From: Tom Rini <trini@konsulko.com>
To: u-boot@lists.denx.de
Subject: [RFC PATCH 5/5] board: Add new Samsung "stemmy" board based on ST-Ericsson U8500
Date: Thu, 23 Jan 2020 16:58:44 -0500 [thread overview]
Message-ID: <20200123215844.GN26536@bill-the-cat> (raw)
In-Reply-To: <20200104174519.19238-6-stephan@gerhold.net>
On Sat, Jan 04, 2020 at 06:45:19PM +0100, Stephan Gerhold wrote:
> The ST-Ericsson U8500 SoC has been used in mass-production for
> some Android smartphones released around 2012.
> In particular, Samsung has released more than 5 different
> smartphones based on U8500, e.g.
>
> - Samsung Galaxy S III mini (GT-I8190) "golden"
> - Samsung Galaxy S Advance (GT-I9070) "janice"
> - Samsung Galaxy Xcover 2 (GT-S7710) "skomer"
>
> and a few others.
>
> Mainline Linux has great support for the Ux500 SoC, so these
> smartphones can also run Linux mainline quite well.
>
> Unfortunately, the original Samsung bootloader used on these devices
> has limitations that prevent booting Linux mainline directly.
> It keeps the L2 cache enabled, which causes Linux to crash very early,
> shortly after decompressing the kernel.
>
> Using U-Boot allows to circumvent these limitations. We can let the
> Samsung bootloader chain-load U-Boot and U-Boot locks the L2 cache
> before booting into Linux. U-Boot has several other advantages
> - it supports device-trees directly and we are no longer limited to
> flashing Android boot images through Samsung's proprietary download
> mode.
>
> The Samsung "stemmy" board covers all Samsung devices based on U8500.
> Add minimal support for "stemmy". For now only UART is supported but
> this will be extended later.
>
> Signed-off-by: Stephan Gerhold <stephan@gerhold.net>
> Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Applied to u-boot/master, thanks!
--
Tom
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next prev parent reply other threads:[~2020-01-23 21:58 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-04 17:45 [RFC PATCH 0/5] arm: Restore minimal support for ST-Ericsson U8500 SoC Stephan Gerhold
2020-01-04 17:45 ` [RFC PATCH 1/5] timer: Add driver for Nomadik Multi Timer Unit (MTU) Stephan Gerhold
2020-01-06 1:48 ` Linus Walleij
2020-01-23 21:58 ` Tom Rini
2020-01-04 17:45 ` [RFC PATCH 2/5] arm: dts: Import device tree for ST-Ericsson Ux500 Stephan Gerhold
2020-01-06 1:48 ` Linus Walleij
2020-01-23 21:58 ` Tom Rini
2020-01-04 17:45 ` [RFC PATCH 3/5] arm: Add support for ST-Ericsson U8500 SoC Stephan Gerhold
2020-01-06 1:49 ` Linus Walleij
2020-01-23 21:58 ` Tom Rini
2020-01-04 17:45 ` [RFC PATCH 4/5] MAINTAINERS: Add ARM U8500 Stephan Gerhold
2020-01-06 1:50 ` Linus Walleij
2020-01-23 21:58 ` Tom Rini
2020-01-04 17:45 ` [RFC PATCH 5/5] board: Add new Samsung "stemmy" board based on ST-Ericsson U8500 Stephan Gerhold
2020-01-06 1:50 ` Linus Walleij
2020-01-23 21:58 ` Tom Rini [this message]
2020-01-22 16:47 ` [RFC PATCH 0/5] arm: Restore minimal support for ST-Ericsson U8500 SoC Stephan Gerhold
2020-01-22 18:03 ` Tom Rini
2020-01-23 17:56 ` Stephan Gerhold
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