From patchwork Sun Jul 28 13:00:28 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefan Wahren X-Patchwork-Id: 815241 Received: from mout.gmx.net (mout.gmx.net [212.227.15.18]) (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 D54D754765; Sun, 28 Jul 2024 13:07:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=212.227.15.18 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722172051; cv=none; b=BNJeS0p7ZNpUG/YJzby1SpgkEY5IgqCjfhk9AImBs9DRRo1ZDFq2NnAzo2mK+pZ8fZ4C1isH0mDP1Otqce0JvTU46rYROIoKE+Q96yyUTQsCBCBLbYWyvje7SNuC/7tLaEbhjrEBS2+WJN8R9cts2kr0BAKXM3h4Gg/XXVJw3K4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1722172051; c=relaxed/simple; bh=pVXHlnRu0F/n3FhLK5MBcvB0BkcNyDZOXRztm2fZhkE=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; 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b=QDu0TYVGIrPPyHtkJcQPWt73BzzQw/56JyxEUV3i8Y2b0XaWlB4ELwwR4ReERlUQ J9CiHgKyRAHg/VzyFwOnPR5HSPd09O16rDNaYHGgfS3dl79Us+RPi/+D3LdgT9Jkz 9NKtQbS2w+LST9mJ455A1rJo2k6gWRf6faRSBYkVFmAgjexMqzlaQNyvDCmMiPggI 3GByP4Qdmg/N9hw5o8D0t+QYvOD0+6qXiA5MepPuLFc/xkdoGd/k4x3LTO3kW2i1c rAwSQTPQ89zHPLPX8T7I9J1SD2A3ain0Z2e1f9PaCpRuvkt5SN2KnVDAbr2RdYjvJ 2x+7iu8Pm8yKSMrgvA== X-UI-Sender-Class: 724b4f7f-cbec-4199-ad4e-598c01a50d3a Received: from stefanw-SCHENKER ([37.4.248.43]) by mail.gmx.net (mrgmx004 [212.227.17.190]) with ESMTPSA (Nemesis) id 1MdefD-1rzH1l2kef-00m7eG; Sun, 28 Jul 2024 15:07:04 +0200 From: Stefan Wahren To: Greg Kroah-Hartman , Florian Fainelli , Ray Jui , Scott Branden , Maxime Ripard , Jassi Brar , Ulf Hansson , =?utf-8?q?Ma=C3=ADra_Canal?= , Jiri Slaby , Minas Harutyunyan Cc: Dave Stevenson , Maarten Lankhorst , Thomas Zimmermann , David Airlie , Daniel Vetter , Lukas Wunner , Artur Petrosyan , 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 V2 15/16] serial: 8250_bcm2835aux: add PM suspend/resume support Date: Sun, 28 Jul 2024 15:00:28 +0200 Message-Id: <20240728130029.78279-7-wahrenst@gmx.net> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20240728130029.78279-1-wahrenst@gmx.net> References: <20240728114200.75559-1-wahrenst@gmx.net> <20240728130029.78279-1-wahrenst@gmx.net> Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Provags-ID: V03:K1:LKpSEPBrxgSGKl6p0VVGDEip1oTMqhxgsWGVipZOkXwOdbvhctH 6hEsO2jq8rWwq+RqQ630dUH3ZPlgcT9Uu47UQTvOeCIZKQz+iXuZx4UTP0bTmx73wwiGAfG d1SHscW4D2Rpb9HtCqCZZRlWNxjyPNpPOdQXT5zBx4FvWCmABwh1z7UX0CGyizy9SS49CiX XFcEdtxmXcwvvDrEL2yLg== X-Spam-Flag: NO UI-OutboundReport: notjunk:1;M01:P0:JDg6C/dfUsw=;t/v0ogfId+qldYXoGuQjDQ9jqLV RfHJ/ghd4m4Axjtezz6w/Eg2GjBGrYjzWQfJa2ENJqK28/akFew3t80Nn24Roo3hU10VETT6t Y5+XtfO9+XEaJVEnBSx+iFOJ5SBmX1KJ42j6L18719CqrqwgJdZYmORLs+P12B+uEZGSFR2Wg swaqQinhsvxQGSeuEFJuQFfkOesC0jg8nHiO4D5HVUgPrthiRwe3lHfXMO1spiagZTU20/jC0 lhgWieXMQrcuTVyWnhNUXxY21uNTxqpB5YoT7hWCZQSoknkZGlyFKYmKYfThQmkc9KXKqafAG Wn/xPh5mhKMSOUbjUNa1FAgSNfuxuUmpw5OjzbleppitCkoXt+bgVxAP2RcyK9BcZsqQJGi6H v9O2HIE0Naeu+J/v+wTO4DhJKy97QdhdYeGwkfuzXxqcIXt0FfKt/ZhUWK1rk7Pb6hTGLYSUB cjpZ9+ytf/Hw3+fKBKVIB0nU6VB1YVRH7BdCHln94DGX6ehgvnxJRRGZzZUEtyndQN7N3GaGC vKsrEQus5zi4Ha06BMgnOboN2jlZzdgfMdmZXSlEZiFdcAkS++sFR+gQK0FfjE2c7vcxpGiU2 CKdzSDG9d4PX87a/VVPbdBo35awLp0DB8u8jMTezh4vxnH1st7Tn5MIok6Cr3PZ7fgXE6ceLB W5BLEvz6LtKyW4+hd7oBZyPuPrM8YInft7dLqIwK+/vqnQiT5mVUo9ld2WhdCWPUeWa5cL36z euGQ8GoWOTBh8ihZpJEy5gA2s1bcFvJb3pQXrF4NujsQdtprvtHl4xoL9mUXtVOjSgsoiXoLT 6V54Vu+9kOZJZQkWysyuTnOw== This adds suspend/resume support for the 8250_bcm2835aux driver to provide power management support on attached devices. Signed-off-by: Stefan Wahren --- drivers/tty/serial/8250/8250_bcm2835aux.c | 37 +++++++++++++++++++++++ 1 file changed, 37 insertions(+) -- 2.34.1 diff --git a/drivers/tty/serial/8250/8250_bcm2835aux.c b/drivers/tty/serial/8250/8250_bcm2835aux.c index 121a5ce86050..36e2bb34d82b 100644 --- a/drivers/tty/serial/8250/8250_bcm2835aux.c +++ b/drivers/tty/serial/8250/8250_bcm2835aux.c @@ -13,6 +13,7 @@ */ #include +#include #include #include #include @@ -213,11 +214,47 @@ static const struct acpi_device_id bcm2835aux_serial_acpi_match[] = { }; MODULE_DEVICE_TABLE(acpi, bcm2835aux_serial_acpi_match); +static int bcm2835aux_suspend(struct device *dev) +{ + struct bcm2835aux_data *data = dev_get_drvdata(dev); + struct uart_8250_port *up = serial8250_get_port(data->line); + + serial8250_suspend_port(data->line); + + if (device_may_wakeup(dev)) + return 0; + + if (uart_console(&up->port) && !console_suspend_enabled) + return 0; + + clk_disable_unprepare(data->clk); + return 0; +} + +static int bcm2835aux_resume(struct device *dev) +{ + struct bcm2835aux_data *data = dev_get_drvdata(dev); + int ret; + + ret = clk_prepare_enable(data->clk); + if (ret) + return ret; + + serial8250_resume_port(data->line); + + return 0; +} + +static const struct dev_pm_ops bcm2835aux_dev_pm_ops = { + 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 = pm_ptr(&bcm2835aux_dev_pm_ops), }, .probe = bcm2835aux_serial_probe, .remove_new = bcm2835aux_serial_remove,