[U-Boot] [PATCH 12/18] arm: mx6: add support for Compulab cm-fx6 CoM

[Nikita Kiryanov <nikita@compulab.co.il>]

On 04/08/14 18:12, Marek Vasut wrote:
> On Monday, August 04, 2014 at 04:41:03 PM, Nikita Kiryanov wrote:
>> On 03/08/14 17:09, Marek Vasut wrote:
>>> On Sunday, August 03, 2014 at 09:34:42 AM, Nikita Kiryanov wrote:
>>>> Add initial support for Compulab CM-FX6 CoM.
>>>> Support includes MMC, SPI flash, and SPL with dynamic DRAM detection.
>>>>
>>>> Cc: Igor Grinberg <grinberg@compulab.co.il>
>>>> Cc: Stefano Babic <sbabic@denx.de>
>>>> Cc: Tom Rini <trini@ti.com>
>>>> Signed-off-by: Nikita Kiryanov <nikita@compulab.co.il>
>>>> ---
>>>>
>>>>    arch/arm/cpu/armv7/mx6/ddr.c       |   1 -
>>>>    board/compulab/cm_fx6/Makefile     |  12 ++
>>>>    board/compulab/cm_fx6/cm_fx6.c     | 108 ++++++++++
>>>>    board/compulab/cm_fx6/common.c     |  83 ++++++++
>>>>    board/compulab/cm_fx6/common.h     |  36 ++++
>>>>    board/compulab/cm_fx6/imximage.cfg |   8 +
>>>>    board/compulab/cm_fx6/spl.c        | 400
>>>>
>>>> +++++++++++++++++++++++++++++++++++++ boards.cfg
>>>> |
>>>>
>>>>     2 +
>>>>
>>>>    include/configs/cm_fx6.h           | 227 +++++++++++++++++++++
>>>>    9 files changed, 876 insertions(+), 1 deletion(-)
>>>>    create mode 100644 board/compulab/cm_fx6/Makefile
>>>>    create mode 100644 board/compulab/cm_fx6/cm_fx6.c
>>>>    create mode 100644 board/compulab/cm_fx6/common.c
>>>>    create mode 100644 board/compulab/cm_fx6/common.h
>>>>    create mode 100644 board/compulab/cm_fx6/imximage.cfg
>>>>    create mode 100644 board/compulab/cm_fx6/spl.c
>>>>    create mode 100644 include/configs/cm_fx6.h
>>>>
>>>> diff --git a/arch/arm/cpu/armv7/mx6/ddr.c b/arch/arm/cpu/armv7/mx6/ddr.c
>>>> index d3891dc..219263a 100644
>>>> --- a/arch/arm/cpu/armv7/mx6/ddr.c
>>>> +++ b/arch/arm/cpu/armv7/mx6/ddr.c
>>>> @@ -4,7 +4,6 @@
>>>>
>>>>     *
>>>>     * SPDX-License-Identifier:     GPL-2.0+
>>>>     */
>>>>
>>>> -
>>>>
>>>>    #include <common.h>
>>>>    #include <linux/types.h>
>>>>    #include <asm/arch/mx6-ddr.h>
>>>
>>> Drop this piece ;-)
>>
>> Yep...
>>
>>> [...]
>>>
>>>> +++ b/board/compulab/cm_fx6/cm_fx6.c
>>>
>>> [...]
>>>
>>>> +static ulong bank1_size;
>>>> +static ulong bank2_size;
>>>> +
>>>> +#define MMDC1_MDCTL 0x21B0000
>>>> +static int probe_mmdc_config(void)
>>>> +{
>>>> +	u32 val = readl(0x21B0000);
>>>> +	switch (val) {
>>>> +	case 0x83180000: /* DDR_16BIT_256MB */
>>>> +		gd->ram_size	= 0x10000000;
>>>> +		bank1_size	= 0x10000000;
>>>> +		bank2_size	= 0;
>>>> +		break;
>>>> +	case 0x83190000: /* DDR_32BIT_512MB */
>>>> +		gd->ram_size	= 0x20000000;
>>>> +		bank1_size	= 0x20000000;
>>>> +		bank2_size	= 0;
>>>> +		break;
>>>
>>> imx_ddr_size() won't cut it here ?
>>
>> It doesn't handle 4GB correctly (returns 0). I suppose
>> I can make a patch which caps the return value of
>> imx_ddr_size() for MX6 socs to 3840MB.
>> What do you think?
>
> That you should check the U-Boot ML, since that's what I did yesterday ;-) But
> still, this is rather sad practice -- instead of fixing a bug in code which you
> do know about, you implement such a workaround :-(

Actually, I only learned of this bug yesterday after you asked about
imx_ddr_size(). Glad to hear you already fixed it; I'll look at it for
the v2.