Merge tag 'pwm/for-6.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/ukleinek/linux

Pull pwm updates from Uwe Kleine-König:
 "Apart from the usual mix of new drivers (pwm-argon-fan-hat), adding
  support for variants to existing drivers, minor improvements to both
  drivers and docs, device tree documenation updates, the noteworthy
  changes are:

   - A hwmon companion driver to pwm-mc33xs2410 living in drivers/hwmon
     and acked by Guenter Roeck

   - chardev support for PWM devices. This leverages atomic PWM updates
     to userspace and at the same time simplifies and accelerates PWM
     configuration changes"

* tag 'pwm/for-6.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/ukleinek/linux: (35 commits)
  pwm: raspberrypi-poe: Fix spelling mistake "Firwmware" -> "Firmware"
  hwmon: add support for MC33XS2410 hardware monitoring
  pwm: mc33xs2410: add hwmon support
  pwm: img: Remove redundant pm_runtime_mark_last_busy() calls
  pwm: Expose PWM_WFHWSIZE in public header
  dt-bindings: pwm: Convert lpc32xx-pwm.txt to yaml format
  docs: pwm: Adapt Locking paragraph to reality
  pwm: twl-led: Drop driver local locking
  pwm: sun4i: Drop driver local locking
  pwm: sti: Drop driver local locking
  pwm: microchip-core: Drop driver local locking
  pwm: lpc18xx-sct: Drop driver local locking
  pwm: fsl-ftm: Drop driver local locking
  pwm: clps711x: Drop driver local locking
  pwm: atmel: Drop driver local locking
  pwm: argon-fan-hat: Add Argon40 Fan HAT support
  dt-bindings: pwm: argon40,fan-hat: Document Argon40 Fan HAT
  dt-bindings: vendor-prefixes: Document Argon40
  pwm: pwm-mediatek: Add support for PWM IP V3.0.2 in MT6991/MT8196
  pwm: pwm-mediatek: Pass PWM_CK_26M_SEL from platform data
  ...

1 files changed, 1 insertions, 16 deletions

diff --git a/drivers/pwm/pwm-microchip-core.c b/drivers/pwm/pwm-microchip-core.c
index 12821b4bbf97..4ff32bb4c205 100644
--- a/drivers/pwm/pwm-microchip-core.c
+++ b/drivers/pwm/pwm-microchip-core.c
@@ -36,7 +36,6 @@
 #include <linux/ktime.h>
 #include <linux/math.h>
 #include <linux/module.h>
-#include <linux/mutex.h>
 #include <linux/of.h>
 #include <linux/platform_device.h>
 #include <linux/pwm.h>
@@ -56,7 +55,6 @@
 struct mchp_core_pwm_chip {
 	struct clk *clk;
 	void __iomem *base;
-	struct mutex lock; /* protects the shared period */
 	ktime_t update_timestamp;
 	u32 sync_update_mask;
 	u16 channel_enabled;
@@ -360,17 +358,10 @@ static int mchp_core_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,
 			       const struct pwm_state *state)
 {
 	struct mchp_core_pwm_chip *mchp_core_pwm = to_mchp_core_pwm(chip);
-	int ret;
-
-	mutex_lock(&mchp_core_pwm->lock);
 
 	mchp_core_pwm_wait_for_sync_update(mchp_core_pwm, pwm->hwpwm);
 
-	ret = mchp_core_pwm_apply_locked(chip, pwm, state);
-
-	mutex_unlock(&mchp_core_pwm->lock);
-
-	return ret;
+	return mchp_core_pwm_apply_locked(chip, pwm, state);
 }
 
 static int mchp_core_pwm_get_state(struct pwm_chip *chip, struct pwm_device *pwm,
@@ -381,8 +372,6 @@ static int mchp_core_pwm_get_state(struct pwm_chip *chip, struct pwm_device *pwm
 	u16 prescale, period_steps;
 	u8 duty_steps, posedge, negedge;
 
-	mutex_lock(&mchp_core_pwm->lock);
-
 	mchp_core_pwm_wait_for_sync_update(mchp_core_pwm, pwm->hwpwm);
 
 	if (mchp_core_pwm->channel_enabled & (1 << pwm->hwpwm))
@@ -415,8 +404,6 @@ static int mchp_core_pwm_get_state(struct pwm_chip *chip, struct pwm_device *pwm
 	posedge = readb_relaxed(mchp_core_pwm->base + MCHPCOREPWM_POSEDGE(pwm->hwpwm));
 	negedge = readb_relaxed(mchp_core_pwm->base + MCHPCOREPWM_NEGEDGE(pwm->hwpwm));
 
-	mutex_unlock(&mchp_core_pwm->lock);
-
 	if (negedge == posedge) {
 		state->duty_cycle = state->period;
 		state->period *= 2;
@@ -469,8 +456,6 @@ static int mchp_core_pwm_probe(struct platform_device *pdev)
 				 &mchp_core_pwm->sync_update_mask))
 		mchp_core_pwm->sync_update_mask = 0;
 
-	mutex_init(&mchp_core_pwm->lock);
-
 	chip->ops = &mchp_core_pwm_ops;
 
 	mchp_core_pwm->channel_enabled = readb_relaxed(mchp_core_pwm->base + MCHPCOREPWM_EN(0));