From patchwork Mon Dec 5 13:40:31 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Quentin Schulz X-Patchwork-Id: 631202 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 DB0DBC4708C for ; Mon, 5 Dec 2022 13:41:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231753AbiLENla (ORCPT ); Mon, 5 Dec 2022 08:41:30 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34648 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232143AbiLENl2 (ORCPT ); Mon, 5 Dec 2022 08:41:28 -0500 Received: from relay9-d.mail.gandi.net (relay9-d.mail.gandi.net [217.70.183.199]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4A5011CFDB; Mon, 5 Dec 2022 05:41:27 -0800 (PST) Received: (Authenticated sender: foss@0leil.net) by mail.gandi.net (Postfix) with ESMTPSA id 79BC4FF811; Mon, 5 Dec 2022 13:41:14 +0000 (UTC) From: Quentin Schulz To: Samuel Holland , Bastien Nocera , =?utf-8?q?Guido_G=C3=BCnther?= , Sascha Hauer , Pengutronix Kernel Team , Angus Ainslie , Ondrej Jirman , Icenowy Zheng , Andy Gross , Aleksei Mamlin , Fabio Estevam , David Jander , Frieder Schrempf , Bjorn Andersson , Konrad Dybcio , Peter Geis , Heiko Stuebner , Shawn Guo , Jernej Skrabec , Lukasz Majewski , AngeloGioacchino Del Regno , Chen-Yu Tsai , Michael Riesch , Rob Herring , NXP Linux Team , Dmitry Torokhov , Hans de Goede , Jagan Teki , Krzysztof Kozlowski Cc: Quentin Schulz , linux-input@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-sunxi@lists.linux.dev, devicetree@vger.kernel.org, linux-rockchip@lists.infradead.org Subject: [PATCH v3 2/9] Input: goodix - make gpiod_get honor GPIOD_ASIS Date: Mon, 5 Dec 2022 14:40:31 +0100 Message-Id: <20221103-upstream-goodix-reset-v3-2-0975809eb183@theobroma-systems.com> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221103-upstream-goodix-reset-v3-0-0975809eb183@theobroma-systems.com> References: <20221103-upstream-goodix-reset-v3-0-0975809eb183@theobroma-systems.com> MIME-Version: 1.0 X-Mailer: b4 0.10.1 Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org From: Quentin Schulz For some reason the ACPI GPIO lookup code (acpi_find_gpio followed by acpi_gpio_update_gpiod_flags) will override the gpiod_flags passed to gpiod_get() if it can determine a set of flags from the ACPI GpioIo entry. For output pins like the reset pin, this requires a pull bias to be set, which often is not the case, so then the GPIOD_ASIS which we pass in is used. But if a pull bias is specified in the ACPI GpioIo entry for the reset pin then that gets translated to GPIOD_OUT_LOW or GPIOD_OUT_HIGH meaning we cannot guarantee the same behavior on all boards. So this may cause unintended side-effects, c.f. commit a2fd46cd3dbb ("Input: goodix - try not to touch the reset-pin on x86/ACPI devices") for some background. This is something which we can fix though, we can force the ACPI GPIO code to honor the GPIOD_ASIS we pass in by passing ACPI_GPIO_QUIRK_NO_IO_RESTRICTION to the ACPI gpio mapping. Suggested-by: Hans de Goede Signed-off-by: Quentin Schulz --- drivers/input/touchscreen/goodix.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/input/touchscreen/goodix.c b/drivers/input/touchscreen/goodix.c index d73d4272a8ea5..1639f2f8a31e3 100644 --- a/drivers/input/touchscreen/goodix.c +++ b/drivers/input/touchscreen/goodix.c @@ -803,6 +803,7 @@ static int goodix_reset(struct goodix_ts_data *ts) .name = _name, \ .data = _params, \ .size = _size, \ + .quirks = ACPI_GPIO_QUIRK_NO_IO_RESTRICTION, \ } static const struct acpi_gpio_params first_gpio = { 0, 0, false };