| Message ID | 20241209204051.8786-2-hdegoede@redhat.com |
|---|---|
| State | New |
| Headers | show |
| Series | power: supply: Add new "charge_types" property | expand |
On 2024-12-09 21:40:48+0100, Hans de Goede wrote: > Some enum style power-supply properties have text-values / labels for some > of the enum values containing a space, e.g. "Long Life" for > POWER_SUPPLY_CHARGE_TYPE_LONGLIFE. > > Make power_supply_show_enum_with_available() replace these spaces with > '_' when showing the available text-values. After this the output for > a battery which supports "Long Life" will be e.g.: > > Fast [Standard] Long_Life > > or: > > Fast Standard [Long_Life] > > Modify power_supply_store_property() to accept both the original text-value > with space and the alternative value with the spaces replaced by '_'. > This allows users to write the value with '_' after seeing this on reading > the property. > > Signed-off-by: Hans de Goede <hdegoede@redhat.com> Reviewed-by: Thomas Weißschuh <linux@weissschuh.net> > --- > Changes in v2 > - Replace spaces with '_' instead of surrounding the text-value by "" > --- > drivers/power/supply/power_supply_sysfs.c | 37 ++++++++++++++++++++--- > 1 file changed, 33 insertions(+), 4 deletions(-) > > diff --git a/drivers/power/supply/power_supply_sysfs.c b/drivers/power/supply/power_supply_sysfs.c > index 571de43fcca9..034e1848f1ca 100644 > --- a/drivers/power/supply/power_supply_sysfs.c > +++ b/drivers/power/supply/power_supply_sysfs.c > @@ -237,23 +237,52 @@ static enum power_supply_property dev_attr_psp(struct device_attribute *attr) > return to_ps_attr(attr) - power_supply_attrs; > } > > +static void power_supply_escape_spaces(const char *str, char *buf, size_t bufsize) > +{ > + strscpy(buf, str, bufsize); > + strreplace(buf, ' ', '_'); > +} > + > +static int power_supply_match_string(const char * const *array, size_t n, const char *s) > +{ > + int ret; > + > + /* First try an exact match */ > + ret = __sysfs_match_string(array, n, s); > + if (ret >= 0) > + return ret; > + > + /* Second round, try matching with spaces replaced by '_' */ > + for (size_t i = 0; i < n; i++) { > + char buf[32]; > + > + power_supply_escape_spaces(array[i], buf, sizeof(buf)); > + if (sysfs_streq(buf, s)) > + return i; > + } > + > + return -EINVAL; > +} > + > static ssize_t power_supply_show_enum_with_available( > struct device *dev, const char * const labels[], int label_count, > unsigned int available_values, int value, char *buf) > { > bool match = false, available, active; > + char escaped_label[32]; > ssize_t count = 0; > int i; > > for (i = 0; i < label_count; i++) { > available = available_values & BIT(i); > active = i == value; > + power_supply_escape_spaces(labels[i], escaped_label, sizeof(escaped_label)); > > if (available && active) { > - count += sysfs_emit_at(buf, count, "[%s] ", labels[i]); > + count += sysfs_emit_at(buf, count, "[%s] ", escaped_label); > match = true; > } else if (available) { > - count += sysfs_emit_at(buf, count, "%s ", labels[i]); > + count += sysfs_emit_at(buf, count, "%s ", escaped_label); > } > } > > @@ -332,8 +361,8 @@ static ssize_t power_supply_store_property(struct device *dev, > > ret = -EINVAL; > if (ps_attr->text_values_len > 0) { > - ret = __sysfs_match_string(ps_attr->text_values, > - ps_attr->text_values_len, buf); > + ret = power_supply_match_string(ps_attr->text_values, > + ps_attr->text_values_len, buf); > } > > /* > -- > 2.47.1 >
diff --git a/drivers/power/supply/power_supply_sysfs.c b/drivers/power/supply/power_supply_sysfs.c index 571de43fcca9..034e1848f1ca 100644 --- a/drivers/power/supply/power_supply_sysfs.c +++ b/drivers/power/supply/power_supply_sysfs.c @@ -237,23 +237,52 @@ static enum power_supply_property dev_attr_psp(struct device_attribute *attr) return to_ps_attr(attr) - power_supply_attrs; } +static void power_supply_escape_spaces(const char *str, char *buf, size_t bufsize) +{ + strscpy(buf, str, bufsize); + strreplace(buf, ' ', '_'); +} + +static int power_supply_match_string(const char * const *array, size_t n, const char *s) +{ + int ret; + + /* First try an exact match */ + ret = __sysfs_match_string(array, n, s); + if (ret >= 0) + return ret; + + /* Second round, try matching with spaces replaced by '_' */ + for (size_t i = 0; i < n; i++) { + char buf[32]; + + power_supply_escape_spaces(array[i], buf, sizeof(buf)); + if (sysfs_streq(buf, s)) + return i; + } + + return -EINVAL; +} + static ssize_t power_supply_show_enum_with_available( struct device *dev, const char * const labels[], int label_count, unsigned int available_values, int value, char *buf) { bool match = false, available, active; + char escaped_label[32]; ssize_t count = 0; int i; for (i = 0; i < label_count; i++) { available = available_values & BIT(i); active = i == value; + power_supply_escape_spaces(labels[i], escaped_label, sizeof(escaped_label)); if (available && active) { - count += sysfs_emit_at(buf, count, "[%s] ", labels[i]); + count += sysfs_emit_at(buf, count, "[%s] ", escaped_label); match = true; } else if (available) { - count += sysfs_emit_at(buf, count, "%s ", labels[i]); + count += sysfs_emit_at(buf, count, "%s ", escaped_label); } } @@ -332,8 +361,8 @@ static ssize_t power_supply_store_property(struct device *dev, ret = -EINVAL; if (ps_attr->text_values_len > 0) { - ret = __sysfs_match_string(ps_attr->text_values, - ps_attr->text_values_len, buf); + ret = power_supply_match_string(ps_attr->text_values, + ps_attr->text_values_len, buf); } /*
Some enum style power-supply properties have text-values / labels for some of the enum values containing a space, e.g. "Long Life" for POWER_SUPPLY_CHARGE_TYPE_LONGLIFE. Make power_supply_show_enum_with_available() replace these spaces with '_' when showing the available text-values. After this the output for a battery which supports "Long Life" will be e.g.: Fast [Standard] Long_Life or: Fast Standard [Long_Life] Modify power_supply_store_property() to accept both the original text-value with space and the alternative value with the spaces replaced by '_'. This allows users to write the value with '_' after seeing this on reading the property. Signed-off-by: Hans de Goede <hdegoede@redhat.com> --- Changes in v2 - Replace spaces with '_' instead of surrounding the text-value by "" --- drivers/power/supply/power_supply_sysfs.c | 37 ++++++++++++++++++++--- 1 file changed, 33 insertions(+), 4 deletions(-)