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@arm.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!