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spi: spi-fsl-lpspi: support multiple cs for lpspi 

support to get chip select number from DT file.

Signed-off-by: Han Xu <han.xu@nxp.com>
Link: https://lore.kernel.org/r/20221206225410.604482-1-han.xu@nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Han Xu 2022-12-06 16:54:09 -06:00 committed by Mark Brown
parent 7073888c86
commit 5f947746f0
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GPG Key ID: 24D68B725D5487D0
1 changed files with 5 additions and 0 deletions
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5
drivers/spi/spi-fsl-lpspi.c
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@ -98,6 +98,7 @@ struct fsl_lpspi_data {
struct clk *clk_ipg;
struct clk *clk_per;
bool is_slave;
u32 num_cs;
bool is_only_cs1;
bool is_first_byte;
@ -840,6 +841,9 @@ static int fsl_lpspi_probe(struct platform_device *pdev)
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");
if (of_property_read_u32((&pdev->dev)->of_node, "num-cs",
&fsl_lpspi->num_cs))
fsl_lpspi->num_cs = 1;
controller->bits_per_word_mask = SPI_BPW_RANGE_MASK(8, 32);
controller->transfer_one = fsl_lpspi_transfer_one;
@ -849,6 +853,7 @@ static int fsl_lpspi_probe(struct platform_device *pdev)
controller->flags = SPI_MASTER_MUST_RX | SPI_MASTER_MUST_TX;
controller->dev.of_node = pdev->dev.of_node;
controller->bus_num = pdev->id;
controller->num_chipselect = fsl_lpspi->num_cs;
controller->slave_abort = fsl_lpspi_slave_abort;
if (!fsl_lpspi->is_slave)
controller->use_gpio_descriptors = true;