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[2620:137:e000::1:20]) by mx.google.com with ESMTP id m6-20020a056402510600b00447c220a3desi8215004edd.167.2022.08.29.08.38.02; Mon, 29 Aug 2022 08:38:29 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229705AbiH2PQq (ORCPT + 99 others); Mon, 29 Aug 2022 11:16:46 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39176 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229680AbiH2PQo (ORCPT ); Mon, 29 Aug 2022 11:16:44 -0400 Received: from metis.ext.pengutronix.de (metis.ext.pengutronix.de [IPv6:2001:67c:670:201:290:27ff:fe1d:cc33]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 51C247A50E for ; Mon, 29 Aug 2022 08:16:43 -0700 (PDT) Received: from dude02.red.stw.pengutronix.de ([2a0a:edc0:0:1101:1d::28]) by metis.ext.pengutronix.de with esmtp (Exim 4.92) (envelope-from ) id 1oSgUz-0006bl-1e; Mon, 29 Aug 2022 17:16:25 +0200 From: Lucas Stach To: Richard Zhu Cc: p.zabel@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, 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 1/2] soc: imx: imx8mp-blk-ctrl: handle PCIe PHY resets Date: Mon, 29 Aug 2022 17:16:22 +0200 Message-Id: <20220829151623.808344-1-l.stach@pengutronix.de> X-Mailer: git-send-email 2.30.2 In-Reply-To: <1661760917-9558-1-git-send-email-hongxing.zhu@nxp.com> References: <1661760917-9558-1-git-send-email-hongxing.zhu@nxp.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SA-Exim-Connect-IP: 2a0a:edc0:0:1101:1d::28 X-SA-Exim-Mail-From: l.stach@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-kernel@vger.kernel.org X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00,RCVD_IN_DNSWL_MED, SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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; } -- 2.30.2