From patchwork Tue Aug 30 07:46:02 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Richard Zhu X-Patchwork-Id: 12958888 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 39C65C0502A for ; Tue, 30 Aug 2022 08:04:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231431AbiH3IEE (ORCPT ); Tue, 30 Aug 2022 04:04:04 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46576 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231415AbiH3IDz (ORCPT ); Tue, 30 Aug 2022 04:03:55 -0400 Received: from inva021.nxp.com (inva021.nxp.com [92.121.34.21]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 68D47D2E86; Tue, 30 Aug 2022 01:03:52 -0700 (PDT) Received: from inva021.nxp.com (localhost [127.0.0.1]) by inva021.eu-rdc02.nxp.com (Postfix) with ESMTP id C3A03203E3B; Tue, 30 Aug 2022 10:03:50 +0200 (CEST) Received: from aprdc01srsp001v.ap-rdc01.nxp.com (aprdc01srsp001v.ap-rdc01.nxp.com [165.114.16.16]) by inva021.eu-rdc02.nxp.com (Postfix) with ESMTP id 8BB1F203DB6; Tue, 30 Aug 2022 10:03:50 +0200 (CEST) Received: from localhost.localdomain (shlinux2.ap.freescale.net [10.192.224.44]) by aprdc01srsp001v.ap-rdc01.nxp.com (Postfix) with ESMTP id 5046F180031E; Tue, 30 Aug 2022 16:03:48 +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, richard.leitner@linux.dev 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 Subject: [PATCH v5 5/7] soc: imx: imx8mp-blk-ctrl: handle PCIe PHY resets Date: Tue, 30 Aug 2022 15:46:02 +0800 Message-Id: <1661845564-11373-6-git-send-email-hongxing.zhu@nxp.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1661845564-11373-1-git-send-email-hongxing.zhu@nxp.com> References: <1661845564-11373-1-git-send-email-hongxing.zhu@nxp.com> X-Virus-Scanned: ClamAV using ClamSMTP Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org From: Lucas Stach Dessert the PHY reset when powering up the domain and put it back into reset when the domain is powered down. Signed-off-by: Lucas Stach --- drivers/soc/imx/imx8mp-blk-ctrl.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/drivers/soc/imx/imx8mp-blk-ctrl.c b/drivers/soc/imx/imx8mp-blk-ctrl.c index 4ca2ede6871b..6c939d68ba9a 100644 --- a/drivers/soc/imx/imx8mp-blk-ctrl.c +++ b/drivers/soc/imx/imx8mp-blk-ctrl.c @@ -18,6 +18,8 @@ #define GPR_REG0 0x0 #define PCIE_CLOCK_MODULE_EN BIT(0) #define USB_CLOCK_MODULE_EN BIT(1) +#define PCIE_PHY_APB_RST BIT(4) +#define PCIE_PHY_INIT_RST BIT(5) struct imx8mp_blk_ctrl_domain; @@ -75,6 +77,10 @@ static void imx8mp_hsio_blk_ctrl_power_on(struct imx8mp_blk_ctrl *bc, case IMX8MP_HSIOBLK_PD_PCIE: regmap_set_bits(bc->regmap, GPR_REG0, PCIE_CLOCK_MODULE_EN); break; + case IMX8MP_HSIOBLK_PD_PCIE_PHY: + regmap_set_bits(bc->regmap, GPR_REG0, + PCIE_PHY_APB_RST | PCIE_PHY_INIT_RST); + break; default: break; } @@ -90,6 +96,10 @@ static void imx8mp_hsio_blk_ctrl_power_off(struct imx8mp_blk_ctrl *bc, case IMX8MP_HSIOBLK_PD_PCIE: regmap_clear_bits(bc->regmap, GPR_REG0, PCIE_CLOCK_MODULE_EN); break; + case IMX8MP_HSIOBLK_PD_PCIE_PHY: + regmap_clear_bits(bc->regmap, GPR_REG0, + PCIE_PHY_APB_RST | PCIE_PHY_INIT_RST); + break; default: break; }