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net: introduce helpers to get PHY ofnode from MAC

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Add helpers ofnode_get_phy_node() and dev_get_phy_node() and use it in
net/mdio-uclass.c function dm_eth_connect_phy_handle(). Also add
corresponding UT test.

This is useful because other part's of U-Boot may want to get PHY ofnode
without connecting a PHY.

Signed-off-by: Marek Behún <marek.behun@nic.cz>
Reviewed-by: Ramon Fried <rfried.dev@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Marek Behún 2022-04-07 00:32:57 +02:00 committed by Ramon Fried
parent a7a96ef812
commit f3dd213e15
7 changed files with 96 additions and 18 deletions
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13
arch/sandbox/dts/test.dts
View file

@ -530,6 +530,13 @@
fake-host-hwaddr = [00 00 66 44 22 22];
};
phy_eth0: phy-test-eth {
compatible = "sandbox,eth";
reg = <0x10007000 0x1000>;
fake-host-hwaddr = [00 00 66 44 22 77];
phy-handle = <&ethphy1>;
};
dsa_eth0: dsa-test-eth {
compatible = "sandbox,eth";
reg = <0x10006000 0x1000>;
@ -1555,6 +1562,12 @@
mdio: mdio-test {
compatible = "sandbox,mdio";
#address-cells = <1>;
#size-cells = <0>;
ethphy1: ethernet-phy@1 {
reg = <1>;
};
};
pm-bus-test {

21
drivers/core/ofnode.c
View file

@ -1198,3 +1198,24 @@ const char *ofnode_conf_read_str(const char *prop_name)
return ofnode_read_string(node, prop_name);
}
ofnode ofnode_get_phy_node(ofnode node)
{
/* DT node properties that reference a PHY node */
static const char * const phy_handle_str[] = {
"phy-handle", "phy", "phy-device",
};
struct ofnode_phandle_args args = {
.node = ofnode_null()
};
int i;
assert(ofnode_valid(node));
for (i = 0; i < ARRAY_SIZE(phy_handle_str); i++)
if (!ofnode_parse_phandle_with_args(node, phy_handle_str[i],
NULL, 0, 0, &args))
break;
return args.node;
}

5
drivers/core/read.c
View file

@ -398,3 +398,8 @@ int dev_decode_display_timing(const struct udevice *dev, int index,
{
return ofnode_decode_display_timing(dev_ofnode(dev), index, config);
}
ofnode dev_get_phy_node(const struct udevice *dev)
{
return ofnode_get_phy_node(dev_ofnode(dev));
}

14
include/dm/ofnode.h
View file

@ -1217,4 +1217,18 @@ int ofnode_conf_read_int(const char *prop_name, int default_val);
*/
const char *ofnode_conf_read_str(const char *prop_name);
/**
* ofnode_get_phy_node() - Get PHY node for a MAC (if not fixed-link)
*
* This function parses PHY handle from the Ethernet controller's ofnode
* (trying all possible PHY handle property names), and returns the PHY ofnode.
*
* Before this is used, ofnode_phy_is_fixed_link() should be checked first, and
* if the result to that is true, this function should not be called.
*
* @eth_node: ofnode belonging to the Ethernet controller
* Return: ofnode of the PHY, if it exists, otherwise an invalid ofnode
*/
ofnode ofnode_get_phy_node(ofnode eth_node);
#endif

19
include/dm/read.h
View file

@ -743,6 +743,20 @@ int dev_read_pci_bus_range(const struct udevice *dev, struct resource *res);
int dev_decode_display_timing(const struct udevice *dev, int index,
struct display_timing *config);
/**
* dev_get_phy_node() - Get PHY node for a MAC (if not fixed-link)
*
* This function parses PHY handle from the Ethernet controller's ofnode
* (trying all possible PHY handle property names), and returns the PHY ofnode.
*
* Before this is used, ofnode_phy_is_fixed_link() should be checked first, and
* if the result to that is true, this function should not be called.
*
* @dev: device representing the MAC
* Return: ofnode of the PHY, if it exists, otherwise an invalid ofnode
*/
ofnode dev_get_phy_node(const struct udevice *dev);
#else /* CONFIG_DM_DEV_READ_INLINE is enabled */
#include <asm/global_data.h>
@ -1092,6 +1106,11 @@ static inline int dev_decode_display_timing(const struct udevice *dev,
return ofnode_decode_display_timing(dev_ofnode(dev), index, config);
}
static inline ofnode dev_get_phy_node(const struct udevice *dev)
{
return ofnode_get_phy_node(dev_ofnode(dev));
}
#endif /* CONFIG_DM_DEV_READ_INLINE */
/**

24
net/mdio-uclass.c
View file

@ -20,11 +20,6 @@ static const char * const phy_mode_str[] = {
"phy-mode", "phy-connection-type"
};
/* DT node properties that reference a PHY node */
static const char * const phy_handle_str[] = {
"phy-handle", "phy", "phy-device"
};
void dm_mdio_probe_devices(void)
{
struct udevice *it;
@ -137,23 +132,16 @@ static struct phy_device *dm_eth_connect_phy_handle(struct udevice *ethdev,
u32 phy_addr;
struct udevice *mdiodev;
struct phy_device *phy;
struct ofnode_phandle_args phandle = {.node = ofnode_null()};
ofnode phynode;
int i;
if (CONFIG_IS_ENABLED(PHY_FIXED) &&
ofnode_phy_is_fixed_link(dev_ofnode(ethdev), &phynode)) {
phy = phy_connect(NULL, 0, ethdev, interface);
phandle.node = phynode;
goto out;
}
for (i = 0; i < ARRAY_SIZE(phy_handle_str); i++)
if (!dev_read_phandle_with_args(ethdev, phy_handle_str[i], NULL,
0, 0, &phandle))
break;
if (!ofnode_valid(phandle.node)) {
phynode = dev_get_phy_node(ethdev);
if (!ofnode_valid(phynode)) {
dev_dbg(ethdev, "can't find PHY node\n");
return NULL;
}
@ -162,16 +150,16 @@ static struct phy_device *dm_eth_connect_phy_handle(struct udevice *ethdev,
* reading 'reg' directly should be fine. This is a PHY node, the
* address is always size 1 and requires no translation
*/
if (ofnode_read_u32(phandle.node, "reg", &phy_addr)) {
if (ofnode_read_u32(phynode, "reg", &phy_addr)) {
dev_dbg(ethdev, "missing reg property in phy node\n");
return NULL;
}
if (uclass_get_device_by_ofnode(UCLASS_MDIO,
ofnode_get_parent(phandle.node),
ofnode_get_parent(phynode),
&mdiodev)) {
dev_dbg(ethdev, "can't find MDIO bus for node %s\n",
ofnode_get_name(ofnode_get_parent(phandle.node)));
ofnode_get_name(ofnode_get_parent(phynode)));
return NULL;
}
@ -179,7 +167,7 @@ static struct phy_device *dm_eth_connect_phy_handle(struct udevice *ethdev,
out:
if (phy)
phy->node = phandle.node;
phy->node = phynode;
return phy;
}

18
test/dm/ofnode.c
View file

@ -447,3 +447,21 @@ static int dm_test_ofnode_string_err(struct unit_test_state *uts)
return 0;
}
DM_TEST(dm_test_ofnode_string_err, UT_TESTF_LIVE_TREE);
static int dm_test_ofnode_get_phy(struct unit_test_state *uts)
{
ofnode eth_node, phy_node;
u32 reg;
eth_node = ofnode_path("/phy-test-eth");
ut_assert(ofnode_valid(eth_node));
phy_node = ofnode_get_phy_node(eth_node);
ut_assert(ofnode_valid(phy_node));
reg = ofnode_read_u32_default(phy_node, "reg", -1U);
ut_asserteq_64(0x1, reg);
return 0;
}
DM_TEST(dm_test_ofnode_get_phy, 0);