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soc: samsung: pm_domains: Read domain name from the new label property

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Device tree nodes for each power domain should use generic "power-domain"
name, so using it as a domain name doesn't give much benefits. This patch
adds support for human readable names defined in 'label' property. Such
names are visible to userspace and makes debugging much easier. When no
'label' property is found, driver keeps using the name constructed from
full node name.

Suggested-by: Krzysztof Kozlowski <[email protected]>
Signed-off-by: Marek Szyprowski <[email protected]>
Signed-off-by: Krzysztof Kozlowski <[email protected]>
This commit is contained in:
Marek Szyprowski 2017-01-30 13:18:59 +01:00 • committed by Krzysztof Kozlowski
commit b13b2330aa
2 changed files with 14 additions and 2 deletions
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12
drivers/soc/samsung/pm_domains.c
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@ -135,6 +135,15 @@ static const struct of_device_id exynos_pm_domain_of_match[] __initconst = {
{ },
};
static __init const char *exynos_get_domain_name(struct device_node *node)
{
const char *name;
if (of_property_read_string(node, "label", &name) < 0)
name = strrchr(node->full_name, '/') + 1;
return kstrdup_const(name, GFP_KERNEL);
}
static __init int exynos4_pm_init_power_domain(void)
{
struct device_node *np;
@ -152,8 +161,7 @@ static __init int exynos4_pm_init_power_domain(void)
of_node_put(np);
return -ENOMEM;
}
pd->pd.name = kstrdup_const(strrchr(np->full_name, '/') + 1,
GFP_KERNEL);
pd->pd.name = exynos_get_domain_name(np);
if (!pd->pd.name) {
kfree(pd);
of_node_put(np);