diff options
| author | Denis Osterland <Denis.Osterland@diehl.com> | 2018-07-24 13:31:21 +0200 |
|---|---|---|
| committer | Alexandre Belloni <alexandre.belloni@bootlin.com> | 2018-08-14 23:22:27 +0200 |
| commit | cfa30622c854747aba9c920c7dd30e5a123a414f (patch) | |
| tree | e35910bd34a1b2bef86cf12bff773eb3aafb3190 /drivers/rtc/rtc-isl1208.c | |
| parent | rtc: isl1208: Add "evdet" interrupt source for isl1219 (diff) | |
| download | linux-cfa30622c854747aba9c920c7dd30e5a123a414f.tar.xz linux-cfa30622c854747aba9c920c7dd30e5a123a414f.zip | |
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/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); |