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authorAlex Elder <elder@linaro.org>2014-03-21 06:43:56 -0500
committerMike Turquette <mturquette@linaro.org>2014-03-24 17:10:07 -0700
commitc646cbf10fb3347ecda290dfce96b813a423ca07 (patch)
tree499a4c533b84bb9a1066c6c2a428f5db1fe38419
parentafbd1a0c309e3d5cb581a3f7c879be97855fe72f (diff)
downloadop-kernel-dev-c646cbf10fb3347ecda290dfce96b813a423ca07.zip
op-kernel-dev-c646cbf10fb3347ecda290dfce96b813a423ca07.tar.gz
clk: support hardware-specific debugfs entries
Add a new clk_ops->debug_init method to allow a clock hardware driver to populate the clock's debugfs directory with entries beyond those common for every clock. Signed-off-by: Alex Elder <elder@linaro.org> Signed-off-by: Mike Turquette <mturquette@linaro.org>
-rw-r--r--drivers/clk/clk.c4
-rw-r--r--include/linux/clk-provider.h8
2 files changed, 12 insertions, 0 deletions
diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index fb3c40b..1fbcb2b1 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -277,6 +277,10 @@ static int clk_debug_create_one(struct clk *clk, struct dentry *pdentry)
if (!d)
goto err_out;
+ if (clk->ops->debug_init)
+ if (clk->ops->debug_init(clk->hw, clk->dentry))
+ goto err_out;
+
ret = 0;
goto out;
diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h
index 939533d..5119174 100644
--- a/include/linux/clk-provider.h
+++ b/include/linux/clk-provider.h
@@ -32,6 +32,7 @@
#define CLK_GET_ACCURACY_NOCACHE BIT(8) /* do not use the cached clk accuracy */
struct clk_hw;
+struct dentry;
/**
* struct clk_ops - Callback operations for hardware clocks; these are to
@@ -127,6 +128,12 @@ struct clk_hw;
* separately via calls to .set_parent and .set_rate.
* Returns 0 on success, -EERROR otherwise.
*
+ * @debug_init: Set up type-specific debugfs entries for this clock. This
+ * is called once, after the debugfs directory entry for this
+ * clock has been created. The dentry pointer representing that
+ * directory is provided as an argument. Called with
+ * prepare_lock held. Returns 0 on success, -EERROR otherwise.
+ *
*
* The clk_enable/clk_disable and clk_prepare/clk_unprepare pairs allow
* implementations to split any work between atomic (enable) and sleepable
@@ -165,6 +172,7 @@ struct clk_ops {
unsigned long (*recalc_accuracy)(struct clk_hw *hw,
unsigned long parent_accuracy);
void (*init)(struct clk_hw *hw);
+ int (*debug_init)(struct clk_hw *hw, struct dentry *dentry);
};
/**
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