From 1e435256d625c203660f0105f1155cd2af283051 Mon Sep 17 00:00:00 2001 From: Olof Johansson Date: Sat, 27 Apr 2013 14:10:18 -0700 Subject: clk: add clk_ignore_unused option to keep boot clocks on This is primarily useful when there's a driver that doesn't claim clocks properly, but the bootloader leaves them on. It's not expected to be used in normal cases, but for bringup and debug it's very useful to have the option to not gate unclaimed clocks that are still on. Signed-off-by: Olof Johansson Signed-off-by: Mike Turquette [mturquette@linaro.org: fixed up trivial merge issue] --- Documentation/clk.txt | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'Documentation/clk.txt') diff --git a/Documentation/clk.txt b/Documentation/clk.txt index 4274a54..b9911c2 100644 --- a/Documentation/clk.txt +++ b/Documentation/clk.txt @@ -231,3 +231,14 @@ To better enforce this policy, always follow this simple rule: any statically initialized clock data MUST be defined in a separate file from the logic that implements its ops. Basically separate the logic from the data and all is well. + + Part 6 - Disabling clock gating of unused clocks + +Sometimes during development it can be useful to be able to bypass the +default disabling of unused clocks. For example, if drivers aren't enabling +clocks properly but rely on them being on from the bootloader, bypassing +the disabling means that the driver will remain functional while the issues +are sorted out. + +To bypass this disabling, include "clk_ignore_unused" in the bootargs to the +kernel. -- cgit v1.1