From patchwork Thu Aug 18 07:02:28 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hongxing Zhu X-Patchwork-Id: 12946822 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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id E3EF0C00140 for ; Thu, 18 Aug 2022 07:20:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:List-Subscribe:List-Help: List-Post:List-Archive:List-Unsubscribe:List-Id:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=qI0mWot0MLYOaq4A/X70VratFm2vOJ0TgHJtYjpHa/g=; b=VvQNPTjJxDi3Wf sjli/zyHCc7lv9M+4BStlwaXSSx2EJ6o2u7CeKnp5tgjbgbrLRzOlYv9QZ094It85L/4RCvK55HLi FTdkWlJjKNSE7cY6sFmd821R/yztVtxRRRf4KIk8WcFbzJ+EuZW8eLMQAySDw7ZW8+27uKFT1XtOR zoxAs34ISBFHrPCC+lG79rfibDqNQbb+PSo095XOpPc1LQozALKxSYSETwwPpDfSw0XPouC/PLOyL i62icvjzLnVg1H5kKfLFTqSkampduTIP438tO1XFu2JUg1S5i5B505hhEH3FjfVWkjO/+LMiFQLv0 7MHmeaFjIpdAVpf82wIw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1oOZpP-00HabL-AS; Thu, 18 Aug 2022 07:20:31 +0000 Received: from inva020.nxp.com ([92.121.34.13]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1oOZod-00HZpu-8h; Thu, 18 Aug 2022 07:19:44 +0000 Received: from inva020.nxp.com (localhost [127.0.0.1]) by inva020.eu-rdc02.nxp.com (Postfix) with ESMTP id 577EC1A0675; Thu, 18 Aug 2022 09:19:37 +0200 (CEST) Received: from aprdc01srsp001v.ap-rdc01.nxp.com (aprdc01srsp001v.ap-rdc01.nxp.com [165.114.16.16]) by inva020.eu-rdc02.nxp.com (Postfix) with ESMTP id 21A3A1A0673; Thu, 18 Aug 2022 09:19:37 +0200 (CEST) Received: from localhost.localdomain (shlinux2.ap.freescale.net [10.192.224.44]) by aprdc01srsp001v.ap-rdc01.nxp.com (Postfix) with ESMTP id 3AE001820F59; Thu, 18 Aug 2022 15:19:35 +0800 (+08) From: Richard Zhu To: p.zabel@pengutronix.de, l.stach@pengutronix.de, bhelgaas@google.com, lorenzo.pieralisi@arm.com, robh@kernel.org, shawnguo@kernel.org, vkoul@kernel.org, alexander.stein@ew.tq-group.com, marex@denx.de Cc: linux-phy@lists.infradead.org, devicetree@vger.kernel.org, linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, kernel@pengutronix.de, linux-imx@nxp.com, Richard Zhu Subject: [PATCH v3 1/6] reset: imx7: Add the iMX8MP PCIe PHY PERST support Date: Thu, 18 Aug 2022 15:02:28 +0800 Message-Id: <1660806153-29001-2-git-send-email-hongxing.zhu@nxp.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1660806153-29001-1-git-send-email-hongxing.zhu@nxp.com> References: <1660806153-29001-1-git-send-email-hongxing.zhu@nxp.com> X-Virus-Scanned: ClamAV using ClamSMTP X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220818_001943_460622_98C73EA3 X-CRM114-Status: UNSURE ( 7.31 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-phy@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Linux Phy Mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-phy" Errors-To: linux-phy-bounces+linux-phy=archiver.kernel.org@lists.infradead.org On i.MX7/iMX8MM/iMX8MQ, the initialized default value of PERST bit(BIT3) of SRC_PCIEPHY_RCR is 1b'1. But i.MX8MP has one inversed default value 1b'0 of PERST bit. And the PERST bit should be kept 1b'1 after power and clocks are stable. So add the i.MX8MP PCIe PHY PERST support here. Signed-off-by: Richard Zhu Reviewed-by: Philipp Zabel --- drivers/reset/reset-imx7.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/reset/reset-imx7.c b/drivers/reset/reset-imx7.c index 185a333df66c..d2408725eb2c 100644 --- a/drivers/reset/reset-imx7.c +++ b/drivers/reset/reset-imx7.c @@ -329,6 +329,7 @@ static int imx8mp_reset_set(struct reset_controller_dev *rcdev, break; case IMX8MP_RESET_PCIE_CTRL_APPS_EN: + case IMX8MP_RESET_PCIEPHY_PERST: value = assert ? 0 : bit; break; }