linux-kernel - Re: [RESEND 2/2] soc: qcom: rpmhpd: add sc8280xp rpmh power-domains

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Date:   Tue, 12 Apr 2022 10:16:10 -0500
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Johan Hovold <johan@...nel.org>
Cc:     Rajendra Nayak <rnayak@...eaurora.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [RESEND 2/2] soc: qcom: rpmhpd: add sc8280xp rpmh power-domains

On Mon 11 Apr 08:30 CDT 2022, Johan Hovold wrote:

> On Thu, Feb 24, 2022 at 09:43:45PM -0800, Bjorn Andersson wrote:
> > The Qualcomm sc8280xp platform has 8 power-domains. Add these, and their
> > relevant active-only variants, to the RPMh power-domain driver.
> 
> As we discussed off-list, the sc8280xp apparently has 13 domains. Guess
> the commit message should be updated even if you don't expose all of
> these to Linux.
> 

Thanks for spotting that, I will update the patch and rewrite the commit
message accordingly.

> > Signed-off-by: Bjorn Andersson <bjorn.andersson@...aro.org>
> > ---
> >  drivers/soc/qcom/rpmhpd.c | 26 ++++++++++++++++++++++++++
> >  1 file changed, 26 insertions(+)
> > 
> > diff --git a/drivers/soc/qcom/rpmhpd.c b/drivers/soc/qcom/rpmhpd.c
> > index 58f1dc9b9cb7..71602eb824f7 100644
> > --- a/drivers/soc/qcom/rpmhpd.c
> > +++ b/drivers/soc/qcom/rpmhpd.c
> > @@ -180,6 +180,11 @@ static struct rpmhpd mxc_ao = {
> >  	.res_name = "mxc.lvl",
> >  };
> >  
> > +static struct rpmhpd nsp = {
> > +	.pd = { .name = "nsp", },
> > +	.res_name = "nsp.lvl",
> > +};
> > +
> >  /* SDM845 RPMH powerdomains */
> >  static struct rpmhpd *sdm845_rpmhpds[] = {
> >  	[SDM845_CX] = &cx_w_mx_parent,
> > @@ -363,10 +368,31 @@ static const struct rpmhpd_desc sc8180x_desc = {
> >  	.num_pds = ARRAY_SIZE(sc8180x_rpmhpds),
> >  };
> >  
> > +/* SC8280xp RPMH powerdomains */
> > +static struct rpmhpd *sc8280xp_rpmhpds[] = {
> > +	[SC8280XP_CX] = &cx,
> > +	[SC8280XP_CX_AO] = &cx_ao,
> > +	[SC8280XP_MX] = &mx,
> > +	[SC8280XP_MX_AO] = &mx_ao,
> > +	[SC8280XP_EBI] = &ebi,
> > +	[SC8280XP_LCX] = &lcx,
> > +	[SC8280XP_LMX] = &lmx,
> > +	[SC8280XP_GFX] = &gfx,
> > +	[SC8280XP_MMCX] = &mmcx,
> > +	[SC8280XP_MMCX_AO] = &mmcx_ao,
> > +	[SC8280XP_NSP] = &nsp,
> > +};
> 
> Commit 90c74c1c2574 ("soc: qcom: rpmhpd: Sort power-domain definitions
> and lists") recently sorted the other arrays. Sorting by address like
> you've implicitly done here makes it easy to compare with the firmware
> interface, but perhaps you want to sort alphabetically for consistency.
> 

I like consistency.

> Since there apparently are no users for active-only domains in the tree,
> perhaps they can also be added later.
> 

I'll take an extra look at this as well. Seems we do cx, mx and mmcx ao
on the other platforms, but question is if that's only because we do it
on previous platforms...

Thanks for the review,
Bjorn

> > +
> > +static const struct rpmhpd_desc sc8280xp_desc = {
> > +	.rpmhpds = sc8280xp_rpmhpds,
> > +	.num_pds = ARRAY_SIZE(sc8280xp_rpmhpds),
> > +};
> > +
> >  static const struct of_device_id rpmhpd_match_table[] = {
> >  	{ .compatible = "qcom,sc7180-rpmhpd", .data = &sc7180_desc },
> >  	{ .compatible = "qcom,sc7280-rpmhpd", .data = &sc7280_desc },
> >  	{ .compatible = "qcom,sc8180x-rpmhpd", .data = &sc8180x_desc },
> > +	{ .compatible = "qcom,sc8280xp-rpmhpd", .data = &sc8280xp_desc },
> >  	{ .compatible = "qcom,sdm845-rpmhpd", .data = &sdm845_desc },
> >  	{ .compatible = "qcom,sdx55-rpmhpd", .data = &sdx55_desc},
> >  	{ .compatible = "qcom,sm6350-rpmhpd", .data = &sm6350_desc },
> 
> Johan