From patchwork Wed Feb 26 09:36:54 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pratyush Yadav X-Patchwork-Id: 11405719 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 8A3C192A for ; Wed, 26 Feb 2020 09:38:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6A3E024653 for ; Wed, 26 Feb 2020 09:38:21 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=ti.com header.i=@ti.com header.b="K6EPpPzR" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727877AbgBZJhh (ORCPT ); Wed, 26 Feb 2020 04:37:37 -0500 Received: from lelv0143.ext.ti.com ([198.47.23.248]:40056 "EHLO lelv0143.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726541AbgBZJhh (ORCPT ); Wed, 26 Feb 2020 04:37:37 -0500 Received: from lelv0265.itg.ti.com ([10.180.67.224]) by lelv0143.ext.ti.com (8.15.2/8.15.2) with ESMTP id 01Q9bHK2087084; Wed, 26 Feb 2020 03:37:17 -0600 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1582709837; bh=/RvMu+KBpcqEDFVBnIWtjiFPQ2qCDkAs2AiQIuWdFws=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=K6EPpPzRPSk4gsirOoI1fBp5truy0/o8R/d1P37k3XGPD9cbcVIhzmmEkU8XA4UO8 XCt4AtdJCY4rouVI64SzqfNU6w30qSYbkkVpf11Yo8Xoyi855W2yZMYDaIwCCOGMQc wJ/3zOV6EfUHDvbLVapgTz2frUoo/TmTXEqezsNI= Received: from DLEE115.ent.ti.com (dlee115.ent.ti.com [157.170.170.26]) by lelv0265.itg.ti.com (8.15.2/8.15.2) with ESMTPS id 01Q9bHVR118717 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=FAIL); Wed, 26 Feb 2020 03:37:17 -0600 Received: from DLEE101.ent.ti.com (157.170.170.31) by DLEE115.ent.ti.com (157.170.170.26) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1847.3; Wed, 26 Feb 2020 03:37:17 -0600 Received: from lelv0327.itg.ti.com (10.180.67.183) by DLEE101.ent.ti.com (157.170.170.31) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1847.3 via Frontend Transport; Wed, 26 Feb 2020 03:37:17 -0600 Received: from pratyush-OptiPlex-790.dhcp.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by lelv0327.itg.ti.com (8.15.2/8.15.2) with ESMTP id 01Q9b4A7110613; Wed, 26 Feb 2020 03:37:13 -0600 From: Pratyush Yadav To: Tudor Ambarus , Miquel Raynal , Richard Weinberger , Vignesh Raghavendra , Mark Brown , Rob Herring , Mark Rutland CC: Pratyush Yadav , , , , , Sekhar Nori Subject: [PATCH v2 02/11] spi: set mode bits for "spi-rx-dtr" and "spi-tx-dtr" Date: Wed, 26 Feb 2020 15:06:54 +0530 Message-ID: <20200226093703.19765-3-p.yadav@ti.com> X-Mailer: git-send-email 2.25.0 In-Reply-To: <20200226093703.19765-1-p.yadav@ti.com> References: <20200226093703.19765-1-p.yadav@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Sender: linux-spi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org These two DT properties express DTR receive and transmit capabilities of a SPI flash and controller. Introduce two new mode bits: SPI_RX_DTR and SPI_TX_DTR which correspond to the new DT properties. Set these bits when the two corresponding properties are present in the device tree. Also update the detection of unsupported mode bits to include the new bits. Signed-off-by: Pratyush Yadav --- drivers/spi/spi.c | 10 +++++++++- include/linux/spi/spi.h | 2 ++ 2 files changed, 11 insertions(+), 1 deletion(-) diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index 38b4c78df506..25c8ed9343f9 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -1927,6 +1927,13 @@ static int of_spi_parse_dt(struct spi_controller *ctlr, struct spi_device *spi, } } + /* Device DTR mode. */ + if (of_property_read_bool(nc, "spi-tx-dtr")) + spi->mode |= SPI_TX_DTR; + + if (of_property_read_bool(nc, "spi-rx-dtr")) + spi->mode |= SPI_RX_DTR; + if (spi_controller_is_slave(ctlr)) { if (!of_node_name_eq(nc, "slave")) { dev_err(&ctlr->dev, "%pOF is not called 'slave'\n", @@ -3252,7 +3259,8 @@ int spi_setup(struct spi_device *spi) bad_bits &= ~SPI_CS_HIGH; ugly_bits = bad_bits & (SPI_TX_DUAL | SPI_TX_QUAD | SPI_TX_OCTAL | - SPI_RX_DUAL | SPI_RX_QUAD | SPI_RX_OCTAL); + SPI_RX_DUAL | SPI_RX_QUAD | SPI_RX_OCTAL | + SPI_TX_DTR | SPI_RX_DTR); if (ugly_bits) { dev_warn(&spi->dev, "setup: ignoring unsupported mode bits %x\n", diff --git a/include/linux/spi/spi.h b/include/linux/spi/spi.h index 6d16ba01ff5a..bf1108318389 100644 --- a/include/linux/spi/spi.h +++ b/include/linux/spi/spi.h @@ -183,6 +183,8 @@ struct spi_device { #define SPI_TX_OCTAL 0x2000 /* transmit with 8 wires */ #define SPI_RX_OCTAL 0x4000 /* receive with 8 wires */ #define SPI_3WIRE_HIZ 0x8000 /* high impedance turnaround */ +#define SPI_RX_DTR 0x10000 /* receive in DTR mode */ +#define SPI_TX_DTR 0x20000 /* transmit in DTR mode */ int irq; void *controller_state; void *controller_data;