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| author | Alexander Stein <alexander.stein@ew.tq-group.com> | 2023-07-17 10:59:34 +0200 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2023-07-18 12:47:56 +0100 |
| commit | f46b06e62c86a688ebe691b004f3056818c8ed15 (patch) | |
| tree | fc96ce2d20ff865c024027434063736c23be9212 /drivers/spi/spi-fsl-lpspi.c | |
| parent | dfc07ee62c03eaaaf806fccc50bd52fcbc9f828f (diff) | |
| download | lwn-f46b06e62c86a688ebe691b004f3056818c8ed15.tar.gz lwn-f46b06e62c86a688ebe691b004f3056818c8ed15.zip | |
spi: spi-fsl-lpspi: Read chip-select amount from hardware for i.MX93
PARAM.PCSNUM register on i.MX93 indicates the number of supported
(hw) chip-selects. LPSPI4 has 3 while others have only 2.
Still allow overwriting from DT.
Signed-off-by: Alexander Stein <alexander.stein@ew.tq-group.com>
Link: https://lore.kernel.org/r/20230717085934.409476-3-alexander.stein@ew.tq-group.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi/spi-fsl-lpspi.c')
| -rw-r--r-- | drivers/spi/spi-fsl-lpspi.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/drivers/spi/spi-fsl-lpspi.c b/drivers/spi/spi-fsl-lpspi.c index f3b7bb1e52eb..e32e8cab5aa8 100644 --- a/drivers/spi/spi-fsl-lpspi.c +++ b/drivers/spi/spi-fsl-lpspi.c @@ -896,8 +896,12 @@ static int fsl_lpspi_probe(struct platform_device *pdev) fsl_lpspi->txfifosize = 1 << (temp & 0x0f); fsl_lpspi->rxfifosize = 1 << ((temp >> 8) & 0x0f); if (of_property_read_u32((&pdev->dev)->of_node, "num-cs", - &num_cs)) - num_cs = 1; + &num_cs)) { + if (of_device_is_compatible(pdev->dev.of_node, "fsl,imx93-spi")) + num_cs = ((temp >> 16) & 0xf); + else + num_cs = 1; + } controller->bits_per_word_mask = SPI_BPW_RANGE_MASK(8, 32); controller->transfer_one = fsl_lpspi_transfer_one; |