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| author | Russ Dill <Russ.Dill@ti.com> | 2018-09-04 12:19:37 +0530 |
|---|---|---|
| committer | Tero Kristo <t-kristo@ti.com> | 2018-10-03 15:29:19 +0300 |
| commit | d6e7bbc148f9fbec8a0117b0d0f420c9710e6d81 (patch) | |
| tree | fa2ac59eb7d2afd4b8af48d59dc30d673dd5f2f7 /drivers/clk/ti/mux.c | |
| parent | 435365485f40cf12747d1daa2253a4f4b46b8148 (diff) | |
| download | linux-d6e7bbc148f9fbec8a0117b0d0f420c9710e6d81.tar.gz | |
clk: ti: Add functions to save/restore clk context
SoCs like AM43XX lose clock registers context during RTC-only suspend. Hence add functions to save/restore the clock registers context. Signed-off-by: Keerthy <j-keerthy@ti.com> Signed-off-by: Russ Dill <Russ.Dill@ti.com> Acked-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Tero Kristo <t-kristo@ti.com>
Diffstat (limited to 'drivers/clk/ti/mux.c')
| -rw-r--r-- | drivers/clk/ti/mux.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/drivers/clk/ti/mux.c b/drivers/clk/ti/mux.c index 69a4308a5a98..5749b2b4fa61 100644 --- a/drivers/clk/ti/mux.c +++ b/drivers/clk/ti/mux.c @@ -91,10 +91,39 @@ static int ti_clk_mux_set_parent(struct clk_hw *hw, u8 index) return 0; } +/** + * clk_mux_save_context - Save the parent selcted in the mux + * @hw: pointer struct clk_hw + * + * Save the parent mux value. + */ +static int clk_mux_save_context(struct clk_hw *hw) +{ + struct clk_omap_mux *mux = to_clk_omap_mux(hw); + + mux->saved_parent = ti_clk_mux_get_parent(hw); + return 0; +} + +/** + * clk_mux_restore_context - Restore the parent in the mux + * @hw: pointer struct clk_hw + * + * Restore the saved parent mux value. + */ +static void clk_mux_restore_context(struct clk_hw *hw) +{ + struct clk_omap_mux *mux = to_clk_omap_mux(hw); + + ti_clk_mux_set_parent(hw, mux->saved_parent); +} + const struct clk_ops ti_clk_mux_ops = { .get_parent = ti_clk_mux_get_parent, .set_parent = ti_clk_mux_set_parent, .determine_rate = __clk_mux_determine_rate, + .save_context = clk_mux_save_context, + .restore_context = clk_mux_restore_context, }; static struct clk *_register_mux(struct device *dev, const char *name, |