spi: lpspi: fix using CS discontinuously on i.MX8DXLEVK (2a052590) · Commits · 戴 / test

drivers/spi/spi-fsl-lpspi.c

+8 −3

Original line number	Diff line number	Diff line
		@@ -98,6 +98,7 @@ struct fsl_lpspi_data {
		struct clk *clk_ipg;
		struct clk *clk_per;
		bool is_slave;
		bool is_only_cs1;
		bool is_first_byte;

		void *rx_buf;
		@@ -257,10 +258,9 @@ static void fsl_lpspi_set_cmd(struct fsl_lpspi_data *fsl_lpspi)

		temp \|= fsl_lpspi->config.bpw - 1;
		temp \|= (fsl_lpspi->config.mode & 0x3) << 30;
		temp \|= (fsl_lpspi->config.chip_select & 0x3) << 24;
		if (!fsl_lpspi->is_slave) {
		temp \|= fsl_lpspi->config.prescale << 27;
		temp \|= (fsl_lpspi->config.chip_select & 0x3) << 24;

		/*
		* Set TCR_CONT will keep SS asserted after current transfer.
		* For the first transfer, clear TCR_CONTC to assert SS.
		@@ -421,6 +421,9 @@ static int fsl_lpspi_setup_transfer(struct spi_controller *controller,
		fsl_lpspi->config.mode = spi->mode;
		fsl_lpspi->config.bpw = t->bits_per_word;
		fsl_lpspi->config.speed_hz = t->speed_hz;
		if (fsl_lpspi->is_only_cs1)
		fsl_lpspi->config.chip_select = 1;
		else
		fsl_lpspi->config.chip_select = spi->chip_select;

		if (!fsl_lpspi->config.speed_hz)
		@@ -835,6 +838,8 @@ static int fsl_lpspi_probe(struct platform_device *pdev)
		fsl_lpspi = spi_controller_get_devdata(controller);
		fsl_lpspi->dev = &pdev->dev;
		fsl_lpspi->is_slave = is_slave;
		fsl_lpspi->is_only_cs1 = of_property_read_bool((&pdev->dev)->of_node,
		"fsl,spi-only-use-cs1-sel");

		controller->bits_per_word_mask = SPI_BPW_RANGE_MASK(8, 32);
		controller->transfer_one = fsl_lpspi_transfer_one;