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Allwinner: linux: Fix patch for ethernet PHY regulators

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This commit is contained in:
Jernej Skrabec 2023-12-17 10:55:30 +01:00
parent 1833aeed55
commit 5196c3da4d
1 changed files with 88 additions and 68 deletions
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156
projects/Allwinner/patches/linux/0026-phy-handle-optional-regulator-for-PHY.patch
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@ -1,21 +1,23 @@
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From 25b44143ea8162209beb02759ca3ea3bd3be7a74 Mon Sep 17 00:00:00 2001
From: Corentin Labbe <clabbe.montjoie@gmail.com>
Date: Fri, 14 Oct 2022 12:54:21 +0200
Subject: [PATCH] phy: handle optional regulator for PHY
Add handling of optional regulators for PHY.
Regulators need to be enabled before PHY scanning, so MDIO bus
initiate this task.
Signed-off-by: Corentin Labbe <clabbe.montjoie@gmail.com>
Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>
---
drivers/net/mdio/fwnode_mdio.c | 31 ++++++++++++++++++++++++++++++-
drivers/net/phy/phy_device.c | 13 +++++++++++++
include/linux/phy.h | 3 +++
3 files changed, 46 insertions(+), 1 deletion(-)
drivers/net/mdio/fwnode_mdio.c | 53 ++++++++++++++++++++++++++++++++--
drivers/net/phy/phy_device.c | 6 ++++
include/linux/phy.h | 3 ++
3 files changed, 60 insertions(+), 2 deletions(-)
diff --git a/drivers/net/mdio/fwnode_mdio.c b/drivers/net/mdio/fwnode_mdio.c
index 1183ef5e203e..7ef42098df6e 100644
index fd02f5cbc853..bd5a27eaf40c 100644
--- a/drivers/net/mdio/fwnode_mdio.c
+++ b/drivers/net/mdio/fwnode_mdio.c
@@ -11,6 +11,7 @@
@ -26,45 +28,81 @@ index 1183ef5e203e..7ef42098df6e 100644
MODULE_AUTHOR("Calvin Johnson <calvin.johnson@oss.nxp.com>");
MODULE_LICENSE("GPL");
@@ -117,7 +118,9 @@ int fwnode_mdiobus_register_phy(struct mii_bus *bus,
@@ -58,6 +59,40 @@ fwnode_find_mii_timestamper(struct fwnode_handle *fwnode)
return register_mii_timestamper(arg.np, arg.args[0]);
}
+static int
+fwnode_regulator_get_bulk_enabled(struct device *dev,
+ struct fwnode_handle *fwnode,
+ struct regulator_bulk_data **consumers)
+{
+ struct device_node *np;
+ int ret, reg_cnt;
+
+ np = to_of_node(fwnode);
+ if (!np)
+ return 0;
+
+ reg_cnt = of_regulator_bulk_get_all(dev, np, consumers);
+ if (reg_cnt < 0) {
+ ret = reg_cnt;
+ goto clean_consumers;
+ }
+
+ if (reg_cnt == 0)
+ return 0;
+
+ ret = regulator_bulk_enable(reg_cnt, *consumers);
+ if (ret)
+ goto clean_consumers;
+
+ return reg_cnt;
+
+clean_consumers:
+ kfree(*consumers);
+ *consumers = NULL;
+
+ return ret;
+}
+
int fwnode_mdiobus_phy_device_register(struct mii_bus *mdio,
struct phy_device *phy,
struct fwnode_handle *child, u32 addr)
@@ -113,12 +148,13 @@ EXPORT_SYMBOL(fwnode_mdiobus_phy_device_register);
int fwnode_mdiobus_register_phy(struct mii_bus *bus,
struct fwnode_handle *child, u32 addr)
{
+ struct regulator_bulk_data *consumers = NULL;
struct mii_timestamper *mii_ts = NULL;
struct pse_control *psec = NULL;
struct phy_device *phy;
+ int rc, reg_cnt;
bool is_c45;
u32 phy_id;
- int rc;
+ struct device_node __maybe_unused *nchild = NULL;
+ struct regulator_bulk_data *consumers = NULL;
+ int rc, reg_cnt = 0;
psec = fwnode_find_pse_control(child);
if (IS_ERR(psec))
@@ -129,6 +132,25 @@ int fwnode_mdiobus_register_phy(struct mii_bus *bus,
@@ -130,6 +166,12 @@ int fwnode_mdiobus_register_phy(struct mii_bus *bus,
goto clean_pse;
}
+ for_each_child_of_node(bus->dev.of_node, nchild) {
+ u32 reg;
+
+ of_property_read_u32(nchild, "reg", &reg);
+ if (reg != addr)
+ continue;
+ reg_cnt = of_regulator_bulk_get_all(&bus->dev, nchild, &consumers);
+ if (reg_cnt > 0) {
+ rc = regulator_bulk_enable(reg_cnt, consumers);
+ if (rc)
+ goto clean_kfree;
+ }
+ if (reg_cnt < 0) {
+ dev_err(&bus->dev, "Fail to regulator_bulk_get_all err=%d\n", reg_cnt);
+ rc = reg_cnt;
+ goto clean_kfree;
+ }
+ reg_cnt = fwnode_regulator_get_bulk_enabled(&bus->dev, child, &consumers);
+ if (reg_cnt < 0) {
+ rc = reg_cnt;
+ goto clean_mii_ts;
+ }
+
is_c45 = fwnode_device_is_compatible(child, "ethernet-phy-ieee802.3-c45");
if (is_c45 || fwnode_get_phy_id(child, &phy_id))
phy = get_phy_device(bus, addr, is_c45);
@@ -139,6 +161,9 @@ int fwnode_mdiobus_register_phy(struct mii_bus *bus,
goto clean_mii_ts;
@@ -137,9 +179,12 @@ int fwnode_mdiobus_register_phy(struct mii_bus *bus,
phy = phy_device_create(bus, addr, phy_id, 0, NULL);
if (IS_ERR(phy)) {
rc = PTR_ERR(phy);
- goto clean_mii_ts;
+ goto clean_regulators;
}
+ phy->regulator_cnt = reg_cnt;
@ -73,67 +111,46 @@ index 1183ef5e203e..7ef42098df6e 100644
if (is_acpi_node(child)) {
phy->irq = bus->irq[addr];
@@ -178,6 +203,10 @@ int fwnode_mdiobus_register_phy(struct mii_bus *bus,
clean_pse:
pse_control_put(psec);
@@ -174,6 +219,10 @@ int fwnode_mdiobus_register_phy(struct mii_bus *bus,
clean_phy:
phy_device_free(phy);
+clean_regulators:
+ if (reg_cnt > 0)
+ regulator_bulk_disable(reg_cnt, consumers);
+clean_kfree:
+ kfree(consumers);
return rc;
}
EXPORT_SYMBOL(fwnode_mdiobus_register_phy);
clean_mii_ts:
unregister_mii_timestamper(mii_ts);
clean_pse:
diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c
index c7cf61fe41cf..3bfe9bf6b3ac 100644
index 2ce74593d6e4..31b6913ceed1 100644
--- a/drivers/net/phy/phy_device.c
+++ b/drivers/net/phy/phy_device.c
@@ -30,6 +30,7 @@
@@ -31,6 +31,7 @@
#include <linux/phy_led_triggers.h>
#include <linux/pse-pd/pse.h>
#include <linux/property.h>
#include <linux/rtnetlink.h>
+#include <linux/regulator/consumer.h>
#include <linux/rtnetlink.h>
#include <linux/sfp.h>
#include <linux/skbuff.h>
#include <linux/slab.h>
@@ -1871,6 +1872,9 @@ int phy_suspend(struct phy_device *phydev)
if (!ret)
phydev->suspended = true;
@@ -3400,6 +3401,11 @@ static int phy_remove(struct device *dev)
phydev->drv = NULL;
+ if (phydev->regulator_cnt > 0)
+ regulator_bulk_disable(phydev->regulator_cnt, phydev->consumers);
+
return ret;
}
EXPORT_SYMBOL(phy_suspend);
@@ -1897,6 +1901,12 @@ int phy_resume(struct phy_device *phydev)
{
int ret;
+ if (phydev->regulator_cnt > 0) {
+ ret = regulator_bulk_enable(phydev->regulator_cnt, phydev->consumers);
+ if (ret)
+ return ret;
+ }
+
mutex_lock(&phydev->lock);
ret = __phy_resume(phydev);
mutex_unlock(&phydev->lock);
@@ -3332,6 +3342,9 @@ static int phy_remove(struct device *dev)
phydev->drv = NULL;
+ if (phydev->consumers)
+ kfree(phydev->consumers);
+ kfree(phydev->consumers);
+
return 0;
}
diff --git a/include/linux/phy.h b/include/linux/phy.h
index 11c1e91563d4..2d058595d1a1 100644
index 3cc52826f18e..832cb2d4f76a 100644
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -752,6 +752,9 @@ struct phy_device {
@@ -757,6 +757,9 @@ struct phy_device {
void (*phy_link_change)(struct phy_device *phydev, bool up);
void (*adjust_link)(struct net_device *dev);
@ -143,3 +160,6 @@ index 11c1e91563d4..2d058595d1a1 100644
#if IS_ENABLED(CONFIG_MACSEC)
/* MACsec management functions */
const struct macsec_ops *macsec_ops;
--
2.43.0