1 files changed, 66 insertions, 0 deletions

diff --git a/drivers/clk/at91/clk-main.c b/drivers/clk/at91/clk-main.c
index cfae2f59df66..8601b27c1ae0 100644
--- a/drivers/clk/at91/clk-main.c
+++ b/drivers/clk/at91/clk-main.c
@@ -28,6 +28,7 @@
 struct clk_main_osc {
 	struct clk_hw hw;
 	struct regmap *regmap;
+	struct at91_clk_pms pms;
 };
 
 #define to_clk_main_osc(hw) container_of(hw, struct clk_main_osc, hw)
@@ -37,6 +38,7 @@ struct clk_main_rc_osc {
 	struct regmap *regmap;
 	unsigned long frequency;
 	unsigned long accuracy;
+	struct at91_clk_pms pms;
 };
 
 #define to_clk_main_rc_osc(hw) container_of(hw, struct clk_main_rc_osc, hw)
@@ -51,6 +53,7 @@ struct clk_rm9200_main {
 struct clk_sam9x5_main {
 	struct clk_hw hw;
 	struct regmap *regmap;
+	struct at91_clk_pms pms;
 	u8 parent;
 };
 
@@ -120,10 +123,29 @@ static int clk_main_osc_is_prepared(struct clk_hw *hw)
 	return (status & AT91_PMC_MOSCS) && clk_main_parent_select(tmp);
 }
 
+static int clk_main_osc_save_context(struct clk_hw *hw)
+{
+	struct clk_main_osc *osc = to_clk_main_osc(hw);
+
+	osc->pms.status = clk_main_osc_is_prepared(hw);
+
+	return 0;
+}
+
+static void clk_main_osc_restore_context(struct clk_hw *hw)
+{
+	struct clk_main_osc *osc = to_clk_main_osc(hw);
+
+	if (osc->pms.status)
+		clk_main_osc_prepare(hw);
+}
+
 static const struct clk_ops main_osc_ops = {
 	.prepare = clk_main_osc_prepare,
 	.unprepare = clk_main_osc_unprepare,
 	.is_prepared = clk_main_osc_is_prepared,
+	.save_context = clk_main_osc_save_context,
+	.restore_context = clk_main_osc_restore_context,
 };
 
 struct clk_hw * __init
@@ -240,12 +262,31 @@ static unsigned long clk_main_rc_osc_recalc_accuracy(struct clk_hw *hw,
 	return osc->accuracy;
 }
 
+static int clk_main_rc_osc_save_context(struct clk_hw *hw)
+{
+	struct clk_main_rc_osc *osc = to_clk_main_rc_osc(hw);
+
+	osc->pms.status = clk_main_rc_osc_is_prepared(hw);
+
+	return 0;
+}
+
+static void clk_main_rc_osc_restore_context(struct clk_hw *hw)
+{
+	struct clk_main_rc_osc *osc = to_clk_main_rc_osc(hw);
+
+	if (osc->pms.status)
+		clk_main_rc_osc_prepare(hw);
+}
+
 static const struct clk_ops main_rc_osc_ops = {
 	.prepare = clk_main_rc_osc_prepare,
 	.unprepare = clk_main_rc_osc_unprepare,
 	.is_prepared = clk_main_rc_osc_is_prepared,
 	.recalc_rate = clk_main_rc_osc_recalc_rate,
 	.recalc_accuracy = clk_main_rc_osc_recalc_accuracy,
+	.save_context = clk_main_rc_osc_save_context,
+	.restore_context = clk_main_rc_osc_restore_context,
 };
 
 struct clk_hw * __init
@@ -465,12 +506,37 @@ static u8 clk_sam9x5_main_get_parent(struct clk_hw *hw)
 	return clk_main_parent_select(status);
 }
 
+static int clk_sam9x5_main_save_context(struct clk_hw *hw)
+{
+	struct clk_sam9x5_main *clkmain = to_clk_sam9x5_main(hw);
+
+	clkmain->pms.status = clk_main_rc_osc_is_prepared(&clkmain->hw);
+	clkmain->pms.parent = clk_sam9x5_main_get_parent(&clkmain->hw);
+
+	return 0;
+}
+
+static void clk_sam9x5_main_restore_context(struct clk_hw *hw)
+{
+	struct clk_sam9x5_main *clkmain = to_clk_sam9x5_main(hw);
+	int ret;
+
+	ret = clk_sam9x5_main_set_parent(hw, clkmain->pms.parent);
+	if (ret)
+		return;
+
+	if (clkmain->pms.status)
+		clk_sam9x5_main_prepare(hw);
+}
+
 static const struct clk_ops sam9x5_main_ops = {
 	.prepare = clk_sam9x5_main_prepare,
 	.is_prepared = clk_sam9x5_main_is_prepared,
 	.recalc_rate = clk_sam9x5_main_recalc_rate,
 	.set_parent = clk_sam9x5_main_set_parent,
 	.get_parent = clk_sam9x5_main_get_parent,
+	.save_context = clk_sam9x5_main_save_context,
+	.restore_context = clk_sam9x5_main_restore_context,
 };
 
 struct clk_hw * __init