Certain clocks should not be turned of by clk_disable_unused. Until
now we have been using the kernel command-line of the same name to
prevent common clk from turning off all clocks without a reference,
as this would ensure hardware lockup. This patch lists each
platform interconnect which needs to stay on to prevent the
aforementioned issue from arising.
Signed-off-by: Lee Jones <lee.jones@xxxxxxxxxx>
---
arch/arm/boot/dts/stih407-family.dtsi | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/arch/arm/boot/dts/stih407-family.dtsi b/arch/arm/boot/dts/stih407-family.dtsi
index c06a546..35c74c6 100644
--- a/arch/arm/boot/dts/stih407-family.dtsi
+++ b/arch/arm/boot/dts/stih407-family.dtsi
@@ -34,6 +34,21 @@
reg = <0x08761000 0x1000>, <0x08760100 0x100>;
};
+ /*
+ * ICNs are not visible/controllable in Linux, but references to their
+ * clocks must be obtained and retained or the platform will become
+ * irrecoverably unresponsive.
+ */
+ icn {
+ compatible = "clk-always-on";
+ clocks = <&clk_s_c0_flexgen CLK_ICN_SBC>,
+ <&clk_s_c0_flexgen CLK_ICN_CPU>,
+ <&clk_s_c0_flexgen CLK_ICN_LMI>,
+ <&clk_s_c0_flexgen CLK_TX_ICN_DMU>,
+ <&clk_s_a0_flexgen CLK_IC_LMI0>,
+ <&clk_s_c0_flexgen CLK_EXT2F_A9>;
+ };
+
scu@08760000 {
compatible = "arm,cortex-a9-scu";
reg = <0x08760000 0x1000>;
--
1.9.1
--
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