[PATCHv3 2/2] phy: exynos5-usbdrd: Calibrate LOS levels for exynos5420/5800
From: s.nawrocki@samsung.com (Sylwester Nawrocki)
Date: 2017-10-05 12:28:24
Also in:
linux-devicetree, linux-samsung-soc
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