bcm27xx: add linux 5.4 support

Tested on bcm2710 (Raspberry Pi 3B).

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

1 files changed, 32 insertions, 0 deletions

diff --git a/target/linux/bcm27xx/patches-5.4/950-0094-raspberrypi-firmware-Export-the-general-transaction-.patch b/target/linux/bcm27xx/patches-5.4/950-0094-raspberrypi-firmware-Export-the-general-transaction-.patch
new file mode 100644
index 0000000000..02f1a6ffd4
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.4/950-0094-raspberrypi-firmware-Export-the-general-transaction-.patch
@@ -0,0 +1,32 @@
+From e8d812ff247c8d194bee2d353baf8cc3bbd52690 Mon Sep 17 00:00:00 2001
+From: Eric Anholt <eric@anholt.net>
+Date: Wed, 14 Sep 2016 09:16:19 +0100
+Subject: [PATCH] raspberrypi-firmware: Export the general transaction
+ function.
+
+The vc4-firmware-kms module is going to be doing the MBOX FB call.
+
+Signed-off-by: Eric Anholt <eric@anholt.net>
+---
+ drivers/firmware/raspberrypi.c | 3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+--- a/drivers/firmware/raspberrypi.c
++++ b/drivers/firmware/raspberrypi.c
+@@ -43,7 +43,7 @@ static void response_callback(struct mbo
+  * Sends a request to the firmware through the BCM2835 mailbox driver,
+  * and synchronously waits for the reply.
+  */
+-static int
++int
+ rpi_firmware_transaction(struct rpi_firmware *fw, u32 chan, u32 data)
+ {
+ 	u32 message = MBOX_MSG(chan, data);
+@@ -68,6 +68,7 @@ rpi_firmware_transaction(struct rpi_firm
+ 
+ 	return ret;
+ }
++EXPORT_SYMBOL_GPL(rpi_firmware_transaction);
+ 
+ /**
+  * rpi_firmware_property_list - Submit firmware property list