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net: fec_mxc: Add ref clock setup support for i.MX8M Mini/Nano/Plus

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The FEC ref clock frequency on i.MX8M Mini/Nano/Plus was so far configured
via ad-hoc board code. Replace that with DM clock clk_set_rate() instead.
This way, the driver claims all its required clock and sets the ref clock
rate, without any need of architecture specific register fiddling.

Signed-off-by: Marek Vasut <marex@denx.de>
This commit is contained in:
Marek Vasut
2023-03-06 15:53:50 +01:00
committed by Stefano Babic
parent f9e950b9bf
commit 80a34e4008
1 changed files with 32 additions and 0 deletions
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32
drivers/net/fec_mxc.c
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@@ -1196,6 +1196,33 @@ static void fec_gpio_reset(struct fec_priv *priv)
}
#endif
static int fecmxc_set_ref_clk(struct clk *clk_ref, phy_interface_t interface)
{
unsigned int freq;
int ret;
if (!CONFIG_IS_ENABLED(CLK_CCF))
return 0;
if (interface == PHY_INTERFACE_MODE_MII)
freq = 25000000;
else if (interface == PHY_INTERFACE_MODE_RMII)
freq = 50000000;
else if (interface == PHY_INTERFACE_MODE_RGMII ||
interface == PHY_INTERFACE_MODE_RGMII_ID ||
interface == PHY_INTERFACE_MODE_RGMII_RXID ||
interface == PHY_INTERFACE_MODE_RGMII_TXID)
freq = 125000000;
else
return -EINVAL;
ret = clk_set_rate(clk_ref, freq);
if (ret < 0)
return ret;
return 0;
}
static int fecmxc_probe(struct udevice *dev)
{
bool dm_mii_bus = true;
@@ -1253,6 +1280,11 @@ static int fecmxc_probe(struct udevice *dev)
ret = clk_get_by_name(dev, "enet_clk_ref", &priv->clk_ref);
if (!ret) {
ret = fecmxc_set_ref_clk(&priv->clk_ref,
pdata->phy_interface);
if (ret)
return ret;
ret = clk_enable(&priv->clk_ref);
if (ret)
return ret;