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57 lines
2.2 KiB
Diff
57 lines
2.2 KiB
Diff
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From 147ddfdaf626fe5484596235bba8bdc6dcfde501 Mon Sep 17 00:00:00 2001
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From: Phil Elwell <phil@raspberrypi.com>
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Date: Fri, 20 Dec 2024 15:08:52 +0000
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Subject: [PATCH] dts: Add noanthogs parameter to CM4 and CM5
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By default, the antenna selection on CM4 and CM5 is fixed at boot time,
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with the dtparams ant1, ant2 and noant selecting which should be
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enabled. Add a new dtparam - noanthogs - which leaves the GPIOs free
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to be controlled at runtime by the OS.
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N.B. Using this parameter without suitable OS support will leave both
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antennae disabled, resulting in attenuated WiFi and Bluetooth signals.
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Signed-off-by: Phil Elwell <phil@raspberrypi.com>
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---
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arch/arm/boot/dts/broadcom/bcm2711-rpi-cm4.dts | 2 ++
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arch/arm/boot/dts/overlays/README | 6 ++++++
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arch/arm64/boot/dts/broadcom/bcm2712-rpi-cm5.dtsi | 2 ++
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3 files changed, 10 insertions(+)
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--- a/arch/arm/boot/dts/broadcom/bcm2711-rpi-cm4.dts
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+++ b/arch/arm/boot/dts/broadcom/bcm2711-rpi-cm4.dts
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@@ -493,6 +493,8 @@ i2c_csi_dsi0: &i2c0 {
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<&ant1>, "output-low?=on",
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<&ant2>, "output-high?=off",
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<&ant2>, "output-low?=on";
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+ noanthogs = <&ant1>,"status=disabled",
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+ <&ant2>, "status=disabled";
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pcie_tperst_clk_ms = <&pcie0>,"brcm,tperst-clk-ms:0";
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};
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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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@@ -153,6 +153,12 @@ Params:
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noant Disable both antennas. CM4/5 only.
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+ noanthogs Disable the GPIO hogs on the antenna controls
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+ so they can be controlled at runtime. Note that
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+ using this parameter without suitable OS
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+ support will result in attenuated WiFi and
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+ Bluetooth signals. CM4/5 only.
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+
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audio Set to "on" to enable the onboard ALSA audio
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interface (default "off")
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--- a/arch/arm64/boot/dts/broadcom/bcm2712-rpi-cm5.dtsi
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+++ b/arch/arm64/boot/dts/broadcom/bcm2712-rpi-cm5.dtsi
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@@ -750,5 +750,7 @@ spi10_cs_pins: &spi10_cs_gpio1 {};
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<&ant1>, "output-low?=on",
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<&ant2>, "output-high?=off",
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<&ant2>, "output-low?=on";
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+ noanthogs = <&ant1>,"status=disabled",
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+ <&ant2>, "status=disabled";
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};
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};
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