From patchwork Sat Jan 16 18:04:21 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marek Vasut X-Patchwork-Id: 365345 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 65CABC433DB for ; Sat, 16 Jan 2021 18:05:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3264A22510 for ; Sat, 16 Jan 2021 18:05:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727251AbhAPSFn (ORCPT ); Sat, 16 Jan 2021 13:05:43 -0500 Received: from mail-out.m-online.net ([212.18.0.9]:60892 "EHLO mail-out.m-online.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725964AbhAPSFn (ORCPT ); Sat, 16 Jan 2021 13:05:43 -0500 Received: from frontend01.mail.m-online.net (unknown [192.168.8.182]) by mail-out.m-online.net (Postfix) with ESMTP id 4DJ5Y02NHvz1qs3P; Sat, 16 Jan 2021 19:04:36 +0100 (CET) Received: from localhost (dynscan1.mnet-online.de [192.168.6.70]) by mail.m-online.net (Postfix) with ESMTP id 4DJ5Y01XH7z1qqkn; Sat, 16 Jan 2021 19:04:36 +0100 (CET) X-Virus-Scanned: amavisd-new at mnet-online.de Received: from mail.mnet-online.de ([192.168.8.182]) by localhost (dynscan1.mail.m-online.net [192.168.6.70]) (amavisd-new, port 10024) with ESMTP id LKD8K6MrV008; Sat, 16 Jan 2021 19:04:34 +0100 (CET) X-Auth-Info: phBnIXuFT8YPJ4snd2G2PTyqNWn7WKdVWsH6wtiYXrw= Received: from tr.lan (ip-89-176-112-137.net.upcbroadband.cz [89.176.112.137]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.mnet-online.de (Postfix) with ESMTPSA; Sat, 16 Jan 2021 19:04:34 +0100 (CET) From: Marek Vasut To: linux-mmc@vger.kernel.org Cc: Marek Vasut , Alexandre Torgue , Linus Walleij , Ludovic Barre , Rob Herring , Ulf Hansson , linux-stm32@st-md-mailman.stormreply.com, devicetree@vger.kernel.org Subject: [PATCH 1/4] mmc: mmci: Add bindings to operate CMD, CK, CKIN pins as GPIO Date: Sat, 16 Jan 2021 19:04:21 +0100 Message-Id: <20210116180424.57331-1-marex@denx.de> X-Mailer: git-send-email 2.29.2 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org Add DT bindings to describe GPIO line associated with CMD, CK, CKIN pins. Signed-off-by: Marek Vasut Cc: Alexandre Torgue Cc: Linus Walleij Cc: Ludovic Barre Cc: Rob Herring Cc: Ulf Hansson Cc: linux-stm32@st-md-mailman.stormreply.com Cc: devicetree@vger.kernel.org --- NOTE: Depends on mmc: mmci: Convert bindings to DT schema --- .../devicetree/bindings/mmc/arm,pl18x.yaml | 20 +++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/Documentation/devicetree/bindings/mmc/arm,pl18x.yaml b/Documentation/devicetree/bindings/mmc/arm,pl18x.yaml index 0129d622fb67..0908dbeaa472 100644 --- a/Documentation/devicetree/bindings/mmc/arm,pl18x.yaml +++ b/Documentation/devicetree/bindings/mmc/arm,pl18x.yaml @@ -132,6 +132,26 @@ properties: driver to sample the receive data (for example with a voltage switch transceiver). + st,cmd-gpios: + maxItems: 1 + description: + The GPIO matching the CMD pin. + + st,ck-gpios: + maxItems: 1 + description: + The GPIO matching the CK pin. + + st,ckin-gpios: + maxItems: 1 + description: + The GPIO matching the CKIN pin. + +dependencies: + st,cmd-gpios: [ "st,use-ckin" ] + st,ck-gpios: [ "st,use-ckin" ] + st,ckin-gpios: [ "st,use-ckin" ] + additionalProperties: true required: From patchwork Sat Jan 16 18:04:22 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marek Vasut X-Patchwork-Id: 365346 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=ham 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 7B4FBC433E0 for ; Sat, 16 Jan 2021 18:05:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4A5C322472 for ; Sat, 16 Jan 2021 18:05:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727236AbhAPSFU (ORCPT ); Sat, 16 Jan 2021 13:05:20 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50894 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726018AbhAPSFU (ORCPT ); Sat, 16 Jan 2021 13:05:20 -0500 Received: from mail-out.m-online.net (mail-out.m-online.net [IPv6:2001:a60:0:28:0:1:25:1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DD082C061573 for ; Sat, 16 Jan 2021 10:04:39 -0800 (PST) Received: from frontend01.mail.m-online.net (unknown [192.168.8.182]) by mail-out.m-online.net (Postfix) with ESMTP id 4DJ5Y169vmz1rtNH; Sat, 16 Jan 2021 19:04:37 +0100 (CET) Received: from localhost (dynscan1.mnet-online.de [192.168.6.70]) by mail.m-online.net (Postfix) with ESMTP id 4DJ5Y15GKpz1qqkn; Sat, 16 Jan 2021 19:04:37 +0100 (CET) X-Virus-Scanned: amavisd-new at mnet-online.de Received: from mail.mnet-online.de ([192.168.8.182]) by localhost (dynscan1.mail.m-online.net [192.168.6.70]) (amavisd-new, port 10024) with ESMTP id ldnm-OCcw--l; Sat, 16 Jan 2021 19:04:36 +0100 (CET) X-Auth-Info: VR0zfD/alvq/vPOGbnFud8iu7zS5eGMnF4COn1wZDdE= Received: from tr.lan (ip-89-176-112-137.net.upcbroadband.cz [89.176.112.137]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.mnet-online.de (Postfix) with ESMTPSA; Sat, 16 Jan 2021 19:04:36 +0100 (CET) From: Marek Vasut To: linux-mmc@vger.kernel.org Cc: Marek Vasut , Alexandre Torgue , Linus Walleij , Ludovic Barre , Ulf Hansson , linux-stm32@st-md-mailman.stormreply.com Subject: [PATCH 2/4] mmc: mmci: Add support for probing bus voltage level translator Date: Sat, 16 Jan 2021 19:04:22 +0100 Message-Id: <20210116180424.57331-2-marex@denx.de> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210116180424.57331-1-marex@denx.de> References: <20210116180424.57331-1-marex@denx.de> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org Add support for testing whether bus voltage level translator is present and operational. This is useful on systems where the bus voltage level translator is optional, as the translator can be auto-detected by the driver and the feedback clock functionality can be disabled if it is not present. This requires additional pinmux state, "init", where the CMD, CK, CKIN lines are not configured, so they can be claimed as GPIOs early on in probe(). The translator test sets CMD high to avoid interfering with a card, and then verifies whether signal set on CK is detected on CKIN. If the signal is detected, translator is present, otherwise the CKIN feedback clock are disabled. Signed-off-by: Marek Vasut Cc: Alexandre Torgue Cc: Linus Walleij Cc: Ludovic Barre Cc: Ulf Hansson Cc: linux-stm32@st-md-mailman.stormreply.com Reviewed-by: Linus Walleij Tested-by: Yann Gautier --- drivers/mmc/host/mmci.c | 70 ++++++++++++++++++++++++++++++++++++++--- 1 file changed, 65 insertions(+), 5 deletions(-) diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c index b5a41a7ce165..1bc674577ff9 100644 --- a/drivers/mmc/host/mmci.c +++ b/drivers/mmc/host/mmci.c @@ -36,6 +36,7 @@ #include #include #include +#include #include #include @@ -1888,6 +1889,65 @@ static struct mmc_host_ops mmci_ops = { .start_signal_voltage_switch = mmci_sig_volt_switch, }; +static void mmci_probe_level_translator(struct mmc_host *mmc) +{ + struct device *dev = mmc_dev(mmc); + struct mmci_host *host = mmc_priv(mmc); + struct gpio_desc *cmd_gpio; + struct gpio_desc *ck_gpio; + struct gpio_desc *ckin_gpio; + int clk_hi, clk_lo; + + /* + * Assume the level translator is present if st,use-ckin is set. + * This is to cater for DTs which do not implement this test. + */ + host->clk_reg_add |= MCI_STM32_CLK_SELCKIN; + + cmd_gpio = gpiod_get(dev, "st,cmd", GPIOD_OUT_HIGH); + if (IS_ERR(cmd_gpio)) + goto exit_cmd; + + ck_gpio = gpiod_get(dev, "st,ck", GPIOD_OUT_HIGH); + if (IS_ERR(ck_gpio)) + goto exit_ck; + + ckin_gpio = gpiod_get(dev, "st,ckin", GPIOD_IN); + if (IS_ERR(ckin_gpio)) + goto exit_ckin; + + /* All GPIOs are valid, test whether level translator works */ + + /* Sample CKIN */ + clk_hi = !!gpiod_get_value(ckin_gpio); + + /* Set CK low */ + gpiod_set_value(ck_gpio, 0); + + /* Sample CKIN */ + clk_lo = !!gpiod_get_value(ckin_gpio); + + /* Tristate all */ + gpiod_direction_input(cmd_gpio); + gpiod_direction_input(ck_gpio); + + /* Level translator is present if CK signal is propagated to CKIN */ + if (!clk_hi || clk_lo) { + host->clk_reg_add &= ~MCI_STM32_CLK_SELCKIN; + dev_warn(dev, + "Level translator inoperable, CK signal not detected on CKIN, disabling.\n"); + } + + gpiod_put(ckin_gpio); + +exit_ckin: + gpiod_put(ck_gpio); +exit_ck: + gpiod_put(cmd_gpio); +exit_cmd: + pinctrl_select_default_state(dev); +} + static int mmci_of_parse(struct device_node *np, struct mmc_host *mmc) { struct mmci_host *host = mmc_priv(mmc); @@ -1913,7 +1973,7 @@ static int mmci_of_parse(struct device_node *np, struct mmc_host *mmc) if (of_get_property(np, "st,neg-edge", NULL)) host->clk_reg_add |= MCI_STM32_CLK_NEGEDGE; if (of_get_property(np, "st,use-ckin", NULL)) - host->clk_reg_add |= MCI_STM32_CLK_SELCKIN; + mmci_probe_level_translator(mmc); if (of_get_property(np, "mmc-cap-mmc-highspeed", NULL)) mmc->caps |= MMC_CAP_MMC_HIGHSPEED; @@ -1949,15 +2009,15 @@ static int mmci_probe(struct amba_device *dev, if (!mmc) return -ENOMEM; - ret = mmci_of_parse(np, mmc); - if (ret) - goto host_free; - host = mmc_priv(mmc); host->mmc = mmc; host->mmc_ops = &mmci_ops; mmc->ops = &mmci_ops; + ret = mmci_of_parse(np, mmc); + if (ret) + goto host_free; + /* * Some variant (STM32) doesn't have opendrain bit, nevertheless * pins can be set accordingly using pinctrl From patchwork Sat Jan 16 18:04:23 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marek Vasut X-Patchwork-Id: 364916 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=ham 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 BB3EDC433E0 for ; Sat, 16 Jan 2021 18:05:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8A5FB224B2 for ; Sat, 16 Jan 2021 18:05:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726018AbhAPSFg (ORCPT ); Sat, 16 Jan 2021 13:05:36 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50896 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725964AbhAPSFf (ORCPT ); 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Sat, 16 Jan 2021 19:04:37 +0100 (CET) From: Marek Vasut To: linux-mmc@vger.kernel.org Cc: Marek Vasut , Alexandre Torgue , Linus Walleij , Ludovic Barre , Ulf Hansson , linux-stm32@st-md-mailman.stormreply.com Subject: [PATCH 3/4] ARM: dts: stm32: Add additional init state for SDMMC1 pins Date: Sat, 16 Jan 2021 19:04:23 +0100 Message-Id: <20210116180424.57331-3-marex@denx.de> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210116180424.57331-1-marex@denx.de> References: <20210116180424.57331-1-marex@denx.de> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org Add "init" mux option for SDMMC1, where the CMD, CK, CKIN lines are not configured, so they can be claimed as GPIOs early on in driver probe(). This is used for probing optional voltage level translator. Signed-off-by: Marek Vasut Cc: Alexandre Torgue Cc: Linus Walleij Cc: Ludovic Barre Cc: Ulf Hansson Cc: linux-stm32@st-md-mailman.stormreply.com --- arch/arm/boot/dts/stm32mp15-pinctrl.dtsi | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git a/arch/arm/boot/dts/stm32mp15-pinctrl.dtsi b/arch/arm/boot/dts/stm32mp15-pinctrl.dtsi index d8297dfff3e6..687f3534ba22 100644 --- a/arch/arm/boot/dts/stm32mp15-pinctrl.dtsi +++ b/arch/arm/boot/dts/stm32mp15-pinctrl.dtsi @@ -1385,6 +1385,18 @@ pins { }; }; + sdmmc1_b4_init_pins_a: sdmmc1-b4-init-0 { + pins1 { + pinmux = , /* SDMMC1_D0 */ + , /* SDMMC1_D1 */ + , /* SDMMC1_D2 */ + ; /* SDMMC1_D3 */ + slew-rate = <1>; + drive-push-pull; + bias-disable; + }; + }; + sdmmc1_dir_pins_a: sdmmc1-dir-0 { pins1 { pinmux = , /* SDMMC1_D0DIR */ @@ -1409,6 +1421,17 @@ pins { }; }; + sdmmc1_dir_init_pins_a: sdmmc1-dir-init-0 { + pins1 { + pinmux = , /* SDMMC1_D0DIR */ + , /* SDMMC1_D123DIR */ + ; /* SDMMC1_CDIR */ + slew-rate = <1>; + drive-push-pull; + bias-pull-up; + }; + }; + sdmmc1_dir_pins_b: sdmmc1-dir-1 { pins1 { pinmux = , /* SDMMC1_D0DIR */ From patchwork Sat Jan 16 18:04:24 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marek Vasut X-Patchwork-Id: 364915 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=ham 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 91DCAC433E0 for ; Sat, 16 Jan 2021 18:05:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 60418224B2 for ; Sat, 16 Jan 2021 18:05:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727407AbhAPSFt (ORCPT ); Sat, 16 Jan 2021 13:05:49 -0500 Received: from mail-out.m-online.net ([212.18.0.9]:43946 "EHLO mail-out.m-online.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727379AbhAPSFq (ORCPT ); Sat, 16 Jan 2021 13:05:46 -0500 Received: from frontend01.mail.m-online.net (unknown [192.168.8.182]) by mail-out.m-online.net (Postfix) with ESMTP id 4DJ5Y41l0wz1qrf4; Sat, 16 Jan 2021 19:04:40 +0100 (CET) Received: from localhost (dynscan1.mnet-online.de [192.168.6.70]) by mail.m-online.net (Postfix) with ESMTP id 4DJ5Y41S40z1qqkt; Sat, 16 Jan 2021 19:04:40 +0100 (CET) X-Virus-Scanned: amavisd-new at mnet-online.de Received: from mail.mnet-online.de ([192.168.8.182]) by localhost (dynscan1.mail.m-online.net [192.168.6.70]) (amavisd-new, port 10024) with ESMTP id 6Qeg6PpsA83b; Sat, 16 Jan 2021 19:04:39 +0100 (CET) X-Auth-Info: X3irfXs859193Iay+aWMDKIsVW0n46LpyVMnnbNL5LU= Received: from tr.lan (ip-89-176-112-137.net.upcbroadband.cz [89.176.112.137]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.mnet-online.de (Postfix) with ESMTPSA; Sat, 16 Jan 2021 19:04:39 +0100 (CET) From: Marek Vasut To: linux-mmc@vger.kernel.org Cc: Marek Vasut , Alexandre Torgue , Linus Walleij , Ludovic Barre , Ulf Hansson , linux-stm32@st-md-mailman.stormreply.com Subject: [PATCH 4/4] ARM: dts: stm32: Enable voltage translator auto-detection on DHCOM Date: Sat, 16 Jan 2021 19:04:24 +0100 Message-Id: <20210116180424.57331-4-marex@denx.de> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210116180424.57331-1-marex@denx.de> References: <20210116180424.57331-1-marex@denx.de> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org The DHCOM SoM uSD slot has an optional voltage level translator, add DT bindings which permit the MMCI driver to detect the translator automatically. Signed-off-by: Marek Vasut Cc: Alexandre Torgue Cc: Linus Walleij Cc: Ludovic Barre Cc: Ulf Hansson Cc: linux-stm32@st-md-mailman.stormreply.com --- arch/arm/boot/dts/stm32mp15xx-dhcom-som.dtsi | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/arch/arm/boot/dts/stm32mp15xx-dhcom-som.dtsi b/arch/arm/boot/dts/stm32mp15xx-dhcom-som.dtsi index ff70bd03a017..661d8d071296 100644 --- a/arch/arm/boot/dts/stm32mp15xx-dhcom-som.dtsi +++ b/arch/arm/boot/dts/stm32mp15xx-dhcom-som.dtsi @@ -408,14 +408,19 @@ &rtc { }; &sdmmc1 { - pinctrl-names = "default", "opendrain", "sleep"; + pinctrl-names = "default", "opendrain", "sleep", "init"; pinctrl-0 = <&sdmmc1_b4_pins_a &sdmmc1_dir_pins_a>; pinctrl-1 = <&sdmmc1_b4_od_pins_a &sdmmc1_dir_pins_a>; pinctrl-2 = <&sdmmc1_b4_sleep_pins_a &sdmmc1_dir_sleep_pins_a>; + pinctrl-3 = <&sdmmc1_b4_init_pins_a &sdmmc1_dir_init_pins_a>; cd-gpios = <&gpiog 1 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>; disable-wp; st,sig-dir; st,neg-edge; + st,use-ckin; + st,cmd-gpios = <&gpiod 2 0>; + st,ck-gpios = <&gpioc 12 0>; + st,ckin-gpios = <&gpioe 4 0>; bus-width = <4>; vmmc-supply = <&vdd_sd>; status = "okay";