From patchwork Mon Mar 14 14:16:28 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Uwe_Kleine-K=C3=B6nig?= X-Patchwork-Id: 551132 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D91D8C433F5 for ; Mon, 14 Mar 2022 14:18:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242262AbiCNOTX (ORCPT ); Mon, 14 Mar 2022 10:19:23 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55872 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S242260AbiCNOTV (ORCPT ); Mon, 14 Mar 2022 10:19:21 -0400 Received: from metis.ext.pengutronix.de (metis.ext.pengutronix.de [IPv6:2001:67c:670:201:290:27ff:fe1d:cc33]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AFC6217E2D for ; Mon, 14 Mar 2022 07:18:10 -0700 (PDT) Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1nTlVS-0004zJ-Bp; Mon, 14 Mar 2022 15:17:06 +0100 Received: from [2a0a:edc0:0:900:1d::77] (helo=ptz.office.stw.pengutronix.de) by drehscheibe.grey.stw.pengutronix.de with esmtp (Exim 4.94.2) (envelope-from ) id 1nTlVI-000f2e-6F; Mon, 14 Mar 2022 15:16:54 +0100 Received: from ukl by ptz.office.stw.pengutronix.de with local (Exim 4.94.2) (envelope-from ) id 1nTlVG-0097aY-0z; Mon, 14 Mar 2022 15:16:54 +0100 From: =?utf-8?q?Uwe_Kleine-K=C3=B6nig?= To: Michael Turquette , Stephen Boyd , Russell King , =?utf-8?q?Nuno_S=C3=A1?= , Jean Delvare , Guenter Roeck , Lars Povlsen , Steen Hegelund , UNGLinuxDriver@microchip.com, linux-hwmon@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Lars-Peter Clausen , Michael Hennerich , Jonathan Cameron , Matt Mackall , Herbert Xu , Greg Kroah-Hartman , Linus Walleij , Bartosz Golaszewski , Neil Armstrong , David Airlie , Daniel Vetter , Kevin Hilman , Jerome Brunet , Martin Blumenstingl , Paul Cercueil , Alessandro Zummo , Alexandre Belloni , Wim Van Sebroeck , Claudiu Beznea , Thierry Reding , Lee Jones , Nicolas Ferre , Oleksij Rempel , Shawn Guo , Fabio Estevam , NXP Linux Team , Mark Brown , Vinod Koul Cc: linux-clk@vger.kernel.org, kernel@pengutronix.de, Vladimir Zapolskiy , Heiko Stuebner , Tomislav Denis , Anand Ashok Dumbre , Michal Simek , =?utf-8?q?Andr=C3=A9_Gustavo_Nakago?= =?utf-8?q?mi_Lopez?= , Cai Huoqing , linux-iio@vger.kernel.org, linux-crypto@vger.kernel.org, linux-amlogic@lists.infradead.org, linux-gpio@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-mips@vger.kernel.org, linux-rtc@vger.kernel.org, Keguang Zhang , Andy Gross , Bjorn Andersson , Patrice Chotard , Maxime Coquelin , Alexandre Torgue , Nobuhiro Iwamatsu , linux-watchdog@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-pwm@vger.kernel.org, linux-i2c@vger.kernel.org, linux-spi@vger.kernel.org, Amireddy Mallikarjuna reddy , dmaengine@vger.kernel.org, Jonathan Cameron , Alexandru Ardelean Subject: [PATCH v8 01/16] clk: generalize devm_clk_get() a bit Date: Mon, 14 Mar 2022 15:16:28 +0100 Message-Id: <20220314141643.22184-2-u.kleine-koenig@pengutronix.de> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220314141643.22184-1-u.kleine-koenig@pengutronix.de> References: <20220314141643.22184-1-u.kleine-koenig@pengutronix.de> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=2782; i=uwe@kleine-koenig.org; h=from:subject; bh=R5i2zDoCQJSy1ZUerxZ75D9yH7vs0Yq+WK5mYZohDQQ=; b=owEBbQGS/pANAwAKAcH8FHityuwJAcsmYgBiL03r/FSSSMkN+/sPRSPRmnzWG7n80mxF6W/uPagY Wwq6G3KJATMEAAEKAB0WIQR+cioWkBis/z50pAvB/BR4rcrsCQUCYi9N6wAKCRDB/BR4rcrsCV9PB/ 0Ta+XpJTQdCUjeWsaz8sXPQtyQK6APLzjZjbMmijfMg1ieaLo661ZXlQ8J00dDwFm86jaFSY4bMFT8 kCb+ukClQrRlqBmc6meykJlwPPOzYg7tGDzPrxmdQ7VGGvBFA5K/WpPlbvDdKXelOYAu2aZwBCWbq0 FzgMe0Sh1f0MgOHwnoUeIX/cHA/dbXzDLOwzwlbn5S0v9G9LM7gvadMBgB/z4hNNQfus9Vkl9FekTs bJwETa6zMgveA6AyNUTNmVeD+lAZj1BLCvTzQ2PgRzuzhYXSLbFBv7hMNf2L522++rcuXIAD0es4uA lpqZWzW5CukIzfkUhCS/a5WhswjluT X-Developer-Key: i=uwe@kleine-koenig.org; a=openpgp; fpr=0D2511F322BFAB1C1580266BE2DCDD9132669BD6 X-SA-Exim-Connect-IP: 2a0a:edc0:0:c01:1d::a2 X-SA-Exim-Mail-From: ukl@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-gpio@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org Allow to add an exit hook to devm managed clocks. Also use clk_get_optional() in devm_clk_get_optional instead of open coding it. The generalisation will be used in the next commit to add some more devm_clk helpers. Reviewed-by: Jonathan Cameron Reviewed-by: Alexandru Ardelean Signed-off-by: Uwe Kleine-König Tested-by: Jon Hunter --- drivers/clk/clk-devres.c | 67 ++++++++++++++++++++++++++++++---------- 1 file changed, 50 insertions(+), 17 deletions(-) diff --git a/drivers/clk/clk-devres.c b/drivers/clk/clk-devres.c index f9d5b7334341..fb7761888b30 100644 --- a/drivers/clk/clk-devres.c +++ b/drivers/clk/clk-devres.c @@ -4,39 +4,72 @@ #include #include +struct devm_clk_state { + struct clk *clk; + void (*exit)(struct clk *clk); +}; + static void devm_clk_release(struct device *dev, void *res) { - clk_put(*(struct clk **)res); + struct devm_clk_state *state = *(struct devm_clk_state **)res; + + if (state->exit) + state->exit(state->clk); + + clk_put(state->clk); } -struct clk *devm_clk_get(struct device *dev, const char *id) +static struct clk *__devm_clk_get(struct device *dev, const char *id, + struct clk *(*get)(struct device *dev, const char *id), + int (*init)(struct clk *clk), + void (*exit)(struct clk *clk)) { - struct clk **ptr, *clk; + struct devm_clk_state *state; + struct clk *clk; + int ret; - ptr = devres_alloc(devm_clk_release, sizeof(*ptr), GFP_KERNEL); - if (!ptr) + state = devres_alloc(devm_clk_release, sizeof(*state), GFP_KERNEL); + if (!state) return ERR_PTR(-ENOMEM); - clk = clk_get(dev, id); - if (!IS_ERR(clk)) { - *ptr = clk; - devres_add(dev, ptr); - } else { - devres_free(ptr); + clk = get(dev, id); + if (IS_ERR(clk)) { + ret = PTR_ERR(clk); + goto err_clk_get; } + if (init) { + ret = init(clk); + if (ret) + goto err_clk_init; + } + + state->clk = clk; + state->exit = exit; + + devres_add(dev, state); + return clk; + +err_clk_init: + + clk_put(clk); +err_clk_get: + + devres_free(state); + return ERR_PTR(ret); } -EXPORT_SYMBOL(devm_clk_get); -struct clk *devm_clk_get_optional(struct device *dev, const char *id) +struct clk *devm_clk_get(struct device *dev, const char *id) { - struct clk *clk = devm_clk_get(dev, id); + return __devm_clk_get(dev, id, clk_get, NULL, NULL); - if (clk == ERR_PTR(-ENOENT)) - return NULL; +} +EXPORT_SYMBOL(devm_clk_get); - return clk; +struct clk *devm_clk_get_optional(struct device *dev, const char *id) +{ + return __devm_clk_get(dev, id, clk_get_optional, NULL, NULL); } EXPORT_SYMBOL(devm_clk_get_optional); From patchwork Mon Mar 14 14:16:29 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Uwe_Kleine-K=C3=B6nig?= X-Patchwork-Id: 551131 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C27D4C433F5 for ; Mon, 14 Mar 2022 14:18:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242284AbiCNOT2 (ORCPT ); Mon, 14 Mar 2022 10:19:28 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56040 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S242283AbiCNOTZ (ORCPT ); Mon, 14 Mar 2022 10:19:25 -0400 Received: from metis.ext.pengutronix.de (metis.ext.pengutronix.de [IPv6:2001:67c:670:201:290:27ff:fe1d:cc33]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9E637193DF for ; Mon, 14 Mar 2022 07:18:14 -0700 (PDT) Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1nTlVS-0004zK-Bl; Mon, 14 Mar 2022 15:17:06 +0100 Received: from [2a0a:edc0:0:900:1d::77] (helo=ptz.office.stw.pengutronix.de) by drehscheibe.grey.stw.pengutronix.de with esmtp (Exim 4.94.2) (envelope-from ) id 1nTlVI-000f2h-Bp; Mon, 14 Mar 2022 15:16:55 +0100 Received: from ukl by ptz.office.stw.pengutronix.de with local (Exim 4.94.2) (envelope-from ) id 1nTlVG-0097ab-9N; Mon, 14 Mar 2022 15:16:54 +0100 From: =?utf-8?q?Uwe_Kleine-K=C3=B6nig?= To: Michael Turquette , Stephen Boyd , Russell King , =?utf-8?q?Nuno_S=C3=A1?= , Jean Delvare , Guenter Roeck , Lars Povlsen , Steen Hegelund , UNGLinuxDriver@microchip.com, linux-hwmon@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Lars-Peter Clausen , Michael Hennerich , Jonathan Cameron , Matt Mackall , Herbert Xu , Greg Kroah-Hartman , Linus Walleij , Bartosz Golaszewski , Neil Armstrong , David Airlie , Daniel Vetter , Kevin Hilman , Jerome Brunet , Martin Blumenstingl , Paul Cercueil , Alessandro Zummo , Alexandre Belloni , Wim Van Sebroeck , Claudiu Beznea , Thierry Reding , Lee Jones , Nicolas Ferre , Oleksij Rempel , Shawn Guo , Fabio Estevam , NXP Linux Team , Mark Brown , Vinod Koul Cc: linux-clk@vger.kernel.org, kernel@pengutronix.de, Vladimir Zapolskiy , Heiko Stuebner , Tomislav Denis , Anand Ashok Dumbre , Michal Simek , =?utf-8?q?Andr=C3=A9_Gustavo_Nakago?= =?utf-8?q?mi_Lopez?= , Cai Huoqing , linux-iio@vger.kernel.org, linux-crypto@vger.kernel.org, linux-amlogic@lists.infradead.org, linux-gpio@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-mips@vger.kernel.org, linux-rtc@vger.kernel.org, Keguang Zhang , Andy Gross , Bjorn Andersson , Patrice Chotard , Maxime Coquelin , Alexandre Torgue , Nobuhiro Iwamatsu , linux-watchdog@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-pwm@vger.kernel.org, linux-i2c@vger.kernel.org, linux-spi@vger.kernel.org, Amireddy Mallikarjuna reddy , dmaengine@vger.kernel.org, Jonathan Cameron , Alexandru Ardelean Subject: [PATCH v8 02/16] clk: Provide new devm_clk helpers for prepared and enabled clocks Date: Mon, 14 Mar 2022 15:16:29 +0100 Message-Id: <20220314141643.22184-3-u.kleine-koenig@pengutronix.de> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220314141643.22184-1-u.kleine-koenig@pengutronix.de> References: <20220314141643.22184-1-u.kleine-koenig@pengutronix.de> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=6580; i=uwe@kleine-koenig.org; h=from:subject; bh=jqwSnvDQbBb4RgD/N+2Gw8Lk4ZgGlEcniX5xP+ormpg=; b=owEBbQGS/pANAwAKAcH8FHityuwJAcsmYgBiL03vygZ14+FklBjEtfsr0n5Fj7pM3zCRBT9hjlOo D6x0wfOJATMEAAEKAB0WIQR+cioWkBis/z50pAvB/BR4rcrsCQUCYi9N7wAKCRDB/BR4rcrsCW0OB/ 43XIdPZ3YEVyeJcVZVgIWqjU0WCMAkdNPd+cU39oxeA5WcvEM+r2wINAXO9SjYVP4eV60bVzYVmWWP /4qbeio/xVurdJ7Ut2JGUCHJFu6SPC4ClqX2SoQ/JgYpWKUthuRTck4jK/kt92O+Rx8MXx3VYb58Te WdLCTWqtr7pFF4DaX9T5+yuCky8m4NUbi3kaBeCxn5rVPZlXNv0IEn1k9Xkeb5VWYhGIzPb277tXWL 2BwknXn7RuNCQErT4IAfGPlnO1EMkKZxvhHJ3f5GuCKo9hh7+mqbcb2+7anljvY6nbic3kSBAgO8Kc UpsFmFTmEF329SWkaIlHjE4yXN1sYB X-Developer-Key: i=uwe@kleine-koenig.org; a=openpgp; fpr=0D2511F322BFAB1C1580266BE2DCDD9132669BD6 X-SA-Exim-Connect-IP: 2a0a:edc0:0:c01:1d::a2 X-SA-Exim-Mail-From: ukl@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-gpio@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org When a driver keeps a clock prepared (or enabled) during the whole lifetime of the driver, these helpers allow to simplify the drivers. Reviewed-by: Jonathan Cameron Reviewed-by: Alexandru Ardelean Signed-off-by: Uwe Kleine-König --- drivers/clk/clk-devres.c | 31 ++++++++++++++ include/linux/clk.h | 90 +++++++++++++++++++++++++++++++++++++++- 2 files changed, 120 insertions(+), 1 deletion(-) diff --git a/drivers/clk/clk-devres.c b/drivers/clk/clk-devres.c index fb7761888b30..4707fe718f0b 100644 --- a/drivers/clk/clk-devres.c +++ b/drivers/clk/clk-devres.c @@ -67,12 +67,43 @@ struct clk *devm_clk_get(struct device *dev, const char *id) } EXPORT_SYMBOL(devm_clk_get); +struct clk *devm_clk_get_prepared(struct device *dev, const char *id) +{ + return __devm_clk_get(dev, id, clk_get, clk_prepare, clk_unprepare); + +} +EXPORT_SYMBOL(devm_clk_get_prepared); + +struct clk *devm_clk_get_enabled(struct device *dev, const char *id) +{ + return __devm_clk_get(dev, id, clk_get, + clk_prepare_enable, clk_disable_unprepare); + +} +EXPORT_SYMBOL(devm_clk_get_enabled); + struct clk *devm_clk_get_optional(struct device *dev, const char *id) { return __devm_clk_get(dev, id, clk_get_optional, NULL, NULL); } EXPORT_SYMBOL(devm_clk_get_optional); +struct clk *devm_clk_get_optional_prepared(struct device *dev, const char *id) +{ + return __devm_clk_get(dev, id, clk_get_optional, + clk_prepare, clk_unprepare); + +} +EXPORT_SYMBOL(devm_clk_get_optional_prepared); + +struct clk *devm_clk_get_optional_enabled(struct device *dev, const char *id) +{ + return __devm_clk_get(dev, id, clk_get_optional, + clk_prepare_enable, clk_disable_unprepare); + +} +EXPORT_SYMBOL(devm_clk_get_optional_enabled); + struct clk_bulk_devres { struct clk_bulk_data *clks; int num_clks; diff --git a/include/linux/clk.h b/include/linux/clk.h index 266e8de3cb51..b011dbba7109 100644 --- a/include/linux/clk.h +++ b/include/linux/clk.h @@ -449,7 +449,7 @@ int __must_check devm_clk_bulk_get_all(struct device *dev, * the clock producer. (IOW, @id may be identical strings, but * clk_get may return different clock producers depending on @dev.) * - * Drivers must assume that the clock source is not enabled. + * Drivers must assume that the clock source is neither prepared nor enabled. * * devm_clk_get should not be called from within interrupt context. * @@ -458,6 +458,47 @@ int __must_check devm_clk_bulk_get_all(struct device *dev, */ struct clk *devm_clk_get(struct device *dev, const char *id); +/** + * devm_clk_get_prepared - devm_clk_get() + clk_prepare() + * @dev: device for clock "consumer" + * @id: clock consumer ID + * + * Returns a struct clk corresponding to the clock producer, or + * valid IS_ERR() condition containing errno. The implementation + * uses @dev and @id to determine the clock consumer, and thereby + * the clock producer. (IOW, @id may be identical strings, but + * clk_get may return different clock producers depending on @dev.) + * + * The returned clk (if valid) is prepared. Drivers must however assume that the + * clock is not enabled. + * + * devm_clk_get_prepared should not be called from within interrupt context. + * + * The clock will automatically be unprepared and freed when the + * device is unbound from the bus. + */ +struct clk *devm_clk_get_prepared(struct device *dev, const char *id); + +/** + * devm_clk_get_enabled - devm_clk_get() + clk_prepare_enable() + * @dev: device for clock "consumer" + * @id: clock consumer ID + * + * Returns a struct clk corresponding to the clock producer, or valid IS_ERR() + * condition containing errno. The implementation uses @dev and @id to + * determine the clock consumer, and thereby the clock producer. (IOW, @id may + * be identical strings, but clk_get may return different clock producers + * depending on @dev.) + * + * The returned clk (if valid) is prepared and enabled. + * + * devm_clk_get_prepared should not be called from within interrupt context. + * + * The clock will automatically be disabled, unprepared and freed when the + * device is unbound from the bus. + */ +struct clk *devm_clk_get_enabled(struct device *dev, const char *id); + /** * devm_clk_get_optional - lookup and obtain a managed reference to an optional * clock producer. @@ -469,6 +510,29 @@ struct clk *devm_clk_get(struct device *dev, const char *id); */ struct clk *devm_clk_get_optional(struct device *dev, const char *id); +/** + * devm_clk_get_optional_prepared - devm_clk_get_optional() + clk_prepare() + * @dev: device for clock "consumer" + * @id: clock consumer ID + * + * Behaves the same as devm_clk_get_prepared() except where there is no clock + * producer. In this case, instead of returning -ENOENT, the function returns + * NULL. + */ +struct clk *devm_clk_get_optional_prepared(struct device *dev, const char *id); + +/** + * devm_clk_get_optional_enabled - devm_clk_get_optional() + + * clk_prepare_enable() + * @dev: device for clock "consumer" + * @id: clock consumer ID + * + * Behaves the same as devm_clk_get_enabled() except where there is no clock + * producer. In this case, instead of returning -ENOENT, the function returns + * NULL. + */ +struct clk *devm_clk_get_optional_enabled(struct device *dev, const char *id); + /** * devm_get_clk_from_child - lookup and obtain a managed reference to a * clock producer from child node. @@ -813,12 +877,36 @@ static inline struct clk *devm_clk_get(struct device *dev, const char *id) return NULL; } +static inline struct clk *devm_clk_get_prepared(struct device *dev, + const char *id) +{ + return NULL; +} + +static inline struct clk *devm_clk_get_enabled(struct device *dev, + const char *id) +{ + return NULL; +} + static inline struct clk *devm_clk_get_optional(struct device *dev, const char *id) { return NULL; } +static inline struct clk *devm_clk_get_optional_prepared(struct device *dev, + const char *id) +{ + return NULL; +} + +static inline struct clk *devm_clk_get_optional_enabled(struct device *dev, + const char *id) +{ + return NULL; +} + static inline int __must_check devm_clk_bulk_get(struct device *dev, int num_clks, struct clk_bulk_data *clks) { From patchwork Mon Mar 14 14:16:34 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Uwe_Kleine-K=C3=B6nig?= X-Patchwork-Id: 551514 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 71255C433FE for ; Mon, 14 Mar 2022 14:17:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232623AbiCNOSQ (ORCPT ); Mon, 14 Mar 2022 10:18:16 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54180 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S242222AbiCNOSP (ORCPT ); Mon, 14 Mar 2022 10:18:15 -0400 Received: from metis.ext.pengutronix.de (metis.ext.pengutronix.de [IPv6:2001:67c:670:201:290:27ff:fe1d:cc33]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DF4B719C2B for ; Mon, 14 Mar 2022 07:17:05 -0700 (PDT) Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.ext.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1nTlVL-0004zU-B8; Mon, 14 Mar 2022 15:16:59 +0100 Received: from [2a0a:edc0:0:900:1d::77] (helo=ptz.office.stw.pengutronix.de) by drehscheibe.grey.stw.pengutronix.de with esmtp (Exim 4.94.2) (envelope-from ) id 1nTlVL-000f32-Ji; Mon, 14 Mar 2022 15:16:58 +0100 Received: from ukl by ptz.office.stw.pengutronix.de with local (Exim 4.94.2) (envelope-from ) id 1nTlVJ-0097au-EO; Mon, 14 Mar 2022 15:16:57 +0100 From: =?utf-8?q?Uwe_Kleine-K=C3=B6nig?= To: Michael Turquette , Stephen Boyd , Russell King , Linus Walleij , Bartosz Golaszewski Cc: linux-clk@vger.kernel.org, kernel@pengutronix.de, linux-gpio@vger.kernel.org Subject: [PATCH v8 07/16] gpio: vf610: Simplify error handling in probe Date: Mon, 14 Mar 2022 15:16:34 +0100 Message-Id: <20220314141643.22184-8-u.kleine-koenig@pengutronix.de> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220314141643.22184-1-u.kleine-koenig@pengutronix.de> References: <20220314141643.22184-1-u.kleine-koenig@pengutronix.de> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=2888; i=uwe@kleine-koenig.org; h=from:subject; bh=Dq67GJWI0h4L8WkYxDyaqd3dARkdTA4rj3Fyv3NX2P0=; b=owEBbQGS/pANAwAKAcH8FHityuwJAcsmYgBiL04Apa3/7po70we0OsQEOmgMvEYlPY+6i4PmwzMh LxpdWwWJATMEAAEKAB0WIQR+cioWkBis/z50pAvB/BR4rcrsCQUCYi9OAAAKCRDB/BR4rcrsCe8eCA CFj2DlaWpIHhiwkJiYB+1ZyfgdhiLgqubWRs/HIE+t3YXNpDHSyZb/I6tBwRI5OxljbD8k+FJ56Avy wFjb/SBl9U8A7UhtY75pjmXZ506HahvN0iZar5vJyJ55oY0r3LnhRu1+MoqMvL9Qx5V/dmbuLI+m3B kp7ObVBKp6dmAhIFGDcsBzsoYlONVIKcaGUEl6L1zXW37mh8xUVINmg83RMnsEwfvxX3KHovkOKesZ DXQWx8ymGBDp1FIo4giRJZ9KUq8uOdfILfWXauCbJS59fPUwuil4LBk0121uX79i/9cQ64qOYjWG1O SNFJv+uSKqBdGaxcDCh238ZgAOo6l3 X-Developer-Key: i=uwe@kleine-koenig.org; a=openpgp; fpr=0D2511F322BFAB1C1580266BE2DCDD9132669BD6 X-SA-Exim-Connect-IP: 2a0a:edc0:0:c01:1d::a2 X-SA-Exim-Mail-From: ukl@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-gpio@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org Instead of manually enabling and registering a devm cleanup handler that disables the clock, use devm_clk_get_enabled(). Also replace the handling of the optional clocks by using a variant of clk_get_optional(). The resulting code is a tad stricter than the previous code as errors from clk_get() (apart from -ENOENT) make vf610_gpio_probe() return an error. This is however an improvement. Also make the clock pointers local variables instead of a member of driver data, as they are only used in .probe(). Signed-off-by: Uwe Kleine-König --- drivers/gpio/gpio-vf610.c | 45 +++++++-------------------------------- 1 file changed, 8 insertions(+), 37 deletions(-) diff --git a/drivers/gpio/gpio-vf610.c b/drivers/gpio/gpio-vf610.c index 20780c35da1b..4a6ad2e8d1a1 100644 --- a/drivers/gpio/gpio-vf610.c +++ b/drivers/gpio/gpio-vf610.c @@ -34,8 +34,6 @@ struct vf610_gpio_port { void __iomem *gpio_base; const struct fsl_gpio_soc_data *sdata; u8 irqc[VF610_GPIO_PER_PORT]; - struct clk *clk_port; - struct clk *clk_gpio; int irq; }; @@ -232,11 +230,6 @@ static int vf610_gpio_irq_set_wake(struct irq_data *d, u32 enable) return 0; } -static void vf610_gpio_disable_clk(void *data) -{ - clk_disable_unprepare(data); -} - static int vf610_gpio_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; @@ -245,6 +238,8 @@ static int vf610_gpio_probe(struct platform_device *pdev) struct gpio_chip *gc; struct gpio_irq_chip *girq; struct irq_chip *ic; + struct clk *clk_port; + struct clk *clk_gpio; int i; int ret; @@ -265,37 +260,13 @@ static int vf610_gpio_probe(struct platform_device *pdev) if (port->irq < 0) return port->irq; - port->clk_port = devm_clk_get(dev, "port"); - ret = PTR_ERR_OR_ZERO(port->clk_port); - if (!ret) { - ret = clk_prepare_enable(port->clk_port); - if (ret) - return ret; - ret = devm_add_action_or_reset(dev, vf610_gpio_disable_clk, - port->clk_port); - if (ret) - return ret; - } else if (ret == -EPROBE_DEFER) { - /* - * Percolate deferrals, for anything else, - * just live without the clocking. - */ - return ret; - } + clk_port = devm_clk_get_optional_enabled(dev, "port"); + if (IS_ERR(clk_port)) + return PTR_ERR(clk_port); - port->clk_gpio = devm_clk_get(dev, "gpio"); - ret = PTR_ERR_OR_ZERO(port->clk_gpio); - if (!ret) { - ret = clk_prepare_enable(port->clk_gpio); - if (ret) - return ret; - ret = devm_add_action_or_reset(dev, vf610_gpio_disable_clk, - port->clk_gpio); - if (ret) - return ret; - } else if (ret == -EPROBE_DEFER) { - return ret; - } + clk_gpio = devm_clk_get_optional_enabled(dev, "gpio"); + if (IS_ERR(clk_gpio)) + return PTR_ERR(clk_gpio); gc = &port->gc; gc->parent = dev;