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Message-Id: <20190226223429.193873-5-sboyd@kernel.org>
Date: Tue, 26 Feb 2019 14:34:25 -0800
From: Stephen Boyd <sboyd@...nel.org>
To: Michael Turquette <mturquette@...libre.com>,
Stephen Boyd <sboyd@...nel.org>
Cc: linux-kernel@...r.kernel.org, linux-clk@...r.kernel.org,
Miquel Raynal <miquel.raynal@...tlin.com>,
Jerome Brunet <jbrunet@...libre.com>,
Russell King <linux@...linux.org.uk>,
Jeffrey Hugo <jhugo@...eaurora.org>,
Chen-Yu Tsai <wens@...e.org>
Subject: [PATCH v2 4/8] clk: Inform the core about consumer devices
We'd like to have a pointer to the device that's consuming a particular
clk in the clk framework so we can link the consumer to the clk provider
with a PM device link. Add a device argument to clk_hw_create_clk() for
this so it can be used in subsequent patches to add and remove the link.
Cc: Miquel Raynal <miquel.raynal@...tlin.com>
Cc: Jerome Brunet <jbrunet@...libre.com>
Cc: Russell King <linux@...linux.org.uk>
Cc: Michael Turquette <mturquette@...libre.com>
Cc: Jeffrey Hugo <jhugo@...eaurora.org>
Cc: Chen-Yu Tsai <wens@...e.org>
Signed-off-by: Stephen Boyd <sboyd@...nel.org>
---
drivers/clk/clk.c | 7 +++++--
drivers/clk/clk.h | 7 +++++--
drivers/clk/clkdev.c | 16 +++++++++++-----
3 files changed, 21 insertions(+), 9 deletions(-)
diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index 04288063847b..8244ef2ba977 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -82,6 +82,7 @@ struct clk_core {
struct clk {
struct clk_core *core;
+ struct device *dev;
const char *dev_id;
const char *con_id;
unsigned long min_rate;
@@ -3273,6 +3274,7 @@ static void free_clk(struct clk *clk)
/**
* clk_hw_create_clk: Allocate and link a clk consumer to a clk_core given
* a clk_hw
+ * @dev: clk consumer device
* @hw: clk_hw associated with the clk being consumed
* @dev_id: string describing device name
* @con_id: connection ID string on device
@@ -3281,7 +3283,7 @@ static void free_clk(struct clk *clk)
* consumers. It connects a consumer to the clk_core and clk_hw structures
* used by the framework and clk provider respectively.
*/
-struct clk *clk_hw_create_clk(struct clk_hw *hw,
+struct clk *clk_hw_create_clk(struct device *dev, struct clk_hw *hw,
const char *dev_id, const char *con_id)
{
struct clk *clk;
@@ -3295,6 +3297,7 @@ struct clk *clk_hw_create_clk(struct clk_hw *hw,
clk = alloc_clk(core, dev_id, con_id);
if (IS_ERR(clk))
return clk;
+ clk->dev = dev;
if (!try_module_get(core->owner)) {
free_clk(clk);
@@ -4149,7 +4152,7 @@ struct clk *of_clk_get_from_provider(struct of_phandle_args *clkspec)
{
struct clk_hw *hw = of_clk_get_hw_from_clkspec(clkspec);
- return clk_hw_create_clk(hw, NULL, __func__);
+ return clk_hw_create_clk(NULL, hw, NULL, __func__);
}
EXPORT_SYMBOL_GPL(of_clk_get_from_provider);
diff --git a/drivers/clk/clk.h b/drivers/clk/clk.h
index 5a0ca0e3c1f1..5ea2185e57a1 100644
--- a/drivers/clk/clk.h
+++ b/drivers/clk/clk.h
@@ -5,6 +5,8 @@
*/
struct clk_hw;
+struct device;
+struct of_phandle_args;
#if defined(CONFIG_OF) && defined(CONFIG_COMMON_CLK)
int of_parse_clkspec(const struct device_node *np, int index, const char *name,
@@ -13,13 +15,14 @@ struct clk_hw *of_clk_get_hw_from_clkspec(struct of_phandle_args *clkspec);
#endif
#ifdef CONFIG_COMMON_CLK
-struct clk *clk_hw_create_clk(struct clk_hw *hw,
+struct clk *clk_hw_create_clk(struct device *dev, struct clk_hw *hw,
const char *dev_id, const char *con_id);
void __clk_put(struct clk *clk);
#else
/* All these casts to avoid ifdefs in clkdev... */
static inline struct clk *
-clk_hw_create_clk(struct clk_hw *hw, const char *dev_id, const char *con_id)
+clk_hw_create_clk(struct device *dev, struct clk_hw *hw, const char *dev_id,
+ const char *con_id)
{
return (struct clk *)hw;
}
diff --git a/drivers/clk/clkdev.c b/drivers/clk/clkdev.c
index 5ebb2119c0b9..f2f4f2afd28c 100644
--- a/drivers/clk/clkdev.c
+++ b/drivers/clk/clkdev.c
@@ -51,7 +51,7 @@ static struct clk *__of_clk_get(struct device_node *np,
{
struct clk_hw *hw = of_clk_get_hw(np, index, con_id);
- return clk_hw_create_clk(hw, dev_id, con_id);
+ return clk_hw_create_clk(NULL, hw, dev_id, con_id);
}
struct clk *of_clk_get(struct device_node *np, int index)
@@ -130,7 +130,8 @@ static struct clk_lookup *clk_find(const char *dev_id, const char *con_id)
return cl;
}
-struct clk *clk_get_sys(const char *dev_id, const char *con_id)
+static struct clk *__clk_get_sys(struct device *dev, const char *dev_id,
+ const char *con_id)
{
struct clk_lookup *cl;
struct clk *clk = NULL;
@@ -141,7 +142,7 @@ struct clk *clk_get_sys(const char *dev_id, const char *con_id)
if (!cl)
goto out;
- clk = clk_hw_create_clk(cl->clk_hw, dev_id, con_id);
+ clk = clk_hw_create_clk(dev, cl->clk_hw, dev_id, con_id);
if (IS_ERR(clk))
cl = NULL;
out:
@@ -149,6 +150,11 @@ struct clk *clk_get_sys(const char *dev_id, const char *con_id)
return cl ? clk : ERR_PTR(-ENOENT);
}
+
+struct clk *clk_get_sys(const char *dev_id, const char *con_id)
+{
+ return __clk_get_sys(NULL, dev_id, con_id);
+}
EXPORT_SYMBOL(clk_get_sys);
struct clk *clk_get(struct device *dev, const char *con_id)
@@ -159,10 +165,10 @@ struct clk *clk_get(struct device *dev, const char *con_id)
if (dev && dev->of_node) {
hw = of_clk_get_hw(dev->of_node, 0, con_id);
if (!IS_ERR(hw) || PTR_ERR(hw) == -EPROBE_DEFER)
- return clk_hw_create_clk(hw, dev_id, con_id);
+ return clk_hw_create_clk(dev, hw, dev_id, con_id);
}
- return clk_get_sys(dev_id, con_id);
+ return __clk_get_sys(dev, dev_id, con_id);
}
EXPORT_SYMBOL(clk_get);
--
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