From patchwork Tue Sep 1 15:08:50 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 264633 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-13.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 55BDEC433E6 for ; Tue, 1 Sep 2020 16:09:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 23D01204EC for ; Tue, 1 Sep 2020 16:09:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598976563; bh=Kk3qI+Uu8rYTK9R5dVA5Wc5qfiL9u6E1/uI2nhKLEWk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=HffdIRY6Z97TRQYhvkCPeRrzjWZannTF2NwevPBb/m/ZDSMw+POLS0lz6CC7YtQR9 JNcHz8yuvZDdJtXxdPIqAsAnBPxInszceGjN8TN0ZdWaFrRHjcoj/XOwwFHi0RfBqo ITqezUXAqDM6OBpLk5zTEHRJHyRldrdBO8G8Ojls= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728197AbgIAPjA (ORCPT ); Tue, 1 Sep 2020 11:39:00 -0400 Received: from mail.kernel.org ([198.145.29.99]:48366 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729985AbgIAPi5 (ORCPT ); Tue, 1 Sep 2020 11:38:57 -0400 Received: from localhost (83-86-74-64.cable.dynamic.v4.ziggo.nl [83.86.74.64]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 1C25220E65; Tue, 1 Sep 2020 15:38:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1598974736; bh=Kk3qI+Uu8rYTK9R5dVA5Wc5qfiL9u6E1/uI2nhKLEWk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=pGoHAsBBuSvi1Y8usEjPOYLqpHWvcufJha6vSiRWkI+KCoZe1F+phirSICLWr46W5 es+wINxUY/X7NU9Rcj7vSsy5GSg/qTWuWv1kt2W65IJznova2ynCMrxn3NPYdA/1Bw 1iN3sNAd++uJkyoOMZ8j2767Xh9Lm1pUIY+avWeI= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Mars Cheng , Hanks Chen , Sean Wang , Linus Walleij , Sasha Levin Subject: [PATCH 5.8 074/255] pinctrl: mediatek: avoid virtual gpio trying to set reg Date: Tue, 1 Sep 2020 17:08:50 +0200 Message-Id: <20200901151004.278233283@linuxfoundation.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200901151000.800754757@linuxfoundation.org> References: <20200901151000.800754757@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Hanks Chen [ Upstream commit edd546465002621665a3a275abe908a30efdce5b ] for virtual gpios, they should not do reg setting and should behave as expected for eint function. Signed-off-by: Mars Cheng Signed-off-by: Hanks Chen Acked-by: Sean Wang Link: https://lore.kernel.org/r/1595503197-15246-4-git-send-email-hanks.chen@mediatek.com Signed-off-by: Linus Walleij Signed-off-by: Sasha Levin --- .../pinctrl/mediatek/pinctrl-mtk-common-v2.c | 25 +++++++++++++++++++ .../pinctrl/mediatek/pinctrl-mtk-common-v2.h | 1 + drivers/pinctrl/mediatek/pinctrl-paris.c | 7 ++++++ 3 files changed, 33 insertions(+) diff --git a/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c b/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c index b77b18fe5adcf..c53e2c391e32b 100644 --- a/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c +++ b/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c @@ -243,6 +243,28 @@ static int mtk_xt_find_eint_num(struct mtk_pinctrl *hw, unsigned long eint_n) return EINT_NA; } +/* + * Virtual GPIO only used inside SOC and not being exported to outside SOC. + * Some modules use virtual GPIO as eint (e.g. pmif or usb). + * In MTK platform, external interrupt (EINT) and GPIO is 1-1 mapping + * and we can set GPIO as eint. + * But some modules use specific eint which doesn't have real GPIO pin. + * So we use virtual GPIO to map it. + */ + +bool mtk_is_virt_gpio(struct mtk_pinctrl *hw, unsigned int gpio_n) +{ + const struct mtk_pin_desc *desc; + bool virt_gpio = false; + + desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio_n]; + + if (desc->funcs && !desc->funcs[desc->eint.eint_m].name) + virt_gpio = true; + + return virt_gpio; +} + static int mtk_xt_get_gpio_n(void *data, unsigned long eint_n, unsigned int *gpio_n, struct gpio_chip **gpio_chip) @@ -295,6 +317,9 @@ static int mtk_xt_set_gpio_as_eint(void *data, unsigned long eint_n) if (err) return err; + if (mtk_is_virt_gpio(hw, gpio_n)) + return 0; + desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio_n]; err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_MODE, diff --git a/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.h b/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.h index 27df087363960..bd079f4fb1d6f 100644 --- a/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.h +++ b/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.h @@ -315,4 +315,5 @@ int mtk_pinconf_adv_drive_set(struct mtk_pinctrl *hw, int mtk_pinconf_adv_drive_get(struct mtk_pinctrl *hw, const struct mtk_pin_desc *desc, u32 *val); +bool mtk_is_virt_gpio(struct mtk_pinctrl *hw, unsigned int gpio_n); #endif /* __PINCTRL_MTK_COMMON_V2_H */ diff --git a/drivers/pinctrl/mediatek/pinctrl-paris.c b/drivers/pinctrl/mediatek/pinctrl-paris.c index 90a432bf9fedc..a23c18251965e 100644 --- a/drivers/pinctrl/mediatek/pinctrl-paris.c +++ b/drivers/pinctrl/mediatek/pinctrl-paris.c @@ -769,6 +769,13 @@ static int mtk_gpio_get_direction(struct gpio_chip *chip, unsigned int gpio) if (gpio >= hw->soc->npins) return -EINVAL; + /* + * "Virtual" GPIOs are always and only used for interrupts + * Since they are only used for interrupts, they are always inputs + */ + if (mtk_is_virt_gpio(hw, gpio)) + return 1; + desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio]; err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_DIR, &value);