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Message-Id: <20221206225410.604482-1-han.xu@nxp.com>
Date: Tue, 6 Dec 2022 16:54:09 -0600
From: Han Xu <han.xu@....com>
To: broonie@...nel.org, linux-spi@...r.kernel.org,
linux-kernel@...r.kernel.org, robh+dt@...nel.org,
krzysztof.kozlowski+dt@...aro.org
Cc: han.xu@....com
Subject: [PATCH 1/2] 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@....com>
---
drivers/spi/spi-fsl-lpspi.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/spi/spi-fsl-lpspi.c b/drivers/spi/spi-fsl-lpspi.c
index 6454b88c31fe..7f0562ed4d09 100644
--- a/drivers/spi/spi-fsl-lpspi.c
+++ b/drivers/spi/spi-fsl-lpspi.c
@@ -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;
@@ -850,6 +851,9 @@ 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;
@@ -859,6 +863,7 @@ 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;
--
2.25.1
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