platform/chrome: mfd/cros_ec_dev: Add sysfs entry to set keyboard wake lid angle
This adds a sysfs attribute (/sys/class/chromeos/cros_ec/kb_wake_angle) used to set and get the keyboard wake lid angle. This attribute is present only if 2 accelerometers are controlled by the EC. This patch also moves the cros_ec features check before the device is added so the features map obtained from the EC is ready on time. Signed-off-by: Gwendal Grignou <gwendal@chromium.org> Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Acked-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Benson Leung <bleung@chromium.org>
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@ -305,8 +305,8 @@ static void cros_ec_sensors_register(struct cros_ec_dev *ec)
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resp = (struct ec_response_motion_sense *)msg->data;
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sensor_num = resp->dump.sensor_count;
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/* Allocate 2 extra sensors in case lid angle or FIFO are needed */
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sensor_cells = kzalloc(sizeof(struct mfd_cell) * (sensor_num + 2),
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/* Allocate 1 extra sensors in FIFO are needed */
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sensor_cells = kzalloc(sizeof(struct mfd_cell) * (sensor_num + 1),
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GFP_KERNEL);
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if (sensor_cells == NULL)
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goto error;
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@ -362,16 +362,10 @@ static void cros_ec_sensors_register(struct cros_ec_dev *ec)
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sensor_type[resp->info.type]++;
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id++;
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}
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if (sensor_type[MOTIONSENSE_TYPE_ACCEL] >= 2) {
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sensor_platforms[id].sensor_num = sensor_num;
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sensor_cells[id].name = "cros-ec-angle";
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sensor_cells[id].id = 0;
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sensor_cells[id].platform_data = &sensor_platforms[id];
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sensor_cells[id].pdata_size =
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sizeof(struct cros_ec_sensor_platform);
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id++;
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}
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if (sensor_type[MOTIONSENSE_TYPE_ACCEL] >= 2)
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ec->has_kb_wake_angle = true;
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if (cros_ec_check_features(ec, EC_FEATURE_MOTION_SENSE_FIFO)) {
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sensor_cells[id].name = "cros-ec-ring";
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id++;
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@ -424,6 +418,14 @@ static int ec_device_probe(struct platform_device *pdev)
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goto failed;
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}
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/* check whether this EC is a sensor hub. */
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if (cros_ec_check_features(ec, EC_FEATURE_MOTION_SENSE))
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cros_ec_sensors_register(ec);
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/* Take control of the lightbar from the EC. */
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lb_manual_suspend_ctrl(ec, 1);
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/* We can now add the sysfs class, we know which parameter to show */
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retval = cdev_device_add(&ec->cdev, &ec->class_dev);
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if (retval) {
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dev_err(dev, "cdev_device_add failed => %d\n", retval);
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@ -433,13 +435,6 @@ static int ec_device_probe(struct platform_device *pdev)
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if (cros_ec_debugfs_init(ec))
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dev_warn(dev, "failed to create debugfs directory\n");
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/* check whether this EC is a sensor hub. */
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if (cros_ec_check_features(ec, EC_FEATURE_MOTION_SENSE))
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cros_ec_sensors_register(ec);
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/* Take control of the lightbar from the EC. */
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lb_manual_suspend_ctrl(ec, 1);
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return 0;
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failed:
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@ -258,21 +258,102 @@ exit:
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return ret;
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}
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/* Keyboard wake angle control */
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static ssize_t kb_wake_angle_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct cros_ec_dev *ec = to_cros_ec_dev(dev);
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struct ec_response_motion_sense *resp;
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struct ec_params_motion_sense *param;
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struct cros_ec_command *msg;
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int ret;
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msg = kmalloc(sizeof(*msg) + EC_HOST_PARAM_SIZE, GFP_KERNEL);
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if (!msg)
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return -ENOMEM;
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param = (struct ec_params_motion_sense *)msg->data;
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msg->command = EC_CMD_MOTION_SENSE_CMD + ec->cmd_offset;
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msg->version = 2;
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param->cmd = MOTIONSENSE_CMD_KB_WAKE_ANGLE;
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param->kb_wake_angle.data = EC_MOTION_SENSE_NO_VALUE;
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msg->outsize = sizeof(*param);
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msg->insize = sizeof(*resp);
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ret = cros_ec_cmd_xfer_status(ec->ec_dev, msg);
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if (ret < 0)
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goto exit;
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resp = (struct ec_response_motion_sense *)msg->data;
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ret = scnprintf(buf, PAGE_SIZE, "%d\n", resp->kb_wake_angle.ret);
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exit:
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kfree(msg);
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return ret;
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}
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static ssize_t kb_wake_angle_store(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct cros_ec_dev *ec = to_cros_ec_dev(dev);
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struct ec_params_motion_sense *param;
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struct cros_ec_command *msg;
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u16 angle;
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int ret;
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ret = kstrtou16(buf, 0, &angle);
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if (ret)
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return ret;
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msg = kmalloc(sizeof(*msg) + EC_HOST_PARAM_SIZE, GFP_KERNEL);
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if (!msg)
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return -ENOMEM;
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param = (struct ec_params_motion_sense *)msg->data;
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msg->command = EC_CMD_MOTION_SENSE_CMD + ec->cmd_offset;
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msg->version = 2;
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param->cmd = MOTIONSENSE_CMD_KB_WAKE_ANGLE;
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param->kb_wake_angle.data = angle;
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msg->outsize = sizeof(*param);
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msg->insize = sizeof(struct ec_response_motion_sense);
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ret = cros_ec_cmd_xfer_status(ec->ec_dev, msg);
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kfree(msg);
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if (ret < 0)
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return ret;
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return count;
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}
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/* Module initialization */
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static DEVICE_ATTR_RW(reboot);
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static DEVICE_ATTR_RO(version);
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static DEVICE_ATTR_RO(flashinfo);
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static DEVICE_ATTR_RW(kb_wake_angle);
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static struct attribute *__ec_attrs[] = {
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&dev_attr_kb_wake_angle.attr,
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&dev_attr_reboot.attr,
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&dev_attr_version.attr,
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&dev_attr_flashinfo.attr,
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NULL,
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};
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static umode_t cros_ec_ctrl_visible(struct kobject *kobj,
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struct attribute *a, int n)
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{
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struct device *dev = container_of(kobj, struct device, kobj);
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struct cros_ec_dev *ec = to_cros_ec_dev(dev);
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if (a == &dev_attr_kb_wake_angle.attr && !ec->has_kb_wake_angle)
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return 0;
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return a->mode;
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}
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struct attribute_group cros_ec_attr_group = {
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.attrs = __ec_attrs,
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.is_visible = cros_ec_ctrl_visible,
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};
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EXPORT_SYMBOL(cros_ec_attr_group);
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@ -183,6 +183,7 @@ struct cros_ec_debugfs;
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* @ec_dev: cros_ec_device structure to talk to the physical device
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* @dev: pointer to the platform device
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* @debug_info: cros_ec_debugfs structure for debugging information
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* @has_kb_wake_angle: true if at least 2 accelerometer are connected to the EC.
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* @cmd_offset: offset to apply for each command.
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*/
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struct cros_ec_dev {
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@ -191,6 +192,7 @@ struct cros_ec_dev {
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struct cros_ec_device *ec_dev;
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struct device *dev;
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struct cros_ec_debugfs *debug_info;
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bool has_kb_wake_angle;
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u16 cmd_offset;
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u32 features[2];
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};
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