[rtc-linux] Re: [PATCH v3 1/4] rtc: support for amlogic meson rtc

Hi,

Very few comments below

On 05/07/2016 at 20:48:41 +0100, Ben Dooks wrote :

+/* registers accessed from cpu bus */
+#define RTC_REG(x)		((x) * 4)	/* rtc registers 0-4 */
+
+#define LINE_SDI		(1 << 2)
+#define LINE_SEN		(1 << 1)
+#define LINE_SCLK		(1 << 0)
+

Maybe use BIT() here.

+/* RTC interface layer functions */
+
+static int meson_rtc_gettime(struct device *dev, struct rtc_time *tm)
+{
+	struct meson_rtc *rtc = dev_get_drvdata(dev);
+	int ret;
+	u32 time;
+
+	mutex_lock(&rtc->lock);
+
+	ret = meson_rtc_read(rtc, RTC_COUNTER, &time);
+	if (!ret) {
+		rtc_time_to_tm(time, tm);

Can you use the 64bit version?

+		dev_dbg(dev, "read time %lu\n", (unsigned long)time);
+	}
+
+	mutex_unlock(&rtc->lock);
+	return ret;
+}
+
+static int meson_rtc_settime(struct device *dev, struct rtc_time *tm)
+{
+	struct meson_rtc *rtc = dev_get_drvdata(dev);
+	unsigned long time;
+	int ret;
+
+	mutex_lock(&rtc->lock);
+
+	rtc_tm_to_time(tm, &time);

Ditto.


-- 
Alexandre Belloni, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com

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