net: fec_mxc: Add board_interface_eth_init() for i.MX8M Mini/Nano/Plus
Implement common board_interface_eth_init() and call it from the FEC
driver to configure IOMUXC GPR[1] register according to the PHY mode
obtained from DT. This supports all three interface modes supported by
the i.MX8M Mini/Nano/Plus FEC and supersedes the current board-side
configuration of the same IOMUX GPR[1] duplicated in the board files.
Signed-off-by: Marek Vasut <marex@denx.de>
diff --git a/arch/arm/mach-imx/imx8m/clock_imx8mm.c b/arch/arm/mach-imx/imx8m/clock_imx8mm.c
index 1546c9b..32f8623 100644
--- a/arch/arm/mach-imx/imx8m/clock_imx8mm.c
+++ b/arch/arm/mach-imx/imx8m/clock_imx8mm.c
@@ -968,10 +968,56 @@
return 0;
}
+
+static int imx8mp_fec_interface_init(struct udevice *dev,
+ phy_interface_t interface_type,
+ bool mx8mp)
+{
+ /* i.MX8MP has extra RGMII_EN bit in IOMUXC GPR1 register */
+ const u32 rgmii_en = mx8mp ? IOMUXC_GPR_GPR1_GPR_ENET1_RGMII_EN : 0;
+ struct iomuxc_gpr_base_regs *gpr =
+ (struct iomuxc_gpr_base_regs *)IOMUXC_GPR_BASE_ADDR;
+
+ clrbits_le32(&gpr->gpr[1],
+ rgmii_en |
+ IOMUXC_GPR_GPR1_GPR_ENET1_TX_CLK_SEL);
+
+ switch (interface_type) {
+ case PHY_INTERFACE_MODE_MII:
+ case PHY_INTERFACE_MODE_RMII:
+ setbits_le32(&gpr->gpr[1], IOMUXC_GPR_GPR1_GPR_ENET1_TX_CLK_SEL);
+ break;
+ case PHY_INTERFACE_MODE_RGMII:
+ case PHY_INTERFACE_MODE_RGMII_ID:
+ case PHY_INTERFACE_MODE_RGMII_RXID:
+ case PHY_INTERFACE_MODE_RGMII_TXID:
+ setbits_le32(&gpr->gpr[1], rgmii_en);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
#endif
int board_interface_eth_init(struct udevice *dev, phy_interface_t interface_type)
{
+ if (IS_ENABLED(CONFIG_IMX8MM) &&
+ IS_ENABLED(CONFIG_FEC_MXC) &&
+ device_is_compatible(dev, "fsl,imx8mm-fec"))
+ return imx8mp_fec_interface_init(dev, interface_type, false);
+
+ if (IS_ENABLED(CONFIG_IMX8MN) &&
+ IS_ENABLED(CONFIG_FEC_MXC) &&
+ device_is_compatible(dev, "fsl,imx8mn-fec"))
+ return imx8mp_fec_interface_init(dev, interface_type, false);
+
+ if (IS_ENABLED(CONFIG_IMX8MP) &&
+ IS_ENABLED(CONFIG_FEC_MXC) &&
+ device_is_compatible(dev, "fsl,imx8mp-fec"))
+ return imx8mp_fec_interface_init(dev, interface_type, true);
+
if (IS_ENABLED(CONFIG_IMX8MP) &&
IS_ENABLED(CONFIG_DWC_ETH_QOS) &&
device_is_compatible(dev, "nxp,imx8mp-dwmac-eqos"))