[email protected], [email protected] Bcc: Subject: Re: [PATCH 1/2] spi: spidev: introduce SPI_IOC_WR_DEFAULT_MAX_SPEED_HZ command Reply-To: In-Reply-To: <[email protected]>
On Sun, May 14, 2017 at 06:27:16PM +0900, Mark Brown wrote: > On Tue, May 09, 2017 at 02:24:00PM +0200, Seraphime Kirkovski wrote: > > > I think, this change is necessary, on the one hand, because there are still > > a lot of longterm[2] supported kernels out there, whose users may be > > relying on > > SPI_IOC_WR_MAX_SPEED being system-wide and, on the other hand, this > > same command has been exhibiting a different behaviour for 3 years now, > > so its users may break, if 9169051617df7 is reverted in one way or > > another. > > Do we have any evidence that such users exist? I can't guarantee for other such users, but this change did disturb our workflow. We were using this feature to prototype and test hardware/firmware at different speeds. I was thinking this morning that maybe a sysfs interface will be better for setting global settings. Do you prefer ?
