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net: dwc_eth_qos: Add option "snps,reset-gpio" phy-rst gpio for stm32 

It can be seen that most of the Socs using STM mac, "snps,reset-gpio"
gpio is used, adding this option makes reset function more general.

Signed-off-by: David Wu <david.wu@rock-chips.com>
Change-Id: I428c7158c113143a7e51296705fabde6f05eb0f6
This commit is contained in:
David Wu 2020-04-29 18:37:12 +08:00 committed by Joseph Chen
parent dcf8de121a
commit 13105a0ba7
1 changed files with 31 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

32
drivers/net/dwc_eth_qos.c
View File

@ -313,6 +313,7 @@ struct eqos_priv {
struct eqos_tegra186_regs *tegra186_regs;
struct reset_ctl reset_ctl;
struct gpio_desc phy_reset_gpio;
u32 reset_delays[3];
struct clk clk_master_bus;
struct clk clk_rx;
struct clk clk_ptp_ref;
@ -738,6 +739,15 @@ static int eqos_start_resets_stm32(struct udevice *dev)
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, 0);
if (ret < 0) {
pr_err("dm_gpio_set_value(phy_reset, deassert) failed: %d",
ret);
return ret;
}
udelay(eqos->reset_delays[0]);
ret = dm_gpio_set_value(&eqos->phy_reset_gpio, 1);
if (ret < 0) {
pr_err("dm_gpio_set_value(phy_reset, assert) failed: %d",
@ -745,7 +755,7 @@ static int eqos_start_resets_stm32(struct udevice *dev)
return ret;
}
udelay(2);
udelay(eqos->reset_delays[1]);
ret = dm_gpio_set_value(&eqos->phy_reset_gpio, 0);
if (ret < 0) {
@ -753,6 +763,8 @@ static int eqos_start_resets_stm32(struct udevice *dev)
ret);
return ret;
}
udelay(eqos->reset_delays[2]);
}
debug("%s: OK\n", __func__);
@ -1863,11 +1875,29 @@ static int eqos_probe_resources_stm32(struct udevice *dev)
if (ret)
pr_warn("gpio_request_by_name(phy reset) not provided %d",
ret);
else
eqos->reset_delays[1] = 2;
eqos->phyaddr = ofnode_read_u32_default(phandle_args.node,
"reg", -1);
}
if (!dm_gpio_is_valid(&eqos->phy_reset_gpio)) {
int reset_flags = GPIOD_IS_OUT;
if (dev_read_bool(dev, "snps,reset-active-low"))
reset_flags |= GPIOD_ACTIVE_LOW;
ret = gpio_request_by_name(dev, "snps,reset-gpio", 0,
&eqos->phy_reset_gpio, reset_flags);
if (ret == 0)
ret = dev_read_u32_array(dev, "snps,reset-delays-us",
eqos->reset_delays, 3);
else
pr_warn("gpio_request_by_name(snps,reset-gpio) failed: %d",
ret);
}
debug("%s: OK\n", __func__);
return 0;