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spi: imx: Don't expect DMA for i.MX{25,35,50,51,53} cspi devices

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[ Upstream commit ce1dac560a ]

While in commit 2dd33f9cec ("spi: imx: support DMA for imx35") it was
claimed that DMA works on i.MX25, i.MX31 and i.MX35 the respective
device trees don't add DMA channels. The Reference manuals of i.MX31 and
i.MX25 also don't mention the CSPI core being DMA capable. (I didn't
check the others.)

Since commit e267a5b3ec ("spi: spi-imx: Use dev_err_probe for failed
DMA channel requests") this results in an error message

	spi_imx 43fa4000.spi: error -ENODEV: can't get the TX DMA channel!

during boot. However that isn't fatal and the driver gets loaded just
fine, just without using DMA.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Link: https://patch.msgid.link/20240508095610.2146640-2-u.kleine-koenig@pengutronix.de
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Uwe Kleine-König 2024-05-08 11:56:10 +02:00 committed by Greg Kroah-Hartman
parent 55f6da7051
commit bd3ca9bb56
1 changed files with 1 additions and 1 deletions
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2
drivers/spi/spi-imx.c
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@ -1050,7 +1050,7 @@ static struct spi_imx_devtype_data imx35_cspi_devtype_data = {
.rx_available = mx31_rx_available, .rx_available = mx31_rx_available,
.reset = mx31_reset, .reset = mx31_reset,
.fifo_size = 8, .fifo_size = 8,
.has_dmamode = true, .has_dmamode = false,
.dynamic_burst = false, .dynamic_burst = false,
.has_targetmode = false, .has_targetmode = false,
.devtype = IMX35_CSPI, .devtype = IMX35_CSPI,