clk: qcom: common: Add support for power-domain attachment

Right now we support one power-domain per clock controller.
These single power-domains are switched on by the driver platform logic.

However when we have multiple power-domains attached to a clock-controller
that list of power-domains must be handled outside of driver platform
logic.

Use devm_pm_domain_attach_list() to automatically hook the list of given
power-domains in the dtsi for the clock-controller driver.

Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Reviewed-by: Vladimir Zapolskiy <vladimir.zapolskiy@linaro.org>
Link: https://lore.kernel.org/r/20250117-b4-linux-next-24-11-18-clock-multiple-power-domains-v10-3-13f2bb656dad@linaro.org
Signed-off-by: Bjorn Andersson <andersson@kernel.org>

diff --git a/drivers/clk/qcom/common.c b/drivers/clk/qcom/common.c
index 33cc1f73c69d1f875a193aea0552902268dc8716..b79e6a73b53a4113ca324d102d7be5504a9fe85e 100644 (file)
--- a/drivers/clk/qcom/common.c
+++ b/drivers/clk/qcom/common.c
@@ -22,6 +22,7 @@ struct qcom_cc {
        struct qcom_reset_controller reset;
        struct clk_regmap **rclks;
        size_t num_rclks;
+       struct dev_pm_domain_list *pd_list;
 };
 
 const
@@ -299,6 +300,10 @@ int qcom_cc_really_probe(struct device *dev,
        if (!cc)
                return -ENOMEM;
 
+       ret = devm_pm_domain_attach_list(dev, NULL, &cc->pd_list);
+       if (ret < 0 && ret != -EEXIST)
+               return ret;
+
        reset = &cc->reset;
        reset->rcdev.of_node = dev->of_node;
        reset->rcdev.ops = &qcom_reset_ops;