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spi: spi-mem: fallback to using transfers when CS gpios are used

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Devices with chip selects driven via GPIO are not compatible with the
spi-mem operations. Fallback to using standard spi transfers when the
device is connected with a gpio CS.

Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
Link: https://lore.kernel.org/r/20191107044235.4864-3-chris.packham@alliedtelesis.co.nz
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Chris Packham 2019-11-07 17:42:35 +13:00 committed by Mark Brown
parent 27fb2313f2
commit 05766050d5
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GPG Key ID: 24D68B725D5487D0
1 changed files with 1 additions and 1 deletions
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drivers/spi/spi-mem.c
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@ -286,7 +286,7 @@ int spi_mem_exec_op(struct spi_mem *mem, const struct spi_mem_op *op)
if (!spi_mem_internal_supports_op(mem, op))
return -ENOTSUPP;
if (ctlr->mem_ops) {
if (ctlr->mem_ops && !mem->spi->cs_gpiod) {
ret = spi_mem_access_start(mem);
if (ret)
return ret;