Implement support for using the values given in the
isil,trip-level[87]5-microvolt properties to set appropriate values in
the VB[87]5TP bits in the PWR_VBAT register.
Signed-off-by: Rasmus Villemoes <linux@xxxxxxxxxxxxxxxxxx>
---
drivers/rtc/rtc-isl12022.c | 35 +++++++++++++++++++++++++++++++++++
1 file changed, 35 insertions(+)
diff --git a/drivers/rtc/rtc-isl12022.c b/drivers/rtc/rtc-isl12022.c
index ebd66b835cef..cb8f1d92e116 100644
--- a/drivers/rtc/rtc-isl12022.c
+++ b/drivers/rtc/rtc-isl12022.c
@@ -31,6 +31,8 @@
#define ISL12022_REG_SR 0x07
#define ISL12022_REG_INT 0x08
+#define ISL12022_REG_PWR_VBAT 0x0a
+
#define ISL12022_REG_BETA 0x0d
#define ISL12022_REG_TEMP_L 0x28
@@ -42,6 +44,9 @@
#define ISL12022_INT_WRTC (1 << 6)
+#define ISL12022_REG_VB85_MASK GENMASK(5, 3)
+#define ISL12022_REG_VB75_MASK GENMASK(2, 0)
+
#define ISL12022_BETA_TSE (1 << 7)
static umode_t isl12022_hwmon_is_visible(const void *data,
@@ -209,6 +214,35 @@ static const struct regmap_config regmap_config = {
.use_single_write = true,
};
+static const u32 trip_level85[] = { 2125000, 2295000, 2550000, 2805000, 3060000, 4250000, 4675000 };
+static const u32 trip_level75[] = { 1875000, 2025000, 2250000, 2475000, 2700000, 3750000, 4125000 };
+
+static void isl12022_set_trip_levels(struct device *dev)
+{
+ struct regmap *regmap = dev_get_drvdata(dev);
+ u32 level85 = 0, level75 = 0;
+ int ret, x85, x75;
+ u8 val, mask;
+
+ device_property_read_u32(dev, "isil,trip-level85-microvolt", &level85);
+ device_property_read_u32(dev, "isil,trip-level75-microvolt", &level75);
+
+ for (x85 = 0; x85 < ARRAY_SIZE(trip_level85) - 1; ++x85)
+ if (level85 <= trip_level85[x85])
+ break;
+
+ for (x75 = 0; x75 < ARRAY_SIZE(trip_level75) - 1; ++x75)
+ if (level75 <= trip_level75[x75])
+ break;
+
+ val = FIELD_PREP(ISL12022_REG_VB85_MASK, x85) | FIELD_PREP(ISL12022_REG_VB75_MASK, x75);
+ mask = ISL12022_REG_VB85_MASK | ISL12022_REG_VB75_MASK;
+
+ ret = regmap_update_bits(regmap, ISL12022_REG_PWR_VBAT, mask, val);
+ if (ret)
+ dev_warn(dev, "unable to set battery alarm levels: %d\n", ret);
+}
+
static int isl12022_probe(struct i2c_client *client)
{
struct rtc_device *rtc;
@@ -225,6 +259,7 @@ static int isl12022_probe(struct i2c_client *client)
dev_set_drvdata(&client->dev, regmap);
+ isl12022_set_trip_levels(&client->dev);
isl12022_hwmon_register(&client->dev);
rtc = devm_rtc_allocate_device(&client->dev);
--
2.37.2
