20 Jul
2018
20 Jul
'18
12:34 p.m.
On Fri, Jul 20, 2018 at 02:13:28PM +0200, Greg Kroah-Hartman wrote:
The bcm63xx SPI controller does not allow manual control of the CS lines and will toggle it automatically before and after sending data, so we are limited to messages that fit in the FIFO buffer. Since the CS lines aren't available as GPIOs either, we will need to make slave drivers aware of this limitation so they can handle them accordingly.
Same review comment as before: this will ask other code (which presumably never worked?) to change how they use the hardware in order to cope with the limiations which seems a bit risky to me given that limits like this are fairly rare so that code isn't super well exercised in general.