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-rw-r--r--target/linux/brcm2708/patches-4.19/950-0519-tty-amba-pl011-allow-shared-interrupt.patch28
1 files changed, 28 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.19/950-0519-tty-amba-pl011-allow-shared-interrupt.patch b/target/linux/brcm2708/patches-4.19/950-0519-tty-amba-pl011-allow-shared-interrupt.patch
new file mode 100644
index 0000000000..db3f142493
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.19/950-0519-tty-amba-pl011-allow-shared-interrupt.patch
@@ -0,0 +1,28 @@
+From fb5466dea2158c5f362d52ce5ffd67c5e3c2edc8 Mon Sep 17 00:00:00 2001
+From: Doug Berger <opendmb@gmail.com>
+Date: Mon, 13 May 2019 20:59:45 +0200
+Subject: [PATCH 519/782] tty: amba-pl011: allow shared interrupt
+
+The PL011 register space includes all necessary status bits to
+determine whether a device instance requires handling in response
+to an interrupt. Therefore, multiple instances of the device could
+be serviced by a single shared interrupt, which is the case on BCM7211.
+
+Signed-off-by: Doug Berger <opendmb@gmail.com>
+Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
+---
+ drivers/tty/serial/amba-pl011.c | 3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+--- a/drivers/tty/serial/amba-pl011.c
++++ b/drivers/tty/serial/amba-pl011.c
+@@ -1735,7 +1735,8 @@ static int pl011_allocate_irq(struct uar
+ {
+ pl011_write(uap->im, uap, REG_IMSC);
+
+- return request_irq(uap->port.irq, pl011_int, 0, "uart-pl011", uap);
++ return request_irq(uap->port.irq, pl011_int, IRQF_SHARED, "uart-pl011",
++ uap);
+ }
+
+ /*