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mmc: sdhci-iproc: Add ACPI bindings for the RPi
[ Upstream commit 4f9833d ] 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. Signed-off-by: Jeremy Linton <jeremy.linton@arm.com> Acked-by: Florian Fainelli <f.fainelli@gmail.com> Link: https://lore.kernel.org/r/20210120000406.1843400-2-jeremy.linton@arm.com Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Sasha Levin <sashal@kernel.org>
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