From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S966201AbcIHOwX (ORCPT ); Thu, 8 Sep 2016 10:52:23 -0400 Received: from down.free-electrons.com ([37.187.137.238]:60550 "EHLO mail.free-electrons.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S966074AbcIHOwT (ORCPT ); Thu, 8 Sep 2016 10:52:19 -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 v2 5/5] clk: at91: sckc: optimize boot time Date: Thu, 8 Sep 2016 16:51:46 +0200 Message-Id: <20160908145146.20422-6-alexandre.belloni@free-electrons.com> X-Mailer: git-send-email 2.9.3 In-Reply-To: <20160908145146.20422-1-alexandre.belloni@free-electrons.com> References: <20160908145146.20422-1-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 04059ea761c2..d669f5ca4dac 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