[PATCH] ARM: Kirkwood: Fix crash when neither NAND nor SPI

Andrew Lunn andrew at lunn.ch
Fri Jun 8 10:09:42 EDT 2012

Both NAND and SPI make use of the RUNIT clk. However, if neither NAND
nor SPI is used in the system, RUNIT clock gets turned off, and the
SoC hard locks. It appears something else in the SoC, which is not
documented, is also using RUNIT. So prepare and enable RUNIT clock in

Signed-off-by: Andrew Lunn <andrew at lunn.ch>
 arch/arm/mach-kirkwood/common.c |    4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/arm/mach-kirkwood/common.c b/arch/arm/mach-kirkwood/common.c
index 25fb3fd..97f7d36 100644
--- a/arch/arm/mach-kirkwood/common.c
+++ b/arch/arm/mach-kirkwood/common.c
@@ -238,6 +238,10 @@ 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);
+	/* Something other than SPI and NAND needs runit, so make sure
+	   it never gets turned off. */
+	clk_prepare_enable(runit);

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