From patchwork Fri Dec 1 07:49:38 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "H. Nikolaus Schaller" X-Patchwork-Id: 10086443 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 118C36037E for ; Fri, 1 Dec 2017 07:51:24 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id F0CED2A375 for ; Fri, 1 Dec 2017 07:51:23 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id E2FE82A4EB; Fri, 1 Dec 2017 07:51:23 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=2.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_HI,T_DKIM_INVALID autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 799CD2A375 for ; Fri, 1 Dec 2017 07:51:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750965AbdLAHvJ (ORCPT ); Fri, 1 Dec 2017 02:51:09 -0500 Received: from mo4-p00-ob.smtp.rzone.de ([81.169.146.160]:19459 "EHLO mo4-p00-ob.smtp.rzone.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751783AbdLAHuQ (ORCPT ); Fri, 1 Dec 2017 02:50:16 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; t=1512114614; s=domk; d=goldelico.com; h=References:In-Reply-To:References:In-Reply-To:Message-Id:Date: Subject:Cc:To:From:X-RZG-CLASS-ID:X-RZG-AUTH:Accept-Language: Auto-Submitted:Cc:Date:From:Message-ID:References:Reply-To:Resent-Cc: Resent-Date:Resent-From:Resent-To:Sender:Subject:To: Content-Alternative:Content-Description:Content-Disposition: Content-Duration:Content-Features:Content-ID:Content-Language: Content-Location:Content-MD5:Content-Transfer-Encoding:Content-Type: MIME-Version; bh=kaPk+E+ViEWEYI3tXcytpZMQ/gKZmFeBiEf0N2Et8vU=; b=AKQf9KlpfwpRQnLpwVhyQYJV3Cz1J1hMCFLFaEJMzgps1K3WaDjUR/OxCprLpDnCTu c/F8YbOMkpj0ZMKfglxvh6oX+RuaYV+rzlrlqWJ+mcLyZG8+R7g1PUxw/2Y9V+Rr3Jtn zZgKy4/YI3rKHpMhjpzZy0neVgcWh57BGbCCI= X-RZG-AUTH: :JGIXVUS7cutRB/49FwqZ7WcJeFKiMgPgp8VKxflSZ1P34KBj4Qpw87WiuNN2FDaY X-RZG-CLASS-ID: mo00 Received: from localhost.localdomain (p57AE00F8.dip0.t-ipconnect.de [87.174.0.248]) by smtp.strato.de (RZmta 42.10 DYNA|AUTH) with ESMTPSA id V027catB17nfHRz (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (curve secp521r1 with 521 ECDH bits, eq. 15360 bits RSA)) (Client did not present a certificate); Fri, 1 Dec 2017 08:49:41 +0100 (CET) From: "H. Nikolaus Schaller" To: Rob Herring , Mark Rutland , =?UTF-8?q?Beno=C3=AEt=20Cousson?= , Tony Lindgren , Russell King , Arnd Bergmann , Greg Kroah-Hartman , "H. Nikolaus Schaller" , Kevin Hilman , =?UTF-8?q?Andreas=20F=C3=A4rber?= , Thierry Reding , Jonathan Cameron Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-omap@vger.kernel.org, letux-kernel@openphoenux.org, kernel@pyra-handheld.com, linux-arm-kernel@lists.infradead.org Subject: [PATCH v5 5/5] misc serdev: w2sg0004: add debugging code and Kconfig Date: Fri, 1 Dec 2017 08:49:38 +0100 Message-Id: <5816bfb9e7cab68591c133e20696d6188ebe70de.1512114577.git.hns@goldelico.com> X-Mailer: git-send-email 2.12.2 In-Reply-To: References: In-Reply-To: References: Sender: linux-omap-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This allows to set CONFIG_W2SG0004_DEBUG which will make the driver report more activities and it will turn on the GPS module during boot while the driver assumes that it is off. This can be used to debug the correct functioning of the hardware. Therefore we add it as an option to the driver because we think it is of general use (and a little tricky to add by system testers). Normally it should be off. Signed-off-by: H. Nikolaus Schaller --- drivers/misc/Kconfig | 8 ++++++++ drivers/misc/w2sg0004.c | 37 +++++++++++++++++++++++++++++++++++++ 2 files changed, 45 insertions(+) diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig index a3b11016ed2b..ad6e60f0cc8c 100644 --- a/drivers/misc/Kconfig +++ b/drivers/misc/Kconfig @@ -518,4 +518,12 @@ config W2SG0004 is opened/closed. It also provides a rfkill gps name to control the LNA power. +config W2SG0004_DEBUG + bool "W2SG0004 on/off debugging" + depends on W2SG0004 + help + Enable driver debugging mode of W2SG0004 GPS. If you say y here + this will turn on the module and you can check if it is turned + off by the driver. + endmenu diff --git a/drivers/misc/w2sg0004.c b/drivers/misc/w2sg0004.c index 6bfd12eb8e02..82c708fce510 100644 --- a/drivers/misc/w2sg0004.c +++ b/drivers/misc/w2sg0004.c @@ -26,6 +26,10 @@ * */ +#ifdef CONFIG_W2SG0004_DEBUG +#define DEBUG 1 +#endif + #include #include #include @@ -256,6 +260,7 @@ static int w2sg_tty_install(struct tty_driver *driver, struct tty_struct *tty) pr_debug("%s() tty = %p\n", __func__, tty); data = w2sg_get_by_minor(tty->index); + pr_debug("%s() data = %p\n", __func__, data); if (!data) return -ENODEV; @@ -342,6 +347,8 @@ static int w2sg_probe(struct serdev_device *serdev) if (data == NULL) return -ENOMEM; + pr_debug("w2sg serdev_device_set_drvdata\n"); + serdev_device_set_drvdata(serdev, data); data->on_off_gpio = of_get_named_gpio_flags(serdev->dev.of_node, @@ -375,6 +382,8 @@ static int w2sg_probe(struct serdev_device *serdev) INIT_DELAYED_WORK(&data->work, toggle_work); + pr_debug("w2sg devm_gpio_request\n"); + err = devm_gpio_request(&serdev->dev, data->on_off_gpio, "w2sg0004-on-off"); if (err < 0) @@ -388,6 +397,8 @@ static int w2sg_probe(struct serdev_device *serdev) serdev_device_set_baudrate(data->uart, 9600); serdev_device_set_flow_control(data->uart, false); + pr_debug("w2sg rfkill_alloc\n"); + rf_kill = rfkill_alloc("GPS", &serdev->dev, RFKILL_TYPE_GPS, &w2sg0004_rfkill_ops, data); if (rf_kill == NULL) { @@ -395,6 +406,8 @@ static int w2sg_probe(struct serdev_device *serdev) goto err_rfkill; } + pr_debug("w2sg register rfkill\n"); + err = rfkill_register(rf_kill); if (err) { dev_err(&serdev->dev, "Cannot register rfkill device\n"); @@ -403,6 +416,8 @@ static int w2sg_probe(struct serdev_device *serdev) data->rf_kill = rf_kill; + pr_debug("w2sg alloc_tty_driver\n"); + /* allocate the tty driver */ data->tty_drv = alloc_tty_driver(1); if (!data->tty_drv) @@ -428,6 +443,8 @@ static int w2sg_probe(struct serdev_device *serdev) */ tty_set_operations(data->tty_drv, &w2sg_serial_ops); + pr_debug("w2sg tty_register_driver\n"); + /* register the tty driver */ err = tty_register_driver(data->tty_drv); if (err) { @@ -443,9 +460,27 @@ static int w2sg_probe(struct serdev_device *serdev) tty_port_init(&data->port); data->port.ops = &w2sg_port_ops; + pr_debug("w2sg call tty_port_register_device\n"); + data->dev = tty_port_register_device(&data->port, data->tty_drv, minor, &serdev->dev); + pr_debug("w2sg tty_port_register_device -> %p\n", data->dev); + pr_debug("w2sg port.tty = %p\n", data->port.tty); + + pr_debug("w2sg probed\n"); + +#ifdef CONFIG_W2SG0004_DEBUG + pr_debug("w2sg DEBUGGING MODE enabled\n"); + /* turn on for debugging rx notifications */ + pr_debug("w2sg power gpio ON\n"); + gpio_set_value_cansleep(data->on_off_gpio, 1); + mdelay(100); + pr_debug("w2sg power gpio OFF\n"); + gpio_set_value_cansleep(data->on_off_gpio, 0); + mdelay(300); +#endif + /* keep off until user space requests the device */ w2sg_set_power(data, false); @@ -455,6 +490,8 @@ static int w2sg_probe(struct serdev_device *serdev) rfkill_destroy(rf_kill); serdev_device_close(data->uart); out: + pr_debug("w2sg error %d\n", err); + return err; }