linux-kernel - [PATCH 03/22] clk: sunxi: add "pll6" to sun6i protected clock list

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Date:	Fri, 23 May 2014 15:51:06 +0800
From:	Chen-Yu Tsai <wens@...e.org>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	Lee Jones <lee.jones@...aro.org>,
	Maxime Ripard <maxime.ripard@...e-electrons.com>,
	Rob Herring <robh+dt@...nel.org>,
	Mike Turquette <mturquette@...aro.org>,
	Emilio Lopez <emilio@...pez.com.ar>,
	Linus Walleij <linus.walleij@...aro.org>
Cc:	Chen-Yu Tsai <wens@...e.org>, linux-serial@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org, Hans de Goede <hdegoede@...hat.com>,
	Boris BREZILLON <boris.brezillon@...e-electrons.com>,
	Luc Verhaegen <libv@...net.be>
Subject: [PATCH 03/22] clk: sunxi: add "pll6" to sun6i protected clock list

PLL6 is used by some important but undocumented module, most likely
memory related, such as mbus or the actual memory controller. As we
do not have a driver for that, add pll6 to the list of protected
clocks, so that it won't be disabled and leave us with a non-responsive
system.

Signed-off-by: Chen-Yu Tsai <wens@...e.org>
---
 drivers/clk/sunxi/clk-sunxi.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/clk/sunxi/clk-sunxi.c b/drivers/clk/sunxi/clk-sunxi.c
index e0e24d5..3e33bc1 100644
--- a/drivers/clk/sunxi/clk-sunxi.c
+++ b/drivers/clk/sunxi/clk-sunxi.c
@@ -1229,6 +1229,7 @@ CLK_OF_DECLARE(sun7i_a20_clk_init, "allwinner,sun7i-a20", sun5i_init_clocks);
 
 static const char *sun6i_critical_clocks[] __initdata = {
 	"cpu",
+	"pll6", /* something we don't know about uses pll6 */
 	"ahb1_sdram",
 };
 
-- 
2.0.0.rc2

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