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88 lines
2.3 KiB
Diff
88 lines
2.3 KiB
Diff
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From 9fcbc40311f8de3f7a0a27155f310ff19e150d76 Mon Sep 17 00:00:00 2001
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From: Phil Elwell <phil@raspberrypi.com>
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Date: Thu, 30 Jul 2020 18:06:24 +0100
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Subject: [PATCH] overlays: Delete spi0-hw-cs
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The spi0-hw-cs overlay is unnecessary (and actually harmful) with the
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current kernels. Delete it, leaving a note in the README and a
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deprecation message from the firmware:
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dterror: overlay 'spi0-hw-cs' is deprecated: no longer necessary
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Signed-off-by: Phil Elwell <phil@raspberrypi.com>
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---
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arch/arm/boot/dts/overlays/Makefile | 1 -
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arch/arm/boot/dts/overlays/README | 6 ++---
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arch/arm/boot/dts/overlays/overlay_map.dts | 4 +++
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.../boot/dts/overlays/spi0-hw-cs-overlay.dts | 26 -------------------
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4 files changed, 7 insertions(+), 30 deletions(-)
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delete mode 100644 arch/arm/boot/dts/overlays/spi0-hw-cs-overlay.dts
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--- a/arch/arm/boot/dts/overlays/Makefile
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+++ b/arch/arm/boot/dts/overlays/Makefile
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@@ -159,7 +159,6 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
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spi-gpio40-45.dtbo \
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spi-rtc.dtbo \
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spi0-cs.dtbo \
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- spi0-hw-cs.dtbo \
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spi1-1cs.dtbo \
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spi1-2cs.dtbo \
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spi1-3cs.dtbo \
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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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@@ -2346,9 +2346,9 @@ Params: cs0_pin GPIO pin
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Name: spi0-hw-cs
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-Info: Re-enables hardware CS/CE (chip selects) for SPI0
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-Load: dtoverlay=spi0-hw-cs
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-Params: <None>
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+Info: This overlay has been deprecated and removed because it is no longer
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+ necessary and has been seen to prevent spi0 from working.
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+Load: <Deprecated>
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Name: spi1-1cs
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--- a/arch/arm/boot/dts/overlays/overlay_map.dts
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+++ b/arch/arm/boot/dts/overlays/overlay_map.dts
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@@ -61,6 +61,10 @@
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deprecated = "use sdio,bus_width=1,gpios_22_25";
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};
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+ spi0-hw-cs {
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+ deprecated = "no longer necessary";
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+ };
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+
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spi3-1cs {
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bcm2711;
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};
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--- a/arch/arm/boot/dts/overlays/spi0-hw-cs-overlay.dts
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+++ /dev/null
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@@ -1,26 +0,0 @@
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-/*
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- * Device tree overlay to re-enable hardware CS for SPI0
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- */
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-
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-/dts-v1/;
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-/plugin/;
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-
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-/ {
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- compatible = "brcm,bcm2835";
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-
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- fragment@0 {
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- target = <&spi0>;
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- __overlay__ {
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- cs-gpios = <0>, <0>;
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- status = "okay";
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- };
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- };
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-
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- fragment@1 {
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- target = <&spi0_cs_pins>;
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- __overlay__ {
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- brcm,pins = <8 7>;
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- brcm,function = <4>; /* alt0 */
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- };
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- };
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-};
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