clk: imx: clk-gate2: allow custom gate configuration

The 2-bit gates found i.MX and Vybrid SoC support different clock
configuration:

0b00: clk disabled
0b01: clk enabled in RUN mode but disabled in WAIT and STOP mode
0b10: clk enabled in RUN, WAIT and STOP mode (only Vybrid)
0b11: clk enabled in RUN and WAIT mode

For some clocks, we might want to configure different behaviour,
e.g. a memory clock should be on even in STOP mode. Add a new
function imx_clk_gate2_cgr which allow to configure specific
gate values through the cgr_val parameter.

Signed-off-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

1 files changed, 10 insertions, 3 deletions

diff --git a/drivers/clk/imx/clk.h b/drivers/clk/imx/clk.h
index d942f5748d08..508d0fad84cf 100644
--- a/drivers/clk/imx/clk.h
+++ b/drivers/clk/imx/clk.h
@@ -41,7 +41,7 @@ struct clk *imx_clk_pllv3(enum imx_pllv3_type type, const char *name,
 
 struct clk *clk_register_gate2(struct device *dev, const char *name,
 		const char *parent_name, unsigned long flags,
-		void __iomem *reg, u8 bit_idx,
+		void __iomem *reg, u8 bit_idx, u8 cgr_val,
 		u8 clk_gate_flags, spinlock_t *lock,
 		unsigned int *share_count);
 
@@ -55,7 +55,7 @@ static inline struct clk *imx_clk_gate2(const char *name, const char *parent,
 		void __iomem *reg, u8 shift)
 {
 	return clk_register_gate2(NULL, name, parent, CLK_SET_RATE_PARENT, reg,
-			shift, 0, &imx_ccm_lock, NULL);
+			shift, 0x3, 0, &imx_ccm_lock, NULL);
 }
 
 static inline struct clk *imx_clk_gate2_shared(const char *name,
@@ -63,7 +63,14 @@ static inline struct clk *imx_clk_gate2_shared(const char *name,
 		unsigned int *share_count)
 {
 	return clk_register_gate2(NULL, name, parent, CLK_SET_RATE_PARENT, reg,
-			shift, 0, &imx_ccm_lock, share_count);
+			shift, 0x3, 0, &imx_ccm_lock, share_count);
+}
+
+static inline struct clk *imx_clk_gate2_cgr(const char *name, const char *parent,
+		void __iomem *reg, u8 shift, u8 cgr_val)
+{
+	return clk_register_gate2(NULL, name, parent, CLK_SET_RATE_PARENT, reg,
+			shift, cgr_val, 0, &imx_ccm_lock, NULL);
 }
 
 struct clk *imx_clk_pfd(const char *name, const char *parent_name,