diff options
author | Tomasz Figa <t.figa@samsung.com> | 2014-02-14 08:16:00 +0900 |
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committer | Kukjin Kim <kgene.kim@samsung.com> | 2014-02-14 08:16:00 +0900 |
commit | 3ccefbd2291d6ee59f242c05266e241c5e33667e (patch) | |
tree | 7f28cf471e3e3d7920222223f6d85fee4cf1bc83 /drivers/clk/samsung/clk.c | |
parent | 442f4948e5b0b2bc6e77811a5e46fcd13f0870a6 (diff) | |
download | linux-3ccefbd2291d6ee59f242c05266e241c5e33667e.tar.bz2 |
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>
Diffstat (limited to 'drivers/clk/samsung/clk.c')
-rw-r--r-- | drivers/clk/samsung/clk.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/drivers/clk/samsung/clk.c b/drivers/clk/samsung/clk.c index f503f32e2f80..c0a716b94a66 100644 --- a/drivers/clk/samsung/clk.c +++ b/drivers/clk/samsung/clk.c @@ -22,6 +22,38 @@ static struct clk_onecell_data clk_data; #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; |