From patchwork Wed Apr 8 05:34:12 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Javier Martinez Canillas X-Patchwork-Id: 6177381 Return-Path: X-Original-To: patchwork-linux-samsung-soc@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 8E5C59F1C4 for ; Wed, 8 Apr 2015 05:34:27 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id AF30E202FE for ; Wed, 8 Apr 2015 05:34:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 94CE7202EC for ; Wed, 8 Apr 2015 05:34:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751115AbbDHFeY (ORCPT ); Wed, 8 Apr 2015 01:34:24 -0400 Received: from bhuna.collabora.co.uk ([93.93.135.160]:54685 "EHLO bhuna.collabora.co.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751037AbbDHFeY (ORCPT ); Wed, 8 Apr 2015 01:34:24 -0400 Received: from [127.0.0.1] (localhost [127.0.0.1]) (Authenticated sender: javier) with ESMTPSA id A4D6E60062B From: Javier Martinez Canillas To: Stephen Boyd Cc: Mike Turquette , Sylwester Nawrocki , Tomasz Figa , Kukjin Kim , Olof Johansson , Doug Anderson , Krzysztof Kozlowski , Kevin Hilman , Tyler Baker , Abhilash Kesavan , Chanwoo Choi , linux-clk@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org, Javier Martinez Canillas Subject: [PATCH 1/1] clk: exynos5420: Restore GATE_BUS_TOP on suspend Date: Wed, 8 Apr 2015 07:34:12 +0200 Message-Id: <1428471252-15872-1-git-send-email-javier.martinez@collabora.co.uk> X-Mailer: git-send-email 2.1.4 Sender: linux-samsung-soc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP 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 Acked-by: Sylwester Nawrocki --- drivers/clk/samsung/clk-exynos5420.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/clk/samsung/clk-exynos5420.c b/drivers/clk/samsung/clk-exynos5420.c index 07d666cc6a29..bea4a173eef5 100644 --- 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 exynos5420_set_clksrc[] = { { .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, }, };