Re: [PATCH v2 06/11] phy: da8xx-usb: new driver for DA8XX SoC USB PHY

Sergei Shtylyov
2016-03-17T12:39:07Z

On 3/17/2016 5:26 AM, David Lechner wrote:

> This is a new phy driver for the SoC USB controllers on the TI DA8XX

DA8xx, please.

> family of microcontrollers. The USB 1.1 PHY is just a simple on/off.
> The USB 2.0 PHY also allows overriding the VBUS and ID pins.
>
> Signed-off-by: David Lechner <david@lechnology.com>
[...]

> diff --git a/drivers/phy/phy-da8xx-usb.c b/drivers/phy/phy-da8xx-usb.c
> new file mode 100644
> index 0000000..93a5f4d
> --- /dev/null
> +++ b/drivers/phy/phy-da8xx-usb.c
> @@ -0,0 +1,295 @@
[...]
> +static inline u32 da8xx_usbphy_readl(void __iomem *base)
> +{
> + return readl(base);
> +}
> +
> +static inline void da8xx_usbphy_writel(void __iomem *base, u32 value)
> +{
> + writel(value, base);

Why wrap them at all?

> +}
> +
> +static int da8xx_usb11_phy_init(struct phy *phy)
> +{
> + struct da8xx_usbphy *d_phy = phy_get_drvdata(phy);
> + int ret;
> + u32 val;
> +
> + ret = clk_prepare_enable(d_phy->usb11_clk);
> + if (ret)
> + return ret;
> +
> + val = da8xx_usbphy_readl(d_phy->phy_ctrl);
> + val |= USB1SUSPENDM;
> + da8xx_usbphy_writel(d_phy->phy_ctrl, val);

Hum, I'd think this needs to be done in the power_on() method...

> +
> + return 0;
> +}
> +
> +static int da8xx_usb11_phy_shutdown(struct phy *phy)
> +{
> + struct da8xx_usbphy *d_phy = phy_get_drvdata(phy);
> + u32 val;
> +
> + val = da8xx_usbphy_readl(d_phy->phy_ctrl);
> + val &= ~USB1SUSPENDM;
> + da8xx_usbphy_writel(d_phy->phy_ctrl, val);

And this in power_off()...

> +
> + clk_disable_unprepare(d_phy->usb11_clk);
> +
> + return 0;
> +}
> +
> +static const struct phy_ops da8xx_usb11_phy_ops = {
> + .power_on = da8xx_usb11_phy_init,
> + .power_off = da8xx_usb11_phy_shutdown,

Aha, it's just that the names don't match...
Please call the implementations da8xx_usb11_phy_power_{on|off}().
The same with USB 2.0 PHY.

[...]

Looks good otherwise on my superficial review. :-)

MBR, Sergei