On 4/14/2020 11:10 AM, Robert Marko wrote:
> This patch adds the driver for the MDIO interface
> inside of Qualcomm IPQ40xx series SoC-s.
>
> Signed-off-by: Christian Lamparter <chunkeey@xxxxxxxxx>
> Signed-off-by: Robert Marko <robert.marko@xxxxxxxxxx>
> Cc: Luka Perkov <luka.perkov@xxxxxxxxxx>
> ---
> Changes from v1 to v2:
> * Remove magic default value
> * Remove lockdep_assert_held
> * Add C45 check
> * Simplify the driver
> * Drop device and mii_bus structs from private struct
> * Use devm_mdiobus_alloc_size()
>
> drivers/net/phy/Kconfig | 7 ++
> drivers/net/phy/Makefile | 1 +
> drivers/net/phy/mdio-ipq40xx.c | 176 +++++++++++++++++++++++++++++++++
> 3 files changed, 184 insertions(+)
> create mode 100644 drivers/net/phy/mdio-ipq40xx.c
>
> diff --git a/drivers/net/phy/Kconfig b/drivers/net/phy/Kconfig
> index 3fa33d27eeba..815d52fa6080 100644
> --- a/drivers/net/phy/Kconfig
> +++ b/drivers/net/phy/Kconfig
> @@ -157,6 +157,13 @@ config MDIO_I2C
>
> This is library mode.
>
> +config MDIO_IPQ40XX
> + tristate "Qualcomm IPQ40xx MDIO interface"
> + depends on HAS_IOMEM && OF
You can drop the OF dependency here, of_mdiobus_register() becomes
mdiobus_register() with CONFIG_OF=n.
[snip]
> +static int ipq40xx_mdio_wait_busy(struct mii_bus *bus)
> +{
> + struct ipq40xx_mdio_data *priv = bus->priv;
> + int i;
> +
> + for (i = 0; i < IPQ40XX_MDIO_RETRY; i++) {
> + unsigned int busy;
> +
> + busy = readl(priv->membase + MDIO_CTRL_4_REG) &
> + MDIO_CTRL_4_ACCESS_BUSY;
> + if (!busy)
> + return 0;
> +
> + /* BUSY might take to be cleard by 15~20 times of loop */
typo: cleard instead of cleared.
> + udelay(IPQ40XX_MDIO_DELAY);
> + }
consider using readl_poll_timeout() for this loop.
With that fixed:
Reviewed-by: Florian Fainelli <f.fainelli@xxxxxxxxx>
--
Florian
