bcm27xx: add support for linux v5.15

Build system: x86_64
Build-tested: bcm2708, bcm2709, bcm2710, bcm2711
Run-tested: bcm2708/RPiB+, bcm2709/RPi3B, bcm2710/RPi3B, bcm2711/RPi4B

Signed-off-by: Marty Jones <mj8263788@gmail.com>
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

1 files changed, 28 insertions, 0 deletions

diff --git a/target/linux/bcm27xx/patches-5.15/950-0519-mmc-sdhci-iproc-Fix-vmmc-regulators-pre-bcm2711.patch b/target/linux/bcm27xx/patches-5.15/950-0519-mmc-sdhci-iproc-Fix-vmmc-regulators-pre-bcm2711.patch
new file mode 100644
index 0000000000..15f225c8e6
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.15/950-0519-mmc-sdhci-iproc-Fix-vmmc-regulators-pre-bcm2711.patch
@@ -0,0 +1,28 @@
+From dc50e276ae888c06e2daf8549b85dd3ed1765115 Mon Sep 17 00:00:00 2001
+From: Juerg Haefliger <juergh@canonical.com>
+Date: Wed, 29 Sep 2021 11:42:23 +0200
+Subject: [PATCH] mmc: sdhci-iproc: Fix vmmc regulators (pre-bcm2711)
+
+The Linux support for controlling card power via regulators appears to
+be contentious. I would argue that the default behaviour is contrary to
+the SDHCI spec - turning off the power writes a reserved value to the
+SD Bus Voltage Select field of the Power Control Register, which
+seems to kill the Arasan/iProc controller - but fortunately there is a
+hook in sdhci_ops to override the behaviour.
+
+Signed-off-by: Juerg Haefliger <juergh@canonical.com>
+Signed-off-by: Phil Elwell <phil@raspberrypi.com>
+---
+ drivers/mmc/host/sdhci-iproc.c | 1 +
+ 1 file changed, 1 insertion(+)
+
+--- a/drivers/mmc/host/sdhci-iproc.c
++++ b/drivers/mmc/host/sdhci-iproc.c
+@@ -207,6 +207,7 @@ static const struct sdhci_ops sdhci_ipro
+ 	.write_b = sdhci_iproc_writeb,
+ 	.set_clock = sdhci_set_clock,
+ 	.get_max_clock = sdhci_iproc_get_max_clock,
++	.set_power = sdhci_set_power_and_bus_voltage,
+ 	.set_bus_width = sdhci_set_bus_width,
+ 	.reset = sdhci_reset,
+ 	.set_uhs_signaling = sdhci_set_uhs_signaling,