clk: samsung: exynos5250: Move suspend/resume handling to SoC driver

Since there are multiple differences in how suspend/resume of particular
Exynos SoCs must be handled, SoC driver is better place for
suspend/resume handlers and so this patch moves them.

Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Reviewed-by: Thomas Abraham <thomas.ab@samsung.com>
Reviewed-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

3 files changed, 49 insertions, 9 deletions

diff --git a/drivers/clk/samsung/clk-exynos5250.c b/drivers/clk/samsung/clk-exynos5250.c
index ff4beebe1f0b..b3cccf044607 100644
--- a/drivers/clk/samsung/clk-exynos5250.c
+++ b/drivers/clk/samsung/clk-exynos5250.c
@@ -16,6 +16,7 @@
 #include <linux/clk-provider.h>
 #include <linux/of.h>
 #include <linux/of_address.h>
+#include <linux/syscore_ops.h>
 
 #include "clk.h"
 
@@ -85,6 +86,11 @@ enum exynos5250_plls {
         nr_plls                 /* number of PLLs */
 };
 
+static void __iomem *reg_base;
+
+#ifdef CONFIG_PM_SLEEP
+static struct samsung_clk_reg_dump *exynos5250_save;
+
 /*
  * list of controller registers to be saved and restored during a
  * suspend/resume cycle.
@@ -137,6 +143,41 @@ static unsigned long exynos5250_clk_regs[] __initdata = {
         GATE_IP_ACP,
 };
 
+static int exynos5250_clk_suspend(void)
+{
+        samsung_clk_save(reg_base, exynos5250_save,
+                                ARRAY_SIZE(exynos5250_clk_regs));
+
+        return 0;
+}
+
+static void exynos5250_clk_resume(void)
+{
+        samsung_clk_restore(reg_base, exynos5250_save,
+                                ARRAY_SIZE(exynos5250_clk_regs));
+}
+
+static struct syscore_ops exynos5250_clk_syscore_ops = {
+        .suspend = exynos5250_clk_suspend,
+        .resume = exynos5250_clk_resume,
+};
+
+static void exynos5250_clk_sleep_init(void)
+{
+        exynos5250_save = samsung_clk_alloc_reg_dump(exynos5250_clk_regs,
+                                        ARRAY_SIZE(exynos5250_clk_regs));
+        if (!exynos5250_save) {
+                pr_warn("%s: failed to allocate sleep save data, no sleep support!\n",
+                        __func__);
+                return;
+        }
+
+        register_syscore_ops(&exynos5250_clk_syscore_ops);
+}
+#else
+static void exynos5250_clk_sleep_init(void) {}
+#endif
+
 /* list of all parent clock list */
 PNAME(mout_apll_p)      = { "fin_pll", "fout_apll", };
 PNAME(mout_cpu_p)       = { "mout_apll", "mout_mpll", };
@@ -645,8 +686,6 @@ static struct of_device_id ext_clk_match[] __initdata = {
 /* register exynox5250 clocks */
 static void __init exynos5250_clk_init(struct device_node *np)
 {
-        void __iomem *reg_base;
-
         if (np) {
                 reg_base = of_iomap(np, 0);
                 if (!reg_base)
@@ -655,9 +694,7 @@ static void __init exynos5250_clk_init(struct device_node *np)
                 panic("%s: unable to determine soc\n", __func__);
         }
 
-        samsung_clk_init(np, reg_base, CLK_NR_CLKS,
-                        exynos5250_clk_regs, ARRAY_SIZE(exynos5250_clk_regs),
-                        NULL, 0);
+        samsung_clk_init(np, reg_base, CLK_NR_CLKS, NULL, 0, NULL, 0);
         samsung_clk_of_register_fixed_ext(exynos5250_fixed_rate_ext_clks,
                         ARRAY_SIZE(exynos5250_fixed_rate_ext_clks),
                         ext_clk_match);
@@ -685,6 +722,8 @@ static void __init exynos5250_clk_init(struct device_node *np)
         samsung_clk_register_gate(exynos5250_gate_clks,
                         ARRAY_SIZE(exynos5250_gate_clks));
 
+        exynos5250_clk_sleep_init();
+
         pr_info("Exynos5250: clock setup completed, armclk=%ld\n",
                         _get_rate("div_arm2"));
 }
diff --git a/drivers/clk/samsung/clk.c b/drivers/clk/samsung/clk.c
index c0a716b94a66..ec761e344fd0 100644
--- a/drivers/clk/samsung/clk.c
+++ b/drivers/clk/samsung/clk.c
@@ -38,8 +38,9 @@ void samsung_clk_restore(void __iomem *base,
                 writel(rd->value, base + rd->offset);
 }
 
-struct samsung_clk_reg_dump *samsung_clk_alloc_reg_dump(unsigned long *rdump,
-                                                        unsigned long nr_rdump)
+struct samsung_clk_reg_dump *samsung_clk_alloc_reg_dump(
+                                                const unsigned long *rdump,
+                                                unsigned long nr_rdump)
 {
         struct samsung_clk_reg_dump *rd;
         unsigned int i;
diff --git a/drivers/clk/samsung/clk.h b/drivers/clk/samsung/clk.h
index ec8d46ba8178..93cb8a0deb7b 100644
--- a/drivers/clk/samsung/clk.h
+++ b/drivers/clk/samsung/clk.h
@@ -347,7 +347,7 @@ extern void samsung_clk_restore(void __iomem *base,
                                 const struct samsung_clk_reg_dump *rd,
                                 unsigned int num_regs);
 extern struct samsung_clk_reg_dump *samsung_clk_alloc_reg_dump(
-                                                        unsigned long *rdump,
-                                                        unsigned long nr_rdump);
+                                                const unsigned long *rdump,
+                                                unsigned long nr_rdump);
 
 #endif /* __SAMSUNG_CLK_H */