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Commit 6be05b5e authored by Elaine Zhang's avatar Elaine Zhang Committed by Heiko Stuebner
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soc: rockchip: power-domain: add support for sub-power domains 



This patch adds support for making one power domain a sub-domain of
other domain. This is useful for modeling power dependences,
which needs to have more than one power domain enabled to be operational.

Signed-off-by: default avatarElaine Zhang <zhangqing@rock-chips.com>
[restructured error handling in subdomain-addition]
Signed-off-by: default avatarHeiko Stuebner <heiko@sntech.de>
parent 1fe767a5

drivers/soc/rockchip/pm_domains.c

+63 −0
Original line number Diff line number Diff line
@@ -370,6 +370,61 @@ static void rockchip_configure_pd_cnt(struct rockchip_pmu *pmu, 
	regmap_write(pmu->regmap, domain_reg_offset + 4, count);

}



static int rockchip_pm_add_subdomain(struct rockchip_pmu *pmu,

				     struct device_node *parent)

{

	struct device_node *np;

	struct generic_pm_domain *child_domain, *parent_domain;

	int error;



	for_each_child_of_node(parent, np) {

		u32 idx;



		error = of_property_read_u32(parent, "reg", &idx);

		if (error) {

			dev_err(pmu->dev,

				"%s: failed to retrieve domain id (reg): %d\n",

				parent->name, error);

			goto err_out;

		}

		parent_domain = pmu->genpd_data.domains[idx];



		error = rockchip_pm_add_one_domain(pmu, np);

		if (error) {

			dev_err(pmu->dev, "failed to handle node %s: %d\n",

				np->name, error);

			goto err_out;

		}



		error = of_property_read_u32(np, "reg", &idx);

		if (error) {

			dev_err(pmu->dev,

				"%s: failed to retrieve domain id (reg): %d\n",

				np->name, error);

			goto err_out;

		}

		child_domain = pmu->genpd_data.domains[idx];



		error = pm_genpd_add_subdomain(parent_domain, child_domain);

		if (error) {

			dev_err(pmu->dev, "%s failed to add subdomain %s: %d\n",

				parent_domain->name, child_domain->name, error);

			goto err_out;

		} else {

			dev_dbg(pmu->dev, "%s add subdomain: %s\n",

				parent_domain->name, child_domain->name);

		}



		rockchip_pm_add_subdomain(pmu, np);

	}



	return 0;



err_out:

	of_node_put(np);

	return error;

}



static int rockchip_pm_domain_probe(struct platform_device *pdev)

{

	struct device *dev = &pdev->dev;
@@ -436,6 +491,14 @@ static int rockchip_pm_domain_probe(struct platform_device *pdev) 
			of_node_put(node);

			goto err_out;

		}



		error = rockchip_pm_add_subdomain(pmu, node);

		if (error < 0) {

			dev_err(dev, "failed to handle subdomain node %s: %d\n",

				node->name, error);

			of_node_put(node);

			goto err_out;

		}

	}



	if (error) {