Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932826AbbFCMTP (ORCPT ); Wed, 3 Jun 2015 08:19:15 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:57882 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932664AbbFCMRr (ORCPT ); Wed, 3 Jun 2015 08:17:47 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Javier Martinez Canillas , Kevin Hilman , Abhilash Kesavan , Tomasz Figa , Sylwester Nawrocki Subject: [PATCH 4.0 043/148] clk: exynos5420: Restore GATE_BUS_TOP on suspend Date: Wed, 3 Jun 2015 21:08:33 +0900 Message-Id: <20150603114207.233512703@linuxfoundation.org> X-Mailer: git-send-email 2.4.2 In-Reply-To: <20150603114205.337615117@linuxfoundation.org> References: <20150603114205.337615117@linuxfoundation.org> User-Agent: quilt/0.64 MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-15 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2074 Lines: 49 4.0-stable review patch. If anyone has any objections, please let me know. ------------------ From: Javier Martinez Canillas commit 97372e5a99449b4fffa824a382ad6358066a9918 upstream. Commit ae43b3289186 ("ARM: 8202/1: dmaengine: pl330: Add runtime Power Management support v12") added pm support for the pl330 dma driver but it makes the clock for the Exynos5420 MDMA0 DMA controller to be gated during suspend and this in turn makes its parent clock aclk266_g2d to be gated. But the clock needs to be ungated prior suspend to allow the system to be suspend and resumed correctly. Add GATE_BUS_TOP register to the list of registers to be restored when the system enters into a suspend state so aclk266_g2d will be ungated. Thanks to Abhilash Kesavan for figuring out that this was the issue. Fixes: ae43b32 ("ARM: 8202/1: dmaengine: pl330: Add runtime Power Management support v12") Signed-off-by: Javier Martinez Canillas Tested-by: Kevin Hilman Tested-by: Abhilash Kesavan Acked-by: Tomasz Figa Signed-off-by: Sylwester Nawrocki Signed-off-by: Greg Kroah-Hartman --- drivers/clk/samsung/clk-exynos5420.c | 1 + 1 file changed, 1 insertion(+) --- a/drivers/clk/samsung/clk-exynos5420.c +++ b/drivers/clk/samsung/clk-exynos5420.c @@ -271,6 +271,7 @@ static const struct samsung_clk_reg_dump { .offset = SRC_MASK_PERIC0, .value = 0x11111110, }, { .offset = SRC_MASK_PERIC1, .value = 0x11111100, }, { .offset = SRC_MASK_ISP, .value = 0x11111000, }, + { .offset = GATE_BUS_TOP, .value = 0xffffffff, }, { .offset = GATE_BUS_DISP1, .value = 0xffffffff, }, { .offset = GATE_IP_PERIC, .value = 0xffffffff, }, }; -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/