diff options
Diffstat (limited to 'drivers/platform')
| -rw-r--r-- | drivers/platform/chrome/cros_ec_lightbar.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/drivers/platform/chrome/cros_ec_lightbar.c b/drivers/platform/chrome/cros_ec_lightbar.c index 4df379dc4bb9..e570c1ef7728 100644 --- a/drivers/platform/chrome/cros_ec_lightbar.c +++ b/drivers/platform/chrome/cros_ec_lightbar.c @@ -38,6 +38,12 @@ /* Rate-limit the lightbar interface to prevent DoS. */ static unsigned long lb_interval_jiffies = 50 * HZ / 1000; +/* + * Whether or not we have given userspace control of the lightbar. + * If this is true, we won't do anything during suspend/resume. + */ +static bool userspace_control; + static ssize_t interval_msec_show(struct device *dev, struct device_attribute *attr, char *buf) { @@ -407,11 +413,17 @@ error: int lb_suspend(struct cros_ec_dev *ec) { + if (userspace_control) + return 0; + return lb_send_empty_cmd(ec, LIGHTBAR_CMD_SUSPEND); } int lb_resume(struct cros_ec_dev *ec) { + if (userspace_control) + return 0; + return lb_send_empty_cmd(ec, LIGHTBAR_CMD_RESUME); } @@ -528,6 +540,30 @@ exit: return ret; } +static ssize_t userspace_control_show(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + return scnprintf(buf, PAGE_SIZE, "%d\n", userspace_control); +} + +static ssize_t userspace_control_store(struct device *dev, + struct device_attribute *attr, + const char *buf, + size_t count) +{ + bool enable; + int ret; + + ret = strtobool(buf, &enable); + if (ret < 0) + return ret; + + userspace_control = enable; + + return count; +} + /* Module initialization */ static DEVICE_ATTR_RW(interval_msec); @@ -536,6 +572,7 @@ static DEVICE_ATTR_WO(brightness); static DEVICE_ATTR_WO(led_rgb); static DEVICE_ATTR_RW(sequence); static DEVICE_ATTR_WO(program); +static DEVICE_ATTR_RW(userspace_control); static struct attribute *__lb_cmds_attrs[] = { &dev_attr_interval_msec.attr, @@ -544,6 +581,7 @@ static struct attribute *__lb_cmds_attrs[] = { &dev_attr_led_rgb.attr, &dev_attr_sequence.attr, &dev_attr_program.attr, + &dev_attr_userspace_control.attr, NULL, }; |