From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id EA7D2C433FE for ; Thu, 13 Oct 2022 00:37:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230218AbiJMAhh (ORCPT ); Wed, 12 Oct 2022 20:37:37 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52060 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232042AbiJMAeC (ORCPT ); Wed, 12 Oct 2022 20:34:02 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0639B42D73; Wed, 12 Oct 2022 17:29:02 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id E87B1616EC; Thu, 13 Oct 2022 00:26:18 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id DC241C433D6; Thu, 13 Oct 2022 00:26:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1665620778; bh=sSSiodqJSl4UCZSe25ePy/bpdrUXdRItPgPSfdFrbXI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=hEVYCvWcNoYLWgZW3hDgaK3H3O9+QPUTg5ROuOo1jp/0S/8Jf7wnA3v54zDcA/TdC nmZLukvT4EWbg+dCiWoC7N9UxsIrbqsUo2jCQyPUusk2+IF21wOC57uUQam3Vdp7UK 4+BtrbqRCyt4y2szxqpqRArDCM55JFtXd8CLf/6EPBu8/xzwquVdgtEUzD5dX5pccJ LkR/wIDQhUv3+/IKtrakUjTlZS8kWPhyd1PeO9xmBWuBLPMilq8oqvF+4KUUmFtGEo IfUYWx81yjkItgBfXeQd5Y6IFQSFnTWoZNFwfvCvaPrpS5uG5cxV8TNimliRXHsRts dhRPkHAvNR9iw== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Maxime Ripard , =?UTF-8?q?Noralf=20Tr=C3=B8nnes?= , Stefan Wahren , Stephen Boyd , Sasha Levin , mturquette@baylibre.com, f.fainelli@gmail.com, rjui@broadcom.com, sbranden@broadcom.com, iivanov@suse.de, linux-clk@vger.kernel.org, linux-rpi-kernel@lists.infradead.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH AUTOSEL 5.4 27/27] clk: bcm2835: Make peripheral PLLC critical Date: Wed, 12 Oct 2022 20:24:59 -0400 Message-Id: <20221013002501.1895204-27-sashal@kernel.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20221013002501.1895204-1-sashal@kernel.org> References: <20221013002501.1895204-1-sashal@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Maxime Ripard [ Upstream commit 6c5422851d8be8c7451e968fd2e6da41b6109e17 ] When testing for a series affecting the VEC, it was discovered that turning off and on the VEC clock is crashing the system. It turns out that, when disabling the VEC clock, it's the only child of the PLLC-per clock which will also get disabled. The source of the crash is PLLC-per being disabled. It's likely that some other device might not take a clock reference that it actually needs, but it's unclear which at this point. Let's make PLLC-per critical so that we don't have that crash. Reported-by: Noralf Trønnes Signed-off-by: Maxime Ripard Link: https://lore.kernel.org/r/20220926084509.12233-1-maxime@cerno.tech Reviewed-by: Stefan Wahren Acked-by: Noralf Trønnes Signed-off-by: Stephen Boyd Signed-off-by: Sasha Levin --- drivers/clk/bcm/clk-bcm2835.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/clk/bcm/clk-bcm2835.c b/drivers/clk/bcm/clk-bcm2835.c index e637bd6b295b..5a4d13365399 100644 --- a/drivers/clk/bcm/clk-bcm2835.c +++ b/drivers/clk/bcm/clk-bcm2835.c @@ -1756,7 +1756,7 @@ static const struct bcm2835_clk_desc clk_desc_array[] = { .load_mask = CM_PLLC_LOADPER, .hold_mask = CM_PLLC_HOLDPER, .fixed_divider = 1, - .flags = CLK_SET_RATE_PARENT), + .flags = CLK_IS_CRITICAL | CLK_SET_RATE_PARENT), /* * PLLD is the display PLL, used to drive DSI display panels. -- 2.35.1