sandbox: test: Add a second SPI slave on sandbox_spi bus
Place a second spi slave on the sandbox_spi bus, to be used by the spi_claim_bus() testcase we are about to introduce. We need to make sure that jumping between slaves calling spi_claim_bus() sets the bus speed and mode appropriately. Use different max-hz and mode properties for this new slave. Also, update sandbox_spi cs_info call to allow activity on CS0/CS1 and adapt dm_test_spi_find() testcase for this new setup. Signed-off-by:Ovidiu Panait <ovidiu.panait@windriver.com> Reviewed-by:
Simon Glass <sjg@chromium.org>
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