soc: qcom: rpmhpd: Mark mx as a parent for cx

Specify the active + sleep and active-only MX power domains as
the parents of the corresponding CX power domains. This will ensure that
performance state requests on CX automatically generate equivalent requests
on MX power domains.

This is used to enforce a requirement that exists for various
hardware blocks on SDM845 that MX performance state >= CX performance
state for a given operating frequency.

Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Rajendra Nayak <rnayak@codeaurora.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Andy Gross <andy.gross@linaro.org>

diff --git a/drivers/soc/qcom/rpmhpd.c b/drivers/soc/qcom/rpmhpd.c
index d3f819c1a90c1eb1f3a412efec65c7c4856e8f8f..5741ec3fa814c227a76cb2bd3ff407c7ede31a9b 100644 (file)
--- a/drivers/soc/qcom/rpmhpd.c
+++ b/drivers/soc/qcom/rpmhpd.c
@@ -101,12 +101,14 @@ static struct rpmhpd sdm845_cx_ao;
 static struct rpmhpd sdm845_cx = {
        .pd = { .name = "cx", },
        .peer = &sdm845_cx_ao,
+       .parent = &sdm845_mx.pd,
        .res_name = "cx.lvl",
 };
 
 static struct rpmhpd sdm845_cx_ao = {
        .pd = { .name = "cx_ao", },
        .peer = &sdm845_cx,
+       .parent = &sdm845_mx_ao.pd,
        .res_name = "cx.lvl",
 };
 
@@ -376,6 +378,15 @@ static int rpmhpd_probe(struct platform_device *pdev)
                data->domains[i] = &rpmhpds[i]->pd;
        }
 
+       /* Add subdomains */
+       for (i = 0; i < num_pds; i++) {
+               if (!rpmhpds[i])
+                       continue;
+               if (rpmhpds[i]->parent)
+                       pm_genpd_add_subdomain(rpmhpds[i]->parent,
+                                              &rpmhpds[i]->pd);
+       }
+
        return of_genpd_add_provider_onecell(pdev->dev.of_node, data);
 }