linux-kernel - Re: [PATCH] mmc: sdhci-acpi: set non-removable in ACPI table

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Date:	Mon, 7 Dec 2015 10:30:03 +0200
From:	Adrian Hunter <adrian.hunter@...el.com>
To:	Philip Elcan <pelcan@...eaurora.org>,
	Ulf Hansson <ulf.hansson@...aro.org>,
	linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:	linux-arm-msm@...r.kernel.org, Timur Tabi <timur@...eaurora.org>,
	Jon Masters <jcm@...hat.org>,
	Mark Langsdorf <mlangsdo@...hat.com>
Subject: Re: [PATCH] mmc: sdhci-acpi: set non-removable in ACPI table

On 04/12/15 17:40, Philip Elcan wrote:
> 
> On 12/03/2015 09:14 AM, Adrian Hunter wrote:
>> On 03/12/15 15:48, Philip Elcan wrote:
>>> This allows setting an SDHC controller as non-removable
>>> by using the _RMV method in the ACPI table. It doesn't
>> Is that _RMV on the host controller?  Shouldn't it be on the card i.e. child
>> device node?
> 
> Yes, this is on the host controller. The ACPI table only describes the
> host controller, not the child nodes.
> 

If you look at Intel devices, the _RMV is on the child e.g.

        Device (SDHA)
        {
            Name (_HID, "80860F14")  // _HID: Hardware ID
            Name (_CID, "PNP0D40")  // _CID: Compatible ID
            Name (_DDN, "Intel(R) eMMC Controller - 80860F14")  // _DDN: DOS Device Name
	    ...
            Device (EMMD)
            {
		...
                Method (_RMV, 0, NotSerialized)  // _RMV: Removal Status
                {
                    Return (Zero)
                }
            }
        }

I am not an ACPI expert but that seems like the correct place for it.

>>
>>> mark it as non-removable if GPIO card detection is
>>> already setup.
>>>
>>> Signed-off-by: Philip Elcan <pelcan@...eaurora.org>
>>> ---
>>>
> 

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