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Subject[PATCH v2 net-next] net: stmmac: move reset gpio parse & request to stmmac_mdio_register
Date
Move the reset gpio dt parse and request to stmmac_mdio_register(),
thus makes the mdio code straightforward.

This patch also replace stack var mdio_bus_data with data to simplify
the code.

Signed-off-by: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
---
Since v1:
- rebase on the latest net-next tree

.../net/ethernet/stmicro/stmmac/stmmac_mdio.c | 58 ++++++++-----------
1 file changed, 25 insertions(+), 33 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c
index 093a223fe408..7d1562ec1149 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_mdio.c
@@ -250,28 +250,7 @@ int stmmac_mdio_reset(struct mii_bus *bus)
struct stmmac_mdio_bus_data *data = priv->plat->mdio_bus_data;

#ifdef CONFIG_OF
- if (priv->device->of_node) {
- if (data->reset_gpio < 0) {
- struct device_node *np = priv->device->of_node;
-
- if (!np)
- return 0;
-
- data->reset_gpio = of_get_named_gpio(np,
- "snps,reset-gpio", 0);
- if (data->reset_gpio < 0)
- return 0;
-
- data->active_low = of_property_read_bool(np,
- "snps,reset-active-low");
- of_property_read_u32_array(np,
- "snps,reset-delays-us", data->delays, 3);
-
- if (devm_gpio_request(priv->device, data->reset_gpio,
- "mdio-reset"))
- return 0;
- }
-
+ if (gpio_is_valid(data->reset_gpio)) {
gpio_direction_output(data->reset_gpio,
data->active_low ? 1 : 0);
if (data->delays[0])
@@ -313,24 +292,38 @@ int stmmac_mdio_register(struct net_device *ndev)
int err = 0;
struct mii_bus *new_bus;
struct stmmac_priv *priv = netdev_priv(ndev);
- struct stmmac_mdio_bus_data *mdio_bus_data = priv->plat->mdio_bus_data;
+ struct stmmac_mdio_bus_data *data = priv->plat->mdio_bus_data;
struct device_node *mdio_node = priv->plat->mdio_node;
struct device *dev = ndev->dev.parent;
int addr, found, max_addr;

- if (!mdio_bus_data)
+ if (!data)
return 0;

new_bus = mdiobus_alloc();
if (!new_bus)
return -ENOMEM;

- if (mdio_bus_data->irqs)
- memcpy(new_bus->irq, mdio_bus_data->irqs, sizeof(new_bus->irq));
+ if (data->irqs)
+ memcpy(new_bus->irq, data->irqs, sizeof(new_bus->irq));

#ifdef CONFIG_OF
- if (priv->device->of_node)
- mdio_bus_data->reset_gpio = -1;
+ if (priv->device->of_node) {
+ struct device_node *np = priv->device->of_node;
+
+ data->reset_gpio = of_get_named_gpio(np, "snps,reset-gpio", 0);
+ if (gpio_is_valid(data->reset_gpio)) {
+ data->active_low = of_property_read_bool(np,
+ "snps,reset-active-low");
+ of_property_read_u32_array(np,
+ "snps,reset-delays-us", data->delays, 3);
+
+ devm_gpio_request(priv->device, data->reset_gpio,
+ "mdio-reset");
+ }
+ } else {
+ data->reset_gpio = -1;
+ }
#endif

new_bus->name = "stmmac";
@@ -356,7 +349,7 @@ int stmmac_mdio_register(struct net_device *ndev)
snprintf(new_bus->id, MII_BUS_ID_SIZE, "%s-%x",
new_bus->name, priv->plat->bus_id);
new_bus->priv = ndev;
- new_bus->phy_mask = mdio_bus_data->phy_mask;
+ new_bus->phy_mask = data->phy_mask;
new_bus->parent = priv->device;

err = of_mdiobus_register(new_bus, mdio_node);
@@ -379,10 +372,9 @@ int stmmac_mdio_register(struct net_device *ndev)
* If an IRQ was provided to be assigned after
* the bus probe, do it here.
*/
- if (!mdio_bus_data->irqs &&
- (mdio_bus_data->probed_phy_irq > 0)) {
- new_bus->irq[addr] = mdio_bus_data->probed_phy_irq;
- phydev->irq = mdio_bus_data->probed_phy_irq;
+ if (!data->irqs && (data->probed_phy_irq > 0)) {
+ new_bus->irq[addr] = data->probed_phy_irq;
+ phydev->irq = data->probed_phy_irq;
}

/*
--
2.20.1
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