From: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
To: srinivas.kandagatla@linaro.org,
Saenz Julienne <nsaenzjulienne@suse.de>,
devicetree@vger.kernel.org,
bcm-kernel-feedback-list@broadcom.com,
linux-rpi-kernel@lists.infradead.org,
linux-arm-kernel@lists.infradead.org,
Rob Herring <robh+dt@kernel.org>
Cc: linux-kernel@vger.kernel.org, linux@armlinux.org.uk,
catalin.marinas@arm.com, will@kernel.org,
tim.gover@raspberrypi.com, phil@raspberrypi.com
Subject: [PATCH 4/6] ARM: dts: bcm2711: Expose boot-loader configuration
Date: Tue, 15 Dec 2020 16:56:24 +0100 [thread overview]
Message-ID: <20201215155627.2513-5-nsaenzjulienne@suse.de> (raw)
In-Reply-To: <20201215155627.2513-1-nsaenzjulienne@suse.de>
RPi4's co-processor will copy the board's bootloader configuration in
memory. Expose it to user-space by using 'nvmem-rmem'.
Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
---
arch/arm/boot/dts/bcm2711-rpi-4-b.dts | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/arch/arm/boot/dts/bcm2711-rpi-4-b.dts b/arch/arm/boot/dts/bcm2711-rpi-4-b.dts
index c58e58e8ce39..261169eb5e3b 100644
--- a/arch/arm/boot/dts/bcm2711-rpi-4-b.dts
+++ b/arch/arm/boot/dts/bcm2711-rpi-4-b.dts
@@ -26,6 +26,17 @@ aliases {
ethernet0 = &genet;
pcie0 = &pcie0;
eeprom = &eeprom;
+ fw_config = &fw_config;
+ };
+
+ fw_config: fw-config {
+ compatible = "nvmem-rmem";
+ memory-region = <&eeprom>;
+ /*
+ * Will be enabled by the bootloader if the reserved memory
+ * region is valid.
+ */
+ status = "disabled";
};
leds {
--
2.29.2
next prev parent reply other threads:[~2020-12-15 16:02 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-15 15:56 [PATCH 0/6] Expose RPi4'd bootloader configuration Nicolas Saenz Julienne
2020-12-15 15:56 ` [PATCH 1/6] dt-bindings: nvmem: Add bindings for rmem driver Nicolas Saenz Julienne
2020-12-15 20:25 ` Rob Herring
2020-12-15 21:16 ` Nicolas Saenz Julienne
2020-12-15 15:56 ` [PATCH 2/6] nvmem: Add driver to expose reserved memory as nvmem Nicolas Saenz Julienne
2020-12-15 15:56 ` [PATCH 3/6] ARM: dts: bcm2711: Add reserved memory template to hold firmware configuration Nicolas Saenz Julienne
2020-12-15 20:27 ` Rob Herring
2020-12-15 15:56 ` Nicolas Saenz Julienne [this message]
2020-12-15 15:56 ` [PATCH 5/6] arm64: defconfig: Enable nvmem's rmem driver Nicolas Saenz Julienne
2020-12-15 15:56 ` [PATCH 6/6] ARM: multi_v7_defconfig: " Nicolas Saenz Julienne
2020-12-15 16:05 ` [PATCH 0/6] Expose RPi4'd bootloader configuration Nicolas Saenz Julienne
2020-12-15 18:44 ` Catalin Marinas
2020-12-15 19:01 ` Nicolas Saenz Julienne
2020-12-15 19:54 ` Rob Herring
2020-12-15 21:21 ` Nicolas Saenz Julienne
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