Am Donnerstag, 6. Februar 2014, 19:16:49 schrieb Tomasz Figa:
> 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@xxxxxxxxxxx>
> Acked-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
Acked-by: Heiko Stuebner <heiko@xxxxxxxxx>
> ---
> drivers/clk/samsung/clk.c | 32 ++++++++++++++++++++++++++++++++
> drivers/clk/samsung/clk.h | 10 ++++++++++
> 2 files changed, 42 insertions(+)
>
> 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 @@ 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;
>
> diff --git a/drivers/clk/samsung/clk.h b/drivers/clk/samsung/clk.h
> index 31b4174..ec8d46b 100644
> --- a/drivers/clk/samsung/clk.h
> +++ b/drivers/clk/samsung/clk.h
> @@ -340,4 +340,14 @@ extern void __init samsung_clk_register_pll(struct
> samsung_pll_clock *pll_list,
>
> extern unsigned long _get_rate(const char *clk_name);
>
> +extern void samsung_clk_save(void __iomem *base,
> + struct samsung_clk_reg_dump *rd,
> + unsigned int num_regs);
> +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);
> +
> #endif /* __SAMSUNG_CLK_H */
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