On 05/14/2018 01:04 PM, Alexandre Belloni wrote:
> Add a driver for the Microsemi MII Management controller (MIIM) found on
> Microsemi SoCs.
> On Ocelot, there are two controllers, one is connected to the internal
> PHYs, the other one can communicate with external PHYs.
>
> Reviewed-by: Andrew Lunn <andrew@xxxxxxx>
> Signed-off-by: Alexandre Belloni <alexandre.belloni@xxxxxxxxxxx>
Nothing critical, so:
Reviewed-by: Florian Fainelli <f.fainelli@xxxxxxxxx>
[snip]
> +static int mscc_miim_reset(struct mii_bus *bus)
> +{
> + struct mscc_miim_dev *miim = bus->priv;
> +
> + if (miim->phy_regs) {
> + writel(0, miim->phy_regs + MSCC_PHY_REG_PHY_CFG);
> + writel(0x1ff, miim->phy_regs + MSCC_PHY_REG_PHY_CFG);
> + mdelay(500);
Can this become an msleep() in the future?
> + }
> +
> + return 0;
> +}
> +
> +static int mscc_miim_probe(struct platform_device *pdev)
> +{
> + struct resource *res;
> + struct mii_bus *bus;
> + struct mscc_miim_dev *dev;
> + int ret;
> +
> + res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> + if (!res)
> + return -ENODEV;
> +
> + bus = devm_mdiobus_alloc_size(&pdev->dev, sizeof(*dev));
> + if (!bus)
> + return -ENOMEM;
> +
> + bus->name = "mscc_miim";
> + bus->read = mscc_miim_read;
> + bus->write = mscc_miim_write;
> + bus->reset = mscc_miim_reset;
> + snprintf(bus->id, MII_BUS_ID_SIZE, "%s-mii", dev_name(&pdev->dev));
> + bus->parent = &pdev->dev;
> +
> + dev = bus->priv;
> + dev->regs = devm_ioremap_resource(&pdev->dev, res);
> + if (IS_ERR(dev->regs)) {
> + dev_err(&pdev->dev, "Unable to map MIIM registers\n");
> + return PTR_ERR(dev->regs);
> + }
> +
> + res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
> + if (res) {
> + dev->phy_regs = devm_ioremap_resource(&pdev->dev, res);
> + if (IS_ERR(dev->phy_regs)) {
> + dev_err(&pdev->dev, "Unable to map internal phy registers\n");
> + return PTR_ERR(dev->phy_regs);
> + }
> + }
> +
> + if (pdev->dev.of_node)
> + ret = of_mdiobus_register(bus, pdev->dev.of_node);
> + else
> + ret = mdiobus_register(bus);
There are other drivers doing that, we should probably make that the
standard behavior of of_mdiobus_register(), like before, candidate for
another patch.
--
Florian
