[U-Boot] [PATCH 3/6] ARM: socfpga: Add the configuration for FPGA SoCFPGA A10 SoCDK

[Marek Vasut]

On 1/1/19 4:32 AM, Chee, Tien Fong wrote:
> On Sun, 2018-12-30 at 16:47 +0100, Marek Vasut wrote:
>> On 12/30/18 9:13 AM, tien.fong.chee at intel.com wrote:
>>>
>>> From: Tien Fong Chee <tien.fong.chee at intel.com>
>>>
>>> Update the default configuration file to enable the necessary
>>> functionality
>>> to get the SoCFPGA loadfs driver support. This would enable the
>>> implementation of programming bitstream into FPGA from MMC.
>>>
>>> Signed-off-by: Tien Fong Chee <tien.fong.chee at intel.com>
>>> ---
>>>  configs/socfpga_arria10_defconfig |    8 ++++++++
>>>  1 files changed, 8 insertions(+), 0 deletions(-)
>>>
>>> diff --git a/configs/socfpga_arria10_defconfig
>>> b/configs/socfpga_arria10_defconfig
>>> index 6ebda81..8158dbb 100644
>>> --- a/configs/socfpga_arria10_defconfig
>>> +++ b/configs/socfpga_arria10_defconfig
>>> @@ -27,8 +27,16 @@ CONFIG_MTDIDS_DEFAULT="nor0=ff705000.spi.0"
>>>  # CONFIG_EFI_PARTITION is not set
>>>  CONFIG_DEFAULT_DEVICE_TREE="socfpga_arria10_socdk_sdmmc"
>>>  CONFIG_ENV_IS_IN_MMC=y
>>> +CONFIG_SPL_ENV_SUPPORT=y
>>>  CONFIG_SPL_DM=y
>>>  CONFIG_SPL_DM_SEQ_ALIAS=y
>>> +CONFIG_SPL_DM_MMC=y
>>> +CONFIG_SPL_MMC_SUPPORT=y
>>> +CONFIG_SPL_EXT_SUPPORT=y
>>> +CONFIG_SPL_FAT_SUPPORT=y
>>> +CONFIG_SPL_DRIVERS_MISC_SUPPORT=y
>>> +CONFIG_FS_FAT_MAX_CLUSTSIZE=16384
>> This breaks systems with large FAT clusters. Why is this needed for
>> programming the FPGA from MMC ?
> This is final tuning in term of getting balance between performance and
> SPL image size for the socdk devkit. User can change that if they need
> large FAT cluster in their design, right?

I think it'd rather make sense to fix the FAT driver to avoid statically
allocating those massive buffers for big clusters. I think that can be
done by allocating those on stack instead ... or mallocating them.

-- 
Best regards,
Marek Vasut