From nobody Thu Nov 14 18:43:39 2024 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 7F718C433FE for ; Tue, 18 Oct 2022 05:42:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230513AbiJRFmV (ORCPT ); Tue, 18 Oct 2022 01:42:21 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38254 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230389AbiJRFl6 (ORCPT ); Tue, 18 Oct 2022 01:41:58 -0400 Received: from mail-pl1-x629.google.com (mail-pl1-x629.google.com [IPv6:2607:f8b0:4864:20::629]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D0C789E2E9; Mon, 17 Oct 2022 22:41:35 -0700 (PDT) Received: by mail-pl1-x629.google.com with SMTP id 10so12876793pli.0; Mon, 17 Oct 2022 22:41:35 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=4G7tl3tu203DyVK2JSTYCp8XTOzlUsDNSnxbzKDtrDc=; b=DY8rsTzt3XFTA3ilefLgkcsB8eFjSt+06weMni51hOasFmIa7Jotx4YgXvtmEAbbDx UPbF2b01JU/WPhhYVVgi7BdTUOk0oJ5LlzsyQb6967vDVgogm+zZwTUawXfemy0JCcSU 2jplFegk3aDg4yURx0rzogEtqpYN2xZh/8kYwB297rEnsQzASNl19AuUJiDFQ9svKcub rAcoQ++Y1eKWirRU5LruBEIcYZLfwu6zso0C7oogfa/o/vGd4cr05NBVUL2Jsg8mOI9i MncnVg6O8Uj4+AqllFDOgKhdPwVIH09TmVo2O62iPN7KoLh4EGoQUb0hXT7aPtibgcCt CZpQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=4G7tl3tu203DyVK2JSTYCp8XTOzlUsDNSnxbzKDtrDc=; b=7RbL3BNhbRZ1w/ZkmvSMaYlv1v8UqnNVR7k4mocmcpxwUubQDn5lsm4O7AP9sXTsqM TZ2VR1DOHmKWdtCOkQkLY7MyEjPyJWlnj7stqeiI6D6eqKD72ePScS3BkxGLIU2Gygh4 TcYiAf68s66k0k4tE08Xy6XuRQlN3rx6AxqD/aOJQ7taNdaiwVfBoNoSgrC+2fPJIGvS Qa7DnEHj+9x2GxyOOyYZ+/kfTrDVs/x4M7npPsTGH4mJTisCkINpH3WaYfINtwxSJoJI Wvjjnz3QJH91qR2Zv3aKr877xDSrcRbTwH9ht2OPct9+XGXalmI/RM/7Lfjubnb478n6 +ZPg== X-Gm-Message-State: ACrzQf1+veoF0WCxQ4iCcbvaY9xPlRAMsFIvCuIbyFhKJM4NVnlTEA9n CQP/uvQxcqZBVdlcU1H4xp8= X-Google-Smtp-Source: AMsMyM5aCgV2chNKlAxGvAIPaU6HYil84zewpav+AIFvUMP05smKopj/ebnWwPFQRHb0YwRVY+VLQw== X-Received: by 2002:a17:90b:4f4e:b0:20d:9f5b:abbf with SMTP id pj14-20020a17090b4f4e00b0020d9f5babbfmr1748885pjb.148.1666071694222; Mon, 17 Oct 2022 22:41:34 -0700 (PDT) Received: from dtor-ws.mtv.corp.google.com ([2620:15c:9d:2:f7bc:1bb5:e0b1:92cb]) by smtp.gmail.com with ESMTPSA id z7-20020a1709027e8700b00172f4835f53sm7597435pla.192.2022.10.17.22.41.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 17 Oct 2022 22:41:33 -0700 (PDT) From: Dmitry Torokhov To: Bartosz Golaszewski , Linus Walleij Cc: Alexander Stein , linux-arm-kernel@lists.infradead.org, linux-gpio@vger.kernel.org, Andy Shevchenko , Daniel Thompson , linux-kernel@vger.kernel.org, linux-mediatek@lists.infradead.org Subject: [PATCH v3 10/10] gpiolib: of: add a quirk for reset line polarity for Himax LCDs Date: Mon, 17 Oct 2022 22:41:11 -0700 Message-Id: <20221011-gpiolib-quirks-v3-10-eae9cc2ed0a1@gmail.com> X-Mailer: git-send-email 2.38.0.413.g74048e4d9e-goog In-Reply-To: <20221011-gpiolib-quirks-v3-0-eae9cc2ed0a1@gmail.com> References: <20221011-gpiolib-quirks-v3-0-eae9cc2ed0a1@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" X-Mailer: b4 0.11.0-dev-5166b Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Existing DTS that use legacy (non-standard) property name for the reset line "gpios-reset" also specify incorrect polarity (0 which maps to "active high"). Add a quirk to force polarity to "active low" so that once driver is converted to gpiod API that pays attention to line polarity it will work properly. Reviewed-by: Linus Walleij Signed-off-by: Dmitry Torokhov --- drivers/gpio/gpiolib-of.c | 36 ++++++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) diff --git a/drivers/gpio/gpiolib-of.c b/drivers/gpio/gpiolib-of.c index c2a55ffb2b20..52616848a37c 100644 --- a/drivers/gpio/gpiolib-of.c +++ b/drivers/gpio/gpiolib-of.c @@ -152,11 +152,47 @@ static void of_gpio_quirk_polarity(const struct devic= e_node *np, } } =20 +/* + * This quirk does static polarity overrides in cases where existing + * DTS specified incorrect polarity. + */ +static void of_gpio_try_fixup_polarity(const struct device_node *np, + const char *propname, + enum of_gpio_flags *flags) +{ + static const struct { + const char *compatible; + const char *propname; + bool active_high; + } gpios[] =3D { +#if !IS_ENABLED(CONFIG_LCD_HX8357) + /* + * Himax LCD controllers used incorrectly named + * "gpios-reset" property and also specified wrong + * polarity. + */ + { "himax,hx8357", "gpios-reset", false }, + { "himax,hx8369", "gpios-reset", false }, +#endif + }; + unsigned int i; + + for (i =3D 0; i < ARRAY_SIZE(gpios); i++) { + if (of_device_is_compatible(np, gpios[i].compatible) && + !strcmp(propname, gpios[i].propname)) { + of_gpio_quirk_polarity(np, gpios[i].active_high, flags); + break; + } + } +} + static void of_gpio_flags_quirks(const struct device_node *np, const char *propname, enum of_gpio_flags *flags, int index) { + of_gpio_try_fixup_polarity(np, propname, flags); + /* * Some GPIO fixed regulator quirks. * Note that active low is the default. --=20 b4 0.11.0-dev-5166b