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greybus: kernel_ver.h: provide pwm_is_enabled() 

In the 4.7-rc1 kernel release, PWMF_ENABLED is removed and
pwm_is_enabled() is the correct way to test if a pwm device is enabled,
so provide a version of that function that will work on all older
kernels and change the pwm.c driver to use it so that it will work on
newer kernels as well.

Tested:
	Tree now builds successfully against 3.14.y, 4.4.y, 4.5.y,
	4.6.y, and 4.7-rc2 kernels

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
This commit is contained in:
Greg Kroah-Hartman 2016-06-07 21:33:54 -07:00
parent 4d27574cd3
commit 44d6449350
2 changed files with 8 additions and 1 deletions
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7
drivers/staging/greybus/kernel_ver.h
View File

@ -328,4 +328,11 @@ static inline void reinit_completion(struct completion *x)
}
#endif
#ifdef PWMF_ENABLED
static inline bool pwm_is_enabled(const struct pwm_device *pwm)
{
return test_bit(PWMF_ENABLED, &pwm->flags);
}
#endif
#endif /* __GREYBUS_KERNEL_VER_H */

2
drivers/staging/greybus/pwm.c
View File

@ -132,7 +132,7 @@ static void gb_pwm_free(struct pwm_chip *chip, struct pwm_device *pwm)
{
struct gb_pwm_chip *pwmc = pwm_chip_to_gb_pwm_chip(chip);
if (test_bit(PWMF_ENABLED, &pwm->flags))
if (pwm_is_enabled(pwm))
dev_warn(chip->dev, "freeing PWM device without disabling\n");
gb_pwm_deactivate_operation(pwmc, pwm->hwpwm);