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[2001:14ba:16f3:4a00::1]) by smtp.gmail.com with ESMTPSA id q14-20020ac2528e000000b0049480c69d98sm386790lfm.239.2022.09.21.04.42.36 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 21 Sep 2022 04:42:37 -0700 (PDT) Date: Wed, 21 Sep 2022 14:42:29 +0300 From: Matti Vaittinen To: Matti Vaittinen , Matti Vaittinen Cc: Jonathan Cameron , Lars-Peter Clausen , Rob Herring , Krzysztof Kozlowski , Matti Vaittinen , Andy Shevchenko , Nikita Yushchenko , Cosmin Tanislav , Jagath Jog J , linux-iio@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [RFC PATCH 1/5] regulator: Add devm helpers for get and enable Message-ID: References: MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="WG2BA4DezQcfEiTc" Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --WG2BA4DezQcfEiTc Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable A few regulator consumer drivers seem to be just getting a regulator, enabling it and registering a devm-action to disable the regulator at the driver detach and then forget about it. We can simplify this a bit by adding a devm-helper for this pattern. Add devm_regulator_get_enable() and devm_regulator_get_enable_optional() Signed-off-by: Matti Vaittinen (cherry picked from commit b6058e052b842a19c8bb639798d8692cd0e7589f) --- Please note - this patch is already in Mark's tree. It's here just to allow compilation of the series on top of v6.0-rc4 drivers/regulator/devres.c | 59 ++++++++++++++++++++++++++++++ include/linux/regulator/consumer.h | 13 +++++++ 2 files changed, 72 insertions(+) diff --git a/drivers/regulator/devres.c b/drivers/regulator/devres.c index 32823a87fd40..3cb3eb49ad8a 100644 --- a/drivers/regulator/devres.c +++ b/drivers/regulator/devres.c @@ -70,6 +70,65 @@ struct regulator *devm_regulator_get_exclusive(struct de= vice *dev, } EXPORT_SYMBOL_GPL(devm_regulator_get_exclusive); =20 +static void regulator_action_disable(void *d) +{ + struct regulator *r =3D (struct regulator *)d; + + regulator_disable(r); +} + +static int _devm_regulator_get_enable(struct device *dev, const char *id, + int get_type) +{ + struct regulator *r; + int ret; + + r =3D _devm_regulator_get(dev, id, get_type); + if (IS_ERR(r)) + return PTR_ERR(r); + + ret =3D regulator_enable(r); + if (!ret) + ret =3D devm_add_action_or_reset(dev, ®ulator_action_disable, r); + + if (ret) + devm_regulator_put(r); + + return ret; +} + +/** + * devm_regulator_get_enable_optional - Resource managed regulator get and= enable + * @dev: device to supply + * @id: supply name or regulator ID. + * + * Get and enable regulator for duration of the device life-time. + * regulator_disable() and regulator_put() are automatically called on dri= ver + * detach. See regulator_get_optional() and regulator_enable() for more + * information. + */ +int devm_regulator_get_enable_optional(struct device *dev, const char *id) +{ + return _devm_regulator_get_enable(dev, id, OPTIONAL_GET); +} +EXPORT_SYMBOL_GPL(devm_regulator_get_enable_optional); + +/** + * devm_regulator_get_enable - Resource managed regulator get and enable + * @dev: device to supply + * @id: supply name or regulator ID. + * + * Get and enable regulator for duration of the device life-time. + * regulator_disable() and regulator_put() are automatically called on dri= ver + * detach. See regulator_get() and regulator_enable() for more + * information. + */ +int devm_regulator_get_enable(struct device *dev, const char *id) +{ + return _devm_regulator_get_enable(dev, id, NORMAL_GET); +} +EXPORT_SYMBOL_GPL(devm_regulator_get_enable); + /** * devm_regulator_get_optional - Resource managed regulator_get_optional() * @dev: device to supply diff --git a/include/linux/regulator/consumer.h b/include/linux/regulator/c= onsumer.h index bc6cda706d1f..8e6cf65851b0 100644 --- a/include/linux/regulator/consumer.h +++ b/include/linux/regulator/consumer.h @@ -207,6 +207,8 @@ struct regulator *__must_check regulator_get_optional(s= truct device *dev, const char *id); struct regulator *__must_check devm_regulator_get_optional(struct device *= dev, const char *id); +int devm_regulator_get_enable(struct device *dev, const char *id); +int devm_regulator_get_enable_optional(struct device *dev, const char *id); void regulator_put(struct regulator *regulator); void devm_regulator_put(struct regulator *regulator); =20 @@ -354,6 +356,17 @@ devm_regulator_get_exclusive(struct device *dev, const= char *id) return ERR_PTR(-ENODEV); } =20 +static inline int devm_regulator_get_enable(struct device *dev, const char= *id) +{ + return -ENODEV; +} + +static inline int devm_regulator_get_enable_optional(struct device *dev, + const char *id) +{ + return -ENODEV; +} + static inline struct regulator *__must_check regulator_get_optional(struct device *dev, const char *id) { --=20 2.37.1 --=20 Matti Vaittinen, Linux device drivers ROHM Semiconductors, Finland SWDC Kiviharjunlenkki 1E 90220 OULU FINLAND ~~~ "I don't think so," said Rene Descartes. Just then he vanished ~~~ Simon says - in Latin please. ~~~ "non cogito me" dixit Rene Descarte, deinde evanescavit ~~~ Thanks to Simon Glass for the translation =3D]=20 --WG2BA4DezQcfEiTc Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEEIx+f8wZb28fLKEhTeFA3/03aocUFAmMq+KUACgkQeFA3/03a ocV0BAf/Y8762HwibCYMTHCX3U2ZbIEvJreF8qLtUc5ai94BnZ7bMVkb1/3pUNT1 pwx4uLyH7l0V1HQPZzDLtZS+jw41UlV5I8qKekScV+ojZcHxcYB/640lhnRMD2VL CnrpuSfi4aEN1Y1lkmDXSusZ1CJah6JawRkohoBtFnJ/pDFQISlqR5B/znJC5rW2 kp4NtQXVewoV+sJUNR4ca3RJu2zGsVShRxXRN3dRgEWWoZPB5dL4XSzZNzNpbidY elFk4xjDqzS5+1TLLoK60GzLyod5zceDvlgDAs6XqG7My6gxpnlHs0Mb/nOvncrP GhlwGhSco8CdBSiY6WQufiz9QFvbKw== =u3OX -----END PGP SIGNATURE----- --WG2BA4DezQcfEiTc--