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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8231FC7618E for ; Fri, 21 Apr 2023 03:47:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233569AbjDUDrp (ORCPT ); Thu, 20 Apr 2023 23:47:45 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45310 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229521AbjDUDrl (ORCPT ); Thu, 20 Apr 2023 23:47:41 -0400 Received: from mailgw02.mediatek.com (unknown [210.61.82.184]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2BB951FC0 for ; Thu, 20 Apr 2023 20:47:36 -0700 (PDT) X-UUID: 3da494fedff711edb6b9f13eb10bd0fe-20230421 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Type:MIME-Version:Message-ID:Date:Subject:CC:To:From; bh=9fA4Q8Eu/7r79+HGr+WgcfxZUyDhzDjsfyrl60cGNPw=; b=Kn+c0UUocb5x4sQmKbZafj4CMN/YtG+1dGJO1uomfLVho/KPIgdMcWn6P+a7m2ptvA+m+KNymg5pVikkP4Lj6m3EYRVGkJPW8nP25wSeQoO8foqu9ZH26pVa0+GHdKcbf5ePd0v/l5GeDJZLnLItcZ7h8AuXknmaRfRXKp01P8w=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.22,REQID:2f1a9738-c871-4ba4-a4f8-949559ec3d4e,IP:0,U RL:0,TC:0,Content:-25,EDM:0,RT:0,SF:95,FILE:0,BULK:0,RULE:Release_Ham,ACTI ON:release,TS:70 X-CID-INFO: VERSION:1.1.22,REQID:2f1a9738-c871-4ba4-a4f8-949559ec3d4e,IP:0,URL :0,TC:0,Content:-25,EDM:0,RT:0,SF:95,FILE:0,BULK:0,RULE:Spam_GS981B3D,ACTI ON:quarantine,TS:70 X-CID-META: VersionHash:120426c,CLOUDID:d8680ba2-8fcb-430b-954a-ba3f00fa94a5,B ulkID:230421114731BRI4OOTO,BulkQuantity:0,Recheck:0,SF:48|38|29|28|17|19,T C:nil,Content:0,EDM:-3,IP:nil,URL:1,File:nil,Bulk:nil,QS:nil,BEC:nil,COL:0 ,OSI:0,OSA:0,AV:0 X-CID-BVR: 0 X-CID-BAS: 0,_,0,_ X-UUID: 3da494fedff711edb6b9f13eb10bd0fe-20230421 Received: from mtkmbs10n1.mediatek.inc [(172.21.101.34)] by mailgw02.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 1517359952; Fri, 21 Apr 2023 11:47:30 +0800 Received: from mtkmbs13n2.mediatek.inc (172.21.101.108) by mtkmbs10n1.mediatek.inc (172.21.101.34) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.25; Fri, 21 Apr 2023 11:47:28 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkmbs13n2.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.1118.25 via Frontend Transport; Fri, 21 Apr 2023 11:47:28 +0800 From: To: Daniel Lezcano , Thomas Gleixner , Matthias Brugger , AngeloGioacchino Del Regno , "Maciej W . Rozycki" , John Stultz CC: , , , , , , , Subject: [PATCH linux-next v4 0/4] Support timer drivers as loadable modules Date: Fri, 21 Apr 2023 11:46:45 +0800 Message-ID: <20230421034649.15247-1-walter.chang@mediatek.com> X-Mailer: git-send-email 2.18.0 MIME-Version: 1.0 Content-Type: text/plain Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Walter Chang This set of patches aims to make SoC related timer drivers, such as timer-mediatek.c become loadable modules for the Generic Kernel Image (GKI). This driver registers an always-on timer as tick_broadcast_device on MediaTek SoCs. If the system does not load this module at startup, system will also boot normally by using built-in `bc_hrtimer` instead. Besides, the previous experiment [1] indicates that the SYST/GPT, in combination with a loadable module, is fully operational. The first three patches export functions and remove __init markings to support loadable timer modules. The fourth patch makes timer-mediatek.c become loadable module for GKI. [1] https://lore.kernel.org/all/32777456f8e0f98e4cd5b950f421d21f71b149cf.camel@mediatek.com/#t [v4] - Fix review comments pointed by Angelo [v3] - Rebase on linux-next [v2] - Convert timer-mediatek.c driver to loadable module Chun-Hung Wu (4): time/sched_clock: Export sched_clock_register() clocksource/drivers/mmio: Export clocksource_mmio_init() clocksource/drivers/timer-of: Remove __init markings clocksource/drivers/timer-mediatek: Make timer-mediatek become loadable module drivers/clocksource/Kconfig | 2 +- drivers/clocksource/mmio.c | 8 ++++--- drivers/clocksource/timer-mediatek.c | 33 ++++++++++++++++++++++++++++ drivers/clocksource/timer-of.c | 23 +++++++++---------- drivers/clocksource/timer-of.h | 6 ++--- kernel/time/sched_clock.c | 4 ++-- 6 files changed, 56 insertions(+), 20 deletions(-) -- 2.18.0