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Mon, 3 Aug 2026 12:40:52 +0000 From: Changhuang Liang To: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Mark Brown Cc: Sudip Mukherjee , Serge Semin , linux-spi@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, Changhuang Liang Subject: [PATCH v2 01/11] spi: dw: Introduce spi_frf and STD_SPI Date: Mon, 3 Aug 2026 05:40:34 -0700 Message-Id: <20260803124044.156998-2-changhuang.liang@starfivetech.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20260803124044.156998-1-changhuang.liang@starfivetech.com> References: <20260803124044.156998-1-changhuang.liang@starfivetech.com> Content-Transfer-Encoding: 8bit Content-Type: text/plain X-ClientProxiedBy: SHXPR01CA0023.CHNPR01.prod.partner.outlook.cn (2406:e500:c311:1b::32) To ZQ4PR01MB1202.CHNPR01.prod.partner.outlook.cn (2406:e500:c550:17::6) Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: ZQ4PR01MB1202:EE_|ZQ4PR01MB1267:EE_ X-MS-Office365-Filtering-Correlation-Id: 46f7c7d6-11d3-4842-12b6-08def15c7479 X-MS-Exchange-SenderADCheck: 1 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|52116014|1800799024|366016|23010399003|38350700014|10067099003|56012099006|22082099003|18002099003; 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Without enhanced mode, these controllers will work in the standard spi mode. Signed-off-by: Sudip Mukherjee Co-developed-by: Changhuang Liang Signed-off-by: Changhuang Liang --- drivers/spi/spi-dw-core.c | 13 ++++++++++++- drivers/spi/spi-dw.h | 7 +++++++ 2 files changed, 19 insertions(+), 1 deletion(-) diff --git a/drivers/spi/spi-dw-core.c b/drivers/spi/spi-dw-core.c index eff08461c2f5..86e3e7487bc7 100644 --- a/drivers/spi/spi-dw-core.c +++ b/drivers/spi/spi-dw-core.c @@ -330,6 +330,16 @@ void dw_spi_update_config(struct dw_spi *dws, struct spi_device *spi, /* CTRLR0[11:10] Transfer Mode */ cr0 |= FIELD_PREP(DW_HSSI_CTRLR0_TMOD_MASK, cfg->tmode); + if (dw_spi_ver_is_ge(dws, HSSI, 103A)) { + cr0 &= ~DW_HSSI_CTRLR0_SPI_FRF_MASK; + cr0 |= FIELD_PREP(DW_HSSI_CTRLR0_SPI_FRF_MASK, + cfg->spi_frf); + } else if (dw_spi_ver_is_ge(dws, PSSI, 400A)) { + cr0 &= ~DW_PSSI_CTRLR0_SPI_FRF_MASK; + cr0 |= FIELD_PREP(DW_PSSI_CTRLR0_SPI_FRF_MASK, + cfg->spi_frf); + } + dw_writel(dws, DW_SPI_CTRLR0, cr0); if (spi_controller_is_target(dws->ctlr)) @@ -422,6 +432,7 @@ static int dw_spi_transfer_one(struct spi_controller *ctlr, .tmode = DW_SPI_CTRLR0_TMOD_TR, .dfs = transfer->bits_per_word, .freq = transfer->speed_hz, + .spi_frf = DW_SPI_CTRLR0_SPI_FRF_STD_SPI, }; int ret; @@ -677,7 +688,7 @@ static void dw_spi_stop_mem_op(struct dw_spi *dws, struct spi_device *spi) static int dw_spi_exec_mem_op(struct spi_mem *mem, const struct spi_mem_op *op) { struct dw_spi *dws = spi_controller_get_devdata(mem->spi->controller); - struct dw_spi_cfg cfg; + struct dw_spi_cfg cfg = {0}; unsigned long flags; int ret; diff --git a/drivers/spi/spi-dw.h b/drivers/spi/spi-dw.h index 2f2debc64e73..19cf1b1a5d4f 100644 --- a/drivers/spi/spi-dw.h +++ b/drivers/spi/spi-dw.h @@ -17,6 +17,9 @@ /* Synopsys DW SSI component versions (FourCC sequence) */ #define DW_HSSI_102A 0x3130322a +#define DW_HSSI_103A 0x3130332a +#define DW_HSSI_200A 0x3230302a +#define DW_PSSI_400A 0x3430302a /* DW SSI IP-core ID and version check helpers */ #define dw_spi_ip_is(_dws, _ip) \ @@ -94,6 +97,9 @@ #define DW_HSSI_CTRLR0_TMOD_MASK GENMASK(11, 10) #define DW_HSSI_CTRLR0_SRL BIT(13) #define DW_HSSI_CTRLR0_MST BIT(31) +#define DW_HSSI_CTRLR0_SPI_FRF_MASK GENMASK(23, 22) +#define DW_PSSI_CTRLR0_SPI_FRF_MASK GENMASK(22, 21) +#define DW_SPI_CTRLR0_SPI_FRF_STD_SPI 0x0 /* Bit fields in CTRLR1 */ #define DW_SPI_NDF_MASK GENMASK(15, 0) @@ -135,6 +141,7 @@ struct dw_spi_cfg { u8 dfs; u32 ndf; u32 freq; + u8 spi_frf; }; struct dw_spi; -- 2.25.1