On Mon, 03 Apr 2017, Enric Balletbo i Serra wrote: > The cros_ec_dev driver should be used only to expose the Chrome OS Embedded > Controller to user-space and should not be used to add MFD devices by > calling mfd_add_devices. This patch moves this logic to the MFD cros_ec > driver and removes the MFD bits from the character device driver. Also > makes independent the IIO driver from the character device as also has no > sense. > > Signed-off-by: Enric Balletbo i Serra <enric.balletbo@xxxxxxxxxxxxx> > Acked-by: Jonathan Cameron <jic23@xxxxxxxxxx> > --- > > As pointed by Lee Jones in this thread [1] we should not use the MFD API > outside of MFD. For this reason the cros-ec-rtc did not get accepted yet. > The reality is that we are calling mfd_add_devices from cros-ec-dev driver > already, so this patch get rid off the MFD calls inside the chardev driver > and moves to cros-ec MFD. Also I think the chardev device should simply > implement the ioctl calls to access to it from userspace. > > Changes since v1: > - Acked-by: Jonathan Cameron <jic23@xxxxxxxxxx> > > [1] https://www.spinics.net/lists/kernel/msg2465099.html > > .../iio/common/cros_ec_sensors/cros_ec_sensors.c | 8 - > .../common/cros_ec_sensors/cros_ec_sensors_core.c | 8 +- > drivers/iio/light/cros_ec_light_prox.c | 8 - > drivers/iio/pressure/cros_ec_baro.c | 8 - > drivers/mfd/cros_ec.c | 160 ++++++++++++++++++++ > drivers/platform/chrome/cros_ec_dev.c | 161 --------------------- Did you create this patch with "-M"? This also requires a drivers/platform Ack. > include/linux/mfd/cros_ec.h | 6 +- > 7 files changed, 170 insertions(+), 189 deletions(-) > > diff --git a/drivers/iio/common/cros_ec_sensors/cros_ec_sensors.c b/drivers/iio/common/cros_ec_sensors/cros_ec_sensors.c > index 38e8783..9b53a01 100644 > --- a/drivers/iio/common/cros_ec_sensors/cros_ec_sensors.c > +++ b/drivers/iio/common/cros_ec_sensors/cros_ec_sensors.c > @@ -191,19 +191,11 @@ static const struct iio_info ec_sensors_info = { > static int cros_ec_sensors_probe(struct platform_device *pdev) > { > struct device *dev = &pdev->dev; > - struct cros_ec_dev *ec_dev = dev_get_drvdata(dev->parent); > - struct cros_ec_device *ec_device; > struct iio_dev *indio_dev; > struct cros_ec_sensors_state *state; > struct iio_chan_spec *channel; > int ret, i; > > - if (!ec_dev || !ec_dev->ec_dev) { > - dev_warn(&pdev->dev, "No CROS EC device found.\n"); > - return -EINVAL; > - } > - ec_device = ec_dev->ec_dev; > - > indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*state)); > if (!indio_dev) > return -ENOMEM; > diff --git a/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c b/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c > index 416cae5..0cdb64a 100644 > --- a/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c > +++ b/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c > @@ -41,12 +41,13 @@ int cros_ec_sensors_core_init(struct platform_device *pdev, > { > struct device *dev = &pdev->dev; > struct cros_ec_sensors_core_state *state = iio_priv(indio_dev); > - struct cros_ec_dev *ec = dev_get_drvdata(pdev->dev.parent); > + struct cros_ec_device *ec_dev = dev_get_drvdata(pdev->dev.parent); > struct cros_ec_sensor_platform *sensor_platform = dev_get_platdata(dev); > > platform_set_drvdata(pdev, indio_dev); > > - state->ec = ec->ec_dev; > + state->ec = ec_dev; > + > state->msg = devm_kzalloc(&pdev->dev, > max((u16)sizeof(struct ec_params_motion_sense), > state->ec->max_response), GFP_KERNEL); > @@ -59,7 +60,8 @@ int cros_ec_sensors_core_init(struct platform_device *pdev, > > /* Set up the host command structure. */ > state->msg->version = 2; > - state->msg->command = EC_CMD_MOTION_SENSE_CMD + ec->cmd_offset; > + state->msg->command = EC_CMD_MOTION_SENSE_CMD + > + sensor_platform->cmd_offset; > state->msg->outsize = sizeof(struct ec_params_motion_sense); > > indio_dev->dev.parent = &pdev->dev; > diff --git a/drivers/iio/light/cros_ec_light_prox.c b/drivers/iio/light/cros_ec_light_prox.c > index 7217223..2133ddc 100644 > --- a/drivers/iio/light/cros_ec_light_prox.c > +++ b/drivers/iio/light/cros_ec_light_prox.c > @@ -181,19 +181,11 @@ static const struct iio_info cros_ec_light_prox_info = { > static int cros_ec_light_prox_probe(struct platform_device *pdev) > { > struct device *dev = &pdev->dev; > - struct cros_ec_dev *ec_dev = dev_get_drvdata(dev->parent); > - struct cros_ec_device *ec_device; > struct iio_dev *indio_dev; > struct cros_ec_light_prox_state *state; > struct iio_chan_spec *channel; > int ret; > > - if (!ec_dev || !ec_dev->ec_dev) { > - dev_warn(dev, "No CROS EC device found.\n"); > - return -EINVAL; > - } > - ec_device = ec_dev->ec_dev; > - > indio_dev = devm_iio_device_alloc(dev, sizeof(*state)); > if (!indio_dev) > return -ENOMEM; > diff --git a/drivers/iio/pressure/cros_ec_baro.c b/drivers/iio/pressure/cros_ec_baro.c > index 48b2a30..dbea18b 100644 > --- a/drivers/iio/pressure/cros_ec_baro.c > +++ b/drivers/iio/pressure/cros_ec_baro.c > @@ -126,19 +126,11 @@ static const struct iio_info cros_ec_baro_info = { > static int cros_ec_baro_probe(struct platform_device *pdev) > { > struct device *dev = &pdev->dev; > - struct cros_ec_dev *ec_dev = dev_get_drvdata(dev->parent); > - struct cros_ec_device *ec_device; > struct iio_dev *indio_dev; > struct cros_ec_baro_state *state; > struct iio_chan_spec *channel; > int ret; > > - if (!ec_dev || !ec_dev->ec_dev) { > - dev_warn(dev, "No CROS EC device found.\n"); > - return -EINVAL; > - } > - ec_device = ec_dev->ec_dev; > - > indio_dev = devm_iio_device_alloc(dev, sizeof(*state)); > if (!indio_dev) > return -ENOMEM; > diff --git a/drivers/mfd/cros_ec.c b/drivers/mfd/cros_ec.c > index d4a407e..bbc17ab 100644 > --- a/drivers/mfd/cros_ec.c > +++ b/drivers/mfd/cros_ec.c > @@ -84,6 +84,160 @@ static int cros_ec_sleep_event(struct cros_ec_device *ec_dev, u8 sleep_event) > return cros_ec_cmd_xfer(ec_dev, &buf.msg); > } > > +static int cros_ec_check_features(struct cros_ec_device *ec_dev, int feature) > +{ > + struct cros_ec_command *msg; > + int ret; > + > + if (ec_dev->features[0] == -1U && ec_dev->features[1] == -1U) { > + /* features bitmap not read yet */ > + > + msg = kmalloc(sizeof(*msg) + sizeof(ec_dev->features), > + GFP_KERNEL); > + if (!msg) > + return -ENOMEM; > + > + msg->version = 0; > + msg->command = EC_CMD_GET_FEATURES + ec_p.cmd_offset; > + msg->insize = sizeof(ec_dev->features); > + msg->outsize = 0; > + > + ret = cros_ec_cmd_xfer(ec_dev, msg); > + if (ret < 0 || msg->result != EC_RES_SUCCESS) { > + dev_warn(ec_dev->dev, "cannot get EC features: %d/%d\n", > + ret, msg->result); > + memset(ec_dev->features, 0, sizeof(ec_dev->features)); > + } > + > + memcpy(ec_dev->features, msg->data, sizeof(ec_dev->features)); > + > + dev_dbg(ec_dev->dev, "EC features %08x %08x\n", > + ec_dev->features[0], ec_dev->features[1]); > + > + kfree(msg); > + } > + > + return ec_dev->features[feature / 32] & EC_FEATURE_MASK_0(feature); > +} > + > +static void cros_ec_sensors_register(struct cros_ec_device *ec_dev) > +{ > + /* > + * Issue a command to get the number of sensor reported. > + * Build an array of sensors driver and register them all. > + */ > + int ret, i, id, sensor_num; > + struct mfd_cell *sensor_cells; > + struct cros_ec_sensor_platform *sensor_platforms; > + int sensor_type[MOTIONSENSE_TYPE_MAX]; > + struct ec_params_motion_sense *params; > + struct ec_response_motion_sense *resp; > + struct cros_ec_command *msg; > + > + msg = kzalloc(sizeof(struct cros_ec_command) + > + max(sizeof(*params), sizeof(*resp)), GFP_KERNEL); > + if (msg == NULL) > + return; > + > + msg->version = 2; > + msg->command = EC_CMD_MOTION_SENSE_CMD + ec_p.cmd_offset; > + msg->outsize = sizeof(*params); > + msg->insize = sizeof(*resp); > + > + params = (struct ec_params_motion_sense *)msg->data; > + params->cmd = MOTIONSENSE_CMD_DUMP; > + > + ret = cros_ec_cmd_xfer(ec_dev, msg); > + if (ret < 0 || msg->result != EC_RES_SUCCESS) { > + dev_warn(ec_dev->dev, "cannot get EC sensor information: %d/%d\n", > + ret, msg->result); > + goto error; > + } > + > + resp = (struct ec_response_motion_sense *)msg->data; > + sensor_num = resp->dump.sensor_count; > + /* Allocate 2 extra sensors in case lid angle or FIFO are needed */ > + sensor_cells = kzalloc(sizeof(struct mfd_cell) * (sensor_num + 2), > + GFP_KERNEL); > + if (sensor_cells == NULL) > + goto error; > + > + sensor_platforms = kzalloc(sizeof(struct cros_ec_sensor_platform) * > + (sensor_num + 1), GFP_KERNEL); > + if (sensor_platforms == NULL) > + goto error_platforms; > + > + memset(sensor_type, 0, sizeof(sensor_type)); > + id = 0; > + for (i = 0; i < sensor_num; i++) { > + params->cmd = MOTIONSENSE_CMD_INFO; > + params->info.sensor_num = i; > + ret = cros_ec_cmd_xfer(ec_dev, msg); > + if (ret < 0 || msg->result != EC_RES_SUCCESS) { > + dev_warn(ec_dev->dev, "no info for EC sensor %d : %d/%d\n", > + i, ret, msg->result); > + continue; > + } > + switch (resp->info.type) { > + case MOTIONSENSE_TYPE_ACCEL: > + sensor_cells[id].name = "cros-ec-accel"; > + break; > + case MOTIONSENSE_TYPE_BARO: > + sensor_cells[id].name = "cros-ec-baro"; > + break; > + case MOTIONSENSE_TYPE_GYRO: > + sensor_cells[id].name = "cros-ec-gyro"; > + break; > + case MOTIONSENSE_TYPE_MAG: > + sensor_cells[id].name = "cros-ec-mag"; > + break; > + case MOTIONSENSE_TYPE_PROX: > + sensor_cells[id].name = "cros-ec-prox"; > + break; > + case MOTIONSENSE_TYPE_LIGHT: > + sensor_cells[id].name = "cros-ec-light"; > + break; > + case MOTIONSENSE_TYPE_ACTIVITY: > + sensor_cells[id].name = "cros-ec-activity"; > + break; > + default: > + dev_warn(ec_dev->dev, "unknown type %d\n", > + resp->info.type); > + continue; > + } > + sensor_platforms[id].sensor_num = i; > + sensor_platforms[id].cmd_offset = ec_p.cmd_offset; > + sensor_cells[id].id = sensor_type[resp->info.type]; > + sensor_cells[id].platform_data = &sensor_platforms[id]; > + sensor_cells[id].pdata_size = > + sizeof(struct cros_ec_sensor_platform); > + > + sensor_type[resp->info.type]++; > + id++; > + } > + if (sensor_type[MOTIONSENSE_TYPE_ACCEL] >= 2) { > + sensor_platforms[id].sensor_num = sensor_num; > + > + sensor_cells[id].name = "cros-ec-angle"; > + sensor_cells[id].id = 0; > + sensor_cells[id].platform_data = &sensor_platforms[id]; > + sensor_cells[id].pdata_size = > + sizeof(struct cros_ec_sensor_platform); > + id++; > + } > + > + ret = mfd_add_devices(ec_dev->dev, PLATFORM_DEVID_AUTO, sensor_cells, > + id, NULL, 0, NULL); > + if (ret) > + dev_err(ec_dev->dev, "failed to add EC sensors\n"); > + > + kfree(sensor_platforms); > +error_platforms: > + kfree(sensor_cells); > +error: > + kfree(msg); > +} > + > int cros_ec_register(struct cros_ec_device *ec_dev) > { > struct device *dev = ec_dev->dev; > @@ -94,6 +248,8 @@ int cros_ec_register(struct cros_ec_device *ec_dev) > ec_dev->max_request = sizeof(struct ec_params_hello); > ec_dev->max_response = sizeof(struct ec_response_get_protocol_info); > ec_dev->max_passthru = 0; > + ec_dev->features[0] = -1U; /* Not cached yet */ > + ec_dev->features[1] = -1U; /* Not cached yet */ > > ec_dev->din = devm_kzalloc(dev, ec_dev->din_size, GFP_KERNEL); > if (!ec_dev->din) > @@ -127,6 +283,10 @@ int cros_ec_register(struct cros_ec_device *ec_dev) > goto fail_mfd; > } > > + /* Check whether this EC is a sensor hub. */ > + if (cros_ec_check_features(ec_dev, EC_FEATURE_MOTION_SENSE)) > + cros_ec_sensors_register(ec_dev); > + > if (ec_dev->max_passthru) { > /* > * Register a PD device as well on top of this device. > diff --git a/drivers/platform/chrome/cros_ec_dev.c b/drivers/platform/chrome/cros_ec_dev.c > index b9bf086..4947650 100644 > --- a/drivers/platform/chrome/cros_ec_dev.c > +++ b/drivers/platform/chrome/cros_ec_dev.c > @@ -90,41 +90,6 @@ static int ec_get_version(struct cros_ec_dev *ec, char *str, int maxlen) > return ret; > } > > -static int cros_ec_check_features(struct cros_ec_dev *ec, int feature) > -{ > - struct cros_ec_command *msg; > - int ret; > - > - if (ec->features[0] == -1U && ec->features[1] == -1U) { > - /* features bitmap not read yet */ > - > - msg = kmalloc(sizeof(*msg) + sizeof(ec->features), GFP_KERNEL); > - if (!msg) > - return -ENOMEM; > - > - msg->version = 0; > - msg->command = EC_CMD_GET_FEATURES + ec->cmd_offset; > - msg->insize = sizeof(ec->features); > - msg->outsize = 0; > - > - ret = cros_ec_cmd_xfer(ec->ec_dev, msg); > - if (ret < 0 || msg->result != EC_RES_SUCCESS) { > - dev_warn(ec->dev, "cannot get EC features: %d/%d\n", > - ret, msg->result); > - memset(ec->features, 0, sizeof(ec->features)); > - } > - > - memcpy(ec->features, msg->data, sizeof(ec->features)); > - > - dev_dbg(ec->dev, "EC features %08x %08x\n", > - ec->features[0], ec->features[1]); > - > - kfree(msg); > - } > - > - return ec->features[feature / 32] & EC_FEATURE_MASK_0(feature); > -} > - > /* Device file ops */ > static int ec_device_open(struct inode *inode, struct file *filp) > { > @@ -268,126 +233,6 @@ static void __remove(struct device *dev) > kfree(ec); > } > > -static void cros_ec_sensors_register(struct cros_ec_dev *ec) > -{ > - /* > - * Issue a command to get the number of sensor reported. > - * Build an array of sensors driver and register them all. > - */ > - int ret, i, id, sensor_num; > - struct mfd_cell *sensor_cells; > - struct cros_ec_sensor_platform *sensor_platforms; > - int sensor_type[MOTIONSENSE_TYPE_MAX]; > - struct ec_params_motion_sense *params; > - struct ec_response_motion_sense *resp; > - struct cros_ec_command *msg; > - > - msg = kzalloc(sizeof(struct cros_ec_command) + > - max(sizeof(*params), sizeof(*resp)), GFP_KERNEL); > - if (msg == NULL) > - return; > - > - msg->version = 2; > - msg->command = EC_CMD_MOTION_SENSE_CMD + ec->cmd_offset; > - msg->outsize = sizeof(*params); > - msg->insize = sizeof(*resp); > - > - params = (struct ec_params_motion_sense *)msg->data; > - params->cmd = MOTIONSENSE_CMD_DUMP; > - > - ret = cros_ec_cmd_xfer(ec->ec_dev, msg); > - if (ret < 0 || msg->result != EC_RES_SUCCESS) { > - dev_warn(ec->dev, "cannot get EC sensor information: %d/%d\n", > - ret, msg->result); > - goto error; > - } > - > - resp = (struct ec_response_motion_sense *)msg->data; > - sensor_num = resp->dump.sensor_count; > - /* Allocate 2 extra sensors in case lid angle or FIFO are needed */ > - sensor_cells = kzalloc(sizeof(struct mfd_cell) * (sensor_num + 2), > - GFP_KERNEL); > - if (sensor_cells == NULL) > - goto error; > - > - sensor_platforms = kzalloc(sizeof(struct cros_ec_sensor_platform) * > - (sensor_num + 1), GFP_KERNEL); > - if (sensor_platforms == NULL) > - goto error_platforms; > - > - memset(sensor_type, 0, sizeof(sensor_type)); > - id = 0; > - for (i = 0; i < sensor_num; i++) { > - params->cmd = MOTIONSENSE_CMD_INFO; > - params->info.sensor_num = i; > - ret = cros_ec_cmd_xfer(ec->ec_dev, msg); > - if (ret < 0 || msg->result != EC_RES_SUCCESS) { > - dev_warn(ec->dev, "no info for EC sensor %d : %d/%d\n", > - i, ret, msg->result); > - continue; > - } > - switch (resp->info.type) { > - case MOTIONSENSE_TYPE_ACCEL: > - sensor_cells[id].name = "cros-ec-accel"; > - break; > - case MOTIONSENSE_TYPE_BARO: > - sensor_cells[id].name = "cros-ec-baro"; > - break; > - case MOTIONSENSE_TYPE_GYRO: > - sensor_cells[id].name = "cros-ec-gyro"; > - break; > - case MOTIONSENSE_TYPE_MAG: > - sensor_cells[id].name = "cros-ec-mag"; > - break; > - case MOTIONSENSE_TYPE_PROX: > - sensor_cells[id].name = "cros-ec-prox"; > - break; > - case MOTIONSENSE_TYPE_LIGHT: > - sensor_cells[id].name = "cros-ec-light"; > - break; > - case MOTIONSENSE_TYPE_ACTIVITY: > - sensor_cells[id].name = "cros-ec-activity"; > - break; > - default: > - dev_warn(ec->dev, "unknown type %d\n", resp->info.type); > - continue; > - } > - sensor_platforms[id].sensor_num = i; > - sensor_cells[id].id = sensor_type[resp->info.type]; > - sensor_cells[id].platform_data = &sensor_platforms[id]; > - sensor_cells[id].pdata_size = > - sizeof(struct cros_ec_sensor_platform); > - > - sensor_type[resp->info.type]++; > - id++; > - } > - if (sensor_type[MOTIONSENSE_TYPE_ACCEL] >= 2) { > - sensor_platforms[id].sensor_num = sensor_num; > - > - sensor_cells[id].name = "cros-ec-angle"; > - sensor_cells[id].id = 0; > - sensor_cells[id].platform_data = &sensor_platforms[id]; > - sensor_cells[id].pdata_size = > - sizeof(struct cros_ec_sensor_platform); > - id++; > - } > - if (cros_ec_check_features(ec, EC_FEATURE_MOTION_SENSE_FIFO)) { > - sensor_cells[id].name = "cros-ec-ring"; > - id++; > - } > - > - ret = mfd_add_devices(ec->dev, 0, sensor_cells, id, > - NULL, 0, NULL); > - if (ret) > - dev_err(ec->dev, "failed to add EC sensors\n"); > - > - kfree(sensor_platforms); > -error_platforms: > - kfree(sensor_cells); > -error: > - kfree(msg); > -} > - > static int ec_device_probe(struct platform_device *pdev) > { > int retval = -ENOMEM; > @@ -402,8 +247,6 @@ static int ec_device_probe(struct platform_device *pdev) > ec->ec_dev = dev_get_drvdata(dev->parent); > ec->dev = dev; > ec->cmd_offset = ec_platform->cmd_offset; > - ec->features[0] = -1U; /* Not cached yet */ > - ec->features[1] = -1U; /* Not cached yet */ > device_initialize(&ec->class_dev); > cdev_init(&ec->cdev, &fops); > > @@ -432,10 +275,6 @@ static int ec_device_probe(struct platform_device *pdev) > if (cros_ec_debugfs_init(ec)) > dev_warn(dev, "failed to create debugfs directory\n"); > > - /* check whether this EC is a sensor hub. */ > - if (cros_ec_check_features(ec, EC_FEATURE_MOTION_SENSE)) > - cros_ec_sensors_register(ec); > - > /* Take control of the lightbar from the EC. */ > lb_manual_suspend_ctrl(ec, 1); > > diff --git a/include/linux/mfd/cros_ec.h b/include/linux/mfd/cros_ec.h > index 3b16c90..8f87999 100644 > --- a/include/linux/mfd/cros_ec.h > +++ b/include/linux/mfd/cros_ec.h > @@ -115,6 +115,7 @@ struct cros_ec_command { > * @event_notifier: interrupt event notifier for transport devices. > * @event_data: raw payload transferred with the MKBP event. > * @event_size: size in bytes of the event data. > + * @features: stores the EC features. > */ > struct cros_ec_device { > > @@ -149,15 +150,19 @@ struct cros_ec_device { > > struct ec_response_get_next_event event_data; > int event_size; > + u32 features[2]; > }; > > /** > * struct cros_ec_sensor_platform - ChromeOS EC sensor platform information > * > * @sensor_num: Id of the sensor, as reported by the EC. > + * @cmd_offset: offset to apply for each command. Set when > + * registering a devicde behind another one. > */ > struct cros_ec_sensor_platform { > u8 sensor_num; > + u16 cmd_offset; > }; > > /* struct cros_ec_platform - ChromeOS EC platform information > @@ -191,7 +196,6 @@ struct cros_ec_dev { > struct device *dev; > struct cros_ec_debugfs *debug_info; > u16 cmd_offset; > - u32 features[2]; > }; > > /** -- Lee Jones Linaro STMicroelectronics Landing Team Lead Linaro.org │ Open source software for ARM SoCs Follow Linaro: Facebook | Twitter | Blog -- To unsubscribe from this list: send the line "unsubscribe linux-iio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
