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spi: stm32: qspi: Clamp stm32_qspi_get_mode() output to CCR_BUSWIDTH_4

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commit 63deee52811b2f84ed2da55ad47252f0e8145d62 upstream.

In case usage of OCTAL mode, buswidth parameter can take the value 8.
As return value of stm32_qspi_get_mode() is used to configure fields
of CCR registers that are 2 bits only (fields IMODE, ADMODE, ADSIZE,
 DMODE), clamp return value of stm32_qspi_get_mode() to 4.

Fixes: a557fca630cc ("spi: stm32_qspi: Add transfer_one_message() spi callback")
Cc: stable@vger.kernel.org
Signed-off-by: Patrice Chotard <patrice.chotard@foss.st.com>
Link: https://msgid.link/r/20240618132951.2743935-3-patrice.chotard@foss.st.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Patrice Chotard 2024-06-18 15:29:50 +02:00 committed by Greg Kroah-Hartman
parent 299c0cb3aa
commit 23b1940096
1 changed files with 1 additions and 1 deletions
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2
drivers/spi/spi-stm32-qspi.c
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@ -349,7 +349,7 @@ static int stm32_qspi_wait_poll_status(struct stm32_qspi *qspi)
static int stm32_qspi_get_mode(u8 buswidth)
{
if (buswidth == 4)
if (buswidth >= 4)
return CCR_BUSWIDTH_4;
return buswidth;