[PATCH v2 10/13] clk: composite: Add hw based registration APIs

Stephen Boyd
2016-04-21T22:23:23Z

Add registration APIs in the clk composite code to return struct
clk_hw pointers instead of struct clk pointers. This way we hide
the struct clk pointer from providers unless they need to use
consumer facing APIs.

Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
---
drivers/clk/clk-composite.c | 45 ++++++++++++++++++++++++++++++++------------
include/linux/clk-provider.h | 7 +++++++
2 files changed, 40 insertions(+), 12 deletions(-)

diff --git a/drivers/clk/clk-composite.c b/drivers/clk/clk-composite.c
index 1f903e1f86a2..463fadd5a68f 100644
--- a/drivers/clk/clk-composite.c
+++ b/drivers/clk/clk-composite.c
@@ -184,17 +184,18 @@ static void clk_composite_disable(struct clk_hw *hw)
gate_ops->disable(gate_hw);
}

-struct clk *clk_register_composite(struct device *dev, const char *name,
+struct clk_hw *clk_hw_register_composite(struct device *dev, const char *name,
const char * const *parent_names, int num_parents,
struct clk_hw *mux_hw, const struct clk_ops *mux_ops,
struct clk_hw *rate_hw, const struct clk_ops *rate_ops,
struct clk_hw *gate_hw, const struct clk_ops *gate_ops,
unsigned long flags)
{
- struct clk *clk;
+ struct clk_hw *hw;
struct clk_init_data init;
struct clk_composite *composite;
struct clk_ops *clk_composite_ops;
+ int ret;

composite = kzalloc(sizeof(*composite), GFP_KERNEL);
if (!composite)
@@ -204,12 +205,13 @@ struct clk *clk_register_composite(struct device *dev, const char *name,
init.flags = flags | CLK_IS_BASIC;
init.parent_names = parent_names;
init.num_parents = num_parents;
+ hw = &composite->hw;

clk_composite_ops = &composite->ops;

if (mux_hw && mux_ops) {
if (!mux_ops->get_parent) {
- clk = ERR_PTR(-EINVAL);
+ hw = ERR_PTR(-EINVAL);
goto err;
}

@@ -224,7 +226,7 @@ struct clk *clk_register_composite(struct device *dev, const char *name,

if (rate_hw && rate_ops) {
if (!rate_ops->recalc_rate) {
- clk = ERR_PTR(-EINVAL);
+ hw = ERR_PTR(-EINVAL);
goto err;
}
clk_composite_ops->recalc_rate = clk_composite_recalc_rate;
@@ -253,7 +255,7 @@ struct clk *clk_register_composite(struct device *dev, const char *name,
if (gate_hw && gate_ops) {
if (!gate_ops->is_enabled || !gate_ops->enable ||
!gate_ops->disable) {
- clk = ERR_PTR(-EINVAL);
+ hw = ERR_PTR(-EINVAL);
goto err;
}

@@ -267,22 +269,41 @@ struct clk *clk_register_composite(struct device *dev, const char *name,
init.ops = clk_composite_ops;
composite->hw.init = &init;

- clk = clk_register(dev, &composite->hw);
- if (IS_ERR(clk))
+ ret = clk_hw_register(dev, hw);
+ if (ret) {
+ hw = ERR_PTR(ret);
goto err;
+ }

if (composite->mux_hw)
- composite->mux_hw->clk = clk;
+ composite->mux_hw->clk = hw->clk;

if (composite->rate_hw)
- composite->rate_hw->clk = clk;
+ composite->rate_hw->clk = hw->clk;

if (composite->gate_hw)
- composite->gate_hw->clk = clk;
+ composite->gate_hw->clk = hw->clk;

- return clk;
+ return hw;

err:
kfree(composite);
- return clk;
+ return hw;
+}
+
+struct clk *clk_register_composite(struct device *dev, const char *name,
+ const char * const *parent_names, int num_parents,
+ struct clk_hw *mux_hw, const struct clk_ops *mux_ops,
+ struct clk_hw *rate_hw, const struct clk_ops *rate_ops,
+ struct clk_hw *gate_hw, const struct clk_ops *gate_ops,
+ unsigned long flags)
+{
+ struct clk_hw *hw;
+
+ hw = clk_hw_register_composite(dev, name, parent_names, num_parents,
+ mux_hw, mux_ops, rate_hw, rate_ops, gate_hw, gate_ops,
+ flags);
+ if (IS_ERR(hw))
+ return ERR_CAST(hw);
+ return hw->clk;
}
diff --git a/include/linux/clk-provider.h b/include/linux/clk-provider.h
index bcbaf6c95d52..456c3ced1ac9 100644
--- a/include/linux/clk-provider.h
+++ b/include/linux/clk-provider.h
@@ -638,6 +638,13 @@ struct clk *clk_register_composite(struct device *dev, const char *name,
struct clk_hw *rate_hw, const struct clk_ops *rate_ops,
struct clk_hw *gate_hw, const struct clk_ops *gate_ops,
unsigned long flags);
+struct clk_hw *clk_hw_register_composite(struct device *dev, const char *name,
+ const char * const *parent_names, int num_parents,
+ struct clk_hw *mux_hw, const struct clk_ops *mux_ops,
+ struct clk_hw *rate_hw, const struct clk_ops *rate_ops,
+ struct clk_hw *gate_hw, const struct clk_ops *gate_ops,
+ unsigned long flags);
+void clk_hw_unregister_composite(struct clk_hw *hw);

/***
* struct clk_gpio_gate - gpio gated clock