From patchwork Fri May 1 07:43:26 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yingjoe Chen X-Patchwork-Id: 6308921 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 75289BEEE5 for ; Fri, 1 May 2015 07:47:58 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 9F320203F1 for ; Fri, 1 May 2015 07:47:57 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id C3C402045A for ; Fri, 1 May 2015 07:47:56 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1Yo5dn-0001mJ-R0; Fri, 01 May 2015 07:45:43 +0000 Received: from [210.61.82.184] (helo=mailgw02.mediatek.com) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1Yo5cr-0008Vm-M7; Fri, 01 May 2015 07:44:46 +0000 X-Listener-Flag: 11101 Received: from mtkhts07.mediatek.inc [(172.21.101.69)] by mailgw02.mediatek.com (envelope-from ) (mhqrelay.mediatek.com ESMTP with TLS) with ESMTP id 349816637; Fri, 01 May 2015 15:44:20 +0800 Received: from mtksdtcf02.mediatek.inc (10.21.12.142) by mtkhts07.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 14.3.181.6; Fri, 1 May 2015 15:44:18 +0800 From: Yingjoe Chen To: Mark Rutland , Matthias Brugger , Thomas Gleixner , Arnd Bergmann , Olof Johansson Subject: [PATCH 3/7] arm: mediatek: enable gpt6 on boot up to make arch timer working Date: Fri, 1 May 2015 15:43:26 +0800 Message-ID: <1430466210-22963-4-git-send-email-yingjoe.chen@mediatek.com> X-Mailer: git-send-email 1.8.1.1.dirty In-Reply-To: <1430466210-22963-1-git-send-email-yingjoe.chen@mediatek.com> References: <1430466210-22963-1-git-send-email-yingjoe.chen@mediatek.com> MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20150501_004445_981262_3FC34CB8 X-CRM114-Status: UNSURE ( 9.06 ) X-CRM114-Notice: Please train this message. X-Spam-Score: 1.3 (+) Cc: devicetree@vger.kernel.org, Lorenzo Pieralisi , Russell King , Jason Cooper , Pawel Moll , Ian Campbell , Catalin Marinas , Daniel Lezcano , linux-kernel@vger.kernel.org, Marc Carino , Rob Herring , linux-mediatek@lists.infradead.org, Sascha Hauer , Yingjoe Chen , srv_heupstream@mediatek.com, linux-arm-kernel@lists.infradead.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, T_RP_MATCHES_RCVD,UNPARSEABLE_RELAY autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Matthias Brugger We enable GTP6 which ungates the arch timer clock. In the future this should be done in the bootloader. Signed-off-by: Matthias Brugger Signed-off-by: Yingjoe Chen --- arch/arm/mach-mediatek/mediatek.c | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) diff --git a/arch/arm/mach-mediatek/mediatek.c b/arch/arm/mach-mediatek/mediatek.c index a954900..6b38d67 100644 --- a/arch/arm/mach-mediatek/mediatek.c +++ b/arch/arm/mach-mediatek/mediatek.c @@ -16,6 +16,34 @@ */ #include #include +#include +#include +#include + + +#define GPT6_CON_MT65xx 0x10008060 +#define GPT_ENABLE 0x31 + +static void __init mediatek_timer_init(void) +{ + void __iomem *gpt_base = 0; + + if (of_machine_is_compatible("mediatek,mt6589") || + of_machine_is_compatible("mediatek,mt8135") || + of_machine_is_compatible("mediatek,mt8127")) { + /* turn on GPT6 which ungates arch timer clocks */ + gpt_base = ioremap(GPT6_CON_MT65xx, 0x04); + } + + /* enabel clock and set to free-run */ + if (gpt_base) { + writel(GPT_ENABLE, gpt_base); + iounmap(gpt_base); + } + + of_clk_init(NULL); + clocksource_of_init(); +}; static const char * const mediatek_board_dt_compat[] = { "mediatek,mt6589", @@ -27,4 +55,5 @@ static const char * const mediatek_board_dt_compat[] = { DT_MACHINE_START(MEDIATEK_DT, "Mediatek Cortex-A7 (Device Tree)") .dt_compat = mediatek_board_dt_compat, + .init_time = mediatek_timer_init, MACHINE_END