This can be used for device register access from board code.
This allows access to capabilities in the RTC chip not abstracted in
U-Boot's RTC class. E.g., device NVRAM or a tamper detection circuit.
Cc: Klaus Goger <klaus.go...@theobroma-systems.com>
Cc: Philipp Tomsich <philipp.toms...@theobroma-systems.com>
Cc: Simon Glass <s...@chromium.org>
Signed-off-by: Trent Piepho <tpie...@impinj.com>
---
drivers/rtc/isl1208.c | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/drivers/rtc/isl1208.c b/drivers/rtc/isl1208.c
index 22ac0d2b08..59a60b75b3 100644
--- a/drivers/rtc/isl1208.c
+++ b/drivers/rtc/isl1208.c
@@ -51,6 +51,24 @@
#define RTC_STAT_BIT_BAT 0x02 /* BATTERY BIT */
#define RTC_STAT_BIT_RTCF 0x01 /* REAL TIME CLOCK FAIL BIT */
+/*
+ * Read an RTC register
+ */
+
+static int isl1208_rtc_read8(struct udevice *dev, unsigned int reg)
+{
+ return dm_i2c_reg_read(dev, reg);
+}
+
+/*
+ * Write an RTC register
+ */
+
+static int isl1208_rtc_write8(struct udevice *dev, unsigned int reg, int val)
+{
+ return dm_i2c_reg_write(dev, reg, val);
+}
+
/*
* Get the current time from the RTC
*/
@@ -161,6 +179,8 @@ static const struct rtc_ops isl1208_rtc_ops = {
.get = isl1208_rtc_get,
.set = isl1208_rtc_set,
.reset = isl1208_rtc_reset,
+ .read8 = isl1208_rtc_read8,
+ .write8 = isl1208_rtc_write8,
};
static const struct udevice_id isl1208_rtc_ids[] = {
--
2.14.3
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