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net: dwc_eth_qos: implement reset-gpios for stm32

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Add management of property "reset-gpios" in the node identified by
"phy-handle" to configure any GPIO used to reset the PHY.

Signed-off-by: Christophe Roullier <christophe.roullier@st.com>
Reviewed-by: Patrice CHOTARD <patrice.chotard@st.com>
Reviewed-by: Patrick DELAUNAY <patrick.delaunay@st.com>
Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
This commit is contained in:
Christophe Roullier 2020-03-18 10:50:15 +01:00 committed by Patrice Chotard
parent 142a07f2a4
commit 5177b31ba6
1 changed files with 53 additions and 0 deletions
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53
drivers/net/dwc_eth_qos.c
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@ -694,6 +694,29 @@ static int eqos_start_resets_tegra186(struct udevice *dev)
static int eqos_start_resets_stm32(struct udevice *dev)
{
struct eqos_priv *eqos = dev_get_priv(dev);
int ret;
debug("%s(dev=%p):\n", __func__, dev);
if (dm_gpio_is_valid(&eqos->phy_reset_gpio)) {
ret = dm_gpio_set_value(&eqos->phy_reset_gpio, 1);
if (ret < 0) {
pr_err("dm_gpio_set_value(phy_reset, assert) failed: %d",
ret);
return ret;
}
udelay(2);
ret = dm_gpio_set_value(&eqos->phy_reset_gpio, 0);
if (ret < 0) {
pr_err("dm_gpio_set_value(phy_reset, deassert) failed: %d",
ret);
return ret;
}
}
debug("%s: OK\n", __func__);
return 0;
}
@ -709,6 +732,18 @@ static int eqos_stop_resets_tegra186(struct udevice *dev)
static int eqos_stop_resets_stm32(struct udevice *dev)
{
struct eqos_priv *eqos = dev_get_priv(dev);
int ret;
if (dm_gpio_is_valid(&eqos->phy_reset_gpio)) {
ret = dm_gpio_set_value(&eqos->phy_reset_gpio, 1);
if (ret < 0) {
pr_err("dm_gpio_set_value(phy_reset, assert) failed: %d",
ret);
return ret;
}
}
return 0;
}
@ -1604,6 +1639,7 @@ static int eqos_probe_resources_stm32(struct udevice *dev)
struct eqos_priv *eqos = dev_get_priv(dev);
int ret;
phy_interface_t interface;
struct ofnode_phandle_args phandle_args;
debug("%s(dev=%p):\n", __func__, dev);
@ -1641,6 +1677,20 @@ static int eqos_probe_resources_stm32(struct udevice *dev)
if (ret)
pr_warn("No phy clock provided %d", ret);
ret = dev_read_phandle_with_args(dev, "phy-handle", NULL, 0, 0,
&phandle_args);
if (!ret) {
/* search "reset-gpios" in phy node */
ret = gpio_request_by_name_nodev(phandle_args.node,
"reset-gpios", 0,
&eqos->phy_reset_gpio,
GPIOD_IS_OUT |
GPIOD_IS_OUT_ACTIVE);
if (ret)
pr_warn("gpio_request_by_name(phy reset) not provided %d",
ret);
}
debug("%s: OK\n", __func__);
return 0;
@ -1704,6 +1754,9 @@ static int eqos_remove_resources_stm32(struct udevice *dev)
if (clk_valid(&eqos->clk_ck))
clk_free(&eqos->clk_ck);
if (dm_gpio_is_valid(&eqos->phy_reset_gpio))
dm_gpio_free(dev, &eqos->phy_reset_gpio);
debug("%s: OK\n", __func__);
return 0;
}