On Fri, Feb 17, 2017 at 4:48 PM, Ritesh Raj Sarraf <rrs@xxxxxxxxxx> wrote: > Lenovo Yoga (many variants: Yoga, Yoga2 Pro, Yoga2 13, Yoga3 Pro, Yoga 3 > 14 etc) has multiple modles that are a hybrid laptop, working in laptop > mode as well as tablet mode. > > Currently, there is no easy interface to determine the touchpad status, > which in case of the Yoga family of machines, can also be useful to > assume tablet mode status. > Note: The ideapad-laptop driver does not provide a SW_TABLET_MODE either > > For a detailed discussion on why we want either of the interfaces, > please see: > https://bugs.launchpad.net/onboard/+bug/1366421/comments/43 > > This patch adds a sysfs interface for read/write access under: > /sys/bus/platform/devices/VPC2004\:00/touchpad_mode > +static ssize_t touchpad_store(struct device *dev, > + struct device_attribute *attr, > + const char *buf, size_t count) > +{ > + struct ideapad_private *priv = dev_get_drvdata(dev); > + int ret, state; > + > + ret = kstrtoint(buf, 0, &state); > + if (ret) > + return ret; If it's intended to be boolean, better to use kstrtobool() > + > + if (state != 0 && state != 1) > + return -EINVAL; > + > + ret = write_ec_cmd(priv->adev->handle, VPCCMD_W_TOUCHPAD, state); > + if (ret < 0) > + return -EIO; > + return count; > +} > + > +static DEVICE_ATTR_RW(touchpad); > + > static struct attribute *ideapad_attributes[] = { > &dev_attr_camera_power.attr, > &dev_attr_fan_mode.attr, > + &dev_attr_touchpad.attr, > NULL > }; > > -- > 2.11.0 > -- With Best Regards, Andy Shevchenko
