[PATCH] ARM: socfpga: Configure l2c_aux_val

[Dinh Nguyen]

On 01/09/2018 11:25 AM, thor.thayer at linux.intel.com wrote:
> From: Thor Thayer <thor.thayer at linux.intel.com>
> 
> Depending on the execution path, the A10 boot ROM/U-Boot may or
> may not set some bits in the l2c aux ctrl register.  Due to this
> abiguity, linux must explicitly set the register.  This patch
> forces the configuration to match the full boot flow, which
> also matches the setting used in the 3.10-ltsi version of the
> kernel.
> 
> Signed-off-by: Matthew Gerlach <matthew.gerlach at linux.intel.com>
> Signed-off-by: Thor Thayer <thor.thayer at linux.intel.com>
> ---
>  arch/arm/mach-socfpga/socfpga.c | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/arm/mach-socfpga/socfpga.c b/arch/arm/mach-socfpga/socfpga.c
> index dde14f7bf2c3..37d28794f7d4 100644
> --- a/arch/arm/mach-socfpga/socfpga.c
> +++ b/arch/arm/mach-socfpga/socfpga.c
> @@ -121,7 +121,10 @@ static const char *altera_a10_dt_match[] = {
>  };
>  
>  DT_MACHINE_START(SOCFPGA_A10, "Altera SOCFPGA Arria10")
> -	.l2c_aux_val	= 0,
> +	.l2c_aux_val	= L2C_AUX_CTRL_EVTMON_ENABLE |
> +			  L2C_AUX_CTRL_SHARED_OVERRIDE |
> +			  L310_AUX_CTRL_INSTR_PREFETCH |
> +			  L310_AUX_CTRL_DATA_PREFETCH,

The override bit already getting set in socfpga_arria10.dtsi. If you
want the data/instr prefetch bits, then please add them to the dtsi.

Thanks,
Dinh