On Wed, Mar 04, 2026 at 01:00:13AM +0800, Ng, Boon Khai wrote: > Hi Conor, Tom, > > > > Why would this be inappropraite for the Linux kernel, once the system is > > > fully supported in Linux is the first question to answer. Thanks. > > As Conor mentioned, the bits_per_word setting is obtained from the > controller and validated at runtime. > > Additionally, bits_per_word can also be sourced from ACPI, as shown in the > Linux SPI driver code > > https://github.com/torvalds/linux/blob/af4e9ef3d78420feb8fe58cd9a1ab80c501b3c08/drivers/spi/spi.c#L2739C7-L2739C20 > > > in its spi_device struct. I don't know if u-boot has similar > > functionality in its code, but looking at dm_spi_slave_plat which I > > think is your version of spi_device, that information is not there. > > > Currently, U-Boot only supports an hardcoded 8-bit bits_per_word > configuration.
Thanks. And can we reasonably follow what Linux does here instead? -- Tom
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