From patchwork Sun Mar 21 11:38:43 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Magnus Damm X-Patchwork-Id: 12153003 X-Patchwork-Delegate: geert@linux-m68k.org 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=-13.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=ham 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 3392EC433C1 for ; Sun, 21 Mar 2021 12:13:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 07CB261944 for ; Sun, 21 Mar 2021 12:13:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229886AbhCUMMl (ORCPT ); Sun, 21 Mar 2021 08:12:41 -0400 Received: from lists.levonline.com ([217.70.33.37]:46241 "EHLO lists.levonline.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229863AbhCUMMN (ORCPT ); Sun, 21 Mar 2021 08:12:13 -0400 Received: from exc-halon1.levonline.com (exc-halon1.levonline.com [217.70.32.123]) by lists.levonline.com (Postfix) with ESMTP id 6F27C3A12E2 for ; Sun, 21 Mar 2021 13:12:11 +0100 (CET) X-SA-score: -1 X-Halon-ID: a9ff634c-8a3e-11eb-a51d-0050568168d4 Received: from ormen1.djurnet.levonline.com (ormen1.djurnet.levonline.com [192.168.17.31]) by exc-halon1.levonline.com (Halon) with ESMTPS id a9ff634c-8a3e-11eb-a51d-0050568168d4; Sun, 21 Mar 2021 13:12:11 +0100 (CET) Received: from [127.0.0.1] (l193216.ppp.asahi-net.or.jp [218.219.193.216]) (authenticated bits=0) by ormen1.djurnet.levonline.com (8.13.8/8.13.8) with ESMTP id 12LCC9LU028139; Sun, 21 Mar 2021 13:12:10 +0100 X-Origin-Levonline: b0359001 From: Magnus Damm To: linux-renesas-soc@vger.kernel.org Cc: Magnus Damm , geert+renesas@glider.be Date: Sun, 21 Mar 2021 20:38:43 +0900 Message-Id: <161632672360.9191.17012441985597645272.sendpatchset@octo> In-Reply-To: <161632671592.9191.18170615656272399147.sendpatchset@octo> References: <161632671592.9191.18170615656272399147.sendpatchset@octo> Subject: [PATCH 1/2] sh73a0 CMT1 device exposed via UIO Precedence: bulk List-ID: X-Mailing-List: linux-renesas-soc@vger.kernel.org From: Magnus Damm Modify the kernel slightly to expose CMT1 via UIO and print some IRQ-related messages from UIO for debugging purpose. Not-Yet-Signed-off-by: Magnus Damm --- arch/arm/boot/dts/sh73a0.dtsi | 2 +- drivers/uio/uio.c | 3 ++- drivers/uio/uio_pdrv_genirq.c | 10 ++++++++-- 3 files changed, 11 insertions(+), 4 deletions(-) --- 0001/arch/arm/boot/dts/sh73a0.dtsi +++ work/arch/arm/boot/dts/sh73a0.dtsi 2021-03-21 18:15:44.683760186 +0900 @@ -99,7 +99,7 @@ }; cmt1: timer@e6138000 { - compatible = "renesas,sh73a0-cmt1"; + compatible = "uio_pdrv_genirq"; reg = <0xe6138000 0x200>; interrupts = ; clocks = <&mstp3_clks SH73A0_CLK_CMT1>; --- 0001/drivers/uio/uio.c +++ work/drivers/uio/uio.c 2021-03-21 18:14:34.880755790 +0900 @@ -11,7 +11,7 @@ * * Base Functions */ - +#define DEBUG #include #include #include @@ -975,6 +975,7 @@ int __uio_register_device(struct module * FDs at the time of unregister and therefore may not be * freed until they are released. */ + pr_debug("uio request_irq %lu\n", info->irq); ret = request_irq(info->irq, uio_interrupt, info->irq_flags, info->name, idev); if (ret) { --- 0001/drivers/uio/uio_pdrv_genirq.c +++ work/drivers/uio/uio_pdrv_genirq.c 2021-03-21 18:15:03.120757568 +0900 @@ -10,7 +10,7 @@ * Copyright (C) 2008 by Digi International Inc. * All rights reserved. */ - +#define DEBUG #include #include #include @@ -66,6 +66,8 @@ static irqreturn_t uio_pdrv_genirq_handl * remember the state so we can allow user space to enable it later. */ + pr_debug("irqhandler %d\n", irq); + spin_lock(&priv->lock); if (!__test_and_set_bit(UIO_IRQ_DISABLED, &priv->flags)) disable_irq_nosync(irq); @@ -87,6 +89,8 @@ static int uio_pdrv_genirq_irqcontrol(st * with irq handler on SMP systems. */ + pr_debug("irqcontrol %d\n", irq_on); + spin_lock_irqsave(&priv->lock, flags); if (irq_on) { if (__test_and_clear_bit(UIO_IRQ_DISABLED, &priv->flags)) @@ -172,6 +176,8 @@ static int uio_pdrv_genirq_probe(struct } } + pr_debug("uio irq %lu\n", uioinfo->irq); + if (uioinfo->irq) { struct irq_data *irq_data = irq_get_irq_data(uioinfo->irq); @@ -276,7 +282,7 @@ static const struct dev_pm_ops uio_pdrv_ #ifdef CONFIG_OF static struct of_device_id uio_of_genirq_match[] = { - { /* This is filled with module_parm */ }, + { .compatible = "uio_pdrv_genirq", }, { /* Sentinel */ }, }; MODULE_DEVICE_TABLE(of, uio_of_genirq_match);