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net: ravb: Add optional reset deassertion

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In order to add support for the Renesas RZ/G2L Ethernet IP in a
subsequent patch, we introduce optional de-assertion and re-assertion of
a reset signal in ravb_probe() and ravb_remove().

Signed-off-by: Paul Barker <paul.barker.ct@bp.renesas.com>
This commit is contained in:
Paul Barker
2025-03-19 12:03:58 +00:00
committed by Marek Vasut
parent ba2d1d7666
commit 46706c3427
1 changed files with 29 additions and 2 deletions
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31
drivers/net/ravb.c
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@@ -23,6 +23,7 @@
#include <asm/io.h>
#include <asm/global_data.h>
#include <asm/gpio.h>
#include <reset.h>
/* Registers */
#define RAVB_REG_CCC 0x000
@@ -111,6 +112,7 @@ struct ravb_device_ops {
void (*mac_init)(struct udevice *dev);
void (*dmac_init)(struct udevice *dev);
void (*config)(struct udevice *dev);
bool has_reset;
};
struct ravb_desc {
@@ -136,6 +138,7 @@ struct ravb_priv {
struct mii_dev *bus;
void __iomem *iobase;
struct clk_bulk clks;
struct reset_ctl rst;
};
static inline void ravb_flush_dcache(u32 addr, u32 len)
@@ -612,6 +615,8 @@ static int ravb_bb_miiphy_write(struct mii_dev *miidev, int addr,
static int ravb_probe(struct udevice *dev)
{
struct ravb_device_ops *device_ops =
(struct ravb_device_ops *)dev_get_driver_data(dev);
struct eth_pdata *pdata = dev_get_plat(dev);
struct ravb_priv *eth = dev_get_priv(dev);
struct mii_dev *mdiodev;
@@ -647,16 +652,32 @@ static int ravb_probe(struct udevice *dev)
if (ret)
goto err_clk_enable;
if (device_ops->has_reset) {
ret = reset_get_by_index(dev, 0, &eth->rst);
if (ret < 0)
goto err_clk_enable;
ret = reset_deassert(&eth->rst);
if (ret < 0)
goto err_reset_deassert;
}
ret = ravb_reset(dev);
if (ret)
goto err_clk_enable;
goto err_ravb_reset;
ret = ravb_phy_config(dev);
if (ret)
goto err_clk_enable;
goto err_ravb_reset;
return 0;
err_ravb_reset:
if (device_ops->has_reset)
reset_assert(&eth->rst);
err_reset_deassert:
if (device_ops->has_reset)
reset_free(&eth->rst);
err_clk_enable:
mdio_unregister(mdiodev);
err_mdio_register:
@@ -670,8 +691,14 @@ err_clk_get:
static int ravb_remove(struct udevice *dev)
{
struct ravb_device_ops *device_ops =
(struct ravb_device_ops *)dev_get_driver_data(dev);
struct ravb_priv *eth = dev_get_priv(dev);
if (device_ops->has_reset) {
reset_assert(&eth->rst);
reset_free(&eth->rst);
}
clk_release_bulk(&eth->clks);
free(eth->phydev);