From: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
To: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>,
linux-kernel@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org, linux@armlinux.org.uk,
catalin.marinas@arm.com, will@kernel.org,
devicetree@vger.kernel.org, linux-rpi-kernel@lists.infradead.org,
robh+dt@kernel.org, bcm-kernel-feedback-list@broadcom.com,
tim.gover@raspberrypi.com, phil@raspberrypi.com
Subject: Re: [PATCH v3 0/5] Expose RPi4's bootloader configuration
Date: Mon, 18 Jan 2021 16:50:20 +0000 [thread overview]
Message-ID: <e8ca9365-a1f2-1f9d-377c-13bf97883cce@linaro.org> (raw)
In-Reply-To: <20210112142342.7290-1-nsaenzjulienne@suse.de>
On 12/01/2021 14:23, Nicolas Saenz Julienne wrote:
> Soon to be released versions of RPi4's firmware will take of care
> passing their bootloader's configuration[1] to the OS by copying it into
> memory and creating a reserved memory node in the board's DT. By
> modeling this reserved memory node as an nvmem device using
> 'nvmem-rmem', which this series introduces, user-space applications will
> be able to query this information through nvmem's sysfs interface.
>
> An alternative approach, less nice IMO, would be to create a
> platform-specific 'soc' driver.
>
> Regards,
> Nicolas
>
> [1] https://www.raspberrypi.org/documentation/hardware/raspberrypi/bcm2711_bootloader_config.md
>
> ---
>
> Changes since v2:
> - Fix DT bingins
>
> Changes since v1:
> - Avoid the reserved-memory indirection by integrating the nvmem driver
> into the reserved memory node.
>
> Nicolas Saenz Julienne (5):
> dt-bindings: nvmem: Add bindings for rmem driver
> nvmem: Add driver to expose reserved memory as nvmem
> ARM: dts: bcm2711: Add reserved memory template to hold firmware
> configuration
> arm64: defconfig: Enable nvmem's rmem driver
> ARM: multi_v7_defconfig: Enable nvmem's rmem driver
>
Thanks Applied (1/5) and (2/5), rest of patches should go via arm-soc tree!
--srini
> .../devicetree/bindings/nvmem/rmem.yaml | 49 ++++++++++
> arch/arm/boot/dts/bcm2711-rpi-4-b.dts | 17 ++++
> arch/arm/configs/multi_v7_defconfig | 1 +
> arch/arm64/configs/defconfig | 1 +
> drivers/nvmem/Kconfig | 8 ++
> drivers/nvmem/Makefile | 2 +
> drivers/nvmem/rmem.c | 97 +++++++++++++++++++
> drivers/of/platform.c | 1 +
> 8 files changed, 176 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/nvmem/rmem.yaml
> create mode 100644 drivers/nvmem/rmem.c
>
WARNING: multiple messages have this Message-ID (diff)
From: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
To: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>,
linux-kernel@vger.kernel.org
Cc: devicetree@vger.kernel.org, tim.gover@raspberrypi.com,
catalin.marinas@arm.com, linux@armlinux.org.uk,
robh+dt@kernel.org, bcm-kernel-feedback-list@broadcom.com,
linux-rpi-kernel@lists.infradead.org, will@kernel.org,
phil@raspberrypi.com, linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v3 0/5] Expose RPi4's bootloader configuration
Date: Mon, 18 Jan 2021 16:50:20 +0000 [thread overview]
Message-ID: <e8ca9365-a1f2-1f9d-377c-13bf97883cce@linaro.org> (raw)
In-Reply-To: <20210112142342.7290-1-nsaenzjulienne@suse.de>
On 12/01/2021 14:23, Nicolas Saenz Julienne wrote:
> Soon to be released versions of RPi4's firmware will take of care
> passing their bootloader's configuration[1] to the OS by copying it into
> memory and creating a reserved memory node in the board's DT. By
> modeling this reserved memory node as an nvmem device using
> 'nvmem-rmem', which this series introduces, user-space applications will
> be able to query this information through nvmem's sysfs interface.
>
> An alternative approach, less nice IMO, would be to create a
> platform-specific 'soc' driver.
>
> Regards,
> Nicolas
>
> [1] https://www.raspberrypi.org/documentation/hardware/raspberrypi/bcm2711_bootloader_config.md
>
> ---
>
> Changes since v2:
> - Fix DT bingins
>
> Changes since v1:
> - Avoid the reserved-memory indirection by integrating the nvmem driver
> into the reserved memory node.
>
> Nicolas Saenz Julienne (5):
> dt-bindings: nvmem: Add bindings for rmem driver
> nvmem: Add driver to expose reserved memory as nvmem
> ARM: dts: bcm2711: Add reserved memory template to hold firmware
> configuration
> arm64: defconfig: Enable nvmem's rmem driver
> ARM: multi_v7_defconfig: Enable nvmem's rmem driver
>
Thanks Applied (1/5) and (2/5), rest of patches should go via arm-soc tree!
--srini
> .../devicetree/bindings/nvmem/rmem.yaml | 49 ++++++++++
> arch/arm/boot/dts/bcm2711-rpi-4-b.dts | 17 ++++
> arch/arm/configs/multi_v7_defconfig | 1 +
> arch/arm64/configs/defconfig | 1 +
> drivers/nvmem/Kconfig | 8 ++
> drivers/nvmem/Makefile | 2 +
> drivers/nvmem/rmem.c | 97 +++++++++++++++++++
> drivers/of/platform.c | 1 +
> 8 files changed, 176 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/nvmem/rmem.yaml
> create mode 100644 drivers/nvmem/rmem.c
>
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http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2021-01-18 16:51 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-12 14:23 [PATCH v3 0/5] Expose RPi4's bootloader configuration Nicolas Saenz Julienne
2021-01-12 14:23 ` Nicolas Saenz Julienne
2021-01-12 14:23 ` [PATCH v3 1/5] dt-bindings: nvmem: Add bindings for rmem driver Nicolas Saenz Julienne
2021-01-12 14:23 ` Nicolas Saenz Julienne
2021-01-14 20:17 ` Rob Herring
2021-01-14 20:17 ` Rob Herring
2021-01-12 14:23 ` [PATCH v3 2/5] nvmem: Add driver to expose reserved memory as nvmem Nicolas Saenz Julienne
2021-01-12 14:23 ` Nicolas Saenz Julienne
2021-01-12 14:23 ` [PATCH v3 3/5] ARM: dts: bcm2711: Add reserved memory template to hold firmware configuration Nicolas Saenz Julienne
2021-01-12 14:23 ` Nicolas Saenz Julienne
2021-01-12 14:23 ` [PATCH v3 4/5] arm64: defconfig: Enable nvmem's rmem driver Nicolas Saenz Julienne
2021-01-12 14:23 ` Nicolas Saenz Julienne
2021-01-12 14:23 ` [PATCH v3 5/5] ARM: multi_v7_defconfig: " Nicolas Saenz Julienne
2021-01-12 14:23 ` Nicolas Saenz Julienne
2021-01-18 16:50 ` Srinivas Kandagatla [this message]
2021-01-18 16:50 ` [PATCH v3 0/5] Expose RPi4's bootloader configuration Srinivas Kandagatla
2021-01-25 21:04 ` Nicolas Saenz Julienne
2021-01-25 21:04 ` Nicolas Saenz Julienne
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