[PATCH 2/8] clk: spacemit: ccu_mix: add inverted enable gate clock

[Yixun Lan <dlan@kernel.org>]

Based on upstream linux:
  ace73b7e2763 ("clk: spacemit: ccu_mix: add inverted enable gate clock")

K3 SoC has the clock IP which support to write value 0 for enabling the
clock, while write 1 for disabling it, thus the enable BIT is inverted.
So, introduce a flag to support the inverted gate clock.

Signed-off-by: Yixun Lan <dlan@kernel.org>
---
 drivers/clk/spacemit/clk_mix.c |  7 +++++--
 drivers/clk/spacemit/clk_mix.h | 17 +++++++++++++----
 2 files changed, 18 insertions(+), 6 deletions(-)

diff --git a/drivers/clk/spacemit/clk_mix.c b/drivers/clk/spacemit/clk_mix.c
index 45bf2c72375..b0d1a506851 100644
--- a/drivers/clk/spacemit/clk_mix.c
+++ b/drivers/clk/spacemit/clk_mix.c
@@ -33,8 +33,10 @@
 int ccu_gate_disable(struct clk *clk)
 {
 	struct ccu_mix *mix = clk_to_ccu_mix(clk);
+	struct ccu_gate_config *gate = &mix->gate;
+	u32 val = gate->inverted ? gate->mask : 0;
 
-	ccu_update(&mix->common, ctrl, mix->gate.mask, 0);
+	ccu_update(&mix->common, ctrl, gate->mask, val);
 
 	return 0;
 }
@@ -43,8 +45,9 @@ int ccu_gate_enable(struct clk *clk)
 {
 	struct ccu_mix *mix = clk_to_ccu_mix(clk);
 	struct ccu_gate_config *gate = &mix->gate;
+	u32 val = gate->inverted ? 0 : gate->mask;
 
-	ccu_update(&mix->common, ctrl, gate->mask, gate->mask);
+	ccu_update(&mix->common, ctrl, gate->mask, val);
 
 	return 0;
 }
diff --git a/drivers/clk/spacemit/clk_mix.h b/drivers/clk/spacemit/clk_mix.h
index 26a12cedd0d..4ac61b55546 100644
--- a/drivers/clk/spacemit/clk_mix.h
+++ b/drivers/clk/spacemit/clk_mix.h
@@ -20,9 +20,11 @@
  *
  * @mask:	Mask to enable the gate. Some clocks may have more than one bit
  *		set in this field.
+ * @inverted:	Enable bit is inverted, 1 - disable clock, 0 - enable clock
  */
 struct ccu_gate_config {
 	u32 mask;
+	bool inverted;
 };
 
 struct ccu_factor_config {
@@ -48,15 +50,17 @@ struct ccu_mix {
 	struct ccu_common common;
 };
 
-#define CCU_GATE_INIT(_mask)		{ .mask = _mask }
+#define CCU_GATE_INIT(_mask)		{ .mask = _mask, .inverted = false }
+#define CCU_GATE_FLAGS_INIT(_mask, _inverted)	\
+	{ .mask = _mask, .inverted = _inverted }
 #define CCU_FACTOR_INIT(_div, _mul)	{ .div = _div, .mul = _mul }
 #define CCU_MUX_INIT(_shift, _width)	{ .shift = _shift, .width = _width }
 #define CCU_DIV_INIT(_shift, _width)	{ .shift = _shift, .width = _width }
 
-#define CCU_GATE_DEFINE(_id, _var, _name, _parent, _reg_ctrl,		\
-			_mask_gate, _flags)				\
+#define CCU_GATE_FLAGS_DEFINE(_id, _var, _name, _parent, _reg_ctrl,	\
+			      _mask_gate, _inverted, _flags)		\
 static struct ccu_mix _var = {						\
-	.gate	= CCU_GATE_INIT(_mask_gate),				\
+	.gate	= CCU_GATE_FLAGS_INIT(_mask_gate, _inverted),		\
 	.common	= {							\
 		.reg_ctrl	= _reg_ctrl,				\
 		CCU_COMMON(_id, _name, _parent, spacemit_gate_init,	\
@@ -64,6 +68,11 @@ static struct ccu_mix _var = {						\
 	}								\
 }
 
+#define CCU_GATE_DEFINE(_id, _var, _name, _parent, _reg_ctrl,		\
+			_mask_gate, _flags)				\
+	CCU_GATE_FLAGS_DEFINE(_id, _var, _name, _parent, _reg_ctrl,	\
+			      _mask_gate, false, _flags)
+
 #define CCU_FACTOR_DEFINE(_id, _var, _name, _parent, _div, _mul)	\
 static struct ccu_mix _var = {						\
 	.factor	= CCU_FACTOR_INIT(_div, _mul),				\

-- 
2.55.0