Re: [PATCH v2] ptp: add ToD device driver for Intel FPGA cards

On Wed, 22 Mar 2023 10:35:47 -0400 Tianfei Zhang wrote:

+ * A fine ToD HW clock offset adjustment. To perform the fine offset adjustment, the
+ * adjust_period and adjust_count argument are used to update the TOD_ADJUST_PERIOD
+ * and TOD_ADJUST_COUNT register for in hardware. The dt->tod_lock spinlock must be
+ * held when calling this function.
+ */
+static int fine_adjust_tod_clock(struct dfl_tod *dt, u32 adjust_period,
+				 u32 adjust_count)
+{
+	void __iomem *base = dt->tod_ctrl;
+	u32 val;
+
+	writel(adjust_period, base + TOD_ADJUST_PERIOD);
+	writel(adjust_count, base + TOD_ADJUST_COUNT);
+
+	/* Wait for present offset adjustment update to complete */
+	return readl_poll_timeout_atomic(base + TOD_ADJUST_COUNT, val, !val, TOD_ADJUST_INTERVAL_US,
+				  TOD_ADJUST_MAX_US);
+}
+
+/*
+ * A coarse ToD HW clock offset adjustment.
+ * The coarse time adjustment performs by adding or subtracting the delta value

You should wrap the code at 80 characters in places 
where it's easily done.