[U-Boot] [PATCH] arm: socfpga: set the fpga global bit to disable HPS to FPGA signals

[Dinh Nguyen <dinguyen@kernel.org>]

On 01/06/2016 09:20 PM, Marek Vasut wrote:
> On Thursday, January 07, 2016 at 03:50:00 AM, Dinh Nguyen wrote:
>> On 01/06/2016 08:21 PM, Marek Vasut wrote:
>>> On Wednesday, January 06, 2016 at 08:48:43 PM,
>>> dinguyen at opensource.altera.com
>>>
>>> wrote:
>>>> From: Dinh Nguyen <dinh.linux@gmail.com>
>>>>
>>>> We should be setting the FPGA Interface Group global bit that will
>>>> correctly disable all interfaces between the FPGA and HPS.
>>>>
>>>> Signed-off-by: Dinh Nguyen <dinguyen@opensource.altera.com>
>>>> ---
>>>>
>>>>  drivers/fpga/socfpga.c | 2 +-
>>>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>>>
>>>> diff --git a/drivers/fpga/socfpga.c b/drivers/fpga/socfpga.c
>>>> index 4448250..431e159 100644
>>>> --- a/drivers/fpga/socfpga.c
>>>> +++ b/drivers/fpga/socfpga.c
>>>> @@ -269,7 +269,7 @@ int socfpga_load(Altera_desc *desc, const void
>>>> *rbf_data, size_t rbf_size) /* Prior programming the FPGA, all bridges
>>>> need to be shut off */
>>>>
>>>>  	/* Disable all signals from hps peripheral controller to fpga */
>>>>
>>>> -	writel(0, &sysmgr_regs->fpgaintfgrp_module);
>>>> +	writel(0, &sysmgr_regs->fpgaintfgrp_gbl);
>>>>
>>>>  	/* Disable all signals from FPGA to HPS SDRAM */
>>>>  
>>>>  #define SDR_CTRLGRP_FPGAPORTRST_ADDRESS	0x5080
>>>
>>> Looks fine,
>>>
>>> Acked-by: Marek Vasut <marex@denx.de>
>>>
>>> btw Shouldn't you also fix the same thing in drivers/fpga/socfpga.c ?
>>> Even
>>
>> I'm confused by what you mean here. The patch is for
>> drivers/fpga/socfpga.c.
> 
> Oops, sorry, there is another one in arch/arm/mach-socfpga/misc.c . I mispasted
> the wrong filename.
> 

Ah yes, then we should probably add a function to enable/disable the
interfaces.

Dinh