From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753309AbbBXRed (ORCPT ); Tue, 24 Feb 2015 12:34:33 -0500 Received: from mail-wg0-f45.google.com ([74.125.82.45]:42283 "EHLO mail-wg0-f45.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752711AbbBXRea (ORCPT ); Tue, 24 Feb 2015 12:34:30 -0500 From: Lee Jones To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Cc: lee.jones@linaro.org, kernel@stlinux.com, mturquette@linaro.org, sboyd@codeaurora.org, devicetree@vger.kernel.org Subject: [PATCH v3 0/4] clk: st: New always-on clock domain Date: Tue, 24 Feb 2015 17:33:38 +0000 Message-Id: <1424799222-9301-1-git-send-email-lee.jones@linaro.org> X-Mailer: git-send-email 1.9.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org v2 => v3: - Ensure DT actually reflects h/w - i.e. Nodes should not contain a mishmash of different IP blocks, but should identify related h/w. In the current example we use interconnects - Change naming from clkdomain to clk-always-on - Place "do not abuse" warning in documentation v1 => v2: - Turned the ST specific driver into a generic one Hardware can have a bunch of clocks which must not be turned off. If drivers a) fail to obtain a reference to any of these or b) give up a previously obtained reference during suspend, the common clk framework will attempt to turn them off and the hardware will subsequently die. The only way to recover from this failure is to restart. To avoid either of these two scenarios from catastrophically disabling the running system we have implemented a clock domain where clocks are consumed and references are taken, thus preventing them from being shut down by the framework. *** BLURB HERE *** Lee Jones (4): ARM: sti: stih407-family: Supply defines for CLOCKGEN A0 ARM: sti: stih407-family: Add platform interconnects to always-on clk domain clk: Provide an always-on clock domain framework clk: dt: Introduce always-on clock domain documentation .../devicetree/bindings/clock/clk-always-on.txt | 35 ++++++++++++ arch/arm/boot/dts/stih407-family.dtsi | 15 ++++++ drivers/clk/Makefile | 1 + drivers/clk/clk-always-on.c | 62 ++++++++++++++++++++++ include/dt-bindings/clock/stih407-clks.h | 4 ++ 5 files changed, 117 insertions(+) create mode 100644 Documentation/devicetree/bindings/clock/clk-always-on.txt create mode 100644 drivers/clk/clk-always-on.c -- 1.9.1