clk: divider: export clk_div_mask() helper

Export clk_div_mask() in clk-provider header so every clock providers
derived from the generic clock divider may share the definition instead
of redefining it.

Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Michael Turquette <mturquette@baylibre.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

diff --git a/drivers/clk/clk-divider.c b/drivers/clk/clk-divider.c
index b49942b..3c98d26 100644 (file)
--- a/drivers/clk/clk-divider.c
+++ b/drivers/clk/clk-divider.c
@@ -28,12 +28,10 @@
  * parent - fixed parent.  No clk_set_parent support
  */
 
-#define div_mask(width)        ((1 << (width)) - 1)
-
 static unsigned int _get_table_maxdiv(const struct clk_div_table *table,
                                      u8 width)
 {
-       unsigned int maxdiv = 0, mask = div_mask(width);
+       unsigned int maxdiv = 0, mask = clk_div_mask(width);
        const struct clk_div_table *clkt;
 
        for (clkt = table; clkt->div; clkt++)
@@ -57,12 +55,12 @@ static unsigned int _get_maxdiv(const struct clk_div_table *table, u8 width,
                                unsigned long flags)
 {
        if (flags & CLK_DIVIDER_ONE_BASED)
-               return div_mask(width);
+               return clk_div_mask(width);
        if (flags & CLK_DIVIDER_POWER_OF_TWO)
-               return 1 << div_mask(width);
+               return 1 << clk_div_mask(width);
        if (table)
                return _get_table_maxdiv(table, width);
-       return div_mask(width) + 1;
+       return clk_div_mask(width) + 1;
 }
 
 static unsigned int _get_table_div(const struct clk_div_table *table,
@@ -84,7 +82,7 @@ static unsigned int _get_div(const struct clk_div_table *table,
        if (flags & CLK_DIVIDER_POWER_OF_TWO)
                return 1 << val;
        if (flags & CLK_DIVIDER_MAX_AT_ZERO)
-               return val ? val : div_mask(width) + 1;
+               return val ? val : clk_div_mask(width) + 1;
        if (table)
                return _get_table_div(table, val);
        return val + 1;
@@ -109,7 +107,7 @@ static unsigned int _get_val(const struct clk_div_table *table,
        if (flags & CLK_DIVIDER_POWER_OF_TWO)
                return __ffs(div);
        if (flags & CLK_DIVIDER_MAX_AT_ZERO)
-               return (div == div_mask(width) + 1) ? 0 : div;
+               return (div == clk_div_mask(width) + 1) ? 0 : div;
        if (table)
                return  _get_table_val(table, div);
        return div - 1;
@@ -141,7 +139,7 @@ static unsigned long clk_divider_recalc_rate(struct clk_hw *hw,
        unsigned int val;
 
        val = clk_readl(divider->reg) >> divider->shift;
-       val &= div_mask(divider->width);
+       val &= clk_div_mask(divider->width);
 
        return divider_recalc_rate(hw, parent_rate, val, divider->table,
                                   divider->flags, divider->width);
@@ -353,7 +351,7 @@ static long clk_divider_round_rate(struct clk_hw *hw, unsigned long rate,
        /* if read only, just return current value */
        if (divider->flags & CLK_DIVIDER_READ_ONLY) {
                bestdiv = clk_readl(divider->reg) >> divider->shift;
-               bestdiv &= div_mask(divider->width);
+               bestdiv &= clk_div_mask(divider->width);
                bestdiv = _get_div(divider->table, bestdiv, divider->flags,
                        divider->width);
                return DIV_ROUND_UP_ULL((u64)*prate, bestdiv);
@@ -376,7 +374,7 @@ int divider_get_val(unsigned long rate, unsigned long parent_rate,
 
        value = _get_val(table, div, flags, width);
 
-       return min_t(unsigned int, value, div_mask(width));
+       return min_t(unsigned int, value, clk_div_mask(width));
 }
 EXPORT_SYMBOL_GPL(divider_get_val);
 
@@ -399,10 +397,10 @@ static int clk_divider_set_rate(struct clk_hw *hw, unsigned long rate,
                __acquire(divider->lock);
 
        if (divider->flags & CLK_DIVIDER_HIWORD_MASK) {
-               val = div_mask(divider->width) << (divider->shift + 16);
+               val = clk_div_mask(divider->width) << (divider->shift + 16);
        } else {
                val = clk_readl(divider->reg);
-               val &= ~(div_mask(divider->width) << divider->shift);
+               val &= ~(clk_div_mask(divider->width) << divider->shift);
        }
        val |= (u32)value << divider->shift;
        clk_writel(val, divider->reg);

diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h
index f711be6..d8ba26d 100644 (file)
--- a/include/linux/clk-provider.h
+++ b/include/linux/clk-provider.h
@@ -399,6 +399,7 @@ struct clk_divider {
        spinlock_t      *lock;
 };
 
+#define clk_div_mask(width)    ((1 << (width)) - 1)
 #define to_clk_divider(_hw) container_of(_hw, struct clk_divider, hw)
 
 #define CLK_DIVIDER_ONE_BASED          BIT(0)