MCUX Flexcomm SPI: Add Slave support (99f24aea) · Commits · Wenxi XU / zephyr

drivers/spi/spi_mcux_flexcomm.c

+72 −36

Original line number	Diff line number	Diff line
		@@ -102,7 +102,7 @@ static void spi_mcux_isr(void *arg)
		SPI_MasterTransferHandleIRQ(base, &data->handle);
		}

		static void spi_mcux_master_transfer_callback(SPI_Type *base,
		static void spi_mcux_transfer_callback(SPI_Type *base,
		spi_master_handle_t handle, status_t status, void userData)
		{
		struct device *dev = userData;
		@@ -120,7 +120,6 @@ static int spi_mcux_configure(struct device *dev,
		const struct spi_mcux_config *config = dev->config;
		struct spi_mcux_data *data = dev->data;
		SPI_Type *base = config->base;
		spi_master_config_t master_config;
		uint32_t clock_freq;
		uint32_t word_size;

		@@ -129,6 +128,20 @@ static int spi_mcux_configure(struct device *dev,
		return 0;
		}

		word_size = SPI_WORD_SIZE_GET(spi_cfg->operation);
		if (word_size > SPI_MAX_DATA_WIDTH) {
		LOG_ERR("Word size %d is greater than %d",
		word_size, SPI_MAX_DATA_WIDTH);
		return -EINVAL;
		}

		/*
		* Do master or slave initializastion, depending on the
		* mode requested.
		*/
		if (SPI_OP_MODE_GET(spi_cfg->operation) == SPI_OP_MODE_MASTER) {
		spi_master_config_t master_config;

		SPI_MasterGetDefaultConfig(&master_config);

		if (spi_cfg->slave > SPI_CHIP_SELECT_COUNT) {
		@@ -137,13 +150,6 @@ static int spi_mcux_configure(struct device *dev,
		return -EINVAL;
		}

		word_size = SPI_WORD_SIZE_GET(spi_cfg->operation);
		if (word_size > SPI_MAX_DATA_WIDTH) {
		LOG_ERR("Word size %d is greater than %d",
		word_size, SPI_MAX_DATA_WIDTH);
		return -EINVAL;
		}

		master_config.sselNum = spi_cfg->slave;
		master_config.sselPol = kSPI_SpolActiveAllLow;
		master_config.dataWidth = word_size - 1;
		@@ -174,12 +180,42 @@ static int spi_mcux_configure(struct device *dev,
		SPI_MasterInit(base, &master_config, clock_freq);

		SPI_MasterTransferCreateHandle(base, &data->handle,
		spi_mcux_master_transfer_callback, dev);
		spi_mcux_transfer_callback, dev);

		SPI_SetDummyData(base, 0);

		data->ctx.config = spi_cfg;
		spi_context_cs_configure(&data->ctx);
		} else {
		spi_slave_config_t slave_config;

		SPI_SlaveGetDefaultConfig(&slave_config);

		slave_config.polarity =
		(SPI_MODE_GET(spi_cfg->operation) & SPI_MODE_CPOL)
		? kSPI_ClockPolarityActiveLow
		: kSPI_ClockPolarityActiveHigh;

		slave_config.phase =
		(SPI_MODE_GET(spi_cfg->operation) & SPI_MODE_CPHA)
		? kSPI_ClockPhaseSecondEdge
		: kSPI_ClockPhaseFirstEdge;

		slave_config.direction =
		(spi_cfg->operation & SPI_TRANSFER_LSB)
		? kSPI_LsbFirst
		: kSPI_MsbFirst;

		/* SS pin active low */
		slave_config.sselPol = kSPI_SpolActiveAllLow;
		slave_config.dataWidth = word_size - 1;

		SPI_SlaveInit(base, &slave_config);

		SPI_SlaveTransferCreateHandle(base, &data->handle,
		spi_mcux_transfer_callback, dev);
		}

		data->ctx.config = spi_cfg;

		return 0;
		}

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