From patchwork Thu Jan 23 12:43:28 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Linus Walleij X-Patchwork-Id: 3528491 Return-Path: X-Original-To: patchwork-linux-input@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id A8D6F9F1C3 for ; Thu, 23 Jan 2014 12:44:12 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id B1E322012F for ; Thu, 23 Jan 2014 12:44:11 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A58DA200FF for ; Thu, 23 Jan 2014 12:44:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753367AbaAWMng (ORCPT ); Thu, 23 Jan 2014 07:43:36 -0500 Received: from mail-wg0-f52.google.com ([74.125.82.52]:57945 "EHLO mail-wg0-f52.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753514AbaAWMne (ORCPT ); Thu, 23 Jan 2014 07:43:34 -0500 Received: by mail-wg0-f52.google.com with SMTP id b13so1385037wgh.31 for ; Thu, 23 Jan 2014 04:43:33 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id; bh=I3vPFSoYpbxIFuQ7jp3FJZZZy3OFx/ciL7HTDLkQGxc=; b=TyjGH2ZK8N9yJdHPQgVrrT5u+ULqmnKoJr/ypvLkuMr7PyJ3Ofp6jPtsIRdEgcMZUt v5c4KobswSZT24gtbJVAmmmBYIpoq5+XACIQniefeKCIhsPxnAQhU7e5/h2kimfHTre0 cFE2Vdoy/ySdO/IuXx3v9PGHb5yL30iGEnhzRgk1jh+hQmO0bvMCeJTWw8SoXZ2+HwcN via9eZVuc4v9BKnI7ubKOYrIH+Xuq7yFwcDKKaMbiwNyMbzSuSpM11P6emenNxdZQU0T y5sVz8i+yckXz0wcNgf5jTeOuCEHRk9ZCHnyHZJPbEBO5x1VXinpTsJtWQsETL9xdStq BLDg== X-Gm-Message-State: ALoCoQkOCw5ghHMktEiLHDr2FUYj2aNKeSPsR3f8n/gTrMuoi3SxNSEvD4PUzaU8XYkzAU32Thdb X-Received: by 10.194.133.135 with SMTP id pc7mr6387049wjb.51.1390481013098; Thu, 23 Jan 2014 04:43:33 -0800 (PST) Received: from localhost.localdomain ([85.235.11.236]) by mx.google.com with ESMTPSA id f7sm22052212wjb.7.2014.01.23.04.43.31 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 23 Jan 2014 04:43:32 -0800 (PST) From: Linus Walleij To: devicetree@vger.kernel.org, Dmitry Torokhov , linux-input@vger.kernel.org, Samuel Ortiz , Lee Jones Cc: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Mark Rutland , Linus Walleij Subject: [PATCH 2/3 RESEND] mfd: tc3589x: Reform device tree probing Date: Thu, 23 Jan 2014 13:43:28 +0100 Message-Id: <1390481008-23900-1-git-send-email-linus.walleij@linaro.org> X-Mailer: git-send-email 1.8.4.2 Sender: linux-input-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org X-Spam-Status: No, score=-7.5 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This changes the following mechanisms in the TC3589x device tree probing path: - Use the .of_match_table in struct device_driver to match the device in the device tree. - Add matches for the proper compatible strings "toshiba,..." and all sub-variants, just as is done for the .id matches. - Move over all the allocation of platform data etc to the tc3589x_of_probe() function and follow the pattern of passing a platform data pointer back, or an error pointer on error, as found in the STMPE driver. - Match the new (proper) compatible strings for the GPIO and keypad MFD cells. - Use of_device_is_compatible() rather than just !strcmp() to discover which cells to instantiate. Signed-off-by: Linus Walleij Acked-by: Lee Jones --- drivers/mfd/tc3589x.c | 84 ++++++++++++++++++++++++++++++++++++--------------- 1 file changed, 59 insertions(+), 25 deletions(-) diff --git a/drivers/mfd/tc3589x.c b/drivers/mfd/tc3589x.c index 87ea51dc6234..ed1ee2634809 100644 --- a/drivers/mfd/tc3589x.c +++ b/drivers/mfd/tc3589x.c @@ -13,8 +13,10 @@ #include #include #include +#include #include #include +#include /** * enum tc3589x_version - indicates the TC3589x version @@ -160,7 +162,7 @@ static struct mfd_cell tc3589x_dev_gpio[] = { .name = "tc3589x-gpio", .num_resources = ARRAY_SIZE(gpio_resources), .resources = &gpio_resources[0], - .of_compatible = "tc3589x-gpio", + .of_compatible = "toshiba,tc3589x-gpio", }, }; @@ -169,7 +171,7 @@ static struct mfd_cell tc3589x_dev_keypad[] = { .name = "tc3589x-keypad", .num_resources = ARRAY_SIZE(keypad_resources), .resources = &keypad_resources[0], - .of_compatible = "tc3589x-keypad", + .of_compatible = "toshiba,tc3589x-keypad", }, }; @@ -318,45 +320,74 @@ static int tc3589x_device_init(struct tc3589x *tc3589x) return ret; } -static int tc3589x_of_probe(struct device_node *np, - struct tc3589x_platform_data *pdata) +#ifdef CONFIG_OF +static const struct of_device_id tc3589x_match[] = { + /* Legacy compatible string */ + { .compatible = "tc3589x", .data = (void *) TC3589X_UNKNOWN }, + { .compatible = "toshiba,tc35890", .data = (void *) TC3589X_TC35890 }, + { .compatible = "toshiba,tc35892", .data = (void *) TC3589X_TC35892 }, + { .compatible = "toshiba,tc35893", .data = (void *) TC3589X_TC35893 }, + { .compatible = "toshiba,tc35894", .data = (void *) TC3589X_TC35894 }, + { .compatible = "toshiba,tc35895", .data = (void *) TC3589X_TC35895 }, + { .compatible = "toshiba,tc35896", .data = (void *) TC3589X_TC35896 }, + { } +}; + +MODULE_DEVICE_TABLE(of, tc3589x_match); + +static struct tc3589x_platform_data * +tc3589x_of_probe(struct device *dev, enum tc3589x_version *version) { + struct device_node *np = dev->of_node; + struct tc3589x_platform_data *pdata; struct device_node *child; + const struct of_device_id *of_id; + + pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); + if (!pdata) + return ERR_PTR(-ENOMEM); + + of_id = of_match_device(tc3589x_match, dev); + if (!of_id) + return ERR_PTR(-ENODEV); + *version = (enum tc3589x_version) of_id->data; for_each_child_of_node(np, child) { - if (!strcmp(child->name, "tc3589x_gpio")) { + if (of_device_is_compatible(child, "toshiba,tc3589x-gpio")) pdata->block |= TC3589x_BLOCK_GPIO; - } - if (!strcmp(child->name, "tc3589x_keypad")) { + if (of_device_is_compatible(child, "toshiba,tc3589x-keypad")) pdata->block |= TC3589x_BLOCK_KEYPAD; - } } - return 0; + return pdata; } +#else +static inline struct tc3589x_platform_data * +tc3589x_of_probe(struct device *dev, enum tc3589x_version *version) +{ + dev_err(dev, "no device tree support\n"); + return ERR_PTR(-ENODEV); +} +#endif static int tc3589x_probe(struct i2c_client *i2c, const struct i2c_device_id *id) { - struct tc3589x_platform_data *pdata = dev_get_platdata(&i2c->dev); struct device_node *np = i2c->dev.of_node; + struct tc3589x_platform_data *pdata = dev_get_platdata(&i2c->dev); struct tc3589x *tc3589x; + enum tc3589x_version version; int ret; if (!pdata) { - if (np) { - pdata = devm_kzalloc(&i2c->dev, sizeof(*pdata), GFP_KERNEL); - if (!pdata) - return -ENOMEM; - - ret = tc3589x_of_probe(np, pdata); - if (ret) - return ret; - } - else { + pdata = tc3589x_of_probe(&i2c->dev, &version); + if (IS_ERR(pdata)) { dev_err(&i2c->dev, "No platform data or DT found\n"); - return -EINVAL; + return PTR_ERR(pdata); } + } else { + /* When not probing from device tree we have this ID */ + version = id->driver_data; } if (!i2c_check_functionality(i2c->adapter, I2C_FUNC_SMBUS_BYTE_DATA @@ -375,7 +406,7 @@ static int tc3589x_probe(struct i2c_client *i2c, tc3589x->pdata = pdata; tc3589x->irq_base = pdata->irq_base; - switch (id->driver_data) { + switch (version) { case TC3589X_TC35893: case TC3589X_TC35895: case TC3589X_TC35896: @@ -471,9 +502,12 @@ static const struct i2c_device_id tc3589x_id[] = { MODULE_DEVICE_TABLE(i2c, tc3589x_id); static struct i2c_driver tc3589x_driver = { - .driver.name = "tc3589x", - .driver.owner = THIS_MODULE, - .driver.pm = &tc3589x_dev_pm_ops, + .driver = { + .name = "tc3589x", + .owner = THIS_MODULE, + .pm = &tc3589x_dev_pm_ops, + .of_match_table = of_match_ptr(tc3589x_match), + }, .probe = tc3589x_probe, .remove = tc3589x_remove, .id_table = tc3589x_id,