From patchwork Thu Jul 11 16:31:21 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maxime Ripard X-Patchwork-Id: 2826555 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 446CB9F756 for ; Thu, 11 Jul 2013 16:37:33 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id C6DE520352 for ; Thu, 11 Jul 2013 16:37:31 +0000 (UTC) Received: from casper.infradead.org (casper.infradead.org [85.118.1.10]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 042B220347 for ; Thu, 11 Jul 2013 16:37:30 +0000 (UTC) Received: from merlin.infradead.org ([2001:4978:20e::2]) by casper.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1UxJoQ-0003hT-9F; Thu, 11 Jul 2013 16:33:47 +0000 Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1UxJnk-0004mO-9f; Thu, 11 Jul 2013 16:33:04 +0000 Received: from mail.free-electrons.com ([94.23.35.102]) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1UxJn1-0004gz-Eg for linux-arm-kernel@lists.infradead.org; Thu, 11 Jul 2013 16:32:23 +0000 Received: by mail.free-electrons.com (Postfix, from userid 106) id 846EDBFD; Thu, 11 Jul 2013 18:31:39 +0200 (CEST) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Spam-Level: X-Spam-Status: No, score=-4.5 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 Received: from localhost (189.58.26.109.rev.sfr.net [109.26.58.189]) by mail.free-electrons.com (Postfix) with ESMTPSA id 752D6C17; Thu, 11 Jul 2013 18:31:39 +0200 (CEST) From: Maxime Ripard To: John Stultz , Thomas Gleixner Subject: [PATCHv5 09/10] clocksource: sun4i: Cleanup parent clock setup Date: Thu, 11 Jul 2013 18:31:21 +0200 Message-Id: <1373560282-15184-10-git-send-email-maxime.ripard@free-electrons.com> X-Mailer: git-send-email 1.8.3.2 In-Reply-To: <1373560282-15184-1-git-send-email-maxime.ripard@free-electrons.com> References: <1373560282-15184-1-git-send-email-maxime.ripard@free-electrons.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20130711_123219_929518_1B6B8620 X-CRM114-Status: GOOD ( 11.02 ) X-Spam-Score: -2.2 (--) Cc: Emilio Lopez , linux-kernel@vger.kernel.org, linux-sunxi@googlegroups.com, kevin.z.m.zh@gmail.com, sunny@allwinnertech.com, shuge@allwinnertech.com, Maxime Ripard , linux-arm-kernel@lists.infradead.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP The current bring-up code for the timer was overly complicated. The only thing we need is actually which clock we want to use as source and that's pretty much all. Let's keep it that way. Signed-off-by: Maxime Ripard --- drivers/clocksource/sun4i_timer.c | 15 +++++---------- 1 file changed, 5 insertions(+), 10 deletions(-) diff --git a/drivers/clocksource/sun4i_timer.c b/drivers/clocksource/sun4i_timer.c index 3217adc..2fadb3b 100644 --- a/drivers/clocksource/sun4i_timer.c +++ b/drivers/clocksource/sun4i_timer.c @@ -30,6 +30,9 @@ #define TIMER_CTL_REG(val) (0x10 * val + 0x10) #define TIMER_CTL_ENABLE BIT(0) #define TIMER_CTL_RELOAD BIT(1) +#define TIMER_CTL_CLK_SRC(val) (((val) & 0x3) << 2) +#define TIMER_CTL_CLK_SRC_OSC24M (1) +#define TIMER_CTL_CLK_PRES(val) (((val) & 0x7) << 4) #define TIMER_CTL_ONESHOT BIT(7) #define TIMER_INTVAL_REG(val) (0x10 * (val) + 0x14) #define TIMER_CNTVAL_REG(val) (0x10 * (val) + 0x18) @@ -168,16 +171,8 @@ static void __init sun4i_timer_init(struct device_node *node) writel(rate / HZ, timer_base + TIMER_INTVAL_REG(0)); - /* set clock source to HOSC, 16 pre-division */ - val = readl(timer_base + TIMER_CTL_REG(0)); - val &= ~(0x07 << 4); - val &= ~(0x03 << 2); - val |= (4 << 4) | (1 << 2); - writel(val, timer_base + TIMER_CTL_REG(0)); - - /* set mode to auto reload */ - val = readl(timer_base + TIMER_CTL_REG(0)); - writel(val | TIMER_CTL_RELOAD, timer_base + TIMER_CTL_REG(0)); + writel(TIMER_CTL_CLK_SRC(TIMER_CTL_CLK_SRC_OSC24M) | TIMER_CTL_RELOAD, + timer_base + TIMER_CTL_REG(0)); ret = setup_irq(irq, &sun4i_timer_irq); if (ret)