[PATCH v2 6/7] clk: clk-divider: add clk_register_divider_table()

[Brian Ruley]

The existing clk_register_divider() only supports linear or
power-of-two divider mappings. Some hardware (e.g. i.MX6 PLL5
post_div and video_div) uses non-linear register-value-to-divisor
mappings that require a lookup table.

Add clk_register_divider_table() which accepts a clk_div_table,
and reimplement clk_register_divider() as a wrapper passing
table=NULL.

Signed-off-by: Brian Ruley <brian.ruley at gehealthcare.com>
---
Changes for v2:
- New
---
 drivers/clk/clk-divider.c    | 16 +++++++++++++---
 include/linux/clk-provider.h |  5 +++++
 2 files changed, 18 insertions(+), 3 deletions(-)

diff --git a/drivers/clk/clk-divider.c b/drivers/clk/clk-divider.c
index e692b9c2167..d30786a9e6c 100644
--- a/drivers/clk/clk-divider.c
+++ b/drivers/clk/clk-divider.c
@@ -228,20 +228,30 @@ static struct clk *_register_divider(struct udevice *dev, const char *name,
 	return clk;
 }
 
-struct clk *clk_register_divider(struct udevice *dev, const char *name,
+struct clk *clk_register_divider_table(struct udevice *dev, const char *name,
 		const char *parent_name, unsigned long flags,
 		void __iomem *reg, u8 shift, u8 width,
-		u8 clk_divider_flags)
+		u8 clk_divider_flags, const struct clk_div_table *table)
 {
 	struct clk *clk;
 
 	clk =  _register_divider(dev, name, parent_name, flags, reg, shift,
-				 width, clk_divider_flags, NULL);
+				 width, clk_divider_flags, table);
 	if (IS_ERR(clk))
 		return ERR_CAST(clk);
 	return clk;
 }
 
+struct clk *clk_register_divider(struct udevice *dev, const char *name,
+		const char *parent_name, unsigned long flags,
+		void __iomem *reg, u8 shift, u8 width,
+		u8 clk_divider_flags)
+{
+	return clk_register_divider_table(dev, name, parent_name, flags, reg,
+					  shift, width, clk_divider_flags,
+					  NULL);
+}
+
 U_BOOT_DRIVER(ccf_clk_divider) = {
 	.name	= UBOOT_DM_CLK_CCF_DIVIDER,
 	.id	= UCLASS_CLK,
diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h
index 2d754fa4287..366f2d968a3 100644
--- a/include/linux/clk-provider.h
+++ b/include/linux/clk-provider.h
@@ -246,6 +246,11 @@ struct clk *clk_register_fixed_factor(struct udevice *dev, const char *name,
 		const char *parent_name, unsigned long flags,
 		unsigned int mult, unsigned int div);
 
+struct clk *clk_register_divider_table(struct udevice *dev, const char *name,
+		const char *parent_name, unsigned long flags,
+		void __iomem *reg, u8 shift, u8 width,
+		u8 clk_divider_flags, const struct clk_div_table *table);
+
 struct clk *clk_register_divider(struct udevice *dev, const char *name,
 		const char *parent_name, unsigned long flags,
 		void __iomem *reg, u8 shift, u8 width,
-- 
2.47.3