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authorLinus Torvalds2021-05-05 12:53:16 -0700
committerLinus Torvalds2021-05-05 12:53:16 -0700
commit7b9df264f0ab6595eabe367b04c81824a06d9227 (patch)
treee3b0adbcec0afd2bce2961546c356602e601f218 /include
parent583f2bcf86a322dc0387f5a868026d2e2fe18261 (diff)
parenta6efb35019d00f483a0e5f188747723371d659fe (diff)
Merge tag 'pwm/for-5.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm
Pull pwm updates from Thierry Reding: "This adds support for the PWM controller found on Toshiba Visconti SoCs and converts a couple of drivers to the atomic API. There's also a bunch of cleanups and minor fixes across the board" * tag 'pwm/for-5.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm: (35 commits) pwm: Reword docs about pwm_apply_state() pwm: atmel: Improve duty cycle calculation in .apply() pwm: atmel: Fix duty cycle calculation in .get_state() pwm: visconti: Add Toshiba Visconti SoC PWM support dt-bindings: pwm: Add bindings for Toshiba Visconti PWM Controller arm64: dts: rockchip: Remove clock-names from PWM nodes ARM: dts: rockchip: Remove clock-names from PWM nodes dt-bindings: pwm: rockchip: Add more compatible strings dt-bindings: pwm: Convert pwm-rockchip.txt to YAML pwm: mediatek: Remove unused function pwm: pca9685: Improve runtime PM behavior pwm: pca9685: Support hardware readout pwm: pca9685: Switch to atomic API pwm: lpss: Don't modify HW state in .remove callback pwm: sti: Free resources only after pwmchip_remove() pwm: sti: Don't modify HW state in .remove callback pwm: lpc3200: Don't modify HW state in .remove callback pwm: lpc18xx-sct: Free resources only after pwmchip_remove() pwm: bcm-kona: Don't modify HW state in .remove callback pwm: bcm2835: Free resources only after pwmchip_remove() ...
Diffstat (limited to 'include')
-rw-r--r--include/linux/pwm.h7
1 files changed, 5 insertions, 2 deletions
diff --git a/include/linux/pwm.h b/include/linux/pwm.h
index e4d84d4db293..5bb90af4997e 100644
--- a/include/linux/pwm.h
+++ b/include/linux/pwm.h
@@ -91,6 +91,11 @@ struct pwm_device {
* pwm_get_state() - retrieve the current PWM state
* @pwm: PWM device
* @state: state to fill with the current PWM state
+ *
+ * The returned PWM state represents the state that was applied by a previous call to
+ * pwm_apply_state(). Drivers may have to slightly tweak that state before programming it to
+ * hardware. If pwm_apply_state() was never called, this returns either the current hardware
+ * state (if supported) or the default settings.
*/
static inline void pwm_get_state(const struct pwm_device *pwm,
struct pwm_state *state)
@@ -392,8 +397,6 @@ int pwm_capture(struct pwm_device *pwm, struct pwm_capture *result,
int pwm_set_chip_data(struct pwm_device *pwm, void *data);
void *pwm_get_chip_data(struct pwm_device *pwm);
-int pwmchip_add_with_polarity(struct pwm_chip *chip,
- enum pwm_polarity polarity);
int pwmchip_add(struct pwm_chip *chip);
int pwmchip_remove(struct pwm_chip *chip);
struct pwm_device *pwm_request_from_chip(struct pwm_chip *chip,