From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9452BC43217 for ; Thu, 13 Oct 2022 00:24:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230057AbiJMAYW (ORCPT ); Wed, 12 Oct 2022 20:24:22 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41048 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230263AbiJMAXJ (ORCPT ); Wed, 12 Oct 2022 20:23:09 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9F4C0F2500; Wed, 12 Oct 2022 17:20:12 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 1069F616CB; Thu, 13 Oct 2022 00:19:42 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id A60C5C433C1; Thu, 13 Oct 2022 00:19:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1665620381; bh=05tHYDl0nCSFNGJfcIoLJ19XFBGzxDdpOegDlvQLB38=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=qYS3BgWOdQxLV14SGXLgYZnvVOwzmIuEsDhSA9uT4mcCo+zLddMISCcH6clrFUTSn ZpTa1ORcufxP4s0mXebmpQhPNBlepDIiStMpczxVl29F/XWy0gkjXa81DGWYxL6/QZ X8D+GohEYbB/Y2WV+ZQrDqh5Y5IVMI81852XcfferBA9yWSmi+wJf/HKCfVMgoEZRV 7hmJ10jV4KuZOayCWF0NIcrYAgw5G+Lq54xPZCWhiuoHfsP2Jt/kIGoVUGlAPN83eJ 7iJr1REak5eLlYpjl7iPsj75FHGApxOmfVaRwj8c92ilEM0mT47AOXMvkIkxvA370v IyPf0AzZDmsHg== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Dmitry Torokhov , Linus Walleij , Bartosz Golaszewski , Sasha Levin , linux-gpio@vger.kernel.org Subject: [PATCH AUTOSEL 5.19 23/63] gpiolib: rework quirk handling in of_find_gpio() Date: Wed, 12 Oct 2022 20:17:57 -0400 Message-Id: <20221013001842.1893243-23-sashal@kernel.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20221013001842.1893243-1-sashal@kernel.org> References: <20221013001842.1893243-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org From: Dmitry Torokhov [ Upstream commit a2b5e207cade33b4d2dfd920f783f13b1f173e78 ] Instead of having a string of "if" statements let's put all quirks into an array and iterate over them. Signed-off-by: Dmitry Torokhov Reviewed-by: Linus Walleij Signed-off-by: Bartosz Golaszewski Signed-off-by: Sasha Levin --- drivers/gpio/gpiolib-of.c | 62 ++++++++++++++++----------------------- 1 file changed, 26 insertions(+), 36 deletions(-) diff --git a/drivers/gpio/gpiolib-of.c b/drivers/gpio/gpiolib-of.c index a5b4abb980de..12370d3f5dcb 100644 --- a/drivers/gpio/gpiolib-of.c +++ b/drivers/gpio/gpiolib-of.c @@ -369,14 +369,12 @@ EXPORT_SYMBOL_GPL(gpiod_get_from_of_node); * properties should be named "foo-gpios" so we have this special kludge for * them. */ -static struct gpio_desc *of_find_spi_gpio(struct device *dev, +static struct gpio_desc *of_find_spi_gpio(struct device_node *np, const char *con_id, unsigned int idx, enum of_gpio_flags *of_flags) { char prop_name[32]; /* 32 is max size of property name */ - const struct device_node *np = dev->of_node; - struct gpio_desc *desc; /* * Hopefully the compiler stubs the rest of the function if this @@ -392,8 +390,7 @@ static struct gpio_desc *of_find_spi_gpio(struct device *dev, /* Will be "gpio-sck", "gpio-mosi" or "gpio-miso" */ snprintf(prop_name, sizeof(prop_name), "%s-%s", "gpio", con_id); - desc = of_get_named_gpiod_flags(np, prop_name, idx, of_flags); - return desc; + return of_get_named_gpiod_flags(np, prop_name, idx, of_flags); } /* @@ -401,13 +398,11 @@ static struct gpio_desc *of_find_spi_gpio(struct device *dev, * lines rather than "cs-gpios" like all other SPI hardware. Account for this * with a special quirk. */ -static struct gpio_desc *of_find_spi_cs_gpio(struct device *dev, +static struct gpio_desc *of_find_spi_cs_gpio(struct device_node *np, const char *con_id, unsigned int idx, enum of_gpio_flags *of_flags) { - const struct device_node *np = dev->of_node; - if (!IS_ENABLED(CONFIG_SPI_MASTER)) return ERR_PTR(-ENOENT); @@ -425,7 +420,7 @@ static struct gpio_desc *of_find_spi_cs_gpio(struct device *dev, * uses just "gpios" so translate to that when "cs-gpios" is * requested. */ - return of_get_named_gpiod_flags(dev->of_node, "gpios", idx, of_flags); + return of_get_named_gpiod_flags(np, "gpios", idx, of_flags); } /* @@ -433,7 +428,7 @@ static struct gpio_desc *of_find_spi_cs_gpio(struct device *dev, * properties should be named "foo-gpios" so we have this special kludge for * them. */ -static struct gpio_desc *of_find_regulator_gpio(struct device *dev, +static struct gpio_desc *of_find_regulator_gpio(struct device_node *np, const char *con_id, unsigned int idx, enum of_gpio_flags *of_flags) @@ -444,8 +439,6 @@ static struct gpio_desc *of_find_regulator_gpio(struct device *dev, "wlf,ldo1ena", /* WM8994 */ "wlf,ldo2ena", /* WM8994 */ }; - const struct device_node *np = dev->of_node; - struct gpio_desc *desc; int i; if (!IS_ENABLED(CONFIG_REGULATOR)) @@ -458,11 +451,10 @@ static struct gpio_desc *of_find_regulator_gpio(struct device *dev, if (i < 0) return ERR_PTR(-ENOENT); - desc = of_get_named_gpiod_flags(np, con_id, idx, of_flags); - return desc; + return of_get_named_gpiod_flags(np, con_id, idx, of_flags); } -static struct gpio_desc *of_find_arizona_gpio(struct device *dev, +static struct gpio_desc *of_find_arizona_gpio(struct device_node *np, const char *con_id, unsigned int idx, enum of_gpio_flags *of_flags) @@ -473,10 +465,10 @@ static struct gpio_desc *of_find_arizona_gpio(struct device *dev, if (!con_id || strcmp(con_id, "wlf,reset")) return ERR_PTR(-ENOENT); - return of_get_named_gpiod_flags(dev->of_node, con_id, idx, of_flags); + return of_get_named_gpiod_flags(np, con_id, idx, of_flags); } -static struct gpio_desc *of_find_usb_gpio(struct device *dev, +static struct gpio_desc *of_find_usb_gpio(struct device_node *np, const char *con_id, unsigned int idx, enum of_gpio_flags *of_flags) @@ -492,14 +484,27 @@ static struct gpio_desc *of_find_usb_gpio(struct device *dev, if (!con_id || strcmp(con_id, "fcs,int_n")) return ERR_PTR(-ENOENT); - return of_get_named_gpiod_flags(dev->of_node, con_id, idx, of_flags); + return of_get_named_gpiod_flags(np, con_id, idx, of_flags); } +typedef struct gpio_desc *(*of_find_gpio_quirk)(struct device_node *np, + const char *con_id, + unsigned int idx, + enum of_gpio_flags *of_flags); +static const of_find_gpio_quirk of_find_gpio_quirks[] = { + of_find_spi_gpio, + of_find_spi_cs_gpio, + of_find_regulator_gpio, + of_find_arizona_gpio, + of_find_usb_gpio, +}; + struct gpio_desc *of_find_gpio(struct device *dev, const char *con_id, unsigned int idx, unsigned long *flags) { char prop_name[32]; /* 32 is max size of property name */ enum of_gpio_flags of_flags; + const of_find_gpio_quirk *q; struct gpio_desc *desc; unsigned int i; @@ -519,24 +524,9 @@ struct gpio_desc *of_find_gpio(struct device *dev, const char *con_id, break; } - if (gpiod_not_found(desc)) { - /* Special handling for SPI GPIOs if used */ - desc = of_find_spi_gpio(dev, con_id, idx, &of_flags); - } - - if (gpiod_not_found(desc)) - desc = of_find_spi_cs_gpio(dev, con_id, idx, &of_flags); - - if (gpiod_not_found(desc)) { - /* Special handling for regulator GPIOs if used */ - desc = of_find_regulator_gpio(dev, con_id, idx, &of_flags); - } - - if (gpiod_not_found(desc)) - desc = of_find_arizona_gpio(dev, con_id, idx, &of_flags); - - if (gpiod_not_found(desc)) - desc = of_find_usb_gpio(dev, con_id, idx, &of_flags); + /* Properly named GPIO was not found, try workarounds */ + for (q = of_find_gpio_quirks; gpiod_not_found(desc) && *q; q++) + desc = (*q)(dev->of_node, con_id, idx, &of_flags); if (IS_ERR(desc)) return desc; -- 2.35.1