linux-kernel - Re: [PATCH AUTOSEL 5.10 11/47] mmc: sdhci-iproc: Add ACPI bindings for the RPi

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Message-ID: <YEvnXgCUmDzRbJ1w@sashalap>
Date:   Fri, 12 Mar 2021 17:12:46 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     Jeremy Linton <jeremy.linton@....com>
Cc:     linux-kernel@...r.kernel.org, stable@...r.kernel.org,
        Florian Fainelli <f.fainelli@...il.com>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        linux-mmc@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        bcm-kernel-feedback-list@...adcom.com
Subject: Re: [PATCH AUTOSEL 5.10 11/47] mmc: sdhci-iproc: Add ACPI bindings
 for the RPi

On Tue, Mar 02, 2021 at 10:16:59AM -0600, Jeremy Linton wrote:
>Hi,
>
>
>On 3/2/21 5:56 AM, Sasha Levin wrote:
>>From: Jeremy Linton <jeremy.linton@....com>
>>
>>[ Upstream commit 4f9833d3ec8da34861cd0680b00c73e653877eb9 ]
>>
>>The RPi4 has an Arasan controller it carries over from the RPi3 and a newer
>>eMMC2 controller.  Because of a couple of quirks, it seems wiser to bind
>>these controllers to the same driver that DT is using on this platform
>>rather than the generic sdhci_acpi driver with PNP0D40.
>>
>>So, BCM2847 describes the older Arasan and BRCME88C describes the newer
>>eMMC2. The older Arasan is reusing an existing ACPI _HID used by other OSes
>>booting these tables on the RPi.
>>
>>With this change, Linux is capable of utilizing the SD card slot, and the
>>Wi-Fi when booted with UEFI+ACPI on the RPi4.
>
>For this to actually work on kernels < 5.11 you also need:
>
>c5b1c6dc13da mmc: sdhci: Update firmware interface API

I'll take this one for 5.10 then, thanks!

-- 
Thanks,
Sasha