rtc: isl1208: set ev-evienb bit from device tree

Add support to disable event in pull-up.

Signed-off-by: Denis Osterland <Denis.Osterland@diehl.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

diff --git a/drivers/rtc/rtc-isl1208.c b/drivers/rtc/rtc-isl1208.c
index f4eb3e11de28b77464328d2b524927abd965ce71..ea18a8f4bce063a91587d4424c8d615788af5dfd 100644 (file)
--- 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);