From patchwork Wed Jun 21 11:55:22 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Valentin Caron X-Patchwork-Id: 13287206 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 EC851C0015E for ; Wed, 21 Jun 2023 11:56:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231126AbjFUL4X (ORCPT ); Wed, 21 Jun 2023 07:56:23 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60988 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231253AbjFUL4U (ORCPT ); Wed, 21 Jun 2023 07:56:20 -0400 Received: from mx07-00178001.pphosted.com (mx08-00178001.pphosted.com [91.207.212.93]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2D2DF1731; Wed, 21 Jun 2023 04:56:16 -0700 (PDT) Received: from pps.filterd (m0046661.ppops.net [127.0.0.1]) by mx07-00178001.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 35L9T89i026287; Wed, 21 Jun 2023 13:55:57 +0200 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=foss.st.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding : content-type; s=selector1; bh=lQTcJI2yH3aZLIvv+1GOSfF0PqFT/I/N8lRqjd5MfH0=; b=eBTeRDcfs5GmlMiTco4J2o5ZVQhAGJwoxXPFx0xUmUKzuu0CYM8ZSLfB32Fv90y8go1B DK3B9MR7vkxMcO4g/BM2Ud4z7dCQtKP+QURvUPRkyhcKvZOkMcqOVJ6XuGF4oSHVGXXI Uj7MbvLy5lwyZk/PedtUCCY0LGtVC753WhADysZ+qayiEi6pyTutpDtgfsjO2vaInSW4 EmvI9E4hEf2ck4r+Ab0YXQLRMmX6kXEumFXTPH97sYbW7M5jVjfgEgq9lBw56FI0wJ08 kOp0KXBm6eIpIojoBJv1vD3W/Dl5nELY+YxHOr9WbwepyI9qn+uNvIYo+sRPYt/hIDMS /w== Received: from beta.dmz-eu.st.com (beta.dmz-eu.st.com [164.129.1.35]) by mx07-00178001.pphosted.com (PPS) with ESMTPS id 3rbxm3rygm-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 21 Jun 2023 13:55:57 +0200 Received: from euls16034.sgp.st.com (euls16034.sgp.st.com [10.75.44.20]) by beta.dmz-eu.st.com (STMicroelectronics) with ESMTP id DADA810006A; Wed, 21 Jun 2023 13:55:54 +0200 (CEST) Received: from Webmail-eu.st.com (shfdag1node1.st.com [10.75.129.69]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id CE9F6237D9A; Wed, 21 Jun 2023 13:55:54 +0200 (CEST) Received: from localhost (10.201.20.168) by SHFDAG1NODE1.st.com (10.75.129.69) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.21; Wed, 21 Jun 2023 13:55:54 +0200 From: Valentin Caron To: Mark Brown , Rob Herring , Krzysztof Kozlowski , Conor Dooley CC: Alexandre Torgue , Alain Volmat , , , , , , Valentin Caron Subject: [PATCH 1/2] spi: stm32: disable device mode with st,stm32f4-spi compatible Date: Wed, 21 Jun 2023 13:55:22 +0200 Message-ID: <20230621115523.923176-2-valentin.caron@foss.st.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230621115523.923176-1-valentin.caron@foss.st.com> References: <20230621115523.923176-1-valentin.caron@foss.st.com> MIME-Version: 1.0 X-Originating-IP: [10.201.20.168] X-ClientProxiedBy: EQNCAS1NODE4.st.com (10.75.129.82) To SHFDAG1NODE1.st.com (10.75.129.69) X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.957,Hydra:6.0.591,FMLib:17.11.176.26 definitions=2023-06-21_07,2023-06-16_01,2023-05-22_02 Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org STM32 SPI driver is not capable to handle device mode with stm32f4/f7 soc. Stop probing if this case happens. Signed-off-by: Valentin Caron --- drivers/spi/spi-stm32.c | 15 ++++++++++++--- 1 file changed, 12 insertions(+), 3 deletions(-) diff --git a/drivers/spi/spi-stm32.c b/drivers/spi/spi-stm32.c index 6d10fa4ab783..f71712af43d4 100644 --- a/drivers/spi/spi-stm32.c +++ b/drivers/spi/spi-stm32.c @@ -238,6 +238,7 @@ struct stm32_spi; * @baud_rate_div_min: minimum baud rate divisor * @baud_rate_div_max: maximum baud rate divisor * @has_fifo: boolean to know if fifo is used for driver + * @has_device_mode: is this compatible capable to switch on device mode * @flags: compatible specific SPI controller flags used at registration time */ struct stm32_spi_cfg { @@ -259,6 +260,7 @@ struct stm32_spi_cfg { unsigned int baud_rate_div_min; unsigned int baud_rate_div_max; bool has_fifo; + bool has_device_mode; u16 flags; }; @@ -1750,6 +1752,7 @@ static const struct stm32_spi_cfg stm32f4_spi_cfg = { .baud_rate_div_min = STM32F4_SPI_BR_DIV_MIN, .baud_rate_div_max = STM32F4_SPI_BR_DIV_MAX, .has_fifo = false, + .has_device_mode = false, .flags = SPI_MASTER_MUST_TX, }; @@ -1774,6 +1777,7 @@ static const struct stm32_spi_cfg stm32h7_spi_cfg = { .baud_rate_div_min = STM32H7_SPI_MBR_DIV_MIN, .baud_rate_div_max = STM32H7_SPI_MBR_DIV_MAX, .has_fifo = true, + .has_device_mode = true, }; static const struct of_device_id stm32_spi_of_match[] = { @@ -1798,8 +1802,15 @@ static int stm32_spi_probe(struct platform_device *pdev) struct device_node *np = pdev->dev.of_node; bool device_mode; int ret; + const struct of_device_id *of_match = + of_match_device(pdev->dev.driver->of_match_table, &pdev->dev); + const struct stm32_spi_cfg *cfg = (const struct stm32_spi_cfg *)of_match->data; device_mode = of_property_read_bool(np, "spi-slave"); + if (!cfg->has_device_mode && device_mode) { + dev_err(&pdev->dev, "spi-slave not yet supported with %s\n", of_match->compatible); + return -EPERM; + } if (device_mode) ctrl = devm_spi_alloc_slave(&pdev->dev, sizeof(struct stm32_spi)); @@ -1817,9 +1828,7 @@ static int stm32_spi_probe(struct platform_device *pdev) spi->device_mode = device_mode; spin_lock_init(&spi->lock); - spi->cfg = (const struct stm32_spi_cfg *) - of_match_device(pdev->dev.driver->of_match_table, - &pdev->dev)->data; + spi->cfg = cfg; spi->base = devm_platform_get_and_ioremap_resource(pdev, 0, &res); if (IS_ERR(spi->base))