diff options
Diffstat (limited to 'drivers/rtc/rtc-isl1208.c')
| -rw-r--r-- | drivers/rtc/rtc-isl1208.c | 21 |
1 files changed, 18 insertions, 3 deletions
diff --git a/drivers/rtc/rtc-isl1208.c b/drivers/rtc/rtc-isl1208.c index f4eb3e11de28..ea18a8f4bce0 100644 --- a/drivers/rtc/rtc-isl1208.c +++ b/drivers/rtc/rtc-isl1208.c @@ -44,6 +44,7 @@ #define ISL1208_REG_INT_IM (1<<7) /* interrupt/alarm mode */ #define ISL1219_REG_EV 0x09 #define ISL1219_REG_EV_EVEN (1<<4) /* event detection enable */ +#define ISL1219_REG_EV_EVIENB (1<<7) /* event in pull-up disable */ #define ISL1208_REG_ATR 0x0a #define ISL1208_REG_DTR 0x0b @@ -777,8 +778,22 @@ isl1208_probe(struct i2c_client *client, const struct i2c_device_id *id) "please set clock.\n"); if (id->driver_data == TYPE_ISL1219) { - rc = i2c_smbus_write_byte_data(client, ISL1219_REG_EV, - ISL1219_REG_EV_EVEN); + struct device_node *np = client->dev.of_node; + u32 evienb; + + rc = i2c_smbus_read_byte_data(client, ISL1219_REG_EV); + if (rc < 0) { + dev_err(&client->dev, "failed to read EV reg\n"); + return rc; + } + rc |= ISL1219_REG_EV_EVEN; + if (!of_property_read_u32(np, "isil,ev-evienb", &evienb)) { + if (evienb) + rc |= ISL1219_REG_EV_EVIENB; + else + rc &= ~ISL1219_REG_EV_EVIENB; + } + rc = i2c_smbus_write_byte_data(client, ISL1219_REG_EV, rc); if (rc < 0) { dev_err(&client->dev, "could not enable tamper detection\n"); return rc; @@ -786,7 +801,7 @@ isl1208_probe(struct i2c_client *client, const struct i2c_device_id *id) rc = rtc_add_group(rtc, &isl1219_rtc_sysfs_files); if (rc) return rc; - evdet_irq = of_irq_get_byname(client->dev.of_node, "evdet"); + evdet_irq = of_irq_get_byname(np, "evdet"); } rc = sysfs_create_group(&client->dev.kobj, &isl1208_rtc_sysfs_files); |