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

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Date:   Mon, 11 Apr 2022 15:30:38 +0200
From:   Johan Hovold <johan@...nel.org>
To:     Bjorn Andersson <bjorn.andersson@...aro.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 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.

> 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.

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

> +
> +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