[PATCH v4 8/8] Input: elan_i2c - add Host Notify support
From: Benjamin Tissoires <hidden>
Date: 2016-10-10 16:43:18
Also in:
linux-i2c, lkml
Subsystem:
input (keyboard, mouse, joystick, touchscreen) drivers, the rest · Maintainers:
Dmitry Torokhov, Linus Torvalds
The Thinkpad series 13 uses Host Notify to report the interrupt. Add elan_smb_alert() to handle those interrupts and disable the irq handling on this case. Signed-off-by: Benjamin Tissoires <redacted> --- new in v4 (was submitted on linux-input with the .alert callback) --- drivers/input/mouse/elan_i2c_core.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+)
diff --git a/drivers/input/mouse/elan_i2c_core.c b/drivers/input/mouse/elan_i2c_core.c
index 6f16eb4..4aaac5d 100644
--- a/drivers/input/mouse/elan_i2c_core.c
+++ b/drivers/input/mouse/elan_i2c_core.c@@ -1040,6 +1040,21 @@ static int elan_probe(struct i2c_client *client, I2C_FUNC_SMBUS_BLOCK_DATA | I2C_FUNC_SMBUS_I2C_BLOCK)) { transport_ops = &elan_smbus_ops; + + if (!irq) { + if (!i2c_check_functionality(client->adapter, + I2C_FUNC_SMBUS_HOST_NOTIFY)) { + dev_err(dev, "no Host Notify support\n"); + return -ENODEV; + } + + irq = i2c_smbus_host_notify_to_irq(client); + if (irq < 0) { + dev_err(dev, + "Unable to request a Host Notify IRQ.\n"); + return irq; + } + } } else { dev_err(dev, "not a supported I2C/SMBus adapter\n"); return -EIO;
--
2.7.4