From mboxrd@z Thu Jan 1 00:00:00 1970 From: Paul Walmsley Subject: [PATCH E 06/14] PM: OMAP3: Make sure clk_disable_unused() order is correct Date: Wed, 28 Jan 2009 12:27:45 -0700 Message-ID: <20090128192742.29333.70826.stgit@localhost.localdomain> References: <20090128192551.29333.82943.stgit@localhost.localdomain> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Return-path: Received: from utopia.booyaka.com ([72.9.107.138]:32927 "EHLO utopia.booyaka.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755387AbZA1U33 (ORCPT ); Wed, 28 Jan 2009 15:29:29 -0500 In-Reply-To: <20090128192551.29333.82943.stgit@localhost.localdomain> Sender: linux-omap-owner@vger.kernel.org List-Id: linux-omap@vger.kernel.org To: linux-arm-kernel@lists.arm.linux.org.uk, linux-kernel@vger.kernel.org Cc: linux-omap@vger.kernel.org, Tero Kristo , Kevin Hilman From: Tero Kristo Current implementation will disable clocks in the order defined in clock34xx.h, at least DPLL4_M2X2 will hang in certain cases (and prevent retention / off) if clocks are not disabled in correct order. This patch makes sure the parent clocks will be active when disabling a clock. linux-omap source commit is 672680063420ef8c8c4e7271984bb9cc08171d29. Signed-off-by: Tero Kristo Signed-off-by: Kevin Hilman --- arch/arm/mach-omap2/clock.c | 6 +++++- 1 files changed, 5 insertions(+), 1 deletions(-) diff --git a/arch/arm/mach-omap2/clock.c b/arch/arm/mach-omap2/clock.c index 9c62ada..d4d2e7b 100644 --- a/arch/arm/mach-omap2/clock.c +++ b/arch/arm/mach-omap2/clock.c @@ -1078,6 +1078,10 @@ void omap2_clk_disable_unused(struct clk *clk) return; printk(KERN_INFO "Disabling unused clock \"%s\"\n", clk->name); - _omap2_clk_disable(clk); + if (cpu_is_omap34xx()) { + omap2_clk_enable(clk); + omap2_clk_disable(clk); + } else + _omap2_clk_disable(clk); } #endif