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| author | Heikki Krogerus <heikki.krogerus@linux.intel.com> | 2023-10-02 17:22:40 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-10-02 16:38:29 +0200 |
| commit | 568441b7d45fc7198a89b522d721428f2005c356 (patch) | |
| tree | 195d224133c84540b92b62502d574d326bedc408 /drivers | |
| parent | b447e9efe50a1d64070c4f3ec1b1ee1882ee9c7a (diff) | |
| download | linux-568441b7d45fc7198a89b522d721428f2005c356.tar.gz linux-568441b7d45fc7198a89b522d721428f2005c356.tar.bz2 linux-568441b7d45fc7198a89b522d721428f2005c356.zip | |
usb: pd: Exposing the Peak Current value of Fixed Supplies to user space
Exposing the value of the field as is.
The Peak Current value has to be interpreted as described
in Table 6-10 (Fixed Power Source Peak Current Capability)
of the USB Power Delivery Specification, but that
interpretation will be done in user space, not in kernel.
Suggested-by: Douglas Gilbert <dgilbert@interlog.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://lore.kernel.org/r/20231002142240.2641962-1-heikki.krogerus@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/usb/typec/pd.c | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/drivers/usb/typec/pd.c b/drivers/usb/typec/pd.c index 8cc66e4467c4..85d015cdbe1f 100644 --- a/drivers/usb/typec/pd.c +++ b/drivers/usb/typec/pd.c @@ -83,14 +83,12 @@ unchunked_extended_messages_supported_show(struct device *dev, } static DEVICE_ATTR_RO(unchunked_extended_messages_supported); -/* - * REVISIT: Peak Current requires access also to the RDO. static ssize_t peak_current_show(struct device *dev, struct device_attribute *attr, char *buf) { - ... + return sysfs_emit(buf, "%u\n", (to_pdo(dev)->pdo >> PDO_FIXED_PEAK_CURR_SHIFT) & 3); } -*/ +static DEVICE_ATTR_RO(peak_current); static ssize_t fast_role_swap_current_show(struct device *dev, struct device_attribute *attr, char *buf) @@ -135,7 +133,7 @@ static struct attribute *source_fixed_supply_attrs[] = { &dev_attr_usb_communication_capable.attr, &dev_attr_dual_role_data.attr, &dev_attr_unchunked_extended_messages_supported.attr, - /*&dev_attr_peak_current.attr,*/ + &dev_attr_peak_current.attr, &dev_attr_voltage.attr, &maximum_current_attr.attr, NULL @@ -144,7 +142,7 @@ static struct attribute *source_fixed_supply_attrs[] = { static umode_t fixed_attr_is_visible(struct kobject *kobj, struct attribute *attr, int n) { if (to_pdo(kobj_to_dev(kobj))->object_position && - /*attr != &dev_attr_peak_current.attr &&*/ + attr != &dev_attr_peak_current.attr && attr != &dev_attr_voltage.attr && attr != &maximum_current_attr.attr && attr != &operational_current_attr.attr) |