On Fri, Aug 25, 2017 at 1:50 AM, Stuart Longland <stuartl@xxxxxxxxxxxxxxxxxx> wrote: > [Note: dropping vadimp@xxxxxxxxxxxxx as SMTP server complained about the > DNS server returning NXDOMAIN. Apologies.] > On 25/08/17 18:32, Linus Walleij wrote: >> Gnah! >> Whoever writes a slot-in replacement making the character device >> take precendence wins lots of karma. > > What would such a replacement look like though? See Linus's comments about using the existing kernel GPIO chardev interface. It already supports requesting multiple GPIO line state changes in a single request. > > Some sort of system whereby you can read/write single-line commands as > if talking to a GPIO expander over a UART? > > Would you access the GPIOs one by one, or would you perhaps map them > into a bitmap (maybe arbitrarily, up to 64-bits wide) and perform masked > operations on the bitmap? > > I'm no fan of the sysfs GPIO interface, but it beats poking around at > registers behind the kernel's back. > -- > Stuart Longland (aka Redhatter, VK4MSL) > > I haven't lost my mind... > ...it's backed up on a tape somewhere. > -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
