From mboxrd@z Thu Jan  1 00:00:00 1970
From: Mika Westerberg <mika.westerberg@linux.intel.com>
Subject: Re: [PATCH v9 5/7] ACPI: Translate the I/O range of non-MMIO devices
 before scanning
Date: Tue, 13 Jun 2017 18:10:13 +0300
Message-ID: <20170613151013.GT3187@lahna.fi.intel.com>
References: <1495712248-5232-1-git-send-email-gabriele.paoloni@huawei.com>
 <1495712248-5232-6-git-send-email-gabriele.paoloni@huawei.com>
 <20170530132408.GA2556@red-moon>
 <EE11001F9E5DDD47B7634E2F8A612F2E40A7B677@FRAEML521-MBX.china.huawei.com>
 <20170606085553.GA20085@red-moon>
 <20170612155700.GA31930@red-moon>
 <20170613084831.GP3187@lahna.fi.intel.com>
 <EE11001F9E5DDD47B7634E2F8A612F2E40AAE3DA@FRAEML521-MBX.china.huawei.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Return-path: <linux-acpi-owner@vger.kernel.org>
Received: from mga11.intel.com ([192.55.52.93]:30826 "EHLO mga11.intel.com"
        rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP
        id S1752456AbdFMPQy (ORCPT <rfc822;linux-acpi@vger.kernel.org>);
        Tue, 13 Jun 2017 11:16:54 -0400
Content-Disposition: inline
In-Reply-To: <EE11001F9E5DDD47B7634E2F8A612F2E40AAE3DA@FRAEML521-MBX.china.huawei.com>
Sender: linux-acpi-owner@vger.kernel.org
List-Id: linux-acpi@vger.kernel.org
To: Gabriele Paoloni <gabriele.paoloni@huawei.com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>, "rafael@kernel.org" <rafael@kernel.org>, "Rafael J. Wysocki" <rjw@rjwysocki.net>, "catalin.marinas@arm.com" <catalin.marinas@arm.com>, "will.deacon@arm.com" <will.deacon@arm.com>, "robh+dt@kernel.org" <robh+dt@kernel.org>, "frowand.list@gmail.com" <frowand.list@gmail.com>, "bhelgaas@google.com" <bhelgaas@google.com>, "arnd@arndb.de" <arnd@arndb.de>, "linux-arm-kernel@lists.infradead.org" <linux-arm-kernel@lists.infradead.org>, "mark.rutland@arm.com" <mark.rutland@arm.com>, "brian.starkey@arm.com" <brian.starkey@arm.com>, "olof@lixom.net" <olof@lixom.net>, "benh@kernel.crashing.org" <benh@kernel.crashing.org>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>, "linux-acpi@vger.kernel.org" <linux-acpi>

On Tue, Jun 13, 2017 at 02:38:26PM +0000, Gabriele Paoloni wrote:
> > Is there an example ASL showing how these LPC devices are
> > currently presented in ACPI?
> 
> Please find below the asl sketch for our LPC and IPMI
> 
> //
> // LPC
> //
> 
> Scope(_SB) {
>   Device (LPC0) {
>     Name (_HID, "HISI0191")  // HiSi LPC
>     Name (_CRS, ResourceTemplate () {
>       Memory32Fixed (ReadWrite, 0xa01b0000, 0x1000)
>     })
>   }
> 
>   Device (LPC0.IPMI) {
>     Name (_HID, "IPI0001")
>     Method (_IFT) {
>       Return (0x03)
>     }
>     Name (LORS, ResourceTemplate() {
>       QWordIO (
>         ResourceConsumer,
> 	MinNotFixed,     // _MIF
> 	MaxNotFixed,     // _MAF
> 	PosDecode,
> 	EntireRange,
> 	0x0,             // _GRA
> 	0xe4,            // _MIN
> 	0x3fff,          // _MAX
> 	0x0,             // _TRA
> 	0x04,            // _LEN
> 	, ,
> 	BTIO
>       )
>     })
>     CreateQWordField (LORS, BTIO._MIN, CMIN)
>     CreateQWordField (LORS, BTIO._MAX, CMAX)
>     CreateQWordField (LORS, BTIO._LEN, CLEN)
> 
>     Method (_PRS, 0) {
>       Return (LORS)
>     }
> 
>     Method (_CRS, 0) {
>       Return (LORS)
>     }
>     Method (_SRS, 1) {
>       CreateQWordField (Arg0, \_SB.LPC0.IPMI.BTIO._MIN, IMIN)
>       Store (IMIN, CMIN)
>       CreateQWordField (Arg0, \_SB.LPC0.IPMI.BTIO._MAX, IMAX)
>       Store (IMAX, CMAX)
>     }
>   } 
> [...]
> }

Thanks. So this looks pretty much like normal Linux MFD device which we
already have support for adding ACPI bindings to child devices. It
should also support splitting resources to child devices IIRC.