The ti_clk_register() and ti_clk_register_omap_hw() functions are always
called with the parameter of type "struct device" set to NULL, since the
functions from which they are called always have a parameter of type
"struct device_node". Replacing "struct device" type parameter with
"struct device_node" will allow you to register a TI clock to the common
clock framework by taking advantage of the facilities provided by the
"struct device_node" type. Further, adding the "of_" prefix to the name
of these functions explicitly binds them to the "struct device_node"
type.
The patch has been tested on a Beaglebone board.
Signed-off-by: Dario Binacchi <[email protected]>
---
Changes in v4:
- Extend the patch to ti_clk_register_omap_hw() function. Replace
ti_clk_register[_omap_hw]() functions with of_ti_clk_register[_omap_hw]().
- Change commit title and description.
drivers/clk/ti/apll.c | 4 ++--
drivers/clk/ti/clk-dra7-atl.c | 2 +-
drivers/clk/ti/clk.c | 34 ++++++++++++++++------------------
drivers/clk/ti/clkctrl.c | 4 ++--
drivers/clk/ti/clock.h | 10 +++++-----
drivers/clk/ti/composite.c | 2 +-
drivers/clk/ti/divider.c | 2 +-
drivers/clk/ti/dpll.c | 4 ++--
drivers/clk/ti/fixed-factor.c | 2 +-
drivers/clk/ti/gate.c | 6 +++---
drivers/clk/ti/interface.c | 7 ++++---
drivers/clk/ti/mux.c | 6 +++---
12 files changed, 41 insertions(+), 42 deletions(-)
diff --git a/drivers/clk/ti/apll.c b/drivers/clk/ti/apll.c
index dd0709c9c249..93183287c58d 100644
--- a/drivers/clk/ti/apll.c
+++ b/drivers/clk/ti/apll.c
@@ -160,7 +160,7 @@ static void __init omap_clk_register_apll(void *user,
ad->clk_bypass = __clk_get_hw(clk);
name = ti_dt_clk_name(node);
- clk = ti_clk_register_omap_hw(NULL, &clk_hw->hw, name);
+ clk = of_ti_clk_register_omap_hw(node, &clk_hw->hw, name);
if (!IS_ERR(clk)) {
of_clk_add_provider(node, of_clk_src_simple_get, clk);
kfree(init->parent_names);
@@ -400,7 +400,7 @@ static void __init of_omap2_apll_setup(struct device_node *node)
goto cleanup;
name = ti_dt_clk_name(node);
- clk = ti_clk_register_omap_hw(NULL, &clk_hw->hw, name);
+ clk = of_ti_clk_register_omap_hw(node, &clk_hw->hw, name);
if (!IS_ERR(clk)) {
of_clk_add_provider(node, of_clk_src_simple_get, clk);
kfree(init);
diff --git a/drivers/clk/ti/clk-dra7-atl.c b/drivers/clk/ti/clk-dra7-atl.c
index ff4d6a951681..1c576599f6db 100644
--- a/drivers/clk/ti/clk-dra7-atl.c
+++ b/drivers/clk/ti/clk-dra7-atl.c
@@ -197,7 +197,7 @@ static void __init of_dra7_atl_clock_setup(struct device_node *node)
init.parent_names = parent_names;
- clk = ti_clk_register(NULL, &clk_hw->hw, name);
+ clk = of_ti_clk_register(node, &clk_hw->hw, name);
if (!IS_ERR(clk)) {
of_clk_add_provider(node, of_clk_src_simple_get, clk);
diff --git a/drivers/clk/ti/clk.c b/drivers/clk/ti/clk.c
index 1dc2f15fb75b..269355010cdc 100644
--- a/drivers/clk/ti/clk.c
+++ b/drivers/clk/ti/clk.c
@@ -475,7 +475,7 @@ void __init ti_clk_add_aliases(void)
clkspec.np = np;
clk = of_clk_get_from_provider(&clkspec);
- ti_clk_add_alias(NULL, clk, ti_dt_clk_name(np));
+ ti_clk_add_alias(clk, ti_dt_clk_name(np));
}
}
@@ -528,7 +528,6 @@ void omap2_clk_enable_init_clocks(const char **clk_names, u8 num_clocks)
/**
* ti_clk_add_alias - add a clock alias for a TI clock
- * @dev: device alias for this clock
* @clk: clock handle to create alias for
* @con: connection ID for this clock
*
@@ -536,7 +535,7 @@ void omap2_clk_enable_init_clocks(const char **clk_names, u8 num_clocks)
* and assigns the data to it. Returns 0 if successful, negative error
* value otherwise.
*/
-int ti_clk_add_alias(struct device *dev, struct clk *clk, const char *con)
+int ti_clk_add_alias(struct clk *clk, const char *con)
{
struct clk_lookup *cl;
@@ -550,8 +549,6 @@ int ti_clk_add_alias(struct device *dev, struct clk *clk, const char *con)
if (!cl)
return -ENOMEM;
- if (dev)
- cl->dev_id = dev_name(dev);
cl->con_id = con;
cl->clk = clk;
@@ -561,8 +558,8 @@ int ti_clk_add_alias(struct device *dev, struct clk *clk, const char *con)
}
/**
- * ti_clk_register - register a TI clock to the common clock framework
- * @dev: device for this clock
+ * of_ti_clk_register - register a TI clock to the common clock framework
+ * @node: device node for this clock
* @hw: hardware clock handle
* @con: connection ID for this clock
*
@@ -570,17 +567,18 @@ int ti_clk_add_alias(struct device *dev, struct clk *clk, const char *con)
* alias for it. Returns a handle to the registered clock if successful,
* ERR_PTR value in failure.
*/
-struct clk *ti_clk_register(struct device *dev, struct clk_hw *hw,
- const char *con)
+struct clk *of_ti_clk_register(struct device_node *node, struct clk_hw *hw,
+ const char *con)
{
struct clk *clk;
int ret;
- clk = clk_register(dev, hw);
- if (IS_ERR(clk))
- return clk;
+ ret = of_clk_hw_register(node, hw);
+ if (ret)
+ return ERR_PTR(ret);
- ret = ti_clk_add_alias(dev, clk, con);
+ clk = hw->clk;
+ ret = ti_clk_add_alias(clk, con);
if (ret) {
clk_unregister(clk);
return ERR_PTR(ret);
@@ -590,8 +588,8 @@ struct clk *ti_clk_register(struct device *dev, struct clk_hw *hw,
}
/**
- * ti_clk_register_omap_hw - register a clk_hw_omap to the clock framework
- * @dev: device for this clock
+ * of_ti_clk_register_omap_hw - register a clk_hw_omap to the clock framework
+ * @node: device node for this clock
* @hw: hardware clock handle
* @con: connection ID for this clock
*
@@ -600,13 +598,13 @@ struct clk *ti_clk_register(struct device *dev, struct clk_hw *hw,
* Returns a handle to the registered clock if successful, ERR_PTR value
* in failure.
*/
-struct clk *ti_clk_register_omap_hw(struct device *dev, struct clk_hw *hw,
- const char *con)
+struct clk *of_ti_clk_register_omap_hw(struct device_node *node,
+ struct clk_hw *hw, const char *con)
{
struct clk *clk;
struct clk_hw_omap *oclk;
- clk = ti_clk_register(dev, hw, con);
+ clk = of_ti_clk_register(node, hw, con);
if (IS_ERR(clk))
return clk;
diff --git a/drivers/clk/ti/clkctrl.c b/drivers/clk/ti/clkctrl.c
index ae5862879417..f73f402ff7de 100644
--- a/drivers/clk/ti/clkctrl.c
+++ b/drivers/clk/ti/clkctrl.c
@@ -305,7 +305,7 @@ _ti_clkctrl_clk_register(struct omap_clkctrl_provider *provider,
init.ops = ops;
init.flags = 0;
- clk = ti_clk_register(NULL, clk_hw, init.name);
+ clk = of_ti_clk_register(node, clk_hw, init.name);
if (IS_ERR_OR_NULL(clk)) {
ret = -EINVAL;
goto cleanup;
@@ -682,7 +682,7 @@ static void __init _ti_omap4_clkctrl_setup(struct device_node *node)
init.ops = &omap4_clkctrl_clk_ops;
hw->hw.init = &init;
- clk = ti_clk_register_omap_hw(NULL, &hw->hw, init.name);
+ clk = of_ti_clk_register_omap_hw(node, &hw->hw, init.name);
if (IS_ERR_OR_NULL(clk))
goto cleanup;
diff --git a/drivers/clk/ti/clock.h b/drivers/clk/ti/clock.h
index 37ab53339a9b..16a9f7c2280a 100644
--- a/drivers/clk/ti/clock.h
+++ b/drivers/clk/ti/clock.h
@@ -199,12 +199,12 @@ extern const struct omap_clkctrl_data dm816_clkctrl_data[];
typedef void (*ti_of_clk_init_cb_t)(void *, struct device_node *);
-struct clk *ti_clk_register(struct device *dev, struct clk_hw *hw,
- const char *con);
-struct clk *ti_clk_register_omap_hw(struct device *dev, struct clk_hw *hw,
- const char *con);
+struct clk *of_ti_clk_register(struct device_node *node, struct clk_hw *hw,
+ const char *con);
+struct clk *of_ti_clk_register_omap_hw(struct device_node *node,
+ struct clk_hw *hw, const char *con);
const char *ti_dt_clk_name(struct device_node *np);
-int ti_clk_add_alias(struct device *dev, struct clk *clk, const char *con);
+int ti_clk_add_alias(struct clk *clk, const char *con);
void ti_clk_add_aliases(void);
void ti_clk_latch(struct clk_omap_reg *reg, s8 shift);
diff --git a/drivers/clk/ti/composite.c b/drivers/clk/ti/composite.c
index 77b771dd050a..b85382c370f7 100644
--- a/drivers/clk/ti/composite.c
+++ b/drivers/clk/ti/composite.c
@@ -176,7 +176,7 @@ static void __init _register_composite(void *user,
&ti_composite_gate_ops, 0);
if (!IS_ERR(clk)) {
- ret = ti_clk_add_alias(NULL, clk, name);
+ ret = ti_clk_add_alias(clk, name);
if (ret) {
clk_unregister(clk);
goto cleanup;
diff --git a/drivers/clk/ti/divider.c b/drivers/clk/ti/divider.c
index 488d3da60c31..768a1f3398b4 100644
--- a/drivers/clk/ti/divider.c
+++ b/drivers/clk/ti/divider.c
@@ -326,7 +326,7 @@ static struct clk *_register_divider(struct device_node *node,
div->hw.init = &init;
/* register the clock */
- clk = ti_clk_register(NULL, &div->hw, name);
+ clk = of_ti_clk_register(node, &div->hw, name);
if (IS_ERR(clk))
kfree(div);
diff --git a/drivers/clk/ti/dpll.c b/drivers/clk/ti/dpll.c
index 8ed43bc6b7cc..403ec81f561b 100644
--- a/drivers/clk/ti/dpll.c
+++ b/drivers/clk/ti/dpll.c
@@ -187,7 +187,7 @@ static void __init _register_dpll(void *user,
/* register the clock */
name = ti_dt_clk_name(node);
- clk = ti_clk_register_omap_hw(NULL, &clk_hw->hw, name);
+ clk = of_ti_clk_register_omap_hw(node, &clk_hw->hw, name);
if (!IS_ERR(clk)) {
of_clk_add_provider(node, of_clk_src_simple_get, clk);
@@ -259,7 +259,7 @@ static void _register_dpll_x2(struct device_node *node,
#endif
/* register the clock */
- clk = ti_clk_register_omap_hw(NULL, &clk_hw->hw, name);
+ clk = of_ti_clk_register_omap_hw(node, &clk_hw->hw, name);
if (IS_ERR(clk))
kfree(clk_hw);
diff --git a/drivers/clk/ti/fixed-factor.c b/drivers/clk/ti/fixed-factor.c
index c80cee0f5d3d..c102c5320168 100644
--- a/drivers/clk/ti/fixed-factor.c
+++ b/drivers/clk/ti/fixed-factor.c
@@ -54,7 +54,7 @@ static void __init of_ti_fixed_factor_clk_setup(struct device_node *node)
if (!IS_ERR(clk)) {
of_clk_add_provider(node, of_clk_src_simple_get, clk);
of_ti_clk_autoidle_setup(node);
- ti_clk_add_alias(NULL, clk, clk_name);
+ ti_clk_add_alias(clk, clk_name);
}
}
CLK_OF_DECLARE(ti_fixed_factor_clk, "ti,fixed-factor-clock",
diff --git a/drivers/clk/ti/gate.c b/drivers/clk/ti/gate.c
index 307702921431..8e477d50d0fd 100644
--- a/drivers/clk/ti/gate.c
+++ b/drivers/clk/ti/gate.c
@@ -85,7 +85,7 @@ static int omap36xx_gate_clk_enable_with_hsdiv_restore(struct clk_hw *hw)
return ret;
}
-static struct clk *_register_gate(struct device *dev, const char *name,
+static struct clk *_register_gate(struct device_node *node, const char *name,
const char *parent_name, unsigned long flags,
struct clk_omap_reg *reg, u8 bit_idx,
u8 clk_gate_flags, const struct clk_ops *ops,
@@ -115,7 +115,7 @@ static struct clk *_register_gate(struct device *dev, const char *name,
init.flags = flags;
- clk = ti_clk_register_omap_hw(NULL, &clk_hw->hw, name);
+ clk = of_ti_clk_register_omap_hw(node, &clk_hw->hw, name);
if (IS_ERR(clk))
kfree(clk_hw);
@@ -158,7 +158,7 @@ static void __init _of_ti_gate_clk_setup(struct device_node *node,
clk_gate_flags |= INVERT_ENABLE;
name = ti_dt_clk_name(node);
- clk = _register_gate(NULL, name, parent_name, flags, ®,
+ clk = _register_gate(node, name, parent_name, flags, ®,
enable_bit, clk_gate_flags, ops, hw_ops);
if (!IS_ERR(clk))
diff --git a/drivers/clk/ti/interface.c b/drivers/clk/ti/interface.c
index f47beeea211e..172301c646f8 100644
--- a/drivers/clk/ti/interface.c
+++ b/drivers/clk/ti/interface.c
@@ -24,7 +24,8 @@ static const struct clk_ops ti_interface_clk_ops = {
.is_enabled = &omap2_dflt_clk_is_enabled,
};
-static struct clk *_register_interface(struct device *dev, const char *name,
+static struct clk *_register_interface(struct device_node *node,
+ const char *name,
const char *parent_name,
struct clk_omap_reg *reg, u8 bit_idx,
const struct clk_hw_omap_ops *ops)
@@ -49,7 +50,7 @@ static struct clk *_register_interface(struct device *dev, const char *name,
init.num_parents = 1;
init.parent_names = &parent_name;
- clk = ti_clk_register_omap_hw(NULL, &clk_hw->hw, name);
+ clk = of_ti_clk_register_omap_hw(node, &clk_hw->hw, name);
if (IS_ERR(clk))
kfree(clk_hw);
@@ -80,7 +81,7 @@ static void __init _of_ti_interface_clk_setup(struct device_node *node,
}
name = ti_dt_clk_name(node);
- clk = _register_interface(NULL, name, parent_name, ®,
+ clk = _register_interface(node, name, parent_name, ®,
enable_bit, ops);
if (!IS_ERR(clk))
diff --git a/drivers/clk/ti/mux.c b/drivers/clk/ti/mux.c
index 46b45b3e8319..1ebafa386be6 100644
--- a/drivers/clk/ti/mux.c
+++ b/drivers/clk/ti/mux.c
@@ -118,7 +118,7 @@ const struct clk_ops ti_clk_mux_ops = {
.restore_context = clk_mux_restore_context,
};
-static struct clk *_register_mux(struct device *dev, const char *name,
+static struct clk *_register_mux(struct device_node *node, const char *name,
const char * const *parent_names,
u8 num_parents, unsigned long flags,
struct clk_omap_reg *reg, u8 shift, u32 mask,
@@ -148,7 +148,7 @@ static struct clk *_register_mux(struct device *dev, const char *name,
mux->table = table;
mux->hw.init = &init;
- clk = ti_clk_register(dev, &mux->hw, name);
+ clk = of_ti_clk_register(node, &mux->hw, name);
if (IS_ERR(clk))
kfree(mux);
@@ -207,7 +207,7 @@ static void of_mux_clk_setup(struct device_node *node)
mask = (1 << fls(mask)) - 1;
name = ti_dt_clk_name(node);
- clk = _register_mux(NULL, name, parent_names, num_parents,
+ clk = _register_mux(node, name, parent_names, num_parents,
flags, ®, shift, mask, latch, clk_mux_flags,
NULL);
--
2.32.0
The `parent_names' variable was freed also in case of kzalloc() error.
Instead of modifying the code to perform a proper memory release, I
decided to fix the bug by not allocating memory.
Since only one parent name is referenced, it is not necessary to
allocate this variable at runtime and therefore you can avoid calling
the kzalloc() function. This simplifies the code (even calls to kfree
can be removed) and improves the performance of the routine.
Signed-off-by: Dario Binacchi <[email protected]>
Reported-by: kernel test robot <[email protected]>
---
(no changes since v3)
Changes in v3:
- Add the "clk: ti: add of_ti_clk_register() helper" patch to the series.
- Use a variable of type struct clk_parent_data to furthermore simplify
the code.
- Update the commit message.
Changes in v2:
- Fix compiling error
- Add kernel test robot's Reported-by tag.
drivers/clk/ti/clk-dra7-atl.c | 14 ++------------
1 file changed, 2 insertions(+), 12 deletions(-)
diff --git a/drivers/clk/ti/clk-dra7-atl.c b/drivers/clk/ti/clk-dra7-atl.c
index 1c576599f6db..d964e3affd42 100644
--- a/drivers/clk/ti/clk-dra7-atl.c
+++ b/drivers/clk/ti/clk-dra7-atl.c
@@ -163,8 +163,8 @@ static const struct clk_ops atl_clk_ops = {
static void __init of_dra7_atl_clock_setup(struct device_node *node)
{
struct dra7_atl_desc *clk_hw = NULL;
+ struct clk_parent_data pdata = { .index = 0 };
struct clk_init_data init = { NULL };
- const char **parent_names = NULL;
const char *name;
struct clk *clk;
@@ -188,24 +188,14 @@ static void __init of_dra7_atl_clock_setup(struct device_node *node)
goto cleanup;
}
- parent_names = kzalloc(sizeof(char *), GFP_KERNEL);
-
- if (!parent_names)
- goto cleanup;
-
- parent_names[0] = of_clk_get_parent_name(node, 0);
-
- init.parent_names = parent_names;
-
+ init.parent_data = &pdata;
clk = of_ti_clk_register(node, &clk_hw->hw, name);
if (!IS_ERR(clk)) {
of_clk_add_provider(node, of_clk_src_simple_get, clk);
- kfree(parent_names);
return;
}
cleanup:
- kfree(parent_names);
kfree(clk_hw);
}
CLK_OF_DECLARE(dra7_atl_clock, "ti,dra7-atl-clock", of_dra7_atl_clock_setup);
--
2.32.0
* Dario Binacchi <[email protected]> [221113 18:01]:
> The ti_clk_register() and ti_clk_register_omap_hw() functions are always
> called with the parameter of type "struct device" set to NULL, since the
> functions from which they are called always have a parameter of type
> "struct device_node". Replacing "struct device" type parameter with
> "struct device_node" will allow you to register a TI clock to the common
> clock framework by taking advantage of the facilities provided by the
> "struct device_node" type. Further, adding the "of_" prefix to the name
> of these functions explicitly binds them to the "struct device_node"
> type.
Looks good to me, nice clean-up:
Reviewed-by: Tony Lindgren <[email protected]>
Tested-by: Tony Lindgren <[email protected]>
Quoting Dario Binacchi (2022-11-13 10:11:47)
> The `parent_names' variable was freed also in case of kzalloc() error.
> Instead of modifying the code to perform a proper memory release, I
> decided to fix the bug by not allocating memory.
> Since only one parent name is referenced, it is not necessary to
> allocate this variable at runtime and therefore you can avoid calling
> the kzalloc() function. This simplifies the code (even calls to kfree
> can be removed) and improves the performance of the routine.
>
> Signed-off-by: Dario Binacchi <[email protected]>
> Reported-by: kernel test robot <[email protected]>
>
> ---
Applied to clk-next
Quoting Dario Binacchi (2022-11-13 10:11:46)
> The ti_clk_register() and ti_clk_register_omap_hw() functions are always
> called with the parameter of type "struct device" set to NULL, since the
> functions from which they are called always have a parameter of type
> "struct device_node". Replacing "struct device" type parameter with
> "struct device_node" will allow you to register a TI clock to the common
> clock framework by taking advantage of the facilities provided by the
> "struct device_node" type. Further, adding the "of_" prefix to the name
> of these functions explicitly binds them to the "struct device_node"
> type.
>
> The patch has been tested on a Beaglebone board.
>
> Signed-off-by: Dario Binacchi <[email protected]>
>
> ---
Applied to clk-next