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Tue, 24 Jun 2025 03:36:36 -0700 (PDT) Received: from ho-tower-lan.lan ([37.18.136.128]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-453646cb641sm143398245e9.3.2025.06.24.03.36.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 24 Jun 2025 03:36:35 -0700 (PDT) From: James Clark Date: Tue, 24 Jun 2025 11:35:33 +0100 Subject: [PATCH v3 3/6] spi: spi-fsl-dspi: Stub out DMA functions Precedence: bulk X-Mailing-List: linux-spi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20250624-james-nxp-spi-dma-v3-3-e7d574f5f62c@linaro.org> References: <20250624-james-nxp-spi-dma-v3-0-e7d574f5f62c@linaro.org> In-Reply-To: <20250624-james-nxp-spi-dma-v3-0-e7d574f5f62c@linaro.org> To: Vladimir Oltean , Mark Brown , Vladimir Oltean , Arnd Bergmann , Larisa Grigore , Frank Li , Christoph Hellwig Cc: linux-spi@vger.kernel.org, imx@lists.linux.dev, linux-kernel@vger.kernel.org, James Clark X-Mailer: b4 0.14.0 This will allow the build to succeed with !CONFIG_HAS_DMA, either due to a randconfig build test or when the target only uses one of the non-DMA transfer modes which this driver supports. Signed-off-by: James Clark --- drivers/spi/spi-fsl-dspi.c | 17 +++++++++++++++-- 1 file changed, 15 insertions(+), 2 deletions(-) diff --git a/drivers/spi/spi-fsl-dspi.c b/drivers/spi/spi-fsl-dspi.c index feb29bb92a77..8212c4193536 100644 --- a/drivers/spi/spi-fsl-dspi.c +++ b/drivers/spi/spi-fsl-dspi.c @@ -373,6 +373,8 @@ struct fsl_dspi { void (*dev_to_host)(struct fsl_dspi *dspi, u32 rxdata); }; +static void dspi_setup_accel(struct fsl_dspi *dspi); + static bool is_s32g_dspi(struct fsl_dspi *data) { return data->devtype_data == &devtype_data[S32G] || @@ -489,6 +491,7 @@ static void dspi_push_rx(struct fsl_dspi *dspi, u32 rxdata) dspi->dev_to_host(dspi, rxdata); } +#if IS_ENABLED(CONFIG_HAS_DMA) static void dspi_tx_dma_callback(void *arg) { struct fsl_dspi *dspi = arg; @@ -589,8 +592,6 @@ static int dspi_next_xfer_dma_submit(struct fsl_dspi *dspi) return 0; } -static void dspi_setup_accel(struct fsl_dspi *dspi); - static void dspi_dma_xfer(struct fsl_dspi *dspi) { struct spi_message *message = dspi->cur_msg; @@ -722,6 +723,18 @@ static void dspi_release_dma(struct fsl_dspi *dspi) dma_release_channel(dma->chan_rx); } } +#else +static void dspi_dma_xfer(struct fsl_dspi *dspi) +{ + sdpi->cur_msg->status = -EINVAL; +} +static int dspi_request_dma(struct fsl_dspi *dspi, phys_addr_t phy_addr) +{ + dev_err(&dspi->pdev->dev, "DMA support not enabled in kernel\n"); + return -EINVAL; +} +static void dspi_release_dma(struct fsl_dspi *dspi) {} +#endif static void hz_to_spi_baud(char *pbr, char *br, int speed_hz, unsigned long clkrate, bool mtf_enabled) -- 2.34.1