clk: ingenic: Add support for clocks whose gate bit is inverted

Support the clocks which are gated when their gate bit is cleared
instead of set.
Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

drivers/clk/ingenic/cgu.c

@@ -43,7 +43,8 @@ static inline bool
 ingenic_cgu_gate_get(struct ingenic_cgu *cgu,
 		     const struct ingenic_cgu_gate_info *info)
 {
-	return readl(cgu->base + info->reg) & BIT(info->bit);
+	return !!(readl(cgu->base + info->reg) & BIT(info->bit))
+		^ info->clear_to_gate;
 }
 
 /**
@@ -62,7 +63,7 @@ ingenic_cgu_gate_set(struct ingenic_cgu *cgu,
 {
 	u32 clkgr = readl(cgu->base + info->reg);
 
-	if (val)
+	if (val ^ info->clear_to_gate)
 		clkgr |= BIT(info->bit);
 	else
 		clkgr &= ~BIT(info->bit);

drivers/clk/ingenic/cgu.h

@@ -111,10 +111,12 @@ struct ingenic_cgu_fixdiv_info {
  * struct ingenic_cgu_gate_info - information about a clock gate
  * @reg: offset of the gate control register within the CGU
  * @bit: offset of the bit in the register that controls the gate
+ * @clear_to_gate: if set, the clock is gated when the bit is cleared
  */
 struct ingenic_cgu_gate_info {
 	unsigned reg;
 	u8 bit;
+	bool clear_to_gate;
 };
 
 /**