From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S941693AbcIHL6j (ORCPT ); Thu, 8 Sep 2016 07:58:39 -0400 Received: from down.free-electrons.com ([37.187.137.238]:51789 "EHLO mail.free-electrons.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S932809AbcIHL5d (ORCPT ); Thu, 8 Sep 2016 07:57:33 -0400 From: Alexandre Belloni To: Nicolas Ferre , Boris Brezillon , Stephen Boyd Cc: Michael Turquette , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-clk@vger.kernel.org, Alexandre Belloni Subject: [PATCH 5/5] clk: at91: sckc: optimize boot time Date: Thu, 8 Sep 2016 13:57:23 +0200 Message-Id: <20160908115723.11878-6-alexandre.belloni@free-electrons.com> X-Mailer: git-send-email 2.9.3 In-Reply-To: <20160908115723.11878-1-alexandre.belloni@free-electrons.com> References: <20160908115723.11878-1-alexandre.belloni@free-electrons.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Assume that if the oscillator is enabled (OSC32EN bit is present), the delay has already elapsed as the bootloader probably waited for the oscillator to settle. This could waste up to 1.2s. Signed-off-by: Alexandre Belloni --- drivers/clk/at91/sckc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/clk/at91/sckc.c b/drivers/clk/at91/sckc.c index 88907c48092b..b0a41170309f 100644 --- a/drivers/clk/at91/sckc.c +++ b/drivers/clk/at91/sckc.c @@ -69,7 +69,7 @@ static int clk_slow_osc_prepare(struct clk_hw *hw) void __iomem *sckcr = osc->sckcr; u32 tmp = readl(sckcr); - if (tmp & AT91_SCKC_OSC32BYP) + if (tmp & (AT91_SCKC_OSC32BYP | AT91_SCKC_OSC32EN)) return 0; writel(tmp | AT91_SCKC_OSC32EN, sckcr); -- 2.9.3