Merge tag 'samsung-drivers-soc-pm-domains-4.11' of... (28eedd15) · Commits · 戴 / test

Documentation/devicetree/bindings/power/pd-samsung.txt

+4 −0

Original line number	Diff line number	Diff line
		@@ -13,6 +13,8 @@ Required Properties:
		must be 0.

		Optional Properties:
		- label: Human readable string with domain name. Will be visible in userspace
		to let user to distinguish between multiple domains in SoC.
		- clocks: List of clock handles. The parent clocks of the input clocks to the
		devices in this power domain are set to oscclk before power gating
		and restored back after powering on a domain. This is required for
		@@ -39,6 +41,7 @@ Example:
		compatible = "samsung,exynos4210-pd";
		reg = <0x10023C00 0x10>;
		#power-domain-cells = <0>;
		label = "LCD0";
		};

		mfc_pd: power-domain@10044060 {
		@@ -47,6 +50,7 @@ Example:
		clocks = <&clock CLK_FIN_PLL>, <&clock CLK_MOUT_USER_ACLK333>;
		clock-names = "oscclk", "clk0";
		#power-domain-cells = <0>;
		label = "MFC";
		};

		See Documentation/devicetree/bindings/power/power_domain.txt for description

drivers/soc/samsung/pm_domains.c

+14 −10

Original line number	Diff line number	Diff line
		@@ -35,7 +35,6 @@ struct exynos_pm_domain_config {
		*/
		struct exynos_pm_domain {
		void __iomem *base;
		char const *name;
		bool is_off;
		struct generic_pm_domain pd;
		struct clk *oscclk;
		@@ -70,7 +69,7 @@ static int exynos_pd_power(struct generic_pm_domain *domain, bool power_on)
		pd->pclk[i] = clk_get_parent(pd->clk[i]);
		if (clk_set_parent(pd->clk[i], pd->oscclk))
		pr_err("%s: error setting oscclk as parent to clock %d\n",
		pd->name, i);
		domain->name, i);
		}
		}

		@@ -101,7 +100,7 @@ static int exynos_pd_power(struct generic_pm_domain *domain, bool power_on)
		continue; /* Skip on first power up */
		if (clk_set_parent(pd->clk[i], pd->pclk[i]))
		pr_err("%s: error setting parent to clock%d\n",
		pd->name, i);
		domain->name, i);
		}
		}

		@@ -143,6 +142,15 @@ 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;
		@@ -157,20 +165,16 @@ static __init int exynos4_pm_init_power_domain(void)

		pd = kzalloc(sizeof(*pd), GFP_KERNEL);
		if (!pd) {
		pr_err("%s: failed to allocate memory for domain\n",
		__func__);
		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);
		return -ENOMEM;
		}

		pd->name = pd->pd.name;
		pd->base = of_iomap(np, 0);
		if (!pd->base) {
		pr_warn("%s: failed to map memory\n", __func__);
		@@ -234,10 +238,10 @@ no_clk:

		if (of_genpd_add_subdomain(&parent, &child))
		pr_warn("%s failed to add subdomain: %s\n",
		parent.np->name, child.np->name);
		parent.np->full_name, child.np->full_name);
		else
		pr_info("%s has as child subdomain: %s.\n",
		parent.np->name, child.np->name);
		parent.np->full_name, child.np->full_name);
		}

		return 0;

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