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 X-Spam-Level: X-Spam-Status: No, score=-10.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 9BE3DC5ACAE for ; Wed, 11 Sep 2019 10:02:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7C39E20CC7 for ; Wed, 11 Sep 2019 10:02:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727270AbfIKKCu (ORCPT ); Wed, 11 Sep 2019 06:02:50 -0400 Received: from inva021.nxp.com ([92.121.34.21]:58292 "EHLO inva021.nxp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726579AbfIKKCu (ORCPT ); Wed, 11 Sep 2019 06:02:50 -0400 Received: from inva021.nxp.com (localhost [127.0.0.1]) by inva021.eu-rdc02.nxp.com (Postfix) with ESMTP id B820F2005B1; Wed, 11 Sep 2019 12:02:47 +0200 (CEST) Received: from invc005.ap-rdc01.nxp.com (invc005.ap-rdc01.nxp.com [165.114.16.14]) by inva021.eu-rdc02.nxp.com (Postfix) with ESMTP id A98AF200022; Wed, 11 Sep 2019 12:02:42 +0200 (CEST) Received: from titan.ap.freescale.net (TITAN.ap.freescale.net [10.192.208.233]) by invc005.ap-rdc01.nxp.com (Postfix) with ESMTP id 2F9EF402AE; Wed, 11 Sep 2019 18:02:36 +0800 (SGT) From: Hui Song To: Shawn Guo , Li Yang , Rob Herring , Mark Rutland , Linus Walleij , Bartosz Golaszewski Cc: linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org, Song Hui Subject: [PATCH] gpio/mpc8xxx: change irq handler from chained to normal Date: Wed, 11 Sep 2019 17:52:27 +0800 Message-Id: <20190911095227.16003-1-hui.song_1@nxp.com> X-Mailer: git-send-email 2.9.5 X-Virus-Scanned: ClamAV using ClamSMTP Sender: linux-gpio-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org From: Song Hui More than one gpio controllers can share one interrupt, change the driver to request shared irq. Signed-off-by: Laurentiu Tudor Signed-off-by: Alex Marginean Signed-off-by: Song Hui --- Changes in v4: - convert 'pr_err' to 'dev_err'. Changes in v3: - update the patch description. Changes in v2: - delete the compatible of ls1088a. drivers/gpio/gpio-mpc8xxx.c | 22 ++++++++++++++-------- 1 file changed, 14 insertions(+), 8 deletions(-) diff --git a/drivers/gpio/gpio-mpc8xxx.c b/drivers/gpio/gpio-mpc8xxx.c index 16a47de..e16591b 100644 --- a/drivers/gpio/gpio-mpc8xxx.c +++ b/drivers/gpio/gpio-mpc8xxx.c @@ -22,6 +22,7 @@ #include #include #include +#include #define MPC8XXX_GPIO_PINS 32 @@ -127,10 +128,9 @@ static int mpc8xxx_gpio_to_irq(struct gpio_chip *gc, unsigned offset) return -ENXIO; } -static void mpc8xxx_gpio_irq_cascade(struct irq_desc *desc) +static irqreturn_t mpc8xxx_gpio_irq_cascade(int irq, void *data) { - struct mpc8xxx_gpio_chip *mpc8xxx_gc = irq_desc_get_handler_data(desc); - struct irq_chip *chip = irq_desc_get_chip(desc); + struct mpc8xxx_gpio_chip *mpc8xxx_gc = (struct mpc8xxx_gpio_chip *)data; struct gpio_chip *gc = &mpc8xxx_gc->gc; unsigned int mask; @@ -139,8 +139,8 @@ static void mpc8xxx_gpio_irq_cascade(struct irq_desc *desc) if (mask) generic_handle_irq(irq_linear_revmap(mpc8xxx_gc->irq, 32 - ffs(mask))); - if (chip->irq_eoi) - chip->irq_eoi(&desc->irq_data); + + return IRQ_HANDLED; } static void mpc8xxx_irq_unmask(struct irq_data *d) @@ -388,7 +388,7 @@ static int mpc8xxx_probe(struct platform_device *pdev) ret = gpiochip_add_data(gc, mpc8xxx_gc); if (ret) { - pr_err("%pOF: GPIO chip registration failed with status %d\n", + dev_err("%pOF: GPIO chip registration failed with status %d\n", np, ret); goto err; } @@ -409,8 +409,14 @@ static int mpc8xxx_probe(struct platform_device *pdev) if (devtype->gpio_dir_in_init) devtype->gpio_dir_in_init(gc); - irq_set_chained_handler_and_data(mpc8xxx_gc->irqn, - mpc8xxx_gpio_irq_cascade, mpc8xxx_gc); + ret = request_irq(mpc8xxx_gc->irqn, mpc8xxx_gpio_irq_cascade, + IRQF_NO_THREAD | IRQF_SHARED, "gpio-cascade", mpc8xxx_gc); + if (ret) { + dev_err("%s: failed to request_irq(%d), ret = %d\n", + np->full_name, mpc8xxx_gc->irqn, ret); + goto err; + } + return 0; err: iounmap(mpc8xxx_gc->regs); -- 2.9.5