Hi Benjamin,
On Mon, Oct 10, 2016 at 9:42 AM, Benjamin Tissoires
<benjamin.tissoires@xxxxxxxxxx> wrote:
> 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 <benjamin.tissoires@xxxxxxxxxx>
>
Why do we have to do this in the driver instead of having I2C core set
it up for us? I expect we'd be repeating this block of code for every
driver that has an option of using SMbus notify.
Thanks!
> ---
>
> 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
>
--
Dmitry
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