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

[Marek Vasut]

On Thursday, January 07, 2016 at 04:03:02 PM, Dinh Nguyen wrote:
> 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 at 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 at 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 at 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.

Yes, it might make sense to unify the code a bit.

Best regards,
Marek Vasut