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 <[email protected]>
---
v2: - Define debug_init unconditionally (suggested by Gerhard Sittig).
drivers/clk/clk.c | 4 ++++
include/linux/clk-provider.h | 8 ++++++++
2 files changed, 12 insertions(+)
diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index e3e0327..8769b01 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 5429f5d..b91674d 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
@@ -116,6 +117,12 @@ struct clk_hw;
* set then clock accuracy will be initialized to parent accuracy
* or 0 (perfect clock) if clock has no parent.
*
+ * @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
* (prepare) contexts. If enabling a clock requires code that might sleep,
@@ -150,6 +157,7 @@ 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);
};
/**
--
1.7.9.5