linux-kernel - [PATCH 4/8] pwm: Export pwm_get_state

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Message-Id: <20240815-ad7606_add_iio_backend_support-v1-4-cea3e11b1aa4@baylibre.com>
Date: Thu, 15 Aug 2024 12:11:58 +0000
From: Guillaume Stols <gstols@...libre.com>
To: Uwe Kleine-König <ukleinek@...nel.org>, 
 Lars-Peter Clausen <lars@...afoo.de>, 
 Michael Hennerich <Michael.Hennerich@...log.com>, 
 Jonathan Cameron <jic23@...nel.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, 
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 
 "Rafael J. Wysocki" <rafael@...nel.org>, Jonathan Corbet <corbet@....net>
Cc: linux-pwm@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Michael Hennerich <michael.hennerich@...log.com>, 
 linux-fbdev@...r.kernel.org, linux-iio@...r.kernel.org, 
 devicetree@...r.kernel.org, linux-doc@...r.kernel.org, 
 Guillaume Stols <gstols@...libre.com>, 
 20240705211452.1157967-2-u.kleine-koenig@...libre.com, 
 20240712171821.1470833-2-u.kleine-koenig@...libre.com, 
 cover.1721040875.git.u.kleine-koenig@...libre.com, aardelean@...libre.com
Subject: [PATCH 4/8] pwm: Export pwm_get_state_hw

This function can be used in some other drivers, for instance when we
want to retrieve the real frequency vs the one that was asked.

Signed-off-by: Guillaume Stols <gstols@...libre.com>
---
 drivers/pwm/core.c  | 3 ++-
 include/linux/pwm.h | 1 +
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/pwm/core.c b/drivers/pwm/core.c
index 21fca27bb8a3..82e05ed88310 100644
--- a/drivers/pwm/core.c
+++ b/drivers/pwm/core.c
@@ -651,7 +651,7 @@ int pwm_apply_atomic(struct pwm_device *pwm, const struct pwm_state *state)
 }
 EXPORT_SYMBOL_GPL(pwm_apply_atomic);

-static int pwm_get_state_hw(struct pwm_device *pwm, struct pwm_state *state)
+int pwm_get_state_hw(struct pwm_device *pwm, struct pwm_state *state)
 {
 	struct pwm_chip *chip = pwm->chip;
 	const struct pwm_ops *ops = chip->ops;
@@ -685,6 +685,7 @@ static int pwm_get_state_hw(struct pwm_device *pwm, struct pwm_state *state)

 	return ret;
 }
+EXPORT_SYMBOL_GPL(pwm_get_state_hw);

 /**
  * pwm_adjust_config() - adjust the current PWM config to the PWM arguments
diff --git a/include/linux/pwm.h b/include/linux/pwm.h
index fd100c27f109..d48ea3051e28 100644
--- a/include/linux/pwm.h
+++ b/include/linux/pwm.h
@@ -369,6 +369,7 @@ int pwm_apply_might_sleep(struct pwm_device *pwm, const struct pwm_state *state)
 int pwm_apply_atomic(struct pwm_device *pwm, const struct pwm_state *state);
 int pwm_adjust_config(struct pwm_device *pwm);

+int pwm_get_state_hw(struct pwm_device *pwm, struct pwm_state *state);
 /**
  * pwm_config() - change a PWM device configuration
  * @pwm: PWM device

-- 
2.34.1