2019-09-19 14:43:19 +00:00
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From 649efe5db3900ed3bbfd3c3daa3b96d8fc0b9d68 Mon Sep 17 00:00:00 2001
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2019-07-09 18:32:28 +00:00
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From: Phil Elwell <phil@raspberrypi.org>
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Date: Fri, 22 Mar 2019 16:44:47 +0000
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2019-12-23 12:42:55 +00:00
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Subject: [PATCH] overlays: Fix multiple-instantiation of sc16is7xx*
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2019-07-09 18:32:28 +00:00
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The registration of the fixed clocks uses the node name as the clock
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name, causing a clash if two clock nodes have the same name, regardless
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of the path to the node. Fix the issue by overwriting the clock node
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names using the value of the "addr" parameter, providing a crude
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disambiguation. (A bit of string pasting to form "sc16is752_clk_<addr>"
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would have been nice, but that is outside the abilities of the overlay
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parameter mechanism.)
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Also give the sc16is750-i2c overlay the xtal parameter for symmetry.
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See: https://www.raspberrypi.org/forums/viewtopic.php?f=107&t=235650
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Signed-off-by: Phil Elwell <phil@raspberrypi.org>
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---
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arch/arm/boot/dts/overlays/README | 1 +
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arch/arm/boot/dts/overlays/sc16is750-i2c-overlay.dts | 3 ++-
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arch/arm/boot/dts/overlays/sc16is752-i2c-overlay.dts | 2 +-
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3 files changed, 4 insertions(+), 2 deletions(-)
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--- a/arch/arm/boot/dts/overlays/README
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+++ b/arch/arm/boot/dts/overlays/README
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@@ -1725,6 +1725,7 @@ Info: Overlay for the NXP SC16IS750 UA
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Load: dtoverlay=sc16is750-i2c,<param>=<val>
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Params: int_pin GPIO used for IRQ (default 24)
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addr Address (default 0x48)
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+ xtal On-board crystal frequency (default 14745600)
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Name: sc16is752-i2c
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--- a/arch/arm/boot/dts/overlays/sc16is750-i2c-overlay.dts
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+++ b/arch/arm/boot/dts/overlays/sc16is750-i2c-overlay.dts
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@@ -31,7 +31,8 @@
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__overrides__ {
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int_pin = <&sc16is750>,"interrupts:0";
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- addr = <&sc16is750>,"reg:0";
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+ addr = <&sc16is750>,"reg:0",<&sc16is750_clk>,"name";
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+ xtal = <&sc16is750>,"clock-frequency:0";
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};
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};
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--- a/arch/arm/boot/dts/overlays/sc16is752-i2c-overlay.dts
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+++ b/arch/arm/boot/dts/overlays/sc16is752-i2c-overlay.dts
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@@ -34,7 +34,7 @@
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__overrides__ {
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int_pin = <&sc16is752>,"interrupts:0";
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- addr = <&sc16is752>,"reg:0";
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+ addr = <&sc16is752>,"reg:0",<&sc16is752_clk>,"name";
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xtal = <&sc16is752>,"clock-frequency:0";
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};
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};
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