From: jae.hyun.yoo@intel.com To: Rob Herring <robh+dt@kernel.org>, Corey Minyard <minyard@acm.org>, Joel Stanley <joel@jms.id.au>, Andrew Jeffery <andrew@aj.id.au>, Cedric Le Goater <clg@kaod.org>, Haiyue Wang <haiyue.wang@linux.intel.com>, ChiaWei Wang <chiawei_wang@aspeedtech.com>, Jae Hyun Yoo <jae.hyun.yoo@linux.intel.com> Cc: devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-aspeed@lists.ozlabs.org, openipmi-developer@lists.sourceforge.net Subject: [PATCH v3 2/6] dt-bindings: ipmi: bt-bmc: add 'clocks' as a required property Date: Mon, 8 Nov 2021 11:01:56 -0800 [thread overview] Message-ID: <20211108190200.290957-3-jae.hyun.yoo@intel.com> (raw) In-Reply-To: <20211108190200.290957-1-jae.hyun.yoo@intel.com> From: Jae Hyun Yoo <jae.hyun.yoo@linux.intel.com> If LPC BT driver is registered ahead of lpc-ctrl module, LPC BT 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 as one of required properties to enable the LCLK by the LPC IBT driver. Note: dtsi change in this patch series should be applied along with, and dtbs should be re-compiled after applying this series 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> --- v2 -> v3: * Made commit message more descriptive. v1 -> v2: * Added 'clocks' property into ibt bindings using 'aspeed,ast2400-ibt-bmc.txt' because it's not merged into 'aspeed-lpc.yaml' yet. The bindings merging could be done using a separate patch later. .../devicetree/bindings/ipmi/aspeed,ast2400-ibt-bmc.txt | 2 ++ 1 file changed, 2 insertions(+) diff --git a/Documentation/devicetree/bindings/ipmi/aspeed,ast2400-ibt-bmc.txt b/Documentation/devicetree/bindings/ipmi/aspeed,ast2400-ibt-bmc.txt index c9902fd4b38b..25f86da804b7 100644 --- a/Documentation/devicetree/bindings/ipmi/aspeed,ast2400-ibt-bmc.txt +++ b/Documentation/devicetree/bindings/ipmi/aspeed,ast2400-ibt-bmc.txt @@ -11,6 +11,7 @@ Required properties: "aspeed,ast2500-ibt-bmc" "aspeed,ast2600-ibt-bmc" - reg: physical address and size of the registers +- clocks: clock for the device Optional properties: @@ -23,4 +24,5 @@ Example: compatible = "aspeed,ast2400-ibt-bmc"; reg = <0x1e789140 0x18>; interrupts = <8>; + clocks = <&syscon ASPEED_CLK_GATE_LCLK>; }; -- 2.25.1
WARNING: multiple messages have this Message-ID (diff)
From: jae.hyun.yoo@intel.com To: Rob Herring <robh+dt@kernel.org>, Corey Minyard <minyard@acm.org>, Joel Stanley <joel@jms.id.au>, Andrew Jeffery <andrew@aj.id.au>, Cedric Le Goater <clg@kaod.org>, Haiyue Wang <haiyue.wang@linux.intel.com>, ChiaWei Wang <chiawei_wang@aspeedtech.com>, Jae Hyun Yoo <jae.hyun.yoo@linux.intel.com> Cc: devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-aspeed@lists.ozlabs.org, openipmi-developer@lists.sourceforge.net Subject: [PATCH v3 2/6] dt-bindings: ipmi: bt-bmc: add 'clocks' as a required property Date: Mon, 8 Nov 2021 11:01:56 -0800 [thread overview] Message-ID: <20211108190200.290957-3-jae.hyun.yoo@intel.com> (raw) In-Reply-To: <20211108190200.290957-1-jae.hyun.yoo@intel.com> From: Jae Hyun Yoo <jae.hyun.yoo@linux.intel.com> If LPC BT driver is registered ahead of lpc-ctrl module, LPC BT 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 as one of required properties to enable the LCLK by the LPC IBT driver. Note: dtsi change in this patch series should be applied along with, and dtbs should be re-compiled after applying this series 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> --- v2 -> v3: * Made commit message more descriptive. v1 -> v2: * Added 'clocks' property into ibt bindings using 'aspeed,ast2400-ibt-bmc.txt' because it's not merged into 'aspeed-lpc.yaml' yet. The bindings merging could be done using a separate patch later. .../devicetree/bindings/ipmi/aspeed,ast2400-ibt-bmc.txt | 2 ++ 1 file changed, 2 insertions(+) diff --git a/Documentation/devicetree/bindings/ipmi/aspeed,ast2400-ibt-bmc.txt b/Documentation/devicetree/bindings/ipmi/aspeed,ast2400-ibt-bmc.txt index c9902fd4b38b..25f86da804b7 100644 --- a/Documentation/devicetree/bindings/ipmi/aspeed,ast2400-ibt-bmc.txt +++ b/Documentation/devicetree/bindings/ipmi/aspeed,ast2400-ibt-bmc.txt @@ -11,6 +11,7 @@ Required properties: "aspeed,ast2500-ibt-bmc" "aspeed,ast2600-ibt-bmc" - reg: physical address and size of the registers +- clocks: clock for the device Optional properties: @@ -23,4 +24,5 @@ Example: compatible = "aspeed,ast2400-ibt-bmc"; reg = <0x1e789140 0x18>; interrupts = <8>; + clocks = <&syscon ASPEED_CLK_GATE_LCLK>; }; -- 2.25.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2021-11-08 18:42 UTC|newest] Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-11-08 19:01 [PATCH v3 0/6] Add LCLK control into Aspeed LPC sub drivers jae.hyun.yoo 2021-11-08 19:01 ` jae.hyun.yoo 2021-11-08 19:01 ` [PATCH v3 1/6] ARM: dts: aspeed: add LCLK setting into LPC IBT node jae.hyun.yoo 2021-11-08 19:01 ` jae.hyun.yoo 2021-11-08 19:01 ` jae.hyun.yoo [this message] 2021-11-08 19:01 ` [PATCH v3 2/6] dt-bindings: ipmi: bt-bmc: add 'clocks' as a required property jae.hyun.yoo 2021-11-19 1:07 ` Rob Herring 2021-11-19 1:07 ` Rob Herring 2021-11-08 19:01 ` [PATCH v3 3/6] ipmi: bt: add clock control logic jae.hyun.yoo 2021-11-08 19:01 ` jae.hyun.yoo 2021-11-08 19:01 ` [PATCH v3 4/6] ARM: dts: aspeed: add LCLK setting into LPC KCS nodes jae.hyun.yoo 2021-11-08 19:01 ` jae.hyun.yoo 2021-11-08 19:01 ` [PATCH v3 5/6] dt-bindings: ipmi: aspeed,kcs-bmc: add 'clocks' as a required property jae.hyun.yoo 2021-11-08 19:01 ` [PATCH v3 5/6] dt-bindings: ipmi: aspeed, kcs-bmc: " jae.hyun.yoo 2021-11-19 1:08 ` [PATCH v3 5/6] dt-bindings: ipmi: aspeed,kcs-bmc: " Rob Herring 2021-11-19 1:08 ` Rob Herring 2021-11-08 19:02 ` [PATCH v3 6/6] ipmi: kcs_bmc_aspeed: add clock control logic jae.hyun.yoo 2021-11-08 19:02 ` jae.hyun.yoo
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