From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751597AbcBKVeB (ORCPT ); Thu, 11 Feb 2016 16:34:01 -0500 Received: from mail-pa0-f44.google.com ([209.85.220.44]:35078 "EHLO mail-pa0-f44.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751364AbcBKVd7 convert rfc822-to-8bit (ORCPT ); Thu, 11 Feb 2016 16:33:59 -0500 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8BIT To: =?utf-8?q?Heiko_St=C3=BCbner?= , Michael Turquette From: Michael Turquette In-Reply-To: <566233e4cd23_40ed3ff1bbbdd3044@quark.notmuch> Cc: linux-kernel@vger.kernel.org, linux-clk@vger.kernel.org, sboyd@codeaurora.org, lee.jones@linaro.org, maxime.ripard@free-electrons.com, s.hauer@pengutronix.de, geert@linux-m68k.org References: <1438974570-20812-1-git-send-email-mturquette@baylibre.com> <2729647.3T7P7ViWpB@diego> <566233e4cd23_40ed3ff1bbbdd3044@quark.notmuch> Message-ID: <20160211213356.26445.26458@quark.deferred.io> User-Agent: alot/0.3.6 Subject: Re: [PATCH RFC RFT 0/3] clk: detect per-user enable imbalances and implement hand-off Date: Thu, 11 Feb 2016 13:33:56 -0800 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Quoting Michael Turquette (2015-12-04 16:46:28) > Heiko Stübner wrote: > > Hi Mike, > > > > Am Freitag, 7. August 2015, 12:09:27 schrieb Michael Turquette: > > > This is an alternative solution to Lee's "clk: Provide support for > > > always-on clocks" series[0]. > > > > > > The first two patches introduce run-time checks to ensure that clock > > > consumer drivers are respecting the clk.h api. The former patch checks > > > for prepare and enable imbalances. The latter checks for calls to > > > clk_put without first disabling and unpreparing the clk. > > > > > > The third patch introduces a new flag, CLK_ENABLE_HAND_OFF, which > > > prepares and enables a clk at registration-time. The reference counts > > > (prepare & enable) are transferred to the first clock consumer driver > > > that clk_get's the clk with this flag set AND calls clk_prepare or > > > clk_enable. > > > > > > The net result is that a clock with this flag set will be enabled at > > > boot and neither the clk_disable_unused garbage collector or the > > > "sibling clock disables a shared parent" scenario will cause the flagged > > > clock to be disabled. The first driver to come along and explicitly > > > claim, prepare and enable this clock will inherit those reference > > > counts. No change to clock consumer drivers is required for this to > > > work. Please continue to use the clk.h api properly. > > > > just out of curiosity, did this move anywhere yet? (Last message from october > > 1st it seems) > > > > It looks like it is needed to fix the orphan-deferral I need on Rockchip that > > breaks sunxi in its current state. > > Yes, I'm preparing another version. Sorry for high latency, but I've been > traveling for more than 2 months non-stop. Done. See: http://lkml.kernel.org/r/<1455225554-13267-1-git-send-email-mturquette@baylibre.com> Regards, Mike > > Regards, > Mike > > > > > > > Thanks > > Heiko > >