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authorStephen Boyd <sboyd@codeaurora.org>2015-01-20 03:05:28 +0100
committerMichael Turquette <mturquette@linaro.org>2015-01-27 20:48:39 +0100
commit15a02c1f6dd7c2bb150c61d00ffb33f584ff2288 (patch)
tree803aecc489bac86074b95d25cbdb2bbc426ffb38 /include
parentclk: Fix debugfs clk removal before inited (diff)
downloadlinux-15a02c1f6dd7c2bb150c61d00ffb33f584ff2288.tar.xz
linux-15a02c1f6dd7c2bb150c61d00ffb33f584ff2288.zip
clk: Add __clk_mux_determine_rate_closest
Some clock drivers want to find the closest rate on the input of a mux instead of a rate that's less than or equal to the desired rate. Add a generic mux function to support this. Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> Tested-by: Kenneth Westfield <kwestfie@codeaurora.org> Signed-off-by: Michael Turquette <mturquette@linaro.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/clk-provider.h8
1 files changed, 7 insertions, 1 deletions
diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h
index ebb7055a6d84..ba858e90d5de 100644
--- a/include/linux/clk-provider.h
+++ b/include/linux/clk-provider.h
@@ -384,6 +384,8 @@ void clk_unregister_divider(struct clk *clk);
* register, and mask of mux bits are in higher 16-bit of this register.
* While setting the mux bits, higher 16-bit should also be updated to
* indicate changing mux bits.
+ * CLK_MUX_ROUND_CLOSEST - Use the parent rate that is closest to the desired
+ * frequency.
*/
struct clk_mux {
struct clk_hw hw;
@@ -398,7 +400,8 @@ struct clk_mux {
#define CLK_MUX_INDEX_ONE BIT(0)
#define CLK_MUX_INDEX_BIT BIT(1)
#define CLK_MUX_HIWORD_MASK BIT(2)
-#define CLK_MUX_READ_ONLY BIT(3) /* mux setting cannot be changed */
+#define CLK_MUX_READ_ONLY BIT(3) /* mux can't be changed */
+#define CLK_MUX_ROUND_CLOSEST BIT(4)
extern const struct clk_ops clk_mux_ops;
extern const struct clk_ops clk_mux_ro_ops;
@@ -556,6 +559,9 @@ struct clk *__clk_lookup(const char *name);
long __clk_mux_determine_rate(struct clk_hw *hw, unsigned long rate,
unsigned long *best_parent_rate,
struct clk_hw **best_parent_p);
+long __clk_mux_determine_rate_closest(struct clk_hw *hw, unsigned long rate,
+ unsigned long *best_parent_rate,
+ struct clk_hw **best_parent_p);
/*
* FIXME clock api without lock protection