From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755614AbbLEAqd (ORCPT ); Fri, 4 Dec 2015 19:46:33 -0500 Received: from mail-pa0-f48.google.com ([209.85.220.48]:35993 "EHLO mail-pa0-f48.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752181AbbLEAqb convert rfc822-to-8bit (ORCPT ); Fri, 4 Dec 2015 19:46:31 -0500 Date: Fri, 04 Dec 2015 16:46:28 -0800 From: Michael Turquette To: =?UTF-8?B?SGVpa28gU3TDvGJuZXI=?= , Michael Turquette 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 Message-ID: <566233e4cd23_40ed3ff1bbbdd3044@quark.notmuch> In-Reply-To: <2729647.3T7P7ViWpB@diego> References: <1438974570-20812-1-git-send-email-mturquette@baylibre.com> <2729647.3T7P7ViWpB@diego> Subject: Re: [PATCH RFC RFT 0/3] clk: detect per-user enable imbalances and implement hand-off Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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. Regards, Mike > > > Thanks > Heiko