From mboxrd@z Thu Jan 1 00:00:00 1970 From: mka@chromium.org (Matthias Kaehlcke) Date: Mon, 8 Aug 2016 17:25:01 -0700 Subject: [PATCH v5 2/6] power: add power sequence library In-Reply-To: <1470646331-23227-3-git-send-email-peter.chen@nxp.com> References: <1470646331-23227-1-git-send-email-peter.chen@nxp.com> <1470646331-23227-3-git-send-email-peter.chen@nxp.com> Message-ID: <20160809002501.GA125064@google.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 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 > Tested-by Joshua Clayton Reviewed-by: Matthias Kaehlcke Tested-by: Matthias Kaehlcke