1 files changed, 38 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.4/950-0709-overlays-sc16is752-spi1-Add-xtal-parameter.patch b/target/linux/bcm27xx/patches-5.4/950-0709-overlays-sc16is752-spi1-Add-xtal-parameter.patch
new file mode 100644
index 0000000000..582c32aa90
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.4/950-0709-overlays-sc16is752-spi1-Add-xtal-parameter.patch
@@ -0,0 +1,38 @@
+From 48bf88ebb1abf55168f636d7a6edf2ca79be13c6 Mon Sep 17 00:00:00 2001
+From: Phil Elwell <phil@raspberrypi.com>
+Date: Wed, 6 May 2020 14:25:20 +0100
+Subject: [PATCH] overlays: sc16is752-spi1: Add xtal parameter
+
+The other sc16is75x overlays have an xtal parameter to allow a
+different crystal frequency to be specified, but sc16is752-spi1
+doesn't. Fix this omission.
+
+See: https://www.raspberrypi.org/forums/viewtopic.php?f=107&t=273234
+
+Signed-off-by: Phil Elwell <phil@raspberrypi.com>
+---
+ arch/arm/boot/dts/overlays/README                     | 1 +
+ arch/arm/boot/dts/overlays/sc16is752-spi1-overlay.dts | 3 ++-
+ 2 files changed, 3 insertions(+), 1 deletion(-)
+
+--- a/arch/arm/boot/dts/overlays/README
++++ b/arch/arm/boot/dts/overlays/README
+@@ -2114,6 +2114,7 @@ Info:   Overlay for the NXP SC16IS752 Du
+ 
+ Load:   dtoverlay=sc16is752-spi1,<param>=<val>
+ Params: int_pin                 GPIO used for IRQ (default 24)
++        xtal                    On-board crystal frequency (default 14745600)
+ 
+ 
+ Name:   sdhost
+--- a/arch/arm/boot/dts/overlays/sc16is752-spi1-overlay.dts
++++ b/arch/arm/boot/dts/overlays/sc16is752-spi1-overlay.dts
+@@ -56,6 +56,7 @@
+ 	};
+ 
+     __overrides__ {
+-      int_pin = <&sc16is752>,"interrupts:0";
++		int_pin = <&sc16is752>,"interrupts:0";
++		xtal = <&sc16is752_clk>,"clock-frequency:0";
+     };
+ };