From patchwork Fri Nov 26 13:57:14 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Marek_Beh=C3=BAn?= X-Patchwork-Id: 1560156 X-Patchwork-Delegate: sr@denx.de Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: bilbo.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20201202 header.b=WLEcC8XE; dkim-atps=neutral Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=lists.denx.de (client-ip=85.214.62.61; helo=phobos.denx.de; envelope-from=u-boot-bounces@lists.denx.de; receiver=) Received: from phobos.denx.de (phobos.denx.de [85.214.62.61]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (No client certificate requested) by bilbo.ozlabs.org (Postfix) with ESMTPS id 4J0xFH4s6Xz9t1Q for ; Sat, 27 Nov 2021 00:59:31 +1100 (AEDT) Received: from h2850616.stratoserver.net (localhost [IPv6:::1]) by phobos.denx.de (Postfix) with ESMTP id 2F43083760; Fri, 26 Nov 2021 14:58:48 +0100 (CET) Authentication-Results: phobos.denx.de; dmarc=pass (p=none dis=none) header.from=kernel.org Authentication-Results: phobos.denx.de; spf=pass smtp.mailfrom=u-boot-bounces@lists.denx.de Authentication-Results: phobos.denx.de; dkim=pass (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.b="WLEcC8XE"; dkim-atps=neutral Received: by phobos.denx.de (Postfix, from userid 109) id 37DD083747; Fri, 26 Nov 2021 14:58:04 +0100 (CET) X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on phobos.denx.de X-Spam-Level: X-Spam-Status: No, score=-2.8 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,SPF_HELO_NONE, SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.2 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by phobos.denx.de (Postfix) with ESMTPS id 9B5C88327C for ; Fri, 26 Nov 2021 14:57:44 +0100 (CET) Authentication-Results: phobos.denx.de; dmarc=pass (p=none dis=none) header.from=kernel.org Authentication-Results: phobos.denx.de; spf=pass smtp.mailfrom=kabel@kernel.org 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 ams.source.kernel.org (Postfix) with ESMTPS id 4C7BCB827EA; Fri, 26 Nov 2021 13:57:44 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id DD6DCC9305D; Fri, 26 Nov 2021 13:57:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1637935063; bh=DC9WTVBkkegMI9jLG2iDQpm6q0V73TgbG84WtVAYq8Y=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=WLEcC8XEfxR1XrqXi5/qPRUyZeXJPeNMoWmvWpzZYYmnG9005p4Qg2mwcHHO0mGBU YqL2XR2+zm6/yYvlhfGZCKRuhprsquC6faGvSR+sfE2fTCJth0/jTa6a8cXochZC77 FACWyrqc1rEBa2eQmq1egDTCC4NDeM3ZOXmvwugWwevFqAMsV4lkmK9BWWaySWn3lT dwbZPTyCmv4Ufi+8fWcY8yowVOXNcdzDcTlwBvGonjUbccXj9MwrbEqBkX9nFwXAW6 NgDal9F6HnmZJZSi0e/K9F8Ll6GbfZDGIAqKEuff/xaJdOKBandnOc8S6qQ0bEy4qQ f3NwG4Pt3hz5Q== From: =?utf-8?q?Marek_Beh=C3=BAn?= To: Stefan Roese Cc: u-boot@lists.denx.de, =?utf-8?q?Pali_Roh=C3=A1r?= , =?utf-8?q?Marek_Beh=C3=BAn?= Subject: [PATCH u-boot-marvell RESEND 10/11] arm: mvebu: turris_mox: Fix unstable board topology reading Date: Fri, 26 Nov 2021 14:57:14 +0100 Message-Id: <20211126135715.26485-11-kabel@kernel.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20211126135715.26485-1-kabel@kernel.org> References: <20211126135715.26485-1-kabel@kernel.org> MIME-Version: 1.0 X-BeenThere: u-boot@lists.denx.de X-Mailman-Version: 2.1.37 Precedence: list List-Id: U-Boot discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: u-boot-bounces@lists.denx.de Sender: "U-Boot" X-Virus-Scanned: clamav-milter 0.103.2 at phobos.denx.de X-Virus-Status: Clean From: Marek Behún The pre-relocation board topology reading in board_fix_fdt() is unstable: sometimes wrong data are read from the SPI bus. This is due to wrong order of SPI bus configuration instructions: we first need to set the pins to SPI mode, and only after that configure the bus. Also add a 1ms delay before enabling chip-select, so that the clock pin is high for some time before reading the bus. Signed-off-by: Marek Behún Reviewed-by: Stefan Roese --- board/CZ.NIC/turris_mox/turris_mox.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/board/CZ.NIC/turris_mox/turris_mox.c b/board/CZ.NIC/turris_mox/turris_mox.c index 06616257d7..fab41c04b5 100644 --- a/board/CZ.NIC/turris_mox/turris_mox.c +++ b/board/CZ.NIC/turris_mox/turris_mox.c @@ -56,9 +56,11 @@ int board_fix_fdt(void *blob) * to read SPI by reading/writing SPI registers directly */ - writel(0x10df, ARMADA_37XX_SPI_CFG); /* put pin from GPIO to SPI mode */ clrbits_le32(ARMADA_37XX_NB_GPIO_SEL, BIT(12)); + /* configure cpol, cpha, prescale */ + writel(0x10df, ARMADA_37XX_SPI_CFG); + mdelay(1); /* enable SPI CS1 */ setbits_le32(ARMADA_37XX_SPI_CTRL, BIT(17));