From: Stephen Warren <swarren@wwwdotorg.org>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH 5/5] rpi: BCM2837 and Raspberry Pi 3 32-bit support
Date: Thu, 24 Mar 2016 21:08:31 -0600 [thread overview]
Message-ID: <56F4ABAF.6030302@wwwdotorg.org> (raw)
In-Reply-To: <1458795294-9511-5-git-send-email-swarren@wwwdotorg.org>
On 03/23/2016 10:54 PM, Stephen Warren wrote:
> The Raspberry Pi 3 contains a BCM2837 SoC. The BCM2837 is a BCM2836 with
> the CPU complex swapped out for a quad-core ARMv8. This can operate in 32-
> or 64-bit mode. 32-bit mode is the current default selected by the
> VideoCore firmware on the Raspberry Pi 3. This patch adds a 32-bit port of
> U-Boot for the Raspberry Pi 3.
...
> A recent version of the VC firmware is required to ensure that the mini
> UART is fully and correctly initialized by the VC FW. At least
> firmware.git commit 7f536a27cc74 "kernel: lirc_rpi: Lower IR reception
> error to debug See: https://github.com/raspberrypi/linux/pull/1361" is
> required. However, note that there is a bug in that version that prevents
> MMC from operating correctly on any Pi. As of 20160323 that is not fixed.
The MMC bug has been fixed, so I'll revise this patch description since
I have to resend anyway.
> diff --git a/arch/arm/mach-bcm283x/Kconfig b/arch/arm/mach-bcm283x/Kconfig
> +config TARGET_RPI_3_32B
> + bool "Raspberry Pi 3 32-bit build"
> + Support for all BCM2837-based Raspberry Pi variants, such as
> + the RPi 3 model B, in AArch32 (32-bit) mode.
I missed the "help" line there. I fail for adding "comments" and not
test building:-(
prev parent reply other threads:[~2016-03-25 3:08 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-24 4:54 [U-Boot] [PATCH 1/5] ARM: bcm2835: move CONFIG_BCM283* to Kconfig Stephen Warren
2016-03-24 4:54 ` [U-Boot] [PATCH 2/5] rpi: use constant "unknown board" DT filename Stephen Warren
2016-03-24 4:54 ` [U-Boot] [PATCH 3/5] rpi: add Raspberry Pi 3 board ID Stephen Warren
2016-03-24 4:54 ` [U-Boot] [PATCH 4/5] ARM: bcm2835: expand Kconfig target descriptions Stephen Warren
2016-03-24 4:54 ` [U-Boot] [PATCH 5/5] rpi: BCM2837 and Raspberry Pi 3 32-bit support Stephen Warren
2016-03-25 3:08 ` Stephen Warren [this message]
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