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Diffstat (limited to 'target/linux/brcm2708/patches-4.19/950-0329-overlays-Fix-multiple-instantiation-of-sc16is7xx.patch')
-rw-r--r--target/linux/brcm2708/patches-4.19/950-0329-overlays-Fix-multiple-instantiation-of-sc16is7xx.patch57
1 files changed, 57 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.19/950-0329-overlays-Fix-multiple-instantiation-of-sc16is7xx.patch b/target/linux/brcm2708/patches-4.19/950-0329-overlays-Fix-multiple-instantiation-of-sc16is7xx.patch
new file mode 100644
index 0000000000..86fd110342
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.19/950-0329-overlays-Fix-multiple-instantiation-of-sc16is7xx.patch
@@ -0,0 +1,57 @@
+From 649efe5db3900ed3bbfd3c3daa3b96d8fc0b9d68 Mon Sep 17 00:00:00 2001
+From: Phil Elwell <phil@raspberrypi.org>
+Date: Fri, 22 Mar 2019 16:44:47 +0000
+Subject: [PATCH] overlays: Fix multiple-instantiation of sc16is7xx*
+
+The registration of the fixed clocks uses the node name as the clock
+name, causing a clash if two clock nodes have the same name, regardless
+of the path to the node. Fix the issue by overwriting the clock node
+names using the value of the "addr" parameter, providing a crude
+disambiguation. (A bit of string pasting to form "sc16is752_clk_<addr>"
+would have been nice, but that is outside the abilities of the overlay
+parameter mechanism.)
+
+Also give the sc16is750-i2c overlay the xtal parameter for symmetry.
+
+See: https://www.raspberrypi.org/forums/viewtopic.php?f=107&t=235650
+
+Signed-off-by: Phil Elwell <phil@raspberrypi.org>
+---
+ arch/arm/boot/dts/overlays/README | 1 +
+ arch/arm/boot/dts/overlays/sc16is750-i2c-overlay.dts | 3 ++-
+ arch/arm/boot/dts/overlays/sc16is752-i2c-overlay.dts | 2 +-
+ 3 files changed, 4 insertions(+), 2 deletions(-)
+
+--- a/arch/arm/boot/dts/overlays/README
++++ b/arch/arm/boot/dts/overlays/README
+@@ -1725,6 +1725,7 @@ Info: Overlay for the NXP SC16IS750 UA
+ Load: dtoverlay=sc16is750-i2c,<param>=<val>
+ Params: int_pin GPIO used for IRQ (default 24)
+ addr Address (default 0x48)
++ xtal On-board crystal frequency (default 14745600)
+
+
+ Name: sc16is752-i2c
+--- a/arch/arm/boot/dts/overlays/sc16is750-i2c-overlay.dts
++++ b/arch/arm/boot/dts/overlays/sc16is750-i2c-overlay.dts
+@@ -31,7 +31,8 @@
+
+ __overrides__ {
+ int_pin = <&sc16is750>,"interrupts:0";
+- addr = <&sc16is750>,"reg:0";
++ addr = <&sc16is750>,"reg:0",<&sc16is750_clk>,"name";
++ xtal = <&sc16is750>,"clock-frequency:0";
+ };
+
+ };
+--- a/arch/arm/boot/dts/overlays/sc16is752-i2c-overlay.dts
++++ b/arch/arm/boot/dts/overlays/sc16is752-i2c-overlay.dts
+@@ -34,7 +34,7 @@
+
+ __overrides__ {
+ int_pin = <&sc16is752>,"interrupts:0";
+- addr = <&sc16is752>,"reg:0";
++ addr = <&sc16is752>,"reg:0",<&sc16is752_clk>,"name";
+ xtal = <&sc16is752>,"clock-frequency:0";
+ };
+ };