From patchwork Sun Jun 30 16:53:04 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefan Wahren X-Patchwork-Id: 13717243 Received: from mout.gmx.net (mout.gmx.net [212.227.17.22]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5842413CFB8; Sun, 30 Jun 2024 16:53:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=212.227.17.22 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1719766442; cv=none; b=KbzySNF46Z8iiIitffMi+0+klZSaTUff/zO2A/xOM9COaZJf1EyTTiUUThCN+msIrkV/Hb0mGA4SROPX6KqTE2q6qKfCiO/ptTdYMmp9FojTuYQClEudD1VcCzSgeI2aiDRRymztPba9Fbe4fl9zG7kv9VUiTafqAgkVCFVCk6k= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1719766442; c=relaxed/simple; bh=IDz8sfG2rJ2XDtyV9KlADYXg9I6EzDZ4IZkpSVQew7o=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; 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b=co+khgJLL3I35VMjh/AKMVnmw3JPmoSsHTQRnoawNenZfKo4FyiEzMwGWe1Sy5ww hR6AIrhO3oh4hFkXrLHHIVlDKTHomfo+fUc9AghNyCeJ9vhJOlIY+y4cEWcsYXoKN jJbugRnYLl3ly/aZKQDKzTEYtRCDlHfOntQcuuyl6f5rbhfgOLi8pvDqJomIT+rIN rFJ0n/l1jY4QzzL+QQQYkR7VMcTigBfxsxmffxDjXVcLlK1pXB6B2Ap5yPDs1pt6O gxTquMIZsvzELOGK3xlLE2qJiFGQqMyLJs8dMXlWkq+zpeE2nf/ZQnNSWhPr3O/q8 73J0RYsy35yFwRUTzw== X-UI-Sender-Class: 724b4f7f-cbec-4199-ad4e-598c01a50d3a Received: from stefanw-SCHENKER ([37.4.248.43]) by mail.gmx.net (mrgmx104 [212.227.17.168]) with ESMTPSA (Nemesis) id 1M3lcJ-1sOEv12IFf-002P3U; Sun, 30 Jun 2024 18:53:24 +0200 From: Stefan Wahren To: Greg Kroah-Hartman , Florian Fainelli , Ray Jui , Scott Branden , Maxime Ripard , Thomas Gleixner , Jassi Brar , Ulf Hansson , Jiri Slaby , Minas Harutyunyan Cc: Dave Stevenson , Maarten Lankhorst , Thomas Zimmermann , David Airlie , Daniel Vetter , Lukas Wunner , Peter Robinson , dri-devel@lists.freedesktop.org, bcm-kernel-feedback-list@broadcom.com, linux-pm@vger.kernel.org, linux-serial@vger.kernel.org, linux-usb@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kernel-list@raspberrypi.com, Stefan Wahren Subject: [PATCH RFT 10/11] serial: 8250_bcm2835aux: add PM suspend/resume support Date: Sun, 30 Jun 2024 18:53:04 +0200 Message-Id: <20240630165304.323095-1-wahrenst@gmx.net> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240630153652.318882-1-wahrenst@gmx.net> References: <20240630153652.318882-1-wahrenst@gmx.net> Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Provags-ID: V03:K1:4gFUJsAqzBEe0Ecm192F+EOC5bzkfojzIoxo17BhwwQMZSUayGA aoHR3ququVF0cAZgp0qNUz+67nJI3An977H1iEQn0dvfqUUSZAkNJd0Cge4khmOjgHPODAW 3fxZ+TBPZSHDWvrKdOb4YOn8Fkz6nb9woQGsYOtRjr1UmI7SgLZLatvKan1jOGJjZvJFbI6 7huOwk+6E0lfTHXsikFhg== X-Spam-Flag: NO UI-OutboundReport: notjunk:1;M01:P0:RC+tt6aEpOI=;1EW8hiWdl4BGJhJ4wQfv5AMukc5 ZEeVMD/okghGbmPzVHi0APqS3iWRMF1wKmhloRCbelkkAJn1Sm/Vvn98lJFrOzCO8urP9Ygwf gTGkYWjIAoUo8NoZxBxrnGWJ0joi+LCicWuTtMarXVr9yCRFBjr+kbHObjc/yjO+7UKcTz3WZ 0py2ifYsEsJaE/bLO/eRuYgiAQOP6nNhG0gb0vuEwzd5k7VA+lZ0FmqdBtIj5CAI4KqwGpxSb Jyfyb6rmrTvDA9fC59hAa8gIXjwklPT087BiLt5G4Fgv5w1vimzAwe/IoKJbOCSSzGKUhnvVJ XHyjbnG5Pd8CEJzi7YHIxwgNJj57kAYuki3Xkdij4zXwkXmWFKaCPpL/SJJ7gkJAsnGQgKmkF poizMB35wx89493MKT/E+8eV4pOz2sVuvfjBHdNtc1SeeMnVCYrzw+2TIm1ZpTTRixdX4pbuE VUZQl2RvlJXPD1tjKhRxKik0gCjl/T5Hk1YBLRr1c9fwlU0pXl3VhEGLxbcVNEJruDnfezGtQ iqOhszlDM/1ldUPLzejAS8R5LT5rqeIu9FYPuU1okh2BR9ub3faug8JzYAG6IsomotgU2Zmpd ATf0m6AoTiMqz1pzNBy4tvJAdviKXJxbJT56dx1kr+uMEGFpvVI4j2+wce8zFCDtlv/csnJ4h eKP62EVipAK/KdjNrNwXfDPhTxngwEcTpbIrC+pvGnEjeXWTPjYQcTniJfZZ+dDMVzN9cupV4 54a+7MHBLu69HLRnHUiGt6VepISknaHu2CTqbxPxaV8jqRQgv6KmwFuGunm9LdtKqTKcvsbW8 2ku5nTDp+OHzRjSaFTyFL3dYB3fj1Xy2+wJgUs1cWGQnE= This adds suspend/resume support for the 8250_bcm2835aux driver to provide power management support on attached devices. Signed-off-by: Stefan Wahren --- Since i don't have a RS485 setup, any test feedback would be great. drivers/tty/serial/8250/8250_bcm2835aux.c | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) -- 2.34.1 diff --git a/drivers/tty/serial/8250/8250_bcm2835aux.c b/drivers/tty/serial/8250/8250_bcm2835aux.c index 121a5ce86050..cccd2a09cb6f 100644 --- a/drivers/tty/serial/8250/8250_bcm2835aux.c +++ b/drivers/tty/serial/8250/8250_bcm2835aux.c @@ -213,11 +213,34 @@ static const struct acpi_device_id bcm2835aux_serial_acpi_match[] = { }; MODULE_DEVICE_TABLE(acpi, bcm2835aux_serial_acpi_match); +static int __maybe_unused bcm2835aux_suspend(struct device *dev) +{ + struct bcm2835aux_data *data = dev_get_drvdata(dev); + + serial8250_suspend_port(data->line); + + return 0; +} + +static int __maybe_unused bcm2835aux_resume(struct device *dev) +{ + struct bcm2835aux_data *data = dev_get_drvdata(dev); + + serial8250_resume_port(data->line); + + return 0; +} + +static const struct dev_pm_ops bcm2835aux_dev_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(bcm2835aux_suspend, bcm2835aux_resume) +}; + static struct platform_driver bcm2835aux_serial_driver = { .driver = { .name = "bcm2835-aux-uart", .of_match_table = bcm2835aux_serial_match, .acpi_match_table = bcm2835aux_serial_acpi_match, + .pm = &bcm2835aux_dev_pm_ops, }, .probe = bcm2835aux_serial_probe, .remove_new = bcm2835aux_serial_remove,