Messages in this thread Patch in this message | | | From | Alex Elder <> | Subject | [PATCH] clk: support hardware-specific debugfs entries | Date | Sun, 29 Dec 2013 23:58:50 -0600 |
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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> --- 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 2cf2ea6..c82a1bc 100644 --- a/drivers/clk/clk.c +++ b/drivers/clk/clk.c @@ -268,6 +268,10 @@ 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 7e59253..76ba2b2 100644 --- a/include/linux/clk-provider.h +++ b/include/linux/clk-provider.h @@ -31,6 +31,7 @@ #define CLK_SET_RATE_NO_REPARENT BIT(7) /* don't re-parent on rate change */ struct clk_hw; +struct dentry; /** * struct clk_ops - Callback operations for hardware clocks; these are to @@ -108,6 +109,12 @@ struct clk_hw; * which is likely helpful for most .set_rate implementation. * 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 * (prepare) contexts. If enabling a clock requires code that might sleep, @@ -140,6 +147,7 @@ struct clk_ops { int (*set_rate)(struct clk_hw *hw, unsigned long, unsigned long); void (*init)(struct clk_hw *hw); + int (*debug_init)(struct clk_hw *hw, struct dentry *dentry); }; /** -- 1.7.9.5
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