[PATCH v5 2/4] ARM: sti: stih410-clocks: Identify critical clocks as always-on

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 




Lots of platforms contain clocks which if turned off would prove fatal.
The only way to recover is to restart the board(s).  This driver takes
references to clocks which are required to be always-on.  The common
clk framework will then take references to them.  This way they will
not be turned off during the clk_disabled_unused() procedure.

In this patch we are identifying clocks, which if gated would render
the STiH410 development board unserviceable.

Signed-off-by: Lee Jones <lee.jones@xxxxxxxxxx>
---
 arch/arm/boot/dts/stih410-clock.dtsi | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/arch/arm/boot/dts/stih410-clock.dtsi b/arch/arm/boot/dts/stih410-clock.dtsi
index 6b5803a..e1dd9b2 100644
--- a/arch/arm/boot/dts/stih410-clock.dtsi
+++ b/arch/arm/boot/dts/stih410-clock.dtsi
@@ -103,6 +103,7 @@
 				clocks = <&clk_sysin>;
 
 				clock-output-names = "clk-s-a0-pll-ofd-0";
+				clock-always-on = <0>; /* clk-s-a0-pll-ofd-0 */
 			};
 
 			clk_s_a0_flexgen: clk-s-a0-flexgen {
@@ -115,6 +116,8 @@
 
 				clock-output-names = "clk-ic-lmi0",
 						     "clk-ic-lmi1";
+
+				clock-always-on = <CLK_IC_LMI0>;
 			};
 		};
 
@@ -142,6 +145,7 @@
 				clocks = <&clk_sysin>;
 
 				clock-output-names = "clk-s-c0-pll0-odf-0";
+				clock-always-on = <0>; /* clk-s-c0-pll0-odf-0 */
 			};
 
 			clk_s_c0_pll1: clk-s-c0-pll1 {
@@ -204,6 +208,12 @@
 						     "clk-clust-hades",
 						     "clk-hwpe-hades",
 						     "clk-fc-hades";
+
+				clock-always-on = <CLK_ICN_CPU>,
+						  <CLK_TX_ICN_DMU>,
+						  <CLK_EXT2F_A9>,
+						  <CLK_ICN_LMI>,
+						  <CLK_ICN_SBC>;
 			};
 		};
 
-- 
1.9.1

--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html




[Index of Archives]     [Device Tree Compilter]     [Device Tree Spec]     [Linux Driver Backports]     [Video for Linux]     [Linux USB Devel]     [Linux PCI Devel]     [Linux Audio Users]     [Linux Kernel]     [Linux SCSI]     [XFree86]     [Yosemite Backpacking]
  Powered by Linux