ARM: dts: aspeed: add LCLK setting into LPC KCS nodes

If LPC KCS driver is registered ahead of lpc-ctrl module, LPC KCS
hardware block will be enabled without heart beating of LCLK until
lpc-ctrl enables the LCLK. This issue causes improper handling on
host interrupts when the host sends interrupts in that time frame.
Then kernel eventually forcibly disables the interrupt with
dumping stack and printing a 'nobody cared this irq' message out.

To prevent this issue, all LPC sub drivers should enable LCLK
individually so this patch adds 'clocks' property setting into LPC
KCS node as one of required properties to enable the LCLK by the
LPC KCS driver.

Note: dtbs should be re-compiled after applying this change since
it's adding a new required property otherwise the driver will not
be probed correctly.

Signed-off-by: Jae Hyun Yoo <jae.hyun.yoo@linux.intel.com>
Reviewed-by: Joel Stanley <joel@jms.id.au>
Reviewed-by: Andrew Jeffery <andrew@aj.id.au>
Link: https://lore.kernel.org/r/20211108190200.290957-5-jae.hyun.yoo@intel.com
Signed-off-by: Joel Stanley <joel@jms.id.au>

diff --git a/arch/arm/boot/dts/aspeed-g5.dtsi b/arch/arm/boot/dts/aspeed-g5.dtsi
index d0cc4be2de59fd403bf5ee49fda8b4cbc637dc31..7495f93c5069f3e20a1a07b2ef0555c840b5db8f 100644 (file)
--- a/arch/arm/boot/dts/aspeed-g5.dtsi
+++ b/arch/arm/boot/dts/aspeed-g5.dtsi
@@ -446,6 +446,7 @@
                                        compatible = "aspeed,ast2500-kcs-bmc-v2";
                                        reg = <0x24 0x1>, <0x30 0x1>, <0x3c 0x1>;
                                        interrupts = <8>;
+                                       clocks = <&syscon ASPEED_CLK_GATE_LCLK>;
                                        status = "disabled";
                                };
 
@@ -453,6 +454,7 @@
                                        compatible = "aspeed,ast2500-kcs-bmc-v2";
                                        reg = <0x28 0x1>, <0x34 0x1>, <0x40 0x1>;
                                        interrupts = <8>;
+                                       clocks = <&syscon ASPEED_CLK_GATE_LCLK>;
                                        status = "disabled";
                                };
 
@@ -460,6 +462,7 @@
                                        compatible = "aspeed,ast2500-kcs-bmc-v2";
                                        reg = <0x2c 0x1>, <0x38 0x1>, <0x44 0x1>;
                                        interrupts = <8>;
+                                       clocks = <&syscon ASPEED_CLK_GATE_LCLK>;
                                        status = "disabled";
                                };
 
@@ -467,6 +470,7 @@
                                        compatible = "aspeed,ast2500-kcs-bmc-v2";
                                        reg = <0x114 0x1>, <0x118 0x1>, <0x11c 0x1>;
                                        interrupts = <8>;
+                                       clocks = <&syscon ASPEED_CLK_GATE_LCLK>;
                                        status = "disabled";
                                };
 

diff --git a/arch/arm/boot/dts/aspeed-g6.dtsi b/arch/arm/boot/dts/aspeed-g6.dtsi
index 539edbd7aaeefc293b8b84e698e51c26d708d00b..c32e87fad4dc90be4bc2d916e4c6c495ee857664 100644 (file)
--- a/arch/arm/boot/dts/aspeed-g6.dtsi
+++ b/arch/arm/boot/dts/aspeed-g6.dtsi
@@ -525,6 +525,7 @@
                                        compatible = "aspeed,ast2500-kcs-bmc-v2";
                                        reg = <0x24 0x1>, <0x30 0x1>, <0x3c 0x1>;
                                        interrupts = <GIC_SPI 138 IRQ_TYPE_LEVEL_HIGH>;
+                                       clocks = <&syscon ASPEED_CLK_GATE_LCLK>;
                                        kcs_chan = <1>;
                                        status = "disabled";
                                };
@@ -533,6 +534,7 @@
                                        compatible = "aspeed,ast2500-kcs-bmc-v2";
                                        reg = <0x28 0x1>, <0x34 0x1>, <0x40 0x1>;
                                        interrupts = <GIC_SPI 139 IRQ_TYPE_LEVEL_HIGH>;
+                                       clocks = <&syscon ASPEED_CLK_GATE_LCLK>;
                                        status = "disabled";
                                };
 
@@ -540,6 +542,7 @@
                                        compatible = "aspeed,ast2500-kcs-bmc-v2";
                                        reg = <0x2c 0x1>, <0x38 0x1>, <0x44 0x1>;
                                        interrupts = <GIC_SPI 140 IRQ_TYPE_LEVEL_HIGH>;
+                                       clocks = <&syscon ASPEED_CLK_GATE_LCLK>;
                                        status = "disabled";
                                };
 
@@ -547,6 +550,7 @@
                                        compatible = "aspeed,ast2500-kcs-bmc-v2";
                                        reg = <0x114 0x1>, <0x118 0x1>, <0x11c 0x1>;
                                        interrupts = <GIC_SPI 141 IRQ_TYPE_LEVEL_HIGH>;
+                                       clocks = <&syscon ASPEED_CLK_GATE_LCLK>;
                                        status = "disabled";
                                };