greybus/kernel_ver.h
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@ -328,7 +328,13 @@ static inline void reinit_completion(struct completion *x)
}
#endif
#ifdef PWMF_ENABLED
#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 2, 0)
#include <linux/pwm.h>
/*
* pwm_is_enabled() was first defined in 4.2-rc1 (first commit!).
* PWMF_ENABLED was first defined in 3.5-rc2, but our code is
* always newer than that.
*/
static inline bool pwm_is_enabled(const struct pwm_device *pwm)
{
return test_bit(PWMF_ENABLED, &pwm->flags);