spi: sg2044-nor: Honor SPI clock limits

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The fixed divider ignores device and operation clock limits. Calculate
the divider before each transfer so SCK does not exceed either limit.

Advertise the controller maximum speed so the SPI core supplies a default
when the device omits its maximum speed. Use the fastest divider when no
speed limit is supplied.

Fixes: de16c322ee ("spi: sophgo: add SG2044 SPI NOR controller driver")
Signed-off-by: Han Gao <gaohan@iscas.ac.cn>
Link: https://patch.msgid.link/20261001-fix-sg204xspi-v2-2-014dbaf22b5e@iscas.ac.cn
Signed-off-by: Mark Brown <broonie@kernel.org>

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Han Gao 2026-10-01 02:22:51 +08:00 • committed by Mark Brown

parent e130c54fbb

commit 61d44a2c07

1 changed files with 39 additions and 0 deletions

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drivers/spi/spi-sg2044-nor.c

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