[PATCH 01/11] mux: core: Add of_mux_control_get helper function

Hans de Goede
2017-09-01T21:49:02Z

Currently the mux_control_get implementation only deals with getting
mux controllers on DT platforms. This commit renames the current
implementation to of_mux_control_get to reflect this and makes
mux_control_get a wrapper around of_mux_control_get.

This is a preparation patch for adding support for getting muxes on
non DT platforms.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
drivers/mux/core.c | 26 ++++++++++++++++++--------
1 file changed, 18 insertions(+), 8 deletions(-)

diff --git a/drivers/mux/core.c b/drivers/mux/core.c
index e75d5adc5949..6142493c327b 100644
--- a/drivers/mux/core.c
+++ b/drivers/mux/core.c
@@ -422,14 +422,8 @@ static struct mux_chip *of_get_mux_chip_by_node(struct device_node *np)
return dev ? to_mux_chip(dev) : NULL;
}

-/**
- * mux_control_get() - Get the mux-control for a device.
- * @dev: The device that needs a mux-control.
- * @mux_name: The name identifying the mux-control.
- *
- * Return: A pointer to the mux-control, or an ERR_PTR with a negative errno.
- */
-struct mux_control *mux_control_get(struct device *dev, const char *mux_name)
+static struct mux_control *of_mux_control_get(struct device *dev,
+ const char *mux_name)
{
struct device_node *np = dev->of_node;
struct of_phandle_args args;
@@ -483,6 +477,22 @@ struct mux_control *mux_control_get(struct device *dev, const char *mux_name)

return &mux_chip->mux[controller];
}
+
+/**
+ * mux_control_get() - Get the mux-control for a device.
+ * @dev: The device that needs a mux-control.
+ * @mux_name: The name identifying the mux-control.
+ *
+ * Return: A pointer to the mux-control, or an ERR_PTR with a negative errno.
+ */
+struct mux_control *mux_control_get(struct device *dev, const char *mux_name)
+{
+ /* look up via DT first */
+ if (IS_ENABLED(CONFIG_OF) && dev->of_node)
+ return of_mux_control_get(dev, mux_name);
+
+ return ERR_PTR(-ENODEV);
+}
EXPORT_SYMBOL_GPL(mux_control_get);

/**
--
2.13.5