linux-kernel - [PATCH 3.12 160/175] clk: zynq: Force CPU

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Message-Id: <9a0fb408e3294a4a9e058567f21163c024f67269.1426581621.git.jslaby@suse.cz>
Date:	Tue, 17 Mar 2015 09:42:18 +0100
From:	Jiri Slaby <jslaby@...e.cz>
To:	stable@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org,
	Soren Brinkmann <soren.brinkmann@...inx.com>,
	Michael Turquette <mturquette@...aro.org>,
	Jiri Slaby <jslaby@...e.cz>
Subject: [PATCH 3.12 160/175] clk: zynq: Force CPU_2X clock to be ungated

From: Soren Brinkmann <soren.brinkmann@...inx.com>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

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@...inx.com>
Signed-off-by: Michael Turquette <mturquette@...aro.org>
Signed-off-by: Jiri Slaby <jslaby@...e.cz>
---
 drivers/clk/zynq/clkc.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/clk/zynq/clkc.c b/drivers/clk/zynq/clkc.c
index cc40fe64f2dc..01eb95cd549e 100644
--- a/drivers/clk/zynq/clkc.c
+++ b/drivers/clk/zynq/clkc.c
@@ -276,6 +276,7 @@ static void __init zynq_clk_setup(struct device_node *np)
 	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);
-- 
2.3.0

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