clk: samsung: Provide common helpers for register save/restore
As suspend/resume handlers are being moved to SoC specific code, due to
differencies in suspend/resume handling of particular SoCs, to minimize
code duplication this patch provides common register save/restore
helpers that save/restore given list of registers of clock controller.
Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: Heiko Stuebner <heiko@sntech.de>
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>
diff --git a/drivers/clk/samsung/clk.c b/drivers/clk/samsung/clk.c
index f503f32..c0a716b 100644
--- a/drivers/clk/samsung/clk.c
+++ b/drivers/clk/samsung/clk.c
@@ -22,6 +22,38 @@
#endif
#ifdef CONFIG_PM_SLEEP
+void samsung_clk_save(void __iomem *base,
+ struct samsung_clk_reg_dump *rd,
+ unsigned int num_regs)
+{
+ for (; num_regs > 0; --num_regs, ++rd)
+ rd->value = readl(base + rd->offset);
+}
+
+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);
+}
+
+struct samsung_clk_reg_dump *samsung_clk_alloc_reg_dump(unsigned long *rdump,
+ unsigned long nr_rdump)
+{
+ struct samsung_clk_reg_dump *rd;
+ unsigned int i;
+
+ rd = kcalloc(nr_rdump, sizeof(*rd), GFP_KERNEL);
+ if (!rd)
+ return NULL;
+
+ for (i = 0; i < nr_rdump; ++i)
+ rd[i].offset = rdump[i];
+
+ return rd;
+}
+
static struct samsung_clk_reg_dump *reg_dump;
static unsigned long nr_reg_dump;