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soc: qcom: rpmpd: Add parent PD support 

In some cases (like with the GPU core clock on GMU-less SoCs) it's
required that we scale more than one voltage domain. This can be achieved
by linking them in a parent-child relationship. Add support for specifying
a parent PD, similarly to what has been done in the RPMhPD driver.

Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230313-topic-rpmpd-v3-8-06a4f448ff90@linaro.org
This commit is contained in:
Konrad Dybcio 2023-03-13 21:00:06 +01:00 committed by Bjorn Andersson
parent d338fe40cf
commit decd6e77e0
1 changed files with 10 additions and 0 deletions
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10
drivers/soc/qcom/rpmpd.c
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@ -48,6 +48,7 @@ struct rpmpd_req {
struct rpmpd {
struct generic_pm_domain pd;
struct generic_pm_domain *parent;
struct rpmpd *peer;
const bool active_only;
unsigned int corner;
@ -969,6 +970,15 @@ static int rpmpd_probe(struct platform_device *pdev)
data->domains[i] = &rpmpds[i]->pd;
}
/* Add subdomains */
for (i = 0; i < num; i++) {
if (!rpmpds[i])
continue;
if (rpmpds[i]->parent)
pm_genpd_add_subdomain(rpmpds[i]->parent, &rpmpds[i]->pd);
}
return of_genpd_add_provider_onecell(pdev->dev.of_node, data);
}