[U-Boot] [PATCH] dm: spi: prevent setting a speed of 0 Hz

[Jagan Teki]

On Thu, Jan 18, 2018 at 1:45 PM, Simon Goldschmidt
<sgoldschmidt at de.pepperl-fuchs.com> wrote:
> When the device tree is missing a correct spi slave description below
> the bus, the 'set_speed' callback can be called with 'speed' == 0 Hz.
> At least with cadence qspi, this leads to a division by zero.
>
> Prevent this by initializing speed to 100 kHz in this case, as is
> done in 'dm_spi_claim_bus'.

Better go-with default baudrate if speed == 0 this what usually does
in remaining drivers.