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net: mdio-mux: add mdio_mux parameter to mdio_mux_init()

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mdio_mux_init() use the parameter dev for two distinct thing:
1) Have a device for all devm_ functions
2) Get device_node from it

Since it is two distinct purpose, this patch add a parameter mdio_mux
that is linked to task 2.

This will also permit to register an of_node mdio-mux that lacks a direct
owning device.
For example a mdio-mux which is a subnode of a real device.

Signed-off-by: Corentin Labbe <clabbe.montjoie@gmail.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Corentin Labbe 2017-09-04 18:30:14 +02:00 committed by David S. Miller
parent fdade4f69e
commit 5482a978b9
5 changed files with 17 additions and 6 deletions
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2
drivers/net/phy/mdio-mux-bcm-iproc.c
View File

@ -199,7 +199,7 @@ static int mdio_mux_iproc_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, md);
rc = mdio_mux_init(md->dev, mdio_mux_iproc_switch_fn,
rc = mdio_mux_init(md->dev, md->dev->of_node, mdio_mux_iproc_switch_fn,
&md->mux_handle, md, md->mii_bus);
if (rc) {
dev_info(md->dev, "mdiomux initialization failed\n");

2
drivers/net/phy/mdio-mux-gpio.c
View File

@ -54,7 +54,7 @@ static int mdio_mux_gpio_probe(struct platform_device *pdev)
if (IS_ERR(s->gpios))
return PTR_ERR(s->gpios);
r = mdio_mux_init(&pdev->dev,
r = mdio_mux_init(&pdev->dev, pdev->dev.of_node,
mdio_mux_gpio_switch_fn, &s->mux_handle, s, NULL);
if (r != 0) {

3
drivers/net/phy/mdio-mux-mmioreg.c
View File

@ -159,7 +159,8 @@ static int mdio_mux_mmioreg_probe(struct platform_device *pdev)
}
}
ret = mdio_mux_init(&pdev->dev, mdio_mux_mmioreg_switch_fn,
ret = mdio_mux_init(&pdev->dev, pdev->dev.of_node,
mdio_mux_mmioreg_switch_fn,
&s->mux_handle, s, NULL);
if (ret) {
dev_err(&pdev->dev, "failed to register mdio-mux bus %pOF\n",

7
drivers/net/phy/mdio-mux.c
View File

@ -86,6 +86,7 @@ static int mdio_mux_write(struct mii_bus *bus, int phy_id,
static int parent_count;
int mdio_mux_init(struct device *dev,
struct device_node *mux_node,
int (*switch_fn)(int cur, int desired, void *data),
void **mux_handle,
void *data,
@ -98,11 +99,11 @@ int mdio_mux_init(struct device *dev,
struct mdio_mux_parent_bus *pb;
struct mdio_mux_child_bus *cb;
if (!dev->of_node)
if (!mux_node)
return -ENODEV;
if (!mux_bus) {
parent_bus_node = of_parse_phandle(dev->of_node,
parent_bus_node = of_parse_phandle(mux_node,
"mdio-parent-bus", 0);
if (!parent_bus_node)
@ -132,7 +133,7 @@ int mdio_mux_init(struct device *dev,
pb->mii_bus = parent_bus;
ret_val = -ENODEV;
for_each_available_child_of_node(dev->of_node, child_bus_node) {
for_each_available_child_of_node(mux_node, child_bus_node) {
int v;
r = of_property_read_u32(child_bus_node, "reg", &v);

9
include/linux/mdio-mux.h
View File

@ -12,7 +12,16 @@
#include <linux/device.h>
#include <linux/phy.h>
/* mdio_mux_init() - Initialize a MDIO mux
* @dev The device owning the MDIO mux
* @mux_node The device node of the MDIO mux
* @switch_fn The function called for switching target MDIO child
* mux_handle A pointer to a (void *) used internaly by mdio-mux
* @data Private data used by switch_fn()
* @mux_bus An optional parent bus (Other case are to use parent_bus property)
*/
int mdio_mux_init(struct device *dev,
struct device_node *mux_node,
int (*switch_fn) (int cur, int desired, void *data),
void **mux_handle,
void *data,