Am 26.02.2020 um 12:33 schrieb Mark Brown:
On Wed, Feb 26, 2020 at 08:36:37AM +0100, Herbrechtsmeier Dr.-Ing. , Stefan wrote:
I see two possible solutions.
a) The complexity is handled inside the client. The client uses the
controller exclusive and isn’t allowed to use the new panic transfer during
a normal transfer.
Then someone builds a system with two devices attached to a single SPI
controller... besides, you've got no mechanism for controlling when a
kernel might panic or power might be lost. I'm not sure a scheme that
relies on being able to control when stuff happens is going to be what
you need.
In my case this works because I read from the device during probe and
write to the device during a panic or after power failure. But I
understand that this isn't a generic solution.
