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| author | Masahiro Yamada <yamada.masahiro@socionext.com> | 2016-06-17 19:24:29 +0900 |
|---|---|---|
| committer | Masahiro Yamada <yamada.masahiro@socionext.com> | 2016-06-20 07:15:33 +0900 |
| commit | 51ea5a060d7bb187d344c9d24b9bfdc7570681df (patch) | |
| tree | 9596c55a4a74e9b139dbc6d01d5d2d609b7267a1 /arch/arm/mach-uniphier/Kconfig | |
| parent | 18c11986674ae917aad2465ef88cbb2c4e92b170 (diff) | |
| download | talos-obmc-uboot-51ea5a060d7bb187d344c9d24b9bfdc7570681df.tar.gz talos-obmc-uboot-51ea5a060d7bb187d344c9d24b9bfdc7570681df.zip | |
ARM: uniphier: reserve memory for DRAM PHY training on PH1-LD20
The DRAM PHY layer on PH1-LD20 is able to calibrate PHY parameters
periodically. This compensates for the voltage and temperature
deviation and improves the PHY parameter adjustment. Instead, it
requires 64 byte scratch memory in each DRAM channel for the dynamic
training. The memory regions must be reserved in DT before jumping
to the kernel.
The scratch area can be anywhere in each DRAM channel, but the DRAM
init code in SPL currently assigns it at the end of each channel.
So, it makes sense to reserve the regions on run-time by U-Boot
instead of statically embedding it in the DT in Linux. Anyway,
a boot-loader should know much more about memory initialization
than the kernel.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Diffstat (limited to 'arch/arm/mach-uniphier/Kconfig')
| -rw-r--r-- | arch/arm/mach-uniphier/Kconfig | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arm/mach-uniphier/Kconfig b/arch/arm/mach-uniphier/Kconfig index 89be0b3bd7..e256eeb668 100644 --- a/arch/arm/mach-uniphier/Kconfig +++ b/arch/arm/mach-uniphier/Kconfig @@ -40,6 +40,7 @@ config ARCH_UNIPHIER_LD11 config ARCH_UNIPHIER_LD20 bool "UniPhier PH1-LD20 SoC" select ARCH_UNIPHIER_64BIT + select OF_BOARD_SETUP endchoice |
