[PATCHv3 2/2] phy: exynos5-usbdrd: Calibrate LOS levels for exynos5420/5800

[Sylwester Nawrocki]

On 10/05/2017 02:11 PM, Andrzej Pietrasiewicz wrote:
> +static int crport_handshake(struct exynos5_usbdrd_phy *phy_drd,
> +						u32 val, u32 cmd)
> +{
> +	u32 usec = 100;
> +	unsigned int result;
> +
> +	writel(val | cmd, phy_drd->reg_phy + EXYNOS5_DRD_PHYREG0);
> +
> +	do {
> +		result = readl(phy_drd->reg_phy + EXYNOS5_DRD_PHYREG1);
> +		if (result & PHYREG1_CR_ACK)
> +			break;
> +
> +		udelay(1);
> +	} while (usec-- > 0);

It looks like you could use readl_poll_timeout_atomic() macro 
instead of these polling loops.

-- 
Regards,
Sylwester