From patchwork Mon May 4 13:02:44 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wan Ahmad Zainie X-Patchwork-Id: 201152 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=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, 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 71CDBC4725E for ; Mon, 4 May 2020 13:04:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4A77D2073B for ; Mon, 4 May 2020 13:04:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727806AbgEDNEi (ORCPT ); Mon, 4 May 2020 09:04:38 -0400 Received: from mga05.intel.com ([192.55.52.43]:6156 "EHLO mga05.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726351AbgEDNEi (ORCPT ); Mon, 4 May 2020 09:04:38 -0400 IronPort-SDR: 9rXoPjuLN1pirf030DlFsV3RcnxKwXCtmSb5dITtI93Z/nKo4dCY9H6PkUng0Jb5b//oH55OdK yPd7sahNKTTg== X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by fmsmga105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 04 May 2020 06:04:02 -0700 IronPort-SDR: HlYQI4d3Q8q7OdfVV3iIJ2JeSyclQtt/4vyTH8Iwk/J50QfcLrVo/wOAykWwwjDd3l9xxMr4Wx X9C9gm3isK0Q== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.73,352,1583222400"; d="scan'208";a="249169134" Received: from wwanmoha-ilbpg2.png.intel.com ([10.88.227.42]) by fmsmga007.fm.intel.com with ESMTP; 04 May 2020 06:04:00 -0700 From: Wan Ahmad Zainie To: broonie@kernel.org, robh+dt@kernel.org Cc: linux-spi@vger.kernel.org, devicetree@vger.kernel.org, andriy.shevchenko@linux.intel.com, wan.ahmad.zainie.wan.mohamad@intel.com Subject: [PATCH v4 5/7] spi: dw: Add support for Intel Keem Bay SPI Date: Mon, 4 May 2020 21:02:44 +0800 Message-Id: <20200504130246.5135-6-wan.ahmad.zainie.wan.mohamad@intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200504130246.5135-1-wan.ahmad.zainie.wan.mohamad@intel.com> References: <20200504130246.5135-1-wan.ahmad.zainie.wan.mohamad@intel.com> Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Add support for Intel Keem Bay SPI controller, which uses DesignWare DWC_ssi core. Bit 31 of CTRLR0 register is added for Keem Bay, to configure the device as a master or as a slave serial peripheral. Signed-off-by: Wan Ahmad Zainie Reviewed-by: Andy Shevchenko --- drivers/spi/spi-dw-mmio.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/drivers/spi/spi-dw-mmio.c b/drivers/spi/spi-dw-mmio.c index 1df6f3deee2c..abd3bb5e52db 100644 --- a/drivers/spi/spi-dw-mmio.c +++ b/drivers/spi/spi-dw-mmio.c @@ -44,6 +44,13 @@ struct dw_spi_mmio { #define MSCC_SPI_MST_SW_MODE_SW_PIN_CTRL_MODE BIT(13) #define MSCC_SPI_MST_SW_MODE_SW_SPI_CS(x) (x << 5) +/* + * For Keem Bay, CTRLR0[31] is used to select controller mode. + * 0: SSI is slave + * 1: SSI is master + */ +#define KEEMBAY_CTRLR0_SSIC_IS_MST BIT(31) + struct dw_spi_mscc { struct regmap *syscon; void __iomem *spi_mst; @@ -155,6 +162,24 @@ static int dw_spi_dwc_ssi_init(struct platform_device *pdev, return 0; } +static u32 dw_spi_update_cr0_keembay(struct spi_controller *master, + struct spi_device *spi, + struct spi_transfer *transfer) +{ + u32 cr0 = dw_spi_update_cr0_v1_01a(master, spi, transfer); + + return cr0 | KEEMBAY_CTRLR0_SSIC_IS_MST; +} + +static int dw_spi_keembay_init(struct platform_device *pdev, + struct dw_spi_mmio *dwsmmio) +{ + /* Register hook to configure CTRLR0 */ + dwsmmio->dws.update_cr0 = dw_spi_update_cr0_keembay; + + return 0; +} + static int dw_spi_mmio_probe(struct platform_device *pdev) { int (*init_func)(struct platform_device *pdev, @@ -254,6 +279,7 @@ static const struct of_device_id dw_spi_mmio_of_match[] = { { .compatible = "amazon,alpine-dw-apb-ssi", .data = dw_spi_alpine_init}, { .compatible = "renesas,rzn1-spi", .data = dw_spi_dw_apb_init}, { .compatible = "snps,dwc-ssi-1.01a", .data = dw_spi_dwc_ssi_init}, + { .compatible = "intel,keembay-ssi", .data = dw_spi_keembay_init}, { /* end of table */} }; MODULE_DEVICE_TABLE(of, dw_spi_mmio_of_match);