From patchwork Thu Oct 3 20:50:30 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stephen Warren X-Patchwork-Id: 11173349 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 3C6F913B1 for ; Thu, 3 Oct 2019 20:50:42 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 1A62D2086A for ; Thu, 3 Oct 2019 20:50:42 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="KzMFhigy" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1A62D2086A Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=wwwdotorg.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-Id:Date:Subject:To :From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=Pbdwb8MBwm+tkPkwcUHVq0W7TAgCjN8cX7nqIPxmLjQ=; b=KzMFhigyYx0uav H5kTvuhp77XS4U77KlZ3Y3+aSN6Vdai0XzgHJ4oQwuwm4sjxggsB6c6opW0LJ/pm+qkO1a1hyl03H zCUMUleTLwwA65gI+MkQiaP/NhQplPJChFAY1e1lWwPHJ3nX3CwZisI5tSnqxhgGQjZY0lKhw8CCD iXpbJr2DFV8GuAJ+C8L7VJn1hrTZ67EMZ3sGcsvd4w3GZmnEYL0WN7HaR6EmRywbOIWsvMM122ND3 lxTEFBJ96YR8fkigq5eK2wI+sYfDj+8xpw6SWabQql8OiWmd6rkUmxHwfHAviOSbmKCHSPgh/fZQb u+7gfllaUY5LmFE0t73A==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.2 #3 (Red Hat Linux)) id 1iG83c-0005x4-JE; Thu, 03 Oct 2019 20:50:40 +0000 Received: from avon.wwwdotorg.org ([104.237.132.123]) by bombadil.infradead.org with esmtps (Exim 4.92.2 #3 (Red Hat Linux)) id 1iG83Z-0005vw-Fd for linux-arm-kernel@lists.infradead.org; Thu, 03 Oct 2019 20:50:38 +0000 Received: from swarren-lx1.nvidia.com (unknown [216.228.112.24]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) by avon.wwwdotorg.org (Postfix) with ESMTPSA id 232B21C0728; Thu, 3 Oct 2019 14:50:36 -0600 (MDT) X-Virus-Status: Clean X-Virus-Scanned: clamav-milter 0.100.3 at avon.wwwdotorg.org From: Stephen Warren To: Thierry Reding , Jonathan Hunter , Peter De Schrijver , Prashant Gaikwad Subject: [PATCH V3 1/4] clk: tegra: mark fuse clock as critical Date: Thu, 3 Oct 2019 14:50:30 -0600 Message-Id: <20191003205033.98381-1-swarren@wwwdotorg.org> X-Mailer: git-send-email 2.23.0 MIME-Version: 1.0 X-NVConfidentiality: public X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191003_135037_564314_87762A3C X-CRM114-Status: GOOD ( 10.39 ) X-Spam-Score: 0.0 (/) X-Spam-Report: SpamAssassin version 3.4.2 on bombadil.infradead.org summary: Content analysis details: (0.0 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Stephen Boyd , linux-tegra@vger.kernel.org, Michael Turquette , linux-clk@vger.kernel.org, linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org From: Stephen Warren For a little over a year, U-Boot on Tegra124 has configured the flow controller to perform automatic RAM re-repair on off->on power transitions of the CPU rail1]. This is mandatory for correct operation of Tegra124. However, RAM re-repair relies on certain clocks, which the kernel must enable and leave running. The fuse clock is one of those clocks. Mark this clock as critical so that LP1 power mode (system suspend) operates correctly. [1] 3cc7942a4ae5 ARM: tegra: implement RAM repair Reported-by: Jonathan Hunter Cc: stable@vger.kernel.org Signed-off-by: Stephen Warren --- v3: Added comment to the clock table entry indicating why the clock is critical. v2: Set CRITICAL flag on the clock, rather than enabling it in tegra124_init_table[]. --- drivers/clk/tegra/clk-tegra-periph.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/clk/tegra/clk-tegra-periph.c b/drivers/clk/tegra/clk-tegra-periph.c index 1ed85f120a1b..49b9f2f85bad 100644 --- a/drivers/clk/tegra/clk-tegra-periph.c +++ b/drivers/clk/tegra/clk-tegra-periph.c @@ -785,7 +785,11 @@ static struct tegra_periph_init_data gate_clks[] = { GATE("ahbdma", "hclk", 33, 0, tegra_clk_ahbdma, 0), GATE("apbdma", "pclk", 34, 0, tegra_clk_apbdma, 0), GATE("kbc", "clk_32k", 36, TEGRA_PERIPH_ON_APB | TEGRA_PERIPH_NO_RESET, tegra_clk_kbc, 0), - GATE("fuse", "clk_m", 39, TEGRA_PERIPH_ON_APB, tegra_clk_fuse, 0), + /* + * Critical for RAM re-repair operation, which must occur on resume + * from LP1 system suspend and as part of CCPLEX cluster switching. + */ + GATE("fuse", "clk_m", 39, TEGRA_PERIPH_ON_APB, tegra_clk_fuse, CLK_IS_CRITICAL), GATE("fuse_burn", "clk_m", 39, TEGRA_PERIPH_ON_APB, tegra_clk_fuse_burn, 0), GATE("kfuse", "clk_m", 40, TEGRA_PERIPH_ON_APB, tegra_clk_kfuse, 0), GATE("apbif", "clk_m", 107, TEGRA_PERIPH_ON_APB, tegra_clk_apbif, 0),