diff options
Diffstat (limited to 'drivers/platform/chrome/cros_ec_proto.c')
| -rw-r--r-- | drivers/platform/chrome/cros_ec_proto.c | 42 |
1 files changed, 33 insertions, 9 deletions
diff --git a/drivers/platform/chrome/cros_ec_proto.c b/drivers/platform/chrome/cros_ec_proto.c index 3e745e0fe092..8d52b3b4bd4e 100644 --- a/drivers/platform/chrome/cros_ec_proto.c +++ b/drivers/platform/chrome/cros_ec_proto.c @@ -208,6 +208,12 @@ static int cros_ec_get_host_event_wake_mask(struct cros_ec_device *ec_dev, msg->insize = sizeof(*r); ret = send_command(ec_dev, msg); + if (ret >= 0) { + if (msg->result == EC_RES_INVALID_COMMAND) + return -EOPNOTSUPP; + if (msg->result != EC_RES_SUCCESS) + return -EPROTO; + } if (ret > 0) { r = (struct ec_response_host_event_mask *)msg->data; *mask = r->mask; @@ -469,14 +475,33 @@ int cros_ec_query_all(struct cros_ec_device *ec_dev) &ver_mask); ec_dev->host_sleep_v1 = (ret >= 0 && (ver_mask & EC_VER_MASK(1))); - /* - * Get host event wake mask, assume all events are wake events - * if unavailable. - */ + /* Get host event wake mask. */ ret = cros_ec_get_host_event_wake_mask(ec_dev, proto_msg, &ec_dev->host_event_wake_mask); - if (ret < 0) - ec_dev->host_event_wake_mask = U32_MAX; + if (ret < 0) { + /* + * If the EC doesn't support EC_CMD_HOST_EVENT_GET_WAKE_MASK, + * use a reasonable default. Note that we ignore various + * battery, AC status, and power-state events, because (a) + * those can be quite common (e.g., when sitting at full + * charge, on AC) and (b) these are not actionable wake events; + * if anything, we'd like to continue suspending (to save + * power), not wake up. + */ + ec_dev->host_event_wake_mask = U32_MAX & + ~(BIT(EC_HOST_EVENT_AC_DISCONNECTED) | + BIT(EC_HOST_EVENT_BATTERY_LOW) | + BIT(EC_HOST_EVENT_BATTERY_CRITICAL) | + BIT(EC_HOST_EVENT_PD_MCU) | + BIT(EC_HOST_EVENT_BATTERY_STATUS)); + /* + * Old ECs may not support this command. Complain about all + * other errors. + */ + if (ret != -EOPNOTSUPP) + dev_err(ec_dev->dev, + "failed to retrieve wake mask: %d\n", ret); + } ret = 0; @@ -496,8 +521,8 @@ EXPORT_SYMBOL(cros_ec_query_all); * * Return: 0 on success or negative error code. */ -int cros_ec_cmd_xfer(struct cros_ec_device *ec_dev, - struct cros_ec_command *msg) +static int cros_ec_cmd_xfer(struct cros_ec_device *ec_dev, + struct cros_ec_command *msg) { int ret; @@ -541,7 +566,6 @@ int cros_ec_cmd_xfer(struct cros_ec_device *ec_dev, return ret; } -EXPORT_SYMBOL(cros_ec_cmd_xfer); /** * cros_ec_cmd_xfer_status() - Send a command to the ChromeOS EC. |