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[3/16] ARM: Kirkwood: Ensure runit clock always ticks.

Message ID 1342805751-18048-4-git-send-email-andrew@lunn.ch (mailing list archive)
State New, archived
Headers show

Commit Message

Andrew Lunn July 20, 2012, 5:35 p.m. UTC
Marvell engineers tell us:

	It seems that many units use the RUNIT clock.
	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>
 arch/arm/mach-kirkwood/common.c |    5 +++++
 1 file changed, 5 insertions(+)
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diff --git a/arch/arm/mach-kirkwood/common.c b/arch/arm/mach-kirkwood/common.c
index f261cd2..3de2d6d 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);