TJA1120驱动适配linux5.15时出现软件复位错误，错误码-110

[miipo]

我在将TJA1120驱动(来自Linux6.6)适配到Linux5.15时，遇到了软件复位的问题，错误码为-110，我不清楚原因，以及不知道如何修复这个问题.

我参考了这个帖子NXP_C45_TJA11XX Driver Soft Reset Issue ，对nxp_c45_soft_reset做了修改，但没有效果，代码如下:

static int nxp_c45_soft_reset(struct phy_device *phydev)
{
int ret;

ret = phy_write_mmd(phydev, MDIO_MMD_VEND1, VEND1_DEVICE_CONTROL,
DEVICE_CONTROL_RESET);
if (ret)
return ret;

usleep_range(2000, 2050);

return phy_read_mmd_poll_timeout(phydev, MDIO_MMD_VEND1,
VEND1_DEVICE_CONTROL, ret,
!(ret & DEVICE_CONTROL_RESET), 20000,
240000, true);
}:

报错:

[ 6.188117] sunxi-mdio 4500048.mdio0: sunxi_mdio_probe() BEGIN
[ 6.265731] sunxi-mdio 4500048.mdio0: PHY ID: 0x001bb031, ADDR: 0x1b, DEVICE: 4500048.mdio0-mii:1b, DRIVER: NXP C45 TJA1120
[ 6.278218] sunxi-mdio 4500048.mdio0: sunxi_mdio_probe() SUCCESS
[ 47.166283] NXP C45 TJA1120 4500048.mdio0-mii:1b: nxp_c45_soft_reset failed: -110

[Wobaffet]

Hello,

As far as I know, tja1120 is not supported on 5.15. So did you backport the driver from the latest bsp? Is it working?

Thanks!

Best Regards.

[PavelL]

Hello @miipo ,

I can help only from device point of view.

Can you distinguish if the error code has been generated by phy_write_mmd or by phy_read_mmd_poll_timeout ?

Have you tried to increase time in usleep_range ?

Best regards,

Pavel