ARM: Kirkwood: Ensure runit clock always ticks.

Marvell engineers tell us:

	It seems that many units use the RUNIT clock.
	SPI, UART, NAND, TWSI, ...
	So it's not possible to clock gate it.

Currently the SPI, NAND and TWSI driver will clk_prepaure_enable()
this clk, but since we have no idea what ... is, and turning this clk
off results in a hard lock, unconditionally enable runit.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Tested-by: Simon Baatz <gmbnomis@gmail.com>

1 files changed, 5 insertions, 0 deletions

diff --git a/arch/arm/mach-kirkwood/common.c b/arch/arm/mach-kirkwood/common.c
index f261cd242643..3de2d6df58e1 100644
--- a/arch/arm/mach-kirkwood/common.c
+++ b/arch/arm/mach-kirkwood/common.c
@@ -241,6 +241,11 @@ void __init kirkwood_clk_init(void)
         orion_clkdev_add("0", "pcie", pex0);
         orion_clkdev_add("1", "pcie", pex1);
         orion_clkdev_add(NULL, "kirkwood-i2s", audio);
+
+        /* Marvell says runit is used by SPI, UART, NAND, TWSI, ...,
+         * so should never be gated.
+         */
+        clk_prepare_enable(runit);
 }
 
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