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authorBoris Brezillon <boris.brezillon@free-electrons.com>2015-07-01 10:21:49 +0200
committerThierry Reding <thierry.reding@gmail.com>2015-07-20 09:51:27 +0200
commit011e76314818b6a24d5347b2d83b8a577e6aaae6 (patch)
treee9acaad5ccd095ba7c3a03e706556a3d600273aa /include/linux/pwm.h
parenta1cf42171a2e3c33cbc12bb037795caf0589149b (diff)
pwm: Add pwm_get_polarity() helper function
Some drivers are directly accessing the ->polarity field in pwm_device. Add a helper to retrieve the current polarity so that we can easily move this field elsewhere (required to support atomic update). Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
Diffstat (limited to 'include/linux/pwm.h')
-rw-r--r--include/linux/pwm.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/pwm.h b/include/linux/pwm.h
index d8f691339a45..6f286df30021 100644
--- a/include/linux/pwm.h
+++ b/include/linux/pwm.h
@@ -124,6 +124,11 @@ static inline unsigned int pwm_get_duty_cycle(const struct pwm_device *pwm)
*/
int pwm_set_polarity(struct pwm_device *pwm, enum pwm_polarity polarity);
+static inline enum pwm_polarity pwm_get_polarity(const struct pwm_device *pwm)
+{
+ return pwm ? pwm->polarity : PWM_POLARITY_NORMAL;
+}
+
/**
* struct pwm_ops - PWM controller operations
* @request: optional hook for requesting a PWM