From bcda91bf86c1ff7647df85029d69f2aed80f210e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= <u.kleine-koenig@pengutronix.de>
Date: Wed, 7 Apr 2021 10:01:54 +0200
Subject: [PATCH] pwm: Add a device-managed function to add PWM chips
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This potentially simplifies low-level PWM drivers.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
---
drivers/pwm/core.c | 19 +++++++++++++++++++
include/linux/pwm.h | 3 +++
2 files changed, 22 insertions(+)
diff --git a/drivers/pwm/core.c b/drivers/pwm/core.c
index a42999f877d25..83db178f16bb7 100644
--- a/drivers/pwm/core.c
+++ b/drivers/pwm/core.c
@@ -335,6 +335,25 @@ int pwmchip_remove(struct pwm_chip *chip)
}
EXPORT_SYMBOL_GPL(pwmchip_remove);
+static void devm_pwmchip_remove(void *data)
+{
+ struct pwm_chip *chip = data;
+
+ pwmchip_remove(chip);
+}
+
+int devm_pwmchip_add(struct device *dev, struct pwm_chip *chip)
+{
+ int ret;
+
+ ret = pwmchip_add(chip);
+ if (ret)
+ return ret;
+
+ return devm_add_action_or_reset(dev, devm_pwmchip_remove, chip);
+}
+EXPORT_SYMBOL_GPL(devm_pwmchip_add);
+
/**
* pwm_request() - request a PWM device
* @pwm: global PWM device index
diff --git a/include/linux/pwm.h b/include/linux/pwm.h
index 5a73251d28e3f..892ece4d4cfab 100644
--- a/include/linux/pwm.h
+++ b/include/linux/pwm.h
@@ -405,6 +405,9 @@ void *pwm_get_chip_data(struct pwm_device *pwm);
int pwmchip_add(struct pwm_chip *chip);
int pwmchip_remove(struct pwm_chip *chip);
+
+int devm_pwmchip_add(struct device *dev, struct pwm_chip *chip);
+
struct pwm_device *pwm_request_from_chip(struct pwm_chip *chip,
unsigned int index,
const char *label);