[PATCH v2 3/3] ARM i.MX50: Add support for i.MX50 based Amazon Kindle e-book readers

[Sascha Hauer]

Hi Alexander,

On Sun, Apr 23, 2017 at 07:37:41PM +0200, Alexander Kurz wrote:
> The Kindle Model No. D01100 (Kindle Wi-Fi), D01200 (Kindle Touch)
> and EY21 (Kindle Paperwhite) are refered as the Kindle 4th and 5th generation.
> Those models are based on an i.MX50 SoC and use LPDDR1 or LPDDR2 Memory.
> 
> The devices boot in internal boot mode from a build-in eMMC, alternatively
> some devices may be set into USB-downloader mode by pressing a specific key
> at startup.
> 
> Add support for the i.MX50 based Kindle device and make barebox a drop-in
> replacement for the factory shipped u-boot image.
> 
> Notable features:
> - Support for eMMC, USB, UART, I2C, SPI and Keys (except keyboard).
> - LPDDR1 and LPDDR2 setup is done via DCD, the same imximage may be used
>   for USB-startup and for installation.
> - Support for vendor specific ATAGs that are required for the Kindle-System.
> - usbserial barebox console access by pressing Select button at startup,
>   alternatively full console support on connector J14.
> 
> Signed-off-by: Alexander Kurz <akurz at blala.de>
> diff --git a/arch/arm/boards/kindle-mx50/defaultenv-kindle-mx50/nv/autoboot_timeout b/arch/arm/boards/kindle-mx50/defaultenv-kindle-mx50/nv/autoboot_timeout
> new file mode 100644
> index 0000000..00750ed
> --- /dev/null
> +++ b/arch/arm/boards/kindle-mx50/defaultenv-kindle-mx50/nv/autoboot_timeout
> @@ -0,0 +1 @@
> +3
> diff --git a/arch/arm/boards/kindle-mx50/defaultenv-kindle-mx50/nv/boot.default b/arch/arm/boards/kindle-mx50/defaultenv-kindle-mx50/nv/boot.default
> new file mode 100644
> index 0000000..3118b7a
> --- /dev/null
> +++ b/arch/arm/boards/kindle-mx50/defaultenv-kindle-mx50/nv/boot.default
> @@ -0,0 +1 @@
> +mmc_kernel
> diff --git a/arch/arm/boards/kindle-mx50/defaultenv-kindle-mx50/nv/linux.bootargs.console b/arch/arm/boards/kindle-mx50/defaultenv-kindle-mx50/nv/linux.bootargs.console
> new file mode 100644
> index 0000000..d775310
> --- /dev/null
> +++ b/arch/arm/boards/kindle-mx50/defaultenv-kindle-mx50/nv/linux.bootargs.console
> @@ -0,0 +1 @@
> +console=ttymxc0,115200

This shouldn't be needed. barebox will automatically add
console=ttymxc0,115200 to the kernel command line when
this UART is used as console in barebox.

> diff --git a/arch/arm/boards/kindle-mx50/defaultenv-kindle-mx50/nv/linux.bootargs.consoleblank b/arch/arm/boards/kindle-mx50/defaultenv-kindle-mx50/nv/linux.bootargs.consoleblank
> new file mode 100644
> index 0000000..573541a
> --- /dev/null
> +++ b/arch/arm/boards/kindle-mx50/defaultenv-kindle-mx50/nv/linux.bootargs.consoleblank
> @@ -0,0 +1 @@
> +0

This results in "0" being passed to the kernel command line. You
probably want to have "consoleblank=0", right?

I applied the series with these two things fixed. Is that ok for you?

Sascha


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