[Skiboot] [PATCH 2/3] Set occ functional field only when ibm, occ-functional-state property exist.

[Stewart Smith]

ppaidipe at linux.vnet.ibm.com writes:
> From: Pridhiviraj Paidipeddi <ppaidipe at linux.vnet.ibm.com>
>
> Currently chip->occ_functional data field set's to true always whether
> ibm,occ-functional-state property exists or not.
>
> ibm,occ-functional-state property of xscom node's are populated only in
> ibm,fsp systems by detecting the OCC state in OPAL/SPIRA. In non-fsp(i.e OpenPower)
> systems this property is not populating. But OPAL set's chip->occ_functional
> field incorrectly to true without acually knowing the occ state.
>
> So this patch set's chip->occ_functional data field to true only when property exist.
> By this way this field is set to false on simulation environments(where occ is
> not there) and BMC systems(where ibm,occ-functional-state property not exists).
>
> OCC Spec says:
> When OCC is told to go active it will populate OCC-OPAL shared memory interface
> with ‘valid’ and all Pstate data.
>
> So incase of OpenPower systems OPAL can add DT property ibm,occ-functional-state
> and set the chip->occ_functional data field to true in hw/occ.c when OPAL find's the
> valid homer region and corresponding occ_valid byte is set to 0x1
>
> Signed-off-by: Pridhiviraj Paidipeddi <ppaidipe at linux.vnet.ibm.com>
> ---
>  core/chip.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/core/chip.c b/core/chip.c
> index ea775ef..56b5063 100644
> --- a/core/chip.c
> +++ b/core/chip.c
> @@ -119,7 +119,7 @@ void init_chips(void)
>  						    0xffffffff);
>  		chip->pcid = dt_prop_get_u32_def(xn, "ibm,proc-chip-id",
>  						 0xffffffff);
> -		if (dt_prop_get_u32_def(xn, "ibm,occ-functional-state", 1))
> +		if (dt_prop_get_u32_def(xn, "ibm,occ-functional-state", 0))
>  			chip->occ_functional = true;
>  		else
>  			chip->occ_functional = false;
> -- 
> 2.7.4

I squashed this with the 3rd patch and merged to master as of
3cd459766a01c1cb8334f18e93a1c8eddfc6829c


-- 
Stewart Smith
OPAL Architect, IBM.