On Tue, Mar 02, 2021 at 10:16:59AM -0600, Jeremy Linton wrote:

Hi,


On 3/2/21 5:56 AM, Sasha Levin wrote:

quoted

From: Jeremy Linton <redacted>

[ 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