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authorDenis Osterland <Denis.Osterland@diehl.com>2018-07-24 14:31:21 +0300
committerAlexandre Belloni <alexandre.belloni@bootlin.com>2018-08-15 00:22:27 +0300
commitcfa30622c854747aba9c920c7dd30e5a123a414f (patch)
treee35910bd34a1b2bef86cf12bff773eb3aafb3190 /drivers/rtc
parent9ece7cd833a3e5e0740e2b681abe6ce5e6af6885 (diff)
downloadlinux-cfa30622c854747aba9c920c7dd30e5a123a414f.tar.xz
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>
Diffstat (limited to 'drivers/rtc')
-rw-r--r--drivers/rtc/rtc-isl1208.c21
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);