These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / arch / arm / mach-exynos / pm_domains.c

diff --git a/kernel/arch/arm/mach-exynos/pm_domains.c b/kernel/arch/arm/mach-exynos/pm_domains.c
index a968653..7c21760 100644 (file)
--- a/kernel/arch/arm/mach-exynos/pm_domains.c
+++ b/kernel/arch/arm/mach-exynos/pm_domains.c
@@ -62,6 +62,7 @@ static int exynos_pd_power(struct generic_pm_domain *domain, bool power_on)
                for (i = 0; i < MAX_CLK_PER_DOMAIN; i++) {
                        if (IS_ERR(pd->clk[i]))
                                break;
+                       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);
@@ -90,6 +91,9 @@ static int exynos_pd_power(struct generic_pm_domain *domain, bool power_on)
                for (i = 0; i < MAX_CLK_PER_DOMAIN; i++) {
                        if (IS_ERR(pd->clk[i]))
                                break;
+
+                       if (IS_ERR(pd->clk[i]))
+                               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);
@@ -117,27 +121,36 @@ static int exynos_pd_power_off(struct generic_pm_domain *domain)
 
 static __init int exynos4_pm_init_power_domain(void)
 {
-       struct platform_device *pdev;
        struct device_node *np;
 
        for_each_compatible_node(np, NULL, "samsung,exynos4210-pd") {
                struct exynos_pm_domain *pd;
                int on, i;
-               struct device *dev;
-
-               pdev = of_find_device_by_node(np);
-               dev = &pdev->dev;
 
                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);
+               if (!pd->pd.name) {
+                       kfree(pd);
+                       of_node_put(np);
                        return -ENOMEM;
                }
 
-               pd->pd.name = kstrdup(dev_name(dev), GFP_KERNEL);
                pd->name = pd->pd.name;
                pd->base = of_iomap(np, 0);
+               if (!pd->base) {
+                       pr_warn("%s: failed to map memory\n", __func__);
+                       kfree_const(pd->pd.name);
+                       kfree(pd);
+                       continue;
+               }
+
                pd->pd.power_off = exynos_pd_power_off;
                pd->pd.power_on = exynos_pd_power_on;
 
@@ -145,12 +158,12 @@ static __init int exynos4_pm_init_power_domain(void)
                        char clk_name[8];
 
                        snprintf(clk_name, sizeof(clk_name), "asb%d", i);
-                       pd->asb_clk[i] = clk_get(dev, clk_name);
+                       pd->asb_clk[i] = of_clk_get_by_name(np, clk_name);
                        if (IS_ERR(pd->asb_clk[i]))
                                break;
                }
 
-               pd->oscclk = clk_get(dev, "oscclk");
+               pd->oscclk = of_clk_get_by_name(np, "oscclk");
                if (IS_ERR(pd->oscclk))
                        goto no_clk;
 
@@ -158,16 +171,14 @@ static __init int exynos4_pm_init_power_domain(void)
                        char clk_name[8];
 
                        snprintf(clk_name, sizeof(clk_name), "clk%d", i);
-                       pd->clk[i] = clk_get(dev, clk_name);
+                       pd->clk[i] = of_clk_get_by_name(np, clk_name);
                        if (IS_ERR(pd->clk[i]))
                                break;
-                       snprintf(clk_name, sizeof(clk_name), "pclk%d", i);
-                       pd->pclk[i] = clk_get(dev, clk_name);
-                       if (IS_ERR(pd->pclk[i])) {
-                               clk_put(pd->clk[i]);
-                               pd->clk[i] = ERR_PTR(-EINVAL);
-                               break;
-                       }
+                       /*
+                        * Skip setting parent on first power up.
+                        * The parent at this time may not be useful at all.
+                        */
+                       pd->pclk[i] = ERR_PTR(-EINVAL);
                }
 
                if (IS_ERR(pd->clk[0]))
@@ -205,9 +216,8 @@ no_clk:
                else
                        pr_info("%s has as child subdomain: %s.\n",
                                parent_domain->name, child_domain->name);
-               of_node_put(np);
        }
 
        return 0;
 }
-arch_initcall(exynos4_pm_init_power_domain);
+core_initcall(exynos4_pm_init_power_domain);