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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: Elaine Zhang <zhangqing@rock-chips.com>
[restructured error handling in subdomain-addition]
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
hifive-unleashed-5.1
Elaine Zhang 2016-03-10 05:22:55 +08:00 committed by Heiko Stuebner
parent 1fe767a56c
commit 6be05b5ec1
1 changed files with 63 additions and 0 deletions
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63
drivers/soc/rockchip/pm_domains.c
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@ -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) {