[PATCH v5 2/6] power: add power sequence library
From: mka@chromium.org (Matthias Kaehlcke)
Date: 2016-08-09 00:25:06
Also in:
linux-devicetree, linux-pm, lkml
El Mon, Aug 08, 2016 at 04:52:07PM +0800 Peter Chen ha dit:
We have an well-known problem that the device needs to do some power sequence before it can be recognized by related host, the typical example like hard-wired mmc devices and usb devices. This power sequence is hard to be described at device tree and handled by related host driver, so we have created a common power sequence library to cover this requirement. The core code has supplied some common helpers for host driver, and individual power sequence libraries handle kinds of power sequence for devices. pwrseq_generic is intended for general purpose of power sequence, which handles gpios and clocks currently, and can cover regulator and pinctrl in future. The host driver calls pwrseq_alloc_generic to create an generic pwrseq instance. Signed-off-by: Peter Chen <redacted> Tested-by Joshua Clayton [off-list ref]
Reviewed-by: Matthias Kaehlcke <mka@chromium.org> Tested-by: Matthias Kaehlcke <mka@chromium.org>