This is a note to let you know that I've just added the patch titled
clk: zynq: Force CPU_2X clock to be ungated
to the 3.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
clk-zynq-force-cpu_2x-clock-to-be-ungated.patch
and it can be found in the queue-3.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 3dccfecdb867fe35b305a4e493ef5652b7d9d4cb Mon Sep 17 00:00:00 2001
From: Soren Brinkmann <soren.brinkmann@xxxxxxxxxx>
Date: Tue, 27 Jan 2015 11:05:27 -0800
Subject: clk: zynq: Force CPU_2X clock to be ungated
From: Soren Brinkmann <soren.brinkmann@xxxxxxxxxx>
commit 3dccfecdb867fe35b305a4e493ef5652b7d9d4cb upstream.
The CPU_2X clock does not have a classical in-kernel user, but is,
amongst other things, required for OCM and debug access. Make sure this
clock is not mistakenly disabled during boot up by enabling it in the
platform's clock driver.
Fixes: 0ee52b157b8e 'clk: zynq: Add clock controller driver'
Signed-off-by: Soren Brinkmann <soren.brinkmann@xxxxxxxxxx>
Signed-off-by: Michael Turquette <mturquette@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/clk/zynq/clkc.c | 1 +
1 file changed, 1 insertion(+)
--- a/drivers/clk/zynq/clkc.c
+++ b/drivers/clk/zynq/clkc.c
@@ -300,6 +300,7 @@ static void __init zynq_clk_setup(struct
clks[cpu_2x] = clk_register_gate(NULL, clk_output_name[cpu_2x],
"cpu_2x_div", CLK_IGNORE_UNUSED, SLCR_ARM_CLK_CTRL,
26, 0, &armclk_lock);
+ clk_prepare_enable(clks[cpu_2x]);
clk = clk_register_fixed_factor(NULL, "cpu_1x_div", "cpu_div", 0, 1,
4 + 2 * tmp);
Patches currently in stable-queue which might be from soren.brinkmann@xxxxxxxxxx are
queue-3.14/clk-zynq-force-cpu_2x-clock-to-be-ungated.patch
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