From patchwork Tue Sep 8 12:58:12 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bartosz Golaszewski X-Patchwork-Id: 1359821 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=linux-gpio-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=bgdev.pl Authentication-Results: ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=bgdev-pl.20150623.gappssmtp.com header.i=@bgdev-pl.20150623.gappssmtp.com header.a=rsa-sha256 header.s=20150623 header.b=h24MOzIw; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4Bm9fw5yYzz9sTS for ; Wed, 9 Sep 2020 02:32:40 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731827AbgIHQci (ORCPT ); Tue, 8 Sep 2020 12:32:38 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59778 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732030AbgIHQcQ (ORCPT ); Tue, 8 Sep 2020 12:32:16 -0400 Received: from mail-wr1-x441.google.com (mail-wr1-x441.google.com [IPv6:2a00:1450:4864:20::441]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2ED8EC0612F9 for ; Tue, 8 Sep 2020 05:58:29 -0700 (PDT) Received: by mail-wr1-x441.google.com with SMTP id z4so19026714wrr.4 for ; Tue, 08 Sep 2020 05:58:29 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bgdev-pl.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=ikPWUVajWpPhi7pSm8HDj7BsQ12e/VRbizs3Bl5cmps=; b=h24MOzIws0owVLCP26G8p4TfyQNkcA9CMUdzjx/1FD/NuKFbPRZAdjmyVpOGHeC52G l4287SGB/RoIq/KGngRwJ2c5tvGgq18w5bwZpE5TC8PMPvIOrpWvPLAXOK7pmpuEMMwm 2sEFg7DcTLrf2TqbHdyDw/kPRqYVYywzWS3ixv9mKN+qWVNavk4UA8J0coLwWfngQFZS 1c5w/U6CHN+IcIaNaPBgN54KggRnflv8e7lAePrD1QKI+i93TOHLmv6oIhp63/YqPmsZ m4Qx8OHyMCzzHHgDB/JyeGBU2OAFmeFzE9XPGwgIzAkH7G6+ISJQQlPX+qrOHzKDi/Z5 LgkA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=ikPWUVajWpPhi7pSm8HDj7BsQ12e/VRbizs3Bl5cmps=; b=AQJjbBIlEYgll7sdhBohjenR9lJZ+3vBgc3CDC47gicM9Bc14F65NYSVLrwQAl6AfW nAUh+J+2CsZrPEAESooWoJwdM5/mnogJoiXhTG5yTKW/FU+dX97kpIJfm+42RYTu+tFc q43vNW+I7bwyQ6EAe8M0VL3zN4KL64nKugdPwdTGY/EZsVom30627amZ2pWekcaE1V5i ymR0w2xoiUat58ILhdv5QkNSpw1ZgTzUkfjqi6d4Att8FmVT4tfAzcNtQe4KJKsgyEPT 73lqd7HE4jO9Gm1Qfb6T3TUPX7ZAWf9wsgUpn6ke3chExM0E6AHxkymyki71nWhYDai5 HNjw== X-Gm-Message-State: AOAM532Fa74TV5Y743Y1IltHrkbVlmpM5Kh/zAvGFyzLzeZkxQpXkckF I3Ya8U4bQ8CxmXMtNj+CgD4Bug== X-Google-Smtp-Source: ABdhPJwHjgDUtqRBB/g2d8wiJyug79CxIptyIXQB/lJ1EwW+nOgQ4NMwQLw+Ld4+xyg8DQrXp4w50w== X-Received: by 2002:adf:b306:: with SMTP id j6mr25583555wrd.279.1599569908453; Tue, 08 Sep 2020 05:58:28 -0700 (PDT) Received: from debian-brgl.home (lfbn-nic-1-68-20.w2-15.abo.wanadoo.fr. [2.15.159.20]) by smtp.gmail.com with ESMTPSA id y207sm34817875wmc.17.2020.09.08.05.58.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 08 Sep 2020 05:58:27 -0700 (PDT) From: Bartosz Golaszewski To: Linus Walleij , Mika Westerberg , Andy Shevchenko , Kent Gibson , Greg Kroah-Hartman Cc: linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org, Bartosz Golaszewski Subject: [PATCH 2/3] gpiolib: generalize devprop_gpiochip_set_names() for device properties Date: Tue, 8 Sep 2020 14:58:12 +0200 Message-Id: <20200908125813.8809-3-brgl@bgdev.pl> X-Mailer: git-send-email 2.26.1 In-Reply-To: <20200908125813.8809-1-brgl@bgdev.pl> References: <20200908125813.8809-1-brgl@bgdev.pl> MIME-Version: 1.0 Sender: linux-gpio-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org From: Bartosz Golaszewski devprop_gpiochip_set_names() is overly complicated with taking the fwnode argument (which requires using dev_fwnode() & of_fwnode_handle() in ACPI and OF GPIO code respectively). Let's just switch to using the generic device properties. This allows us to pull the code setting line names directly into gpiochip_add_data_with_key() instead of handling it separately for ACPI and OF. Signed-off-by: Bartosz Golaszewski --- drivers/gpio/gpiolib-acpi.c | 3 --- drivers/gpio/gpiolib-devprop.c | 20 ++++++++++---------- drivers/gpio/gpiolib-of.c | 5 ----- drivers/gpio/gpiolib.c | 8 ++++---- include/linux/gpio/driver.h | 3 +-- 5 files changed, 15 insertions(+), 24 deletions(-) diff --git a/drivers/gpio/gpiolib-acpi.c b/drivers/gpio/gpiolib-acpi.c index 54ca3c18b291..834a12f3219e 100644 --- a/drivers/gpio/gpiolib-acpi.c +++ b/drivers/gpio/gpiolib-acpi.c @@ -1221,9 +1221,6 @@ void acpi_gpiochip_add(struct gpio_chip *chip) return; } - if (!chip->names) - devprop_gpiochip_set_names(chip, dev_fwnode(chip->parent)); - acpi_gpiochip_request_regions(acpi_gpio); acpi_gpiochip_scan_gpios(acpi_gpio); acpi_walk_dep_device_list(handle); diff --git a/drivers/gpio/gpiolib-devprop.c b/drivers/gpio/gpiolib-devprop.c index 26741032fa9e..29ee00d7730e 100644 --- a/drivers/gpio/gpiolib-devprop.c +++ b/drivers/gpio/gpiolib-devprop.c @@ -17,25 +17,23 @@ /** * devprop_gpiochip_set_names - Set GPIO line names using device properties * @chip: GPIO chip whose lines should be named, if possible - * @fwnode: Property Node containing the gpio-line-names property * * Looks for device property "gpio-line-names" and if it exists assigns * GPIO line names for the chip. The memory allocated for the assigned - * names belong to the underlying firmware node and should not be released + * names belong to the underlying software node and should not be released * by the caller. */ -void devprop_gpiochip_set_names(struct gpio_chip *chip, - const struct fwnode_handle *fwnode) +int devprop_gpiochip_set_names(struct gpio_chip *chip) { struct gpio_device *gdev = chip->gpiodev; + struct device *dev = chip->parent; const char **names; int ret, i; int count; - count = fwnode_property_read_string_array(fwnode, "gpio-line-names", - NULL, 0); + count = device_property_count_strings(dev, "gpio-line-names"); if (count < 0) - return; + return 0; if (count > gdev->ngpio) { dev_warn(&gdev->dev, "gpio-line-names is length %d but should be at most length %d", @@ -45,19 +43,21 @@ void devprop_gpiochip_set_names(struct gpio_chip *chip, names = kcalloc(count, sizeof(*names), GFP_KERNEL); if (!names) - return; + return -ENOMEM; - ret = fwnode_property_read_string_array(fwnode, "gpio-line-names", + ret = device_property_read_string_array(dev, "gpio-line-names", names, count); if (ret < 0) { dev_warn(&gdev->dev, "failed to read GPIO line names\n"); kfree(names); - return; + return ret; } for (i = 0; i < count; i++) gdev->descs[i].name = names[i]; kfree(names); + + return 0; } EXPORT_SYMBOL_GPL(devprop_gpiochip_set_names); diff --git a/drivers/gpio/gpiolib-of.c b/drivers/gpio/gpiolib-of.c index bd31dd3b6a75..2f895a2b8411 100644 --- a/drivers/gpio/gpiolib-of.c +++ b/drivers/gpio/gpiolib-of.c @@ -1026,11 +1026,6 @@ int of_gpiochip_add(struct gpio_chip *chip) if (ret) return ret; - /* If the chip defines names itself, these take precedence */ - if (!chip->names) - devprop_gpiochip_set_names(chip, - of_fwnode_handle(chip->of_node)); - of_node_get(chip->of_node); ret = of_gpiochip_scan_gpios(chip); diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index 80137c1b3cdc..0d390f0ec32c 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -340,9 +340,6 @@ static int gpiochip_set_desc_names(struct gpio_chip *gc) struct gpio_device *gdev = gc->gpiodev; int i; - if (!gc->names) - return 0; - /* First check all names if they are unique */ for (i = 0; i != gc->ngpio; ++i) { struct gpio_desc *gpio; @@ -621,7 +618,10 @@ int gpiochip_add_data_with_key(struct gpio_chip *gc, void *data, INIT_LIST_HEAD(&gdev->pin_ranges); #endif - ret = gpiochip_set_desc_names(gc); + if (gc->names) + ret = gpiochip_set_desc_names(gc); + else + ret = devprop_gpiochip_set_names(gc); if (ret) goto err_remove_from_list; diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h index d1cef5c2715c..56485a040b82 100644 --- a/include/linux/gpio/driver.h +++ b/include/linux/gpio/driver.h @@ -756,8 +756,7 @@ struct gpio_desc *gpiochip_request_own_desc(struct gpio_chip *gc, enum gpiod_flags dflags); void gpiochip_free_own_desc(struct gpio_desc *desc); -void devprop_gpiochip_set_names(struct gpio_chip *gc, - const struct fwnode_handle *fwnode); +int devprop_gpiochip_set_names(struct gpio_chip *gc); #ifdef CONFIG_GPIOLIB