From patchwork Mon Dec 9 15:08:57 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Heikki Krogerus X-Patchwork-Id: 3311581 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 1661DC0D4A for ; Mon, 9 Dec 2013 15:12:50 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 68A632034E for ; Mon, 9 Dec 2013 15:12:48 +0000 (UTC) Received: from casper.infradead.org (casper.infradead.org [85.118.1.10]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id E1B82202FE for ; Mon, 9 Dec 2013 15:12:45 +0000 (UTC) Received: from merlin.infradead.org ([2001:4978:20e::2]) by casper.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1Vq2UC-00011X-3j; Mon, 09 Dec 2013 15:11:05 +0000 Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1Vq2Tm-0007mJ-08; Mon, 09 Dec 2013 15:10:38 +0000 Received: from mga14.intel.com ([143.182.124.37]) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1Vq2T1-0007g5-Mn for linux-arm-kernel@lists.infradead.org; Mon, 09 Dec 2013 15:09:57 +0000 Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by azsmga102.ch.intel.com with ESMTP; 09 Dec 2013 07:09:11 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.93,858,1378882800"; d="scan'208";a="441039643" Received: from blue.fi.intel.com ([10.237.72.156]) by fmsmga001.fm.intel.com with ESMTP; 09 Dec 2013 07:09:08 -0800 From: Heikki Krogerus To: Kishon Vijay Abraham I Subject: [PATCH] phy: remove the old lookup method Date: Mon, 9 Dec 2013 17:08:57 +0200 Message-Id: <1386601737-8735-6-git-send-email-heikki.krogerus@linux.intel.com> X-Mailer: git-send-email 1.8.5.1 In-Reply-To: <1386601737-8735-1-git-send-email-heikki.krogerus@linux.intel.com> References: <1386601737-8735-1-git-send-email-heikki.krogerus@linux.intel.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20131209_100952_259423_0D1FF766 X-CRM114-Status: GOOD ( 30.44 ) X-Spam-Score: -6.9 (------) Cc: Kukjin Kim , Tony Lindgren , linux-kernel@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-omap@vger.kernel.org, linux-arm-kernel@lists.infradead.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, 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 The users of the old method are now converted to the new one. Signed-off-by: Heikki Krogerus --- Documentation/phy.txt | 100 ++++++++++++++++++++++-------------- drivers/phy/phy-core.c | 46 ++--------------- drivers/phy/phy-exynos-dp-video.c | 2 +- drivers/phy/phy-exynos-mipi-video.c | 2 +- drivers/phy/phy-omap-usb2.c | 2 +- drivers/phy/phy-twl4030-usb.c | 4 +- include/linux/phy/phy.h | 36 ++----------- 7 files changed, 73 insertions(+), 119 deletions(-) diff --git a/Documentation/phy.txt b/Documentation/phy.txt index 0103e4b..cfff1a2 100644 --- a/Documentation/phy.txt +++ b/Documentation/phy.txt @@ -53,17 +53,13 @@ unregister the PHY. The PHY driver should create the PHY in order for other peripheral controllers to make use of it. The PHY framework provides 2 APIs to create the PHY. -struct phy *phy_create(struct device *dev, const struct phy_ops *ops, - struct phy_init_data *init_data); -struct phy *devm_phy_create(struct device *dev, const struct phy_ops *ops, - struct phy_init_data *init_data); +struct phy *phy_create(struct device *dev, const struct phy_ops *ops); +struct phy *devm_phy_create(struct device *dev, const struct phy_ops *ops); The PHY drivers can use one of the above 2 APIs to create the PHY by passing -the device pointer, phy ops and init_data. +the device pointer, phy ops. phy_ops is a set of function pointers for performing PHY operations such as -init, exit, power_on and power_off. *init_data* is mandatory to get a reference -to the PHY in the case of non-dt boot. See section *Board File Initialization* -on how init_data should be used. +init, exit, power_on and power_off. Inorder to dereference the private data (in phy_ops), the phy provider driver can use phy_set_drvdata() after creating the PHY and use phy_get_drvdata() in @@ -74,16 +70,21 @@ phy_ops to get back the private data. Before the controller can make use of the PHY, it has to get a reference to it. This framework provides the following APIs to get a reference to the PHY. -struct phy *phy_get(struct device *dev, const char *string); -struct phy *devm_phy_get(struct device *dev, const char *string); +struct phy *phy_get(struct device *dev, const char *con_id); +struct phy *devm_phy_get(struct device *dev, const char *con_id); phy_get and devm_phy_get can be used to get the PHY. In the case of dt boot, -the string arguments should contain the phy name as given in the dt data and +the con_id arguments should contain the phy name as given in the dt data and in the case of non-dt boot, it should contain the label of the PHY. The only difference between the two APIs is that devm_phy_get associates the device with the PHY using devres on successful PHY get. On driver detach, release function is invoked on the the devres data and devres data is freed. +Indexed lookup is also possible when device has multiple PHYs attached to it. +The framework provides variants for phy_get() functions called phy_get_index() +and devm_phy_get_index(). They take the same parameters as do the normal +phy_get() plus the index number of the PHY as the last parameter. + 5. Releasing a reference to the PHY When the controller no longer needs the PHY, it has to release the reference @@ -123,42 +124,63 @@ There are exported APIs like phy_pm_runtime_get, phy_pm_runtime_get_sync, phy_pm_runtime_put, phy_pm_runtime_put_sync, phy_pm_runtime_allow and phy_pm_runtime_forbid for performing PM operations. -8. Board File Initialization +8. Platform Data binding -Certain board file initialization is necessary in order to get a reference -to the PHY in the case of non-dt boot. -Say we have a single device that implements 3 PHYs that of USB, SATA and PCIe, -then in the board file the following initialization should be done. +PHY's are mapped by the means of tables of lookups, containing instances of the +phy_lookup structure. Two macros are defined to help declaring such mappings: -struct phy_consumer consumers[] = { - PHY_CONSUMER("dwc3.0", "usb"), - PHY_CONSUMER("pcie.0", "pcie"), - PHY_CONSUMER("sata.0", "sata"), -}; -PHY_CONSUMER takes 2 parameters, first is the device name of the controller -(PHY consumer) and second is the port name. + PHY_LOOKUP(phy_name, con_id) + PHY_LOOKUP_IDX(phy_name, con_id, idx) + +where -struct phy_init_data init_data = { - .consumers = consumers, - .num_consumers = ARRAY_SIZE(consumers), + - phy_name identifiers of the phy device + - con_id is the name of the PHY from the device point of view. It can be NULL. + - idx is the index of the PHY within the function. + +A lookup table can then be defined as follows, with an empty entry defining its +end: + +struct phy_lookup_table phys_table = { + .dev_id = "usb_controller.0", + .table = { + PHY_LOOKUP_IDX("phy-usb2phy.0", "usb2-phy", 0), + PHY_LOOKUP_IDX("phy-usb3phy.0", "usb3-phy", 1), + { }, + }, }; -static const struct platform_device pipe3_phy_dev = { - .name = "pipe3-phy", - .id = -1, - .dev = { - .platform_data = { - .init_data = &init_data, - }, - }, +or when there is only single PHY: + +struct phy_lookup_table phy_table = { + .dev_id = "foo.0", + .table = PHY_LOOKUP("phy.0", NULL), }; -then, while doing phy_create, the PHY driver should pass this init_data - phy_create(dev, ops, pdata->init_data); +And the table can be added by the board code as follows: + + phy_add_table(&phys_table); +and + phy_add_table(&phy_table); + +The driver controlling "usb_controller.0" will then be able to obtain its PHYs +as follows: + + struct phy *usb2_phy, usb3_phy; + + usb2_phy = phy_get(dev, "usb2-phy"); + usb3_phy = phy_get(dev, "usb3-phy"); +or + usb2_phy = phy_get_index(dev, "usb2-phy", 0); + usb3_phy = phy_get_index(dev, "usb3-phy", 1); + +The driver controlling "foo.0" can obtain its PHY as follows: + + struct phy *phy; -and the controller driver (phy consumer) should pass the port name along with -the device to get a reference to the PHY - phy_get(dev, "pcie"); + phy = phy_get(dev, NULL); +or + phy = phy_get_index(dev, NULL, 0); 9. DeviceTree Binding diff --git a/drivers/phy/phy-core.c b/drivers/phy/phy-core.c index 05792d0..26f19ee 100644 --- a/drivers/phy/phy-core.c +++ b/drivers/phy/phy-core.c @@ -54,38 +54,6 @@ static int devm_phy_match(struct device *dev, void *res, void *match_data) return res == match_data; } -static struct phy *phy_lookup(struct device *device, const char *con_id, - unsigned int idx) -{ - unsigned int count; - struct phy *phy; - struct device *dev; - struct phy_consumer *consumers; - struct class_dev_iter iter; - - class_dev_iter_init(&iter, phy_class, NULL, NULL); - while ((dev = class_dev_iter_next(&iter))) { - phy = to_phy(dev); - count = phy->init_data->num_consumers; - consumers = phy->init_data->consumers; - while (count--) { - /* index must always match exactly */ - if (!con_id) - if (idx != count) - continue; - if (!strcmp(consumers->dev_name, dev_name(device)) && - !strcmp(consumers->port, con_id)) { - class_dev_iter_exit(&iter); - return phy; - } - consumers++; - } - } - - class_dev_iter_exit(&iter); - return ERR_PTR(-ENODEV); -} - /** * phy_add_table() - register PHY/device association to the lookup list * @table: association to register @@ -150,8 +118,7 @@ static struct phy *phy_find(struct device *dev, const char *con_id, table = phy_get_lookup_table(dev); if (!table) - /* fall-back to the old lookup method for now */ - return phy_lookup(dev, con_id, idx); + return ERR_PTR(-ENODEV); for (p = &table->table[0]; p->phy_name; p++) { /* index must always match exactly */ @@ -557,12 +524,10 @@ EXPORT_SYMBOL_GPL(devm_phy_get); * phy_create() - create a new phy * @dev: device that is creating the new phy * @ops: function pointers for performing phy operations - * @init_data: contains the list of PHY consumers or NULL * * Called to create a phy using phy framework. */ -struct phy *phy_create(struct device *dev, const struct phy_ops *ops, - struct phy_init_data *init_data) +struct phy *phy_create(struct device *dev, const struct phy_ops *ops) { int ret; int id; @@ -595,7 +560,6 @@ struct phy *phy_create(struct device *dev, const struct phy_ops *ops, phy->dev.of_node = dev->of_node; phy->id = id; phy->ops = ops; - phy->init_data = init_data; ret = dev_set_name(&phy->dev, "phy-%s.%d", dev_name(dev), id); if (ret) @@ -626,15 +590,13 @@ EXPORT_SYMBOL_GPL(phy_create); * devm_phy_create() - create a new phy * @dev: device that is creating the new phy * @ops: function pointers for performing phy operations - * @init_data: contains the list of PHY consumers or NULL * * Creates a new PHY device adding it to the PHY class. * While at that, it also associates the device with the phy using devres. * On driver detach, release function is invoked on the devres data, * then, devres data is freed. */ -struct phy *devm_phy_create(struct device *dev, const struct phy_ops *ops, - struct phy_init_data *init_data) +struct phy *devm_phy_create(struct device *dev, const struct phy_ops *ops) { struct phy **ptr, *phy; @@ -642,7 +604,7 @@ struct phy *devm_phy_create(struct device *dev, const struct phy_ops *ops, if (!ptr) return ERR_PTR(-ENOMEM); - phy = phy_create(dev, ops, init_data); + phy = phy_create(dev, ops); if (!IS_ERR(phy)) { *ptr = phy; devres_add(dev, ptr); diff --git a/drivers/phy/phy-exynos-dp-video.c b/drivers/phy/phy-exynos-dp-video.c index 1dbe6ce..e6c5065 100644 --- a/drivers/phy/phy-exynos-dp-video.c +++ b/drivers/phy/phy-exynos-dp-video.c @@ -80,7 +80,7 @@ static int exynos_dp_video_phy_probe(struct platform_device *pdev) if (IS_ERR(phy_provider)) return PTR_ERR(phy_provider); - phy = devm_phy_create(dev, &exynos_dp_video_phy_ops, NULL); + phy = devm_phy_create(dev, &exynos_dp_video_phy_ops); if (IS_ERR(phy)) { dev_err(dev, "failed to create Display Port PHY\n"); return PTR_ERR(phy); diff --git a/drivers/phy/phy-exynos-mipi-video.c b/drivers/phy/phy-exynos-mipi-video.c index 0c5efab..900a14d 100644 --- a/drivers/phy/phy-exynos-mipi-video.c +++ b/drivers/phy/phy-exynos-mipi-video.c @@ -141,7 +141,7 @@ static int exynos_mipi_video_phy_probe(struct platform_device *pdev) for (i = 0; i < EXYNOS_MIPI_PHYS_NUM; i++) { struct phy *phy = devm_phy_create(dev, - &exynos_mipi_video_phy_ops, NULL); + &exynos_mipi_video_phy_ops); if (IS_ERR(phy)) { dev_err(dev, "failed to create PHY %d\n", i); return PTR_ERR(phy); diff --git a/drivers/phy/phy-omap-usb2.c b/drivers/phy/phy-omap-usb2.c index bfc5c33..87c9d8b 100644 --- a/drivers/phy/phy-omap-usb2.c +++ b/drivers/phy/phy-omap-usb2.c @@ -208,7 +208,7 @@ static int omap_usb2_probe(struct platform_device *pdev) platform_set_drvdata(pdev, phy); pm_runtime_enable(phy->dev); - generic_phy = devm_phy_create(phy->dev, &ops, NULL); + generic_phy = devm_phy_create(phy->dev, &ops); if (IS_ERR(generic_phy)) return PTR_ERR(generic_phy); diff --git a/drivers/phy/phy-twl4030-usb.c b/drivers/phy/phy-twl4030-usb.c index daf65e6..bcc2f7d 100644 --- a/drivers/phy/phy-twl4030-usb.c +++ b/drivers/phy/phy-twl4030-usb.c @@ -659,7 +659,6 @@ static int twl4030_usb_probe(struct platform_device *pdev) struct usb_otg *otg; struct device_node *np = pdev->dev.of_node; struct phy_provider *phy_provider; - struct phy_init_data *init_data = NULL; twl = devm_kzalloc(&pdev->dev, sizeof *twl, GFP_KERNEL); if (!twl) @@ -670,7 +669,6 @@ static int twl4030_usb_probe(struct platform_device *pdev) (enum twl4030_usb_mode *)&twl->usb_mode); else if (pdata) { twl->usb_mode = pdata->usb_mode; - init_data = pdata->init_data; } else { dev_err(&pdev->dev, "twl4030 initialized without pdata\n"); return -EINVAL; @@ -700,7 +698,7 @@ static int twl4030_usb_probe(struct platform_device *pdev) if (IS_ERR(phy_provider)) return PTR_ERR(phy_provider); - phy = devm_phy_create(twl->dev, &ops, init_data); + phy = devm_phy_create(twl->dev, &ops); if (IS_ERR(phy)) { dev_dbg(&pdev->dev, "Failed to create PHY\n"); return PTR_ERR(phy); diff --git a/include/linux/phy/phy.h b/include/linux/phy/phy.h index cca363a..a0fd30f 100644 --- a/include/linux/phy/phy.h +++ b/include/linux/phy/phy.h @@ -73,32 +73,6 @@ struct phy_provider { }; /** - * struct phy_consumer - represents the phy consumer - * @dev_name: the device name of the controller that will use this PHY device - * @port: name given to the consumer port - */ -struct phy_consumer { - const char *dev_name; - const char *port; -}; - -/** - * struct phy_init_data - contains the list of PHY consumers - * @num_consumers: number of consumers for this PHY device - * @consumers: list of PHY consumers - */ -struct phy_init_data { - unsigned int num_consumers; - struct phy_consumer *consumers; -}; - -#define PHY_CONSUMER(_dev_name, _port) \ -{ \ - .dev_name = _dev_name, \ - .port = _port, \ -} - -/** * struct phy_lookup - Lookup entry for associating PHYs * @phy_name: device name of the PHY * @con_id: name of the PHY from device's point of view @@ -183,10 +157,8 @@ void phy_put(struct phy *phy); void devm_phy_put(struct device *dev, struct phy *phy); struct phy *of_phy_simple_xlate(struct device *dev, struct of_phandle_args *args); -struct phy *phy_create(struct device *dev, const struct phy_ops *ops, - struct phy_init_data *init_data); -struct phy *devm_phy_create(struct device *dev, - const struct phy_ops *ops, struct phy_init_data *init_data); +struct phy *phy_create(struct device *dev, const struct phy_ops *ops); +struct phy *devm_phy_create(struct device *dev, const struct phy_ops *ops); void phy_destroy(struct phy *phy); void devm_phy_destroy(struct device *dev, struct phy *phy); struct phy_provider *__of_phy_provider_register(struct device *dev, @@ -286,13 +258,13 @@ static inline struct phy *of_phy_simple_xlate(struct device *dev, } static inline struct phy *phy_create(struct device *dev, - const struct phy_ops *ops, struct phy_init_data *init_data) + const struct phy_ops *ops) { return ERR_PTR(-ENOSYS); } static inline struct phy *devm_phy_create(struct device *dev, - const struct phy_ops *ops, struct phy_init_data *init_data) + const struct phy_ops *ops) { return ERR_PTR(-ENOSYS); }