Merge tag 'samsung-pm-1' of http://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into next/drivers

Merge "Samsung S2R PM updates for v3.15" from Kukjin Kim:

From Tomasz Figa:
This series reworks suspend/resume handling of Samsung clock drivers
to cover more SoC specific aspects that are beyond simple register
save and restore. The goal is to have all the suspend/resume code
that touches the clock controller in single place, which is the clock
driver.

* tag 'samsung-pm-1' of http://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung:
  ARM: EXYNOS: Drop legacy Exynos4 clock suspend/resume code
  clk: samsung: exynos4: Add remaining suspend/resume handling
  clk: samsung: Drop old suspend/resume code
  clk: samsung: s3c64xx: Move suspend/resume handling to SoC driver
  clk: samsung: exynos5420: Move suspend/resume handling to SoC driver
  clk: samsung: exynos5250: Move suspend/resume handling to SoC driver
  clk: samsung: exynos4: Move suspend/resume handling to SoC driver
  clk: samsung: Provide common helpers for register save/restore
  clk: exynos4: Remove remnants of non-DT support

Acked-by: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

1 files changed, 26 insertions, 45 deletions

diff --git a/drivers/clk/samsung/clk.c b/drivers/clk/samsung/clk.c
index f503f32e2f8..91bec3ebdc8 100644
--- a/drivers/clk/samsung/clk.c
+++ b/drivers/clk/samsung/clk.c
@@ -21,64 +21,45 @@ static void __iomem *reg_base;
 static struct clk_onecell_data clk_data;
 #endif
 
-#ifdef CONFIG_PM_SLEEP
-static struct samsung_clk_reg_dump *reg_dump;
-static unsigned long nr_reg_dump;
-
-static int samsung_clk_suspend(void)
+void samsung_clk_save(void __iomem *base,
+				    struct samsung_clk_reg_dump *rd,
+				    unsigned int num_regs)
 {
-	struct samsung_clk_reg_dump *rd = reg_dump;
-	unsigned long i;
-
-	for (i = 0; i < nr_reg_dump; i++, rd++)
-		rd->value = __raw_readl(reg_base + rd->offset);
+	for (; num_regs > 0; --num_regs, ++rd)
+		rd->value = readl(base + rd->offset);
+}
 
-	return 0;
+void samsung_clk_restore(void __iomem *base,
+				      const struct samsung_clk_reg_dump *rd,
+				      unsigned int num_regs)
+{
+	for (; num_regs > 0; --num_regs, ++rd)
+		writel(rd->value, base + rd->offset);
 }
 
-static void samsung_clk_resume(void)
+struct samsung_clk_reg_dump *samsung_clk_alloc_reg_dump(
+						const unsigned long *rdump,
+						unsigned long nr_rdump)
 {
-	struct samsung_clk_reg_dump *rd = reg_dump;
-	unsigned long i;
+	struct samsung_clk_reg_dump *rd;
+	unsigned int i;
 
-	for (i = 0; i < nr_reg_dump; i++, rd++)
-		__raw_writel(rd->value, reg_base + rd->offset);
-}
+	rd = kcalloc(nr_rdump, sizeof(*rd), GFP_KERNEL);
+	if (!rd)
+		return NULL;
+
+	for (i = 0; i < nr_rdump; ++i)
+		rd[i].offset = rdump[i];
 
-static struct syscore_ops samsung_clk_syscore_ops = {
-	.suspend	= samsung_clk_suspend,
-	.resume		= samsung_clk_resume,
-};
-#endif /* CONFIG_PM_SLEEP */
+	return rd;
+}
 
 /* setup the essentials required to support clock lookup using ccf */
 void __init samsung_clk_init(struct device_node *np, void __iomem *base,
-		unsigned long nr_clks, unsigned long *rdump,
-		unsigned long nr_rdump, unsigned long *soc_rdump,
-		unsigned long nr_soc_rdump)
+			     unsigned long nr_clks)
 {
 	reg_base = base;
 
-#ifdef CONFIG_PM_SLEEP
-	if (rdump && nr_rdump) {
-		unsigned int idx;
-		reg_dump = kzalloc(sizeof(struct samsung_clk_reg_dump)
-				* (nr_rdump + nr_soc_rdump), GFP_KERNEL);
-		if (!reg_dump) {
-			pr_err("%s: memory alloc for register dump failed\n",
-					__func__);
-			return;
-		}
-
-		for (idx = 0; idx < nr_rdump; idx++)
-			reg_dump[idx].offset = rdump[idx];
-		for (idx = 0; idx < nr_soc_rdump; idx++)
-			reg_dump[nr_rdump + idx].offset = soc_rdump[idx];
-		nr_reg_dump = nr_rdump + nr_soc_rdump;
-		register_syscore_ops(&samsung_clk_syscore_ops);
-	}
-#endif
-
 	clk_table = kzalloc(sizeof(struct clk *) * nr_clks, GFP_KERNEL);
 	if (!clk_table)
 		panic("could not allocate clock lookup table\n");