[PATCH V2 01/10] clk/exynos5410: move suspend/resume handling to SoC driver

Rahul Sharma
2014-01-07T13:00:21Z

Suspend/resume handling is already moved for all other Exynos
SoCs other than Exynos5420 which is addressed in this patch.

Signed-off-by: Rahul Sharma <rahul.sharma@samsung.com>
---
drivers/clk/samsung/clk-exynos5410.c | 49 ++++++++++++++++++++++++++++++----
1 file changed, 44 insertions(+), 5 deletions(-)

diff --git a/drivers/clk/samsung/clk-exynos5410.c b/drivers/clk/samsung/clk-exynos5410.c
index 858b3ff..f94c493 100644
--- a/drivers/clk/samsung/clk-exynos5410.c
+++ b/drivers/clk/samsung/clk-exynos5410.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"

@@ -60,6 +61,11 @@ enum exynos5410_plls {
nr_plls /* number of PLLs */
};

+static void __iomem *reg_base;
+
+#ifdef CONFIG_PM_SLEEP
+static struct samsung_clk_reg_dump *exynos5410_save;
+
/*
* list of controller registers to be saved and restored during a
* suspend/resume cycle.
@@ -89,6 +95,41 @@ static unsigned long exynos5410_clk_regs[] __initdata = {
DIV_KFC0,
};

+static int exynos5410_clk_suspend(void)
+{
+ samsung_clk_save(reg_base, exynos5410_save,
+ ARRAY_SIZE(exynos5410_clk_regs));
+
+ return 0;
+}
+
+static void exynos5410_clk_resume(void)
+{
+ samsung_clk_restore(reg_base, exynos5410_save,
+ ARRAY_SIZE(exynos5410_clk_regs));
+}
+
+static struct syscore_ops exynos5410_clk_syscore_ops = {
+ .suspend = exynos5410_clk_suspend,
+ .resume = exynos5410_clk_resume,
+};
+
+static void exynos5410_clk_sleep_init(void)
+{
+ exynos5410_save = samsung_clk_alloc_reg_dump(exynos5410_clk_regs,
+ ARRAY_SIZE(exynos5410_clk_regs));
+ if (!exynos5410_save) {
+ pr_warn("%s: failed to allocate sleep save data, no sleep support!\n",
+ __func__);
+ return;
+ }
+
+ register_syscore_ops(&exynos5410_clk_syscore_ops);
+}
+#else
+static void exynos5410_clk_sleep_init(void) {}
+#endif
+
/* list of all parent clocks */
PNAME(apll_p) = { "fin_pll", "fout_apll", };
PNAME(bpll_p) = { "fin_pll", "fout_bpll", };
@@ -214,15 +255,11 @@ static struct samsung_pll_clock exynos5410_plls[nr_plls] __initdata = {
/* register exynos5410 clocks */
static void __init exynos5410_clk_init(struct device_node *np)
{
- void __iomem *reg_base;
-
reg_base = of_iomap(np, 0);
if (!reg_base)
panic("%s: failed to map registers\n", __func__);

- samsung_clk_init(np, reg_base, CLK_NR_CLKS,
- exynos5410_clk_regs, ARRAY_SIZE(exynos5410_clk_regs),
- NULL, 0);
+ samsung_clk_init(np, reg_base, CLK_NR_CLKS);

samsung_clk_register_pll(exynos5410_plls, ARRAY_SIZE(exynos5410_plls),
reg_base);
@@ -234,6 +271,8 @@ static void __init exynos5410_clk_init(struct device_node *np)
samsung_clk_register_gate(exynos5410_gate_clks,
ARRAY_SIZE(exynos5410_gate_clks));

+ exynos5410_clk_sleep_init();
+
pr_debug("Exynos5410: clock setup completed.\n");
}
CLK_OF_DECLARE(exynos5410_clk, "samsung,exynos5410-clock", exynos5410_clk_init);
--
1.7.9.5