From patchwork Sat Nov 4 21:15:03 2023 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: 13445614 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 72FA9C4332F for ; Sat, 4 Nov 2023 21:16:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230212AbjKDVQC (ORCPT ); Sat, 4 Nov 2023 17:16:02 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52408 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230174AbjKDVQA (ORCPT ); Sat, 4 Nov 2023 17:16:00 -0400 Received: from metis.whiteo.stw.pengutronix.de (metis.whiteo.stw.pengutronix.de [IPv6:2a0a:edc0:2:b01:1d::104]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C5EA3EB for ; Sat, 4 Nov 2023 14:15:57 -0700 (PDT) Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.whiteo.stw.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1qzNza-0007wl-IE; Sat, 04 Nov 2023 22:15:42 +0100 Received: from [2a0a:edc0:0:900:1d::77] (helo=ptz.office.stw.pengutronix.de) by drehscheibe.grey.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1qzNzX-006e14-Sw; Sat, 04 Nov 2023 22:15:39 +0100 Received: from ukl by ptz.office.stw.pengutronix.de with local (Exim 4.94.2) (envelope-from ) id 1qzNzX-00D1an-Jv; Sat, 04 Nov 2023 22:15:39 +0100 From: =?utf-8?q?Uwe_Kleine-K=C3=B6nig?= To: Sebastian Reichel Cc: Nicolas Ferre , Alexandre Belloni , Claudiu Beznea , linux-pm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kernel@pengutronix.de, linux-kbuild@vger.kernel.org Subject: [PATCH 01/14] power: reset: at91-poweroff: Stop using module_platform_driver_probe() Date: Sat, 4 Nov 2023 22:15:03 +0100 Message-ID: <20231104211501.3676352-17-u.kleine-koenig@pengutronix.de> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20231104211501.3676352-16-u.kleine-koenig@pengutronix.de> References: <20231104211501.3676352-16-u.kleine-koenig@pengutronix.de> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=2430; i=u.kleine-koenig@pengutronix.de; h=from:subject; bh=A3GAxdaP9FxnJQ7rdo3LThGc0DGMFeHVPc7hJP55U5Q=; b=owEBbQGS/pANAwAKAY+A+1h9Ev5OAcsmYgBlRrRX2ekh/1qZTC0n2BRRtCK1zpqrxzqdE79Ty O7zSdte1x6JATMEAAEKAB0WIQQ/gaxpOnoeWYmt/tOPgPtYfRL+TgUCZUa0VwAKCRCPgPtYfRL+ TgohB/4ptjt30U5tviUVA9ykdAEiJCC/n+XKyhbI7DvZEqsdM1jiamjhnDbT5HChOF8pkXwThU/ LEFqkDWFI8QcI+dHXz2h8r5s9zHgibuCOappD3TfOTPh6XxTy1rDnqj8kAfy2T0uGRhU89kx0P6 LQL326NRBs3JDvMH9Xl1+jxKexLfzxhj1pAQrDWp7Gy+cNY+kYDma8l5l9Cv1hSmpMH3lQCD0hY pQWiNZylQGRlflUVP2QQoe9qll1RHeIdW9ueCP+3DzQ6B84rPz9GCGbhtu1ncrKJ1CFZb53XPn9 nUxYMBEtDZ9gq9qcdgq3yulGma+tSRJQS6GPi1tjEFTlMO3B X-Developer-Key: i=u.kleine-koenig@pengutronix.de; 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.whiteo.stw.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-kbuild@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kbuild@vger.kernel.org On today's platforms the benefit of platform_driver_probe() isn't that relevant any more. It allows to drop some code after booting (or module loading) for .probe() and discard the .remove() function completely if the driver is built-in. This typically saves a few 100k. The downside of platform_driver_probe() is that the driver cannot be bound and unbound at runtime which is ancient and so slightly complicates testing. There are also thoughts to deprecate platform_driver_probe() because it adds some complexity in the driver core for little gain. Also many drivers don't use it correctly. This driver for example misses to mark the driver struct with __ref which is needed to suppress a (W=1) modpost warning. Signed-off-by: Uwe Kleine-König Reviewed-by: Claudiu Beznea --- drivers/power/reset/at91-poweroff.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/drivers/power/reset/at91-poweroff.c b/drivers/power/reset/at91-poweroff.c index dd5399785b69..83567428ab43 100644 --- a/drivers/power/reset/at91-poweroff.c +++ b/drivers/power/reset/at91-poweroff.c @@ -149,7 +149,7 @@ static void at91_poweroff_dt_set_wakeup_mode(struct platform_device *pdev) writel(wakeup_mode | mode, at91_shdwc.shdwc_base + AT91_SHDW_MR); } -static int __init at91_poweroff_probe(struct platform_device *pdev) +static int at91_poweroff_probe(struct platform_device *pdev) { struct device_node *np; u32 ddr_type; @@ -202,7 +202,7 @@ static int __init at91_poweroff_probe(struct platform_device *pdev) return ret; } -static int __exit at91_poweroff_remove(struct platform_device *pdev) +static int at91_poweroff_remove(struct platform_device *pdev) { if (pm_power_off == at91_poweroff) pm_power_off = NULL; @@ -224,13 +224,14 @@ static const struct of_device_id at91_poweroff_of_match[] = { MODULE_DEVICE_TABLE(of, at91_poweroff_of_match); static struct platform_driver at91_poweroff_driver = { - .remove = __exit_p(at91_poweroff_remove), + .probe = at91_poweroff_probe, + .remove = at91_poweroff_remove, .driver = { .name = "at91-poweroff", .of_match_table = at91_poweroff_of_match, }, }; -module_platform_driver_probe(at91_poweroff_driver, at91_poweroff_probe); +module_platform_driver(at91_poweroff_driver); MODULE_AUTHOR("Atmel Corporation"); MODULE_DESCRIPTION("Shutdown driver for Atmel SoCs"); From patchwork Sat Nov 4 21:15:04 2023 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: 13445613 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 0C9ADC41535 for ; Sat, 4 Nov 2023 21:16:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230138AbjKDVQB (ORCPT ); Sat, 4 Nov 2023 17:16:01 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52396 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230284AbjKDVQA (ORCPT ); Sat, 4 Nov 2023 17:16:00 -0400 Received: from metis.whiteo.stw.pengutronix.de (metis.whiteo.stw.pengutronix.de [IPv6:2a0a:edc0:2:b01:1d::104]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E676ED71 for ; Sat, 4 Nov 2023 14:15:56 -0700 (PDT) Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.whiteo.stw.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1qzNza-0007wm-IE; Sat, 04 Nov 2023 22:15:42 +0100 Received: from [2a0a:edc0:0:900:1d::77] (helo=ptz.office.stw.pengutronix.de) by drehscheibe.grey.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1qzNzY-006e17-55; Sat, 04 Nov 2023 22:15:40 +0100 Received: from ukl by ptz.office.stw.pengutronix.de with local (Exim 4.94.2) (envelope-from ) id 1qzNzX-00D1ar-SF; Sat, 04 Nov 2023 22:15:39 +0100 From: =?utf-8?q?Uwe_Kleine-K=C3=B6nig?= To: Sebastian Reichel Cc: Nicolas Ferre , Alexandre Belloni , Claudiu Beznea , linux-pm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kernel@pengutronix.de, linux-kbuild@vger.kernel.org Subject: [PATCH 02/14] power: reset: at91-reset:: Stop using module_platform_driver_probe() Date: Sat, 4 Nov 2023 22:15:04 +0100 Message-ID: <20231104211501.3676352-18-u.kleine-koenig@pengutronix.de> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20231104211501.3676352-16-u.kleine-koenig@pengutronix.de> References: <20231104211501.3676352-16-u.kleine-koenig@pengutronix.de> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=2325; i=u.kleine-koenig@pengutronix.de; h=from:subject; bh=W8lRBZ3yUwV5kFWyZd9/5kHcgWF/rPGzltu4aD14g1o=; b=owEBbQGS/pANAwAKAY+A+1h9Ev5OAcsmYgBlRrRYymQvOHfodVzwcRCWertvLfogz7aGBheYQ 1WkI05tJCWJATMEAAEKAB0WIQQ/gaxpOnoeWYmt/tOPgPtYfRL+TgUCZUa0WAAKCRCPgPtYfRL+ TvvNB/wKZ0WHQZz9CBCFBmiha3yOJNmxfjag1cOSSWpe2KT8nDL7OLZNoGv91LYSe+TqaMV9z1H gOYIltEwIh6KgU4ht4CUsUx6mLUgZygelv8VpsAoXidiDlHPTZZA8XK+Ke5kzqjE5cUpFBJttwV EHm0xoz4lr6FKXa4B3cBP25MUihfdWVFzZDnTJYR74ExSIy9/2irtmj/eUZuMKVMIU0wW82/pZd ZvfbIH3IUYyaBHWUCT5IaKJ9998XVfo+uGs97xiXxAqmRgpKoeKWQuBC/0qfwoE6cyhrtsHKEF9 j3nW3JG8XaS69ZUEuFoAeH9vLuOhAg+nhKeNysxEcumnsI+k X-Developer-Key: i=u.kleine-koenig@pengutronix.de; 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.whiteo.stw.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-kbuild@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kbuild@vger.kernel.org On today's platforms the benefit of platform_driver_probe() isn't that relevant any more. It allows to drop some code after booting (or module loading) for .probe() and discard the .remove() function completely if the driver is built-in. This typically saves a few 100k. The downside of platform_driver_probe() is that the driver cannot be bound and unbound at runtime which is ancient and so slightly complicates testing. There are also thoughts to deprecate platform_driver_probe() because it adds some complexity in the driver core for little gain. Also many drivers don't use it correctly. This driver for example misses to mark the driver struct with __ref which is needed to suppress a (W=1) modpost warning. Signed-off-by: Uwe Kleine-König Reviewed-by: Claudiu Beznea --- drivers/power/reset/at91-reset.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/drivers/power/reset/at91-reset.c b/drivers/power/reset/at91-reset.c index aa9b012d3d00..af85f2f929ba 100644 --- a/drivers/power/reset/at91-reset.c +++ b/drivers/power/reset/at91-reset.c @@ -337,7 +337,7 @@ static int at91_rcdev_init(struct at91_reset *reset, return devm_reset_controller_register(&pdev->dev, &reset->rcdev); } -static int __init at91_reset_probe(struct platform_device *pdev) +static int at91_reset_probe(struct platform_device *pdev) { const struct of_device_id *match; struct at91_reset *reset; @@ -417,7 +417,7 @@ static int __init at91_reset_probe(struct platform_device *pdev) return ret; } -static int __exit at91_reset_remove(struct platform_device *pdev) +static int at91_reset_remove(struct platform_device *pdev) { struct at91_reset *reset = platform_get_drvdata(pdev); @@ -428,13 +428,14 @@ static int __exit at91_reset_remove(struct platform_device *pdev) } static struct platform_driver at91_reset_driver = { - .remove = __exit_p(at91_reset_remove), + .probe = at91_reset_probe, + .remove = at91_reset_remove, .driver = { .name = "at91-reset", .of_match_table = at91_reset_of_match, }, }; -module_platform_driver_probe(at91_reset_driver, at91_reset_probe); +module_platform_driver(at91_reset_driver); MODULE_AUTHOR("Atmel Corporation"); MODULE_DESCRIPTION("Reset driver for Atmel SoCs"); From patchwork Sat Nov 4 21:15:05 2023 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: 13445612 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 4BA14C001B0 for ; Sat, 4 Nov 2023 21:16:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230299AbjKDVQB (ORCPT ); Sat, 4 Nov 2023 17:16:01 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52380 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230273AbjKDVQA (ORCPT ); Sat, 4 Nov 2023 17:16:00 -0400 Received: from metis.whiteo.stw.pengutronix.de (metis.whiteo.stw.pengutronix.de [IPv6:2a0a:edc0:2:b01:1d::104]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9BED8D6F for ; Sat, 4 Nov 2023 14:15:56 -0700 (PDT) Received: from drehscheibe.grey.stw.pengutronix.de ([2a0a:edc0:0:c01:1d::a2]) by metis.whiteo.stw.pengutronix.de with esmtps (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1qzNza-0007wn-IF; Sat, 04 Nov 2023 22:15:42 +0100 Received: from [2a0a:edc0:0:900:1d::77] (helo=ptz.office.stw.pengutronix.de) by drehscheibe.grey.stw.pengutronix.de with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1qzNzY-006e1A-BU; Sat, 04 Nov 2023 22:15:40 +0100 Received: from ukl by ptz.office.stw.pengutronix.de with local (Exim 4.94.2) (envelope-from ) id 1qzNzY-00D1av-2F; Sat, 04 Nov 2023 22:15:40 +0100 From: =?utf-8?q?Uwe_Kleine-K=C3=B6nig?= To: Sebastian Reichel Cc: Claudiu Beznea , Nicolas Ferre , Alexandre Belloni , linux-pm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kernel@pengutronix.de, linux-kbuild@vger.kernel.org Subject: [PATCH 03/14] power: reset: at91-sama5d2_shdwc: Stop using module_platform_driver_probe() Date: Sat, 4 Nov 2023 22:15:05 +0100 Message-ID: <20231104211501.3676352-19-u.kleine-koenig@pengutronix.de> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20231104211501.3676352-16-u.kleine-koenig@pengutronix.de> References: <20231104211501.3676352-16-u.kleine-koenig@pengutronix.de> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=2338; i=u.kleine-koenig@pengutronix.de; h=from:subject; bh=CzfLFzFhdKZJS53HV7olnleoDV2ECmztZSZ0hXx6qvU=; b=owEBbQGS/pANAwAKAY+A+1h9Ev5OAcsmYgBlRrRZvSUmVm+Ux2DDRAvxRKgCWmH6x9Tx/AWBs S3Mcf5rWu6JATMEAAEKAB0WIQQ/gaxpOnoeWYmt/tOPgPtYfRL+TgUCZUa0WQAKCRCPgPtYfRL+ Tld8CACz7r9Zk4EtBHkBDdUVbuoeGgQPmN5+wiA8GgVpHuG7h7S5CNtvi59p2VYTke10Ooq0I3C mf4ZDqQ5I7hm4Htbb7EMc8AtBPljMUsPG/JTKAaxtqkPvt0pIzRpyPGzluwNStGHG4UOzv4puLq o1AzzH6ryb4UyP4qXcbKmdFGrZgnIulWB6F3ZK6vvUdMJjIiCK6Iaf7cw1SEtJLthS0Sqke39+/ SJAZZuMnLz/w+/93LjfPVhYUv+sXK9Vu6XqaPCR5nN3UDJTTjxGy9D9WXqC7rk6olJry5SjGzo6 FLXYgDeBqndSVhrWg7wEVZPcWyj7x2kdAn4glugVboSEkxXk X-Developer-Key: i=u.kleine-koenig@pengutronix.de; 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.whiteo.stw.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-kbuild@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kbuild@vger.kernel.org On today's platforms the benefit of platform_driver_probe() isn't that relevant any more. It allows to drop some code after booting (or module loading) for .probe() and discard the .remove() function completely if the driver is built-in. This typically saves a few 100k. The downside of platform_driver_probe() is that the driver cannot be bound and unbound at runtime which is ancient and so slightly complicates testing. There are also thoughts to deprecate platform_driver_probe() because it adds some complexity in the driver core for little gain. Also many drivers don't use it correctly. This driver for example misses to mark the driver struct with __ref which is needed to suppress a (W=1) modpost warning. Signed-off-by: Uwe Kleine-König Reviewed-by: Claudiu Beznea --- drivers/power/reset/at91-sama5d2_shdwc.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/drivers/power/reset/at91-sama5d2_shdwc.c b/drivers/power/reset/at91-sama5d2_shdwc.c index e76b102b57b1..ef8add623363 100644 --- a/drivers/power/reset/at91-sama5d2_shdwc.c +++ b/drivers/power/reset/at91-sama5d2_shdwc.c @@ -329,7 +329,7 @@ static const struct of_device_id at91_pmc_ids[] = { { /* Sentinel. */ } }; -static int __init at91_shdwc_probe(struct platform_device *pdev) +static int at91_shdwc_probe(struct platform_device *pdev) { const struct of_device_id *match; struct device_node *np; @@ -421,7 +421,7 @@ static int __init at91_shdwc_probe(struct platform_device *pdev) return ret; } -static int __exit at91_shdwc_remove(struct platform_device *pdev) +static int at91_shdwc_remove(struct platform_device *pdev) { struct shdwc *shdw = platform_get_drvdata(pdev); @@ -442,13 +442,14 @@ static int __exit at91_shdwc_remove(struct platform_device *pdev) } static struct platform_driver at91_shdwc_driver = { - .remove = __exit_p(at91_shdwc_remove), + .probe = at91_shdwc_probe, + .remove = at91_shdwc_remove, .driver = { .name = "at91-shdwc", .of_match_table = at91_shdwc_of_match, }, }; -module_platform_driver_probe(at91_shdwc_driver, at91_shdwc_probe); +module_platform_driver(at91_shdwc_driver); MODULE_AUTHOR("Nicolas Ferre "); MODULE_DESCRIPTION("Atmel shutdown controller driver");