The eth3915n requires more delay time than the eth3500 when poweron
& reset.
Define EKTH3915_POWERON_DELAY_MSEC as the poweron delay time of eth3915n,
about 80ms.
Define EKTH3915_RESET_DELAY_MSEC as the reset delay time of eth3915n,
about 300ms.
Signed-off-by: Yunlong Jia <yunlong.jia@xxxxxxxxxx>
Reviewed-by: Douglas Anderson <dianders@xxxxxxxxxxxx>
---
Changes in v3:
1. Add poweron delay time.
Changes in v2:
1. Adjust the 'Signed-off-by'.
drivers/input/touchscreen/elants_i2c.c | 21 ++++++++++++++++++++-
1 file changed, 20 insertions(+), 1 deletion(-)
diff --git a/drivers/input/touchscreen/elants_i2c.c b/drivers/input/touchscreen/elants_i2c.c
index c9dd703b0c7d8..fb99dd10b0b6d 100644
--- a/drivers/input/touchscreen/elants_i2c.c
+++ b/drivers/input/touchscreen/elants_i2c.c
@@ -116,6 +116,8 @@
#define ELAN_POWERON_DELAY_USEC 500
#define ELAN_RESET_DELAY_MSEC 20
+#define EKTH3915_POWERON_DELAY_MSEC 80
+#define EKTH3915_RESET_DELAY_MSEC 300
/* FW boot code version */
#define BC_VER_H_BYTE_FOR_EKTH3900x1_I2C 0x72
@@ -133,6 +135,7 @@
enum elants_chip_id {
EKTH3500,
EKTF3624,
+ EKTH3915,
};
enum elants_state {
@@ -664,6 +667,7 @@ static int elants_i2c_initialize(struct elants_data *ts)
switch (ts->chip_id) {
case EKTH3500:
+ case EKTH3915:
if (!error)
error = elants_i2c_query_ts_info_ekth(ts);
break;
@@ -1331,6 +1335,9 @@ static int elants_i2c_power_on(struct elants_data *ts)
if (IS_ERR_OR_NULL(ts->reset_gpio))
return 0;
+ if (ts->chip_id == EKTH3915)
+ msleep(EKTH3915_POWERON_DELAY_MSEC);
+
gpiod_set_value_cansleep(ts->reset_gpio, 1);
error = regulator_enable(ts->vcc33);
@@ -1361,7 +1368,17 @@ static int elants_i2c_power_on(struct elants_data *ts)
if (error)
return error;
- msleep(ELAN_RESET_DELAY_MSEC);
+ if (ts->chip_id == EKTH3915)
+ /*
+ * There need delay 300ms for power on sequence.
+ * T1 + T2 + T3 >= 305 ms
+ * T1: 0<time<500us
+ * T2: >5ms
+ * T3: >300ms
+ */
+ msleep(EKTH3915_RESET_DELAY_MSEC);
+ else
+ msleep(ELAN_RESET_DELAY_MSEC);
return 0;
}
@@ -1686,6 +1703,7 @@ static const struct i2c_device_id elants_i2c_id[] = {
{ DEVICE_NAME, EKTH3500 },
{ "ekth3500", EKTH3500 },
{ "ektf3624", EKTF3624 },
+ { "ekth3915", EKTH3915 },
{ }
};
MODULE_DEVICE_TABLE(i2c, elants_i2c_id);
@@ -1702,6 +1720,7 @@ MODULE_DEVICE_TABLE(acpi, elants_acpi_id);
static const struct of_device_id elants_of_match[] = {
{ .compatible = "elan,ekth3500", .data = (void *)EKTH3500 },
{ .compatible = "elan,ektf3624", .data = (void *)EKTF3624 },
+ { .compatible = "elan,ekth3915", .data = (void *)EKTH3915 },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, elants_of_match);
--
2.17.1
