RFC: representing sdio devices oob interrupt, clks, etc. in device tree
From: broonie@kernel.org (Mark Brown)
Date: 2014-05-27 15:47:48
Also in:
linux-devicetree, linux-mmc
On Mon, May 26, 2014 at 07:55:47PM +0200, Hans de Goede wrote:
power-on-seq = "gpio_reg_enable", "usleep 1000", "clk_32khz", "usleep 200";
...
Where power-on-seq would tell the mmc-core exactly how to bring up the sdio device, using standard prefixes so that the mmc-core knows that something is a clock / gpio / reset / whatever.
There was some work on such generic power on sequences in DT from Alexandre Courbot a while ago, search for "Runtime Interpreter Power Sequences". It ground to a halt IIRC mainly because it was never clear that this should ever be encoded outside of the driver for a device but the binding was pretty good and well reviewed, it's a good place to start if there's a desire to do things like this. -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 836 bytes Desc: Digital signature URL: <http://lists.infradead.org/pipermail/linux-arm-kernel/attachments/20140527/b99e7b44/attachment.sig>