From patchwork Sat May 8 20:56:57 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lucas Stach X-Patchwork-Id: 432742 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A89D7C433B4 for ; Sat, 8 May 2021 21:06:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 85A81610CD for ; Sat, 8 May 2021 21:06:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229522AbhEHVHl (ORCPT ); Sat, 8 May 2021 17:07:41 -0400 Received: from ns.lynxeye.de ([87.118.118.114]:40619 "EHLO lynxeye.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S229559AbhEHVHk (ORCPT ); Sat, 8 May 2021 17:07:40 -0400 Received: by lynxeye.de (Postfix, from userid 501) id 0DA46E7425C; Sat, 8 May 2021 22:57:03 +0200 (CEST) Received: from astat.fritz.box (a89-183-71-68.net-htp.de [89.183.71.68]) by lynxeye.de (Postfix) with ESMTPA id B0865E74214; Sat, 8 May 2021 22:57:02 +0200 (CEST) From: Lucas Stach To: Rob Herring , Ulf Hansson , Adrian Hunter Cc: Pengutronix Kernel Team , Fabio Estevam , linux-mmc@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH 1/2] dt-bindings: mmc: add no-mmc-hs400 flag Date: Sat, 8 May 2021 22:56:57 +0200 Message-Id: <20210508205658.91105-1-dev@lynxeye.de> X-Mailer: git-send-email 2.31.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org HS400 requires a data strobe line in addition to the other MMC signal lines, so if a board design neglects to wire up this signal, HS400 mode is no available, even if both the controller and the eMMC are claiming to support this mode. Add a DT flag to allow boards to disable the HS400 support in this case. Signed-off-by: Lucas Stach Acked-by: Rob Herring --- Documentation/devicetree/bindings/mmc/mmc-controller.yaml | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/Documentation/devicetree/bindings/mmc/mmc-controller.yaml b/Documentation/devicetree/bindings/mmc/mmc-controller.yaml index e141330c1114..ac80d09df3a9 100644 --- a/Documentation/devicetree/bindings/mmc/mmc-controller.yaml +++ b/Documentation/devicetree/bindings/mmc/mmc-controller.yaml @@ -220,6 +220,11 @@ properties: description: eMMC HS400 enhanced strobe mode is supported + no-mmc-hs400: + $ref: /schemas/types.yaml#/definitions/flag + description: + All eMMC HS400 modes are not supported. + dsr: description: Value the card Driver Stage Register (DSR) should be programmed From patchwork Sat May 8 20:56:58 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lucas Stach X-Patchwork-Id: 432928 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9830AC433B4 for ; Sat, 8 May 2021 21:06:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7C3E86101B for ; Sat, 8 May 2021 21:06:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229656AbhEHVHl (ORCPT ); Sat, 8 May 2021 17:07:41 -0400 Received: from ns.lynxeye.de ([87.118.118.114]:40618 "EHLO lynxeye.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S229522AbhEHVHk (ORCPT ); Sat, 8 May 2021 17:07:40 -0400 X-Greylist: delayed 543 seconds by postgrey-1.27 at vger.kernel.org; Sat, 08 May 2021 17:07:40 EDT Received: by lynxeye.de (Postfix, from userid 501) id 78D66E74251; Sat, 8 May 2021 22:57:04 +0200 (CEST) Received: from astat.fritz.box (a89-183-71-68.net-htp.de [89.183.71.68]) by lynxeye.de (Postfix) with ESMTPA id 0727CE7424E; Sat, 8 May 2021 22:57:03 +0200 (CEST) From: Lucas Stach To: Rob Herring , Ulf Hansson , Adrian Hunter Cc: Pengutronix Kernel Team , Fabio Estevam , linux-mmc@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH 2/2] mmc: sdhci-esdhc-imx: add support for disabling HS400 mode via DT Date: Sat, 8 May 2021 22:56:58 +0200 Message-Id: <20210508205658.91105-2-dev@lynxeye.de> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210508205658.91105-1-dev@lynxeye.de> References: <20210508205658.91105-1-dev@lynxeye.de> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org On some boards the data strobe line isn't wired up, rendering HS400 support broken, even if both the controller and the eMMC claim to support it. Allow to disable HS400 mode via DT. Signed-off-by: Lucas Stach --- drivers/mmc/host/sdhci-esdhc-imx.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c index a20459744d21..1d6068507fb6 100644 --- a/drivers/mmc/host/sdhci-esdhc-imx.c +++ b/drivers/mmc/host/sdhci-esdhc-imx.c @@ -1483,6 +1483,9 @@ sdhci_esdhc_imx_probe_dt(struct platform_device *pdev, if (of_find_property(np, "no-1-8-v", NULL)) host->quirks2 |= SDHCI_QUIRK2_NO_1_8_V; + if (of_find_property(np, "no-mmc-hs400", NULL)) + host->quirks2 &= ~SDHCI_QUIRK2_CAPS_BIT63_FOR_HS400; + if (of_property_read_u32(np, "fsl,delay-line", &boarddata->delay_line)) boarddata->delay_line = 0;