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: 12780192 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 CE3EFC433EF for ; Mon, 14 Mar 2022 14:18:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242277AbiCNOT1 (ORCPT ); Mon, 14 Mar 2022 10:19:27 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56094 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S242287AbiCNOT0 (ORCPT ); Mon, 14 Mar 2022 10:19:26 -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 91ED719C35 for ; Mon, 14 Mar 2022 07:18:16 -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-watchdog@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-watchdog@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);