diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-5.4/950-0929-overlays-Delete-spi0-hw-cs.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-5.4/950-0929-overlays-Delete-spi0-hw-cs.patch | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.4/950-0929-overlays-Delete-spi0-hw-cs.patch b/target/linux/bcm27xx/patches-5.4/950-0929-overlays-Delete-spi0-hw-cs.patch new file mode 100644 index 0000000000..044a3ad3f1 --- /dev/null +++ b/target/linux/bcm27xx/patches-5.4/950-0929-overlays-Delete-spi0-hw-cs.patch @@ -0,0 +1,87 @@ +From 9fcbc40311f8de3f7a0a27155f310ff19e150d76 Mon Sep 17 00:00:00 2001 +From: Phil Elwell <phil@raspberrypi.com> +Date: Thu, 30 Jul 2020 18:06:24 +0100 +Subject: [PATCH] overlays: Delete spi0-hw-cs + +The spi0-hw-cs overlay is unnecessary (and actually harmful) with the +current kernels. Delete it, leaving a note in the README and a +deprecation message from the firmware: + + dterror: overlay 'spi0-hw-cs' is deprecated: no longer necessary + +Signed-off-by: Phil Elwell <phil@raspberrypi.com> +--- + arch/arm/boot/dts/overlays/Makefile | 1 - + arch/arm/boot/dts/overlays/README | 6 ++--- + arch/arm/boot/dts/overlays/overlay_map.dts | 4 +++ + .../boot/dts/overlays/spi0-hw-cs-overlay.dts | 26 ------------------- + 4 files changed, 7 insertions(+), 30 deletions(-) + delete mode 100644 arch/arm/boot/dts/overlays/spi0-hw-cs-overlay.dts + +--- a/arch/arm/boot/dts/overlays/Makefile ++++ b/arch/arm/boot/dts/overlays/Makefile +@@ -159,7 +159,6 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \ + spi-gpio40-45.dtbo \ + spi-rtc.dtbo \ + spi0-cs.dtbo \ +- spi0-hw-cs.dtbo \ + spi1-1cs.dtbo \ + spi1-2cs.dtbo \ + spi1-3cs.dtbo \ +--- a/arch/arm/boot/dts/overlays/README ++++ b/arch/arm/boot/dts/overlays/README +@@ -2346,9 +2346,9 @@ Params: cs0_pin GPIO pin + + + Name: spi0-hw-cs +-Info: Re-enables hardware CS/CE (chip selects) for SPI0 +-Load: dtoverlay=spi0-hw-cs +-Params: <None> ++Info: This overlay has been deprecated and removed because it is no longer ++ necessary and has been seen to prevent spi0 from working. ++Load: <Deprecated> + + + Name: spi1-1cs +--- a/arch/arm/boot/dts/overlays/overlay_map.dts ++++ b/arch/arm/boot/dts/overlays/overlay_map.dts +@@ -61,6 +61,10 @@ + deprecated = "use sdio,bus_width=1,gpios_22_25"; + }; + ++ spi0-hw-cs { ++ deprecated = "no longer necessary"; ++ }; ++ + spi3-1cs { + bcm2711; + }; +--- a/arch/arm/boot/dts/overlays/spi0-hw-cs-overlay.dts ++++ /dev/null +@@ -1,26 +0,0 @@ +-/* +- * Device tree overlay to re-enable hardware CS for SPI0 +- */ +- +-/dts-v1/; +-/plugin/; +- +-/ { +- compatible = "brcm,bcm2835"; +- +- fragment@0 { +- target = <&spi0>; +- __overlay__ { +- cs-gpios = <0>, <0>; +- status = "okay"; +- }; +- }; +- +- fragment@1 { +- target = <&spi0_cs_pins>; +- __overlay__ { +- brcm,pins = <8 7>; +- brcm,function = <4>; /* alt0 */ +- }; +- }; +-}; |