From patchwork Fri Apr 28 12:15:23 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Valentin Caron X-Patchwork-Id: 13226345 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 B020AC77B61 for ; Fri, 28 Apr 2023 12:17:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232019AbjD1MRk (ORCPT ); Fri, 28 Apr 2023 08:17:40 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56410 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229873AbjD1MRj (ORCPT ); Fri, 28 Apr 2023 08:17:39 -0400 Received: from mx07-00178001.pphosted.com (mx08-00178001.pphosted.com [91.207.212.93]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5FFAE6182; Fri, 28 Apr 2023 05:17:26 -0700 (PDT) Received: from pps.filterd (m0046660.ppops.net [127.0.0.1]) by mx07-00178001.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 33S8i5kq027432; Fri, 28 Apr 2023 14:17:16 +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=uLm/HGEnqROJmmncqly7r5V/8GYfRwITdoBvoKdZJsg=; b=TEy2wpOgHqwyo4cNbCD5pzo1wSK8nOwyPyUkFBG++gDsGjNwPlPclHU5tVfoaCkBvSqM KRw3rkQHRpYwRDg5QeF0T3NxHNZ8ah24s0f0iszQWTmvoHDMSY5CRhNCO0JVnh5iG+7H 6a3a2Pfptvox70FDa8d1+PBAHE+Bq+EctRE7tNNgK0nG9H0gyD7EBhFH5lJ/SXhoeYFv LwWTRKtw1oaLeLM6xBu5rhcf0hISxqIpZNGZJpyTZK0WlutV05Fg7LYPLnEFbDSJL7qy d5jAspoXny7ceM6WMGXuG67LYxhgNDzLIuKjsssGRK/xQ3huSH1tAzwErF/bziHNZhNE 8w== 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 3q87qfu0y2-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 28 Apr 2023 14:17:16 +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 E3DA1100034; Fri, 28 Apr 2023 14:17:15 +0200 (CEST) Received: from Webmail-eu.st.com (shfdag1node1.st.com [10.75.129.69]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id D6B86227EF5; Fri, 28 Apr 2023 14:17:15 +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; Fri, 28 Apr 2023 14:17:15 +0200 From: Valentin Caron To: Mark Brown , Rob Herring , Krzysztof Kozlowski , Alexandre Torgue , Alain Volmat CC: , , , , , Valentin Caron Subject: [PATCH 6/7] dt-bindings: spi: stm32: add stm32h7 st,spi-slave-underrun property Date: Fri, 28 Apr 2023 14:15:23 +0200 Message-ID: <20230428121524.2125832-7-valentin.caron@foss.st.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230428121524.2125832-1-valentin.caron@foss.st.com> References: <20230428121524.2125832-1-valentin.caron@foss.st.com> MIME-Version: 1.0 X-Originating-IP: [10.201.20.168] X-ClientProxiedBy: SHFCAS1NODE2.st.com (10.75.129.73) To SHFDAG1NODE1.st.com (10.75.129.69) X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.942,Hydra:6.0.573,FMLib:17.11.170.22 definitions=2023-04-28_04,2023-04-27_01,2023-02-09_01 Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org This property is used to enable and configure stm32h7 SPI controller to handle underrun that could appear in slave mode. Signed-off-by: Valentin Caron --- .../devicetree/bindings/spi/st,stm32-spi.yaml | 8 ++++++++ MAINTAINERS | 1 + include/dt-bindings/spi/spi-stm32.h | 15 +++++++++++++++ 3 files changed, 24 insertions(+) create mode 100644 include/dt-bindings/spi/spi-stm32.h diff --git a/Documentation/devicetree/bindings/spi/st,stm32-spi.yaml b/Documentation/devicetree/bindings/spi/st,stm32-spi.yaml index 1d26fa2658c5..e946ea71a247 100644 --- a/Documentation/devicetree/bindings/spi/st,stm32-spi.yaml +++ b/Documentation/devicetree/bindings/spi/st,stm32-spi.yaml @@ -28,6 +28,7 @@ allOf: properties: st,spi-midi-ns: false spi-slave: false + st,spi-slave-underrun: false properties: "#address-cells": true @@ -70,6 +71,13 @@ properties: In case of spi-slave defined, if <0>, indicate that SS should be detected via the dedicated HW pin + st,spi-slave-underrun: + $ref: /schemas/types.yaml#/definitions/uint32-array + description: + First parameter enables and selects slave underrun reaction. + Refer to "dt-bindings/spi/spi-stm32.h" for the supported values. + Second parameter is the pattern in case of SPI_SEND_PATTERN mode. + patternProperties: "^[a-zA-Z][a-zA-Z0-9,+\\-._]{0,63}@[0-9a-f]+$": type: object diff --git a/MAINTAINERS b/MAINTAINERS index 007a9cdb9cc8..9dcf861834fd 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -19790,6 +19790,7 @@ M: Alain Volmat L: linux-spi@vger.kernel.org S: Maintained F: drivers/spi/spi-stm32.c +F: include/dt-bindings/spi/spi-stm32.h ST STPDDC60 DRIVER M: Daniel Nilsson diff --git a/include/dt-bindings/spi/spi-stm32.h b/include/dt-bindings/spi/spi-stm32.h new file mode 100644 index 000000000000..260109fd1631 --- /dev/null +++ b/include/dt-bindings/spi/spi-stm32.h @@ -0,0 +1,15 @@ +/* SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-3-Clause) */ +/* + * This header provides constants for STM32_SPI bindings. + */ + +#ifndef _DT_BINDINGS_SPI_SPI_STM32_H +#define _DT_BINDINGS_SPI_SPI_STM32_H + +/* st,spi-slave-underrun first parameter */ +#define SPI_NO_ACTION 0 +#define SPI_SEND_PATTERN 1 +#define SPI_REPEAT_LAST_RECEIVED_DATA 2 +#define SPI_REPEAT_LAST_TRANSMITTED_DATA 3 + +#endif