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mfd / platform / iio: cros_ec: Register sensor through sensorhub

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Remove the duplicated code in MFD, since MFD just registers cros-ec-sensorhub
if at least one sensor is present.

Change IIO cros-ec driver to get the pointer to the cros-ec-dev through
cros-ec-sensorhub.

Signed-off-by: Gwendal Grignou <gwendal@chromium.org>
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
This commit is contained in:
Gwendal Grignou 2019-11-19 13:45:45 +01:00 committed by Enric Balletbo i Serra
parent 5306747118
commit d60ac88a62
7 changed files with 23 additions and 218 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/iio/accel/cros_ec_accel_legacy.c
View File

@ -163,16 +163,10 @@ static const struct iio_chan_spec cros_ec_accel_legacy_channels[] = {
static int cros_ec_accel_legacy_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct cros_ec_dev *ec = dev_get_drvdata(dev->parent);
struct iio_dev *indio_dev;
struct cros_ec_sensors_core_state *state;
int ret;
if (!ec || !ec->ec_dev) {
dev_warn(&pdev->dev, "No EC device found.\n");
return -EINVAL;
}
indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*state));
if (!indio_dev)
return -ENOMEM;

6
drivers/iio/common/cros_ec_sensors/cros_ec_sensors.c
View File

@ -222,17 +222,11 @@ 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 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;
}
indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*state));
if (!indio_dev)
return -ENOMEM;

4
drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c
View File

@ -18,6 +18,7 @@
#include <linux/slab.h>
#include <linux/platform_data/cros_ec_commands.h>
#include <linux/platform_data/cros_ec_proto.h>
#include <linux/platform_data/cros_ec_sensorhub.h>
#include <linux/platform_device.h>
static char *cros_ec_loc[] = {
@ -88,7 +89,8 @@ 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_sensorhub *sensor_hub = dev_get_drvdata(dev->parent);
struct cros_ec_dev *ec = sensor_hub->ec;
struct cros_ec_sensor_platform *sensor_platform = dev_get_platdata(dev);
u32 ver_mask;
int ret, i;

6
drivers/iio/light/cros_ec_light_prox.c
View File

@ -169,17 +169,11 @@ 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 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;
}
indio_dev = devm_iio_device_alloc(dev, sizeof(*state));
if (!indio_dev)
return -ENOMEM;

203
drivers/mfd/cros_ec_dev.c
View File

@ -78,6 +78,10 @@ static const struct mfd_cell cros_ec_rtc_cells[] = {
{ .name = "cros-ec-rtc", },
};
static const struct mfd_cell cros_ec_sensorhub_cells[] = {
{ .name = "cros-ec-sensorhub", },
};
static const struct mfd_cell cros_usbpd_charger_cells[] = {
{ .name = "cros-usbpd-charger", },
{ .name = "cros-usbpd-logger", },
@ -117,192 +121,6 @@ static void cros_ec_class_release(struct device *dev)
kfree(to_cros_ec_dev(dev));
}
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_status(ec->ec_dev, msg);
if (ret < 0) {
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 if lid angle sensor and/or FIFO are needed.
*/
sensor_cells = kcalloc(sensor_num + 2, sizeof(struct mfd_cell),
GFP_KERNEL);
if (sensor_cells == NULL)
goto error;
sensor_platforms = kcalloc(sensor_num,
sizeof(struct cros_ec_sensor_platform),
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_status(ec->ec_dev, msg);
if (ret < 0) {
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)
ec->has_kb_wake_angle = true;
if (cros_ec_check_features(ec, EC_FEATURE_MOTION_SENSE_FIFO)) {
sensor_cells[id].name = "cros-ec-ring";
id++;
}
if (cros_ec_check_features(ec,
EC_FEATURE_REFINED_TABLET_MODE_HYSTERESIS)) {
sensor_cells[id].name = "cros-ec-lid-angle";
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 struct cros_ec_sensor_platform sensor_platforms[] = {
{ .sensor_num = 0 },
{ .sensor_num = 1 }
};
static const struct mfd_cell cros_ec_accel_legacy_cells[] = {
{
.name = "cros-ec-accel-legacy",
.platform_data = &sensor_platforms[0],
.pdata_size = sizeof(struct cros_ec_sensor_platform),
},
{
.name = "cros-ec-accel-legacy",
.platform_data = &sensor_platforms[1],
.pdata_size = sizeof(struct cros_ec_sensor_platform),
}
};
static void cros_ec_accel_legacy_register(struct cros_ec_dev *ec)
{
struct cros_ec_device *ec_dev = ec->ec_dev;
u8 status;
int ret;
/*
* ECs that need legacy support are the main EC, directly connected to
* the AP.
*/
if (ec->cmd_offset != 0)
return;
/*
* Check if EC supports direct memory reads and if EC has
* accelerometers.
*/
if (ec_dev->cmd_readmem) {
ret = ec_dev->cmd_readmem(ec_dev, EC_MEMMAP_ACC_STATUS, 1,
&status);
if (ret < 0) {
dev_warn(ec->dev, "EC direct read error.\n");
return;
}
/* Check if EC has accelerometers. */
if (!(status & EC_MEMMAP_ACC_STATUS_PRESENCE_BIT)) {
dev_info(ec->dev, "EC does not have accelerometers.\n");
return;
}
}
/*
* The device may still support accelerometers:
* it would be an older ARM based device that do not suppor the
* EC_CMD_GET_FEATURES command.
*
* Register 2 accelerometers, we will fail in the IIO driver if there
* are no sensors.
*/
ret = mfd_add_hotplug_devices(ec->dev, cros_ec_accel_legacy_cells,
ARRAY_SIZE(cros_ec_accel_legacy_cells));
if (ret)
dev_err(ec_dev->dev, "failed to add EC sensors\n");
}
static int ec_device_probe(struct platform_device *pdev)
{
int retval = -ENOMEM;
@ -358,11 +176,14 @@ static int ec_device_probe(struct platform_device *pdev)
goto failed;
/* check whether this EC is a sensor hub. */
if (cros_ec_check_features(ec, EC_FEATURE_MOTION_SENSE))
cros_ec_sensors_register(ec);
else
/* Workaroud for older EC firmware */
cros_ec_accel_legacy_register(ec);
if (cros_ec_get_sensor_count(ec) > 0) {
retval = mfd_add_hotplug_devices(ec->dev,
cros_ec_sensorhub_cells,
ARRAY_SIZE(cros_ec_sensorhub_cells));
if (retval)
dev_err(ec->dev, "failed to add %s subdevice: %d\n",
cros_ec_sensorhub_cells->name, retval);
}
/*
* The following subdevices can be detected by sending the

8
include/linux/platform_data/cros_ec_proto.h
View File

@ -168,14 +168,6 @@ struct cros_ec_device {
struct platform_device *pd;
};
/**
* struct cros_ec_sensor_platform - ChromeOS EC sensor platform information.
* @sensor_num: Id of the sensor, as reported by the EC.
*/
struct cros_ec_sensor_platform {
u8 sensor_num;
};
/**
* struct cros_ec_platform - ChromeOS EC platform information.
* @ec_name: Name of EC device (e.g. 'cros-ec', 'cros-pd', ...)

8
include/linux/platform_data/cros_ec_sensorhub.h
View File

@ -10,6 +10,14 @@
#include <linux/platform_data/cros_ec_commands.h>
/**
* struct cros_ec_sensor_platform - ChromeOS EC sensor platform information.
* @sensor_num: Id of the sensor, as reported by the EC.
*/
struct cros_ec_sensor_platform {
u8 sensor_num;
};
/**
* struct cros_ec_sensorhub - Sensor Hub device data.
*