From mboxrd@z Thu Jan 1 00:00:00 1970 From: Rob Herring Date: Fri, 5 Mar 2021 17:09:40 -0600 Subject: [PATCH 17/19] dt-bindings: ipmi: Add optional SerIRQ property to ASPEED KCS devices In-Reply-To: <20210219142523.3464540-18-andrew@aj.id.au> References: <20210219142523.3464540-1-andrew@aj.id.au> <20210219142523.3464540-18-andrew@aj.id.au> Message-ID: <20210305230940.GA809870@robh.at.kernel.org> List-Id: To: linux-aspeed@lists.ozlabs.org MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit On Sat, Feb 20, 2021 at 12:55:21AM +1030, Andrew Jeffery wrote: > Allocating IO and IRQ resources to LPC devices is in-theory an operation > for the host, however ASPEED don't appear to expose this capability > outside the BMC (e.g. SuperIO). Instead, we are left with BMC-internal > registers for managing these resources, so introduce a devicetree > property for KCS devices to describe SerIRQ properties. > > Signed-off-by: Andrew Jeffery > --- > .../bindings/ipmi/aspeed,ast2400-kcs-bmc.yaml | 14 ++++++++++++++ > 1 file changed, 14 insertions(+) > > diff --git a/Documentation/devicetree/bindings/ipmi/aspeed,ast2400-kcs-bmc.yaml b/Documentation/devicetree/bindings/ipmi/aspeed,ast2400-kcs-bmc.yaml > index 1c1cc4265948..808475a2c2ca 100644 > --- a/Documentation/devicetree/bindings/ipmi/aspeed,ast2400-kcs-bmc.yaml > +++ b/Documentation/devicetree/bindings/ipmi/aspeed,ast2400-kcs-bmc.yaml > @@ -47,6 +47,18 @@ properties: > channels the status address is derived from the data address, but the > status address may be optionally provided. > > + aspeed,lpc-interrupts: > + $ref: "/schemas/types.yaml#/definitions/uint32-matrix" > + minItems: 1 > + maxItems: 1 > + description: | > + A 2-cell property expressing the LPC SerIRQ number and the interrupt > + level/sense encoding (specified in the standard fashion). That would be uint32-array with 'maxItems: 2'. > + > + Note that the generated interrupt is issued from the BMC to the host, and > + thus the target interrupt controller is not captured by the BMC's > + devicetree. > + > kcs_chan: > deprecated: true > $ref: '/schemas/types.yaml#/definitions/uint32' > @@ -84,9 +96,11 @@ allOf: > > examples: > - | > + #include > kcs3: kcs at 24 { > compatible = "aspeed,ast2600-kcs-bmc"; > reg = <0x24 0x1>, <0x30 0x1>, <0x3c 0x1>; > aspeed,lpc-io-reg = <0xca2>; > + aspeed,lpc-interrupts = <11 IRQ_TYPE_LEVEL_LOW>; > interrupts = <8>; > }; > -- > 2.27.0 >