The ili9882t is a TDDI IC ((Touch with Display Driver)). It requires the
panel reset gpio to be high before i2c commands. Use a longer delay in
post_power_delay_ms to ensure the poweron sequence.
Signed-off-by: Cong Yang <yangcong5@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>
---
drivers/hid/i2c-hid/i2c-hid-of-elan.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/hid/i2c-hid/i2c-hid-of-elan.c b/drivers/hid/i2c-hid/i2c-hid-of-elan.c
index 76ddc8be1cbb..dd2435270e73 100644
--- a/drivers/hid/i2c-hid/i2c-hid-of-elan.c
+++ b/drivers/hid/i2c-hid/i2c-hid-of-elan.c
@@ -105,8 +105,15 @@ static const struct elan_i2c_hid_chip_data elan_ekth6915_chip_data = {
.hid_descriptor_address = 0x0001,
};
+static const struct elan_i2c_hid_chip_data ilitek_ili9882t_chip_data = {
+ .post_power_delay_ms = 200,
+ .post_gpio_reset_delay_ms = 180,
+ .hid_descriptor_address = 0x0001,
+};
+
static const struct of_device_id elan_i2c_hid_of_match[] = {
{ .compatible = "elan,ekth6915", .data = &elan_ekth6915_chip_data },
+ { .compatible = "ilitek,ili9882t", .data = &ilitek_ili9882t_chip_data },
{ }
};
MODULE_DEVICE_TABLE(of, elan_i2c_hid_of_match);
--
2.25.1
