spi: aspeed: Force default address decoding range assignment for each CS

On some platforms, we cannot assume that the whole address decoding range
value is ready for each CS. Especially for chip selects other than CS0,
the address decoding range may not be properly configured before the kernel
stage, or the existing configuration may be unsuitable. This can lead to
SPI flash detection failures during driver probe.

To ensure reliable initialization, this patch forcibly assigns a default
address decoding range to each chip select based on a platform-specific
minimum window size. Unused chip selects are explicitly disabled to avoid
conflicts.

This change improves robustness across platforms with varying bootloader
behavior and ensures consistent SPI flash initialization.

Signed-off-by: Chin-Ting Kuo <chin-ting_kuo@aspeedtech.com>
Link: https://patch.msgid.link/20251001112605.1130723-4-chin-ting_kuo@aspeedtech.com
Signed-off-by: Mark Brown <broonie@kernel.org>

0 files changed, 0 insertions, 0 deletions