| Message ID | 20130319192212.GA5610@kahuna (mailing list archive) |
|---|---|
| State | Not Applicable, archived |
| Headers | show |
Hello Nishanth, On 19-03-2013 15:22, Nishanth Menon wrote: > On 10:54-20130319, Eduardo Valentin wrote: <cut> >> * @adc_start_val: ADC conversion table starting value > You may still want to fix warnings generated by: > ./scripts/kernel-doc -v drivers/staging/ti-soc-thermal/ti-bandgap.c>/dev/null > For example - the following changes are required for proper error return > documentation (following diff is just an hint): Although I think the above is a good thing to be done, I don't think it is considered mandatory, and for this reason, I don't believe the above should block this patch. Basically because, after this patch, at least kernel-doc runs successfully. Besides, there is very few evidence that ppl out there care much about "-v". A quick grep+awk would inform you this. If you consider the population of C files (around 35.4K files) inside the tree (simple find * | grep .*\\.[c,h]$ in your tree), only around 12.0% has structured comments. Out of the files that have structured comments, only about 11.0% has 0 warnings (including 0 warnings with -v), that's something like ~500 files. A considerable amount don't care about "-v" (34% out of the files with structured comments). Actually most of them don't care about warnings (89% out of the files with structured comments) at all. :-) That said, I am going to send a separate patch to fix the "-v" later on. Including your chunks below. Thanks for reviewing. > > diff --git a/drivers/staging/ti-soc-thermal/ti-bandgap.c b/drivers/staging/ti-soc-thermal/ti-bandgap.c > index d479e50..0adae05 100644 > --- a/drivers/staging/ti-soc-thermal/ti-bandgap.c > +++ b/drivers/staging/ti-soc-thermal/ti-bandgap.c > @@ -50,7 +50,7 @@ > * @reg: desired register (offset) to be read > * > * Helper function to read bandgap registers. It uses the io remapped area. > - * Returns the register value. > + * Return: the register value. > */ > static u32 ti_bandgap_readl(struct ti_bandgap *bgp, u32 reg) > { > @@ -97,6 +97,8 @@ do { \ > * > * Used to power on/off a bandgap device instance. Only used on those > * that features tempsoff bit. > + * > + * Return: 0 > */ > static int ti_bandgap_power(struct ti_bandgap *bgp, bool on) > { > @@ -122,6 +124,8 @@ exit: > * This function is desired because, depending on bandgap device version, > * it might be needed to freeze the bandgap state machine, before fetching > * the register value. > + * > + * Return: temperature in ... > */ > static u32 ti_bandgap_read_temp(struct ti_bandgap *bgp, int id) > { > @@ -162,6 +166,8 @@ static u32 ti_bandgap_read_temp(struct ti_bandgap *bgp, int id) > * conditions and acts accordingly. In case there are events pending, > * it will reset the event mask to wait for the opposite event (next event). > * Every time there is a new event, it will be reported to thermal layer. > + * > + * Return: IRQ_HANDLED > */ > static irqreturn_t ti_bandgap_talert_irq_handler(int irq, void *data) > { > @@ -222,6 +228,8 @@ static irqreturn_t ti_bandgap_talert_irq_handler(int irq, void *data) > * This is the Tshut handler. Use it only if bandgap device features > * HAS(TSHUT). If any sensor fires the Tshut signal, we simply shutdown > * the system. > + * > + * Return: IRQ_HANDLED > */ > static irqreturn_t ti_bandgap_tshut_irq_handler(int irq, void *data) > { > @@ -244,6 +252,8 @@ static irqreturn_t ti_bandgap_tshut_irq_handler(int irq, void *data) > * Simple conversion from ADC representation to mCelsius. In case the ADC value > * is out of the ADC conv table range, it returns -ERANGE, 0 on success. > * The conversion table is indexed by the ADC values. > + * > + * Return: 0 if converstion was successful, else -ERANGE if out of range > */ > static > int ti_bandgap_adc_to_mcelsius(struct ti_bandgap *bgp, int adc_val, int *t) > @@ -272,6 +282,8 @@ exit: > * Simple conversion from mCelsius to ADC values. In case the temp value > * is out of the ADC conv table range, it returns -ERANGE, 0 on success. > * The conversion table is indexed by the ADC values. > + * > + * Return: 0 if converstion was successful, else -ERANGE if out of range > */ > static > int ti_bandgap_mcelsius_to_adc(struct ti_bandgap *bgp, long temp, int *adc) > @@ -311,7 +323,8 @@ exit: > * @sum: address where to write the resulting temperature (in ADC scale) > * > * Adds an hysteresis value (in mCelsius) to a ADC temperature value. > - * Returns 0 on success, -ERANGE otherwise. > + * > + * Return: 0 on success, -ERANGE otherwise. > */ > static > int ti_bandgap_add_hyst(struct ti_bandgap *bgp, int adc_val, int hyst_val, > @@ -384,6 +397,8 @@ static void ti_bandgap_unmask_interrupts(struct ti_bandgap *bgp, int id, > * It checks the resulting t_hot and t_cold values, based on the new passed @val > * and configures the thresholds so that t_hot is always greater than t_cold. > * Call this function only if bandgap features HAS(TALERT). > + * > + * Return: 0 if no error, else corresponding error > */ > static int ti_bandgap_update_alert_threshold(struct ti_bandgap *bgp, int id, > int val, bool hot) > @@ -442,6 +457,8 @@ exit: > * > * Checks if the bandgap pointer is valid and if the sensor id is also > * applicable. > + * > + * Return: 0 if no errors, -EINVAL for bad parameter or -ERANGE if out of range > */ > static inline int ti_bandgap_validate(struct ti_bandgap *bgp, int id) > { > @@ -475,6 +492,8 @@ exit: > * This function can be used to update t_hot or t_cold, depending on @hot value. > * Validates the mCelsius range and update the requested threshold. > * Call this function only if bandgap features HAS(TALERT). > + * > + * Return: 0 if no error, else corresponding error value. > */ > static int _ti_bandgap_write_threshold(struct ti_bandgap *bgp, int id, int val, > bool hot) > @@ -529,6 +548,8 @@ exit: > * It will fetch the required thresholds (hot and cold) for TALERT signal. > * This function can be used to read t_hot or t_cold, depending on @hot value. > * Call this function only if bandgap features HAS(TALERT). > + * > + * Return: 0 if no error, if it has no TALERT support, returns -ENOTSUPP.... > */ > static int _ti_bandgap_read_threshold(struct ti_bandgap *bgp, int id, > int *val, bool hot) > @@ -575,7 +596,7 @@ exit: > * @id: sensor id > * @thot: resulting current thot value > * > - * returns 0 on success or the proper error code > + * Return: 0 on success or the proper error code > */ > int ti_bandgap_read_thot(struct ti_bandgap *bgp, int id, int *thot) > { > @@ -588,7 +609,7 @@ int ti_bandgap_read_thot(struct ti_bandgap *bgp, int id, int *thot) > * @id: sensor id > * @val: desired thot value > * > - * returns 0 on success or the proper error code > + * Return: 0 on success or the proper error code > */ > int ti_bandgap_write_thot(struct ti_bandgap *bgp, int id, int val) > { > @@ -601,7 +622,7 @@ int ti_bandgap_write_thot(struct ti_bandgap *bgp, int id, int val) > * @id: sensor id > * @tcold: resulting current tcold value > * > - * returns 0 on success or the proper error code > + * Return: 0 on success or the proper error code > */ > int ti_bandgap_read_tcold(struct ti_bandgap *bgp, int id, int *tcold) > { > @@ -614,7 +635,7 @@ int ti_bandgap_read_tcold(struct ti_bandgap *bgp, int id, int *tcold) > * @id: sensor id > * @val: desired tcold value > * > - * returns 0 on success or the proper error code > + * Return: 0 on success or the proper error code > */ > int ti_bandgap_write_tcold(struct ti_bandgap *bgp, int id, int val) > { > @@ -627,7 +648,7 @@ int ti_bandgap_write_tcold(struct ti_bandgap *bgp, int id, int val) > * @id: sensor id > * @interval: resulting update interval in miliseconds > * > - * returns 0 on success or the proper error code > + * Return: 0 on success or the proper error code > */ > int ti_bandgap_read_update_interval(struct ti_bandgap *bgp, int id, > int *interval) > @@ -659,7 +680,7 @@ int ti_bandgap_read_update_interval(struct ti_bandgap *bgp, int id, > * @id: sensor id > * @interval: desired update interval in miliseconds > * > - * returns 0 on success or the proper error code > + * Return: 0 on success or the proper error code > */ > int ti_bandgap_write_update_interval(struct ti_bandgap *bgp, > int id, u32 interval) > @@ -685,7 +706,7 @@ int ti_bandgap_write_update_interval(struct ti_bandgap *bgp, > * @id: sensor id > * @temperature: resulting temperature > * > - * returns 0 on success or the proper error code > + * Return: 0 on success or the proper error code > */ > int ti_bandgap_read_temperature(struct ti_bandgap *bgp, int id, > int *temperature) > @@ -717,7 +738,7 @@ int ti_bandgap_read_temperature(struct ti_bandgap *bgp, int id, > * @id: sensor id > * @data: thermal framework related data to be stored > * > - * returns 0 on success or the proper error code > + * Return: 0 on success or the proper error code > */ > int ti_bandgap_set_sensor_data(struct ti_bandgap *bgp, int id, void *data) > { > @@ -736,7 +757,7 @@ int ti_bandgap_set_sensor_data(struct ti_bandgap *bgp, int id, void *data) > * @bgp: pointer to bandgap instance > * @id: sensor id > * > - * returns data stored by set function with sensor id on success or NULL > + * Return: data stored by set function with sensor id on success or NULL > */ > void *ti_bandgap_get_sensor_data(struct ti_bandgap *bgp, int id) > { > @@ -756,6 +777,8 @@ void *ti_bandgap_get_sensor_data(struct ti_bandgap *bgp, int id) > * > * Used to initialize the conversion state machine and set it to a valid > * state. Called during device initialization and context restore events. > + * > + * Return: 0 > */ > static int > ti_bandgap_force_single_read(struct ti_bandgap *bgp, int id) > @@ -789,6 +812,8 @@ ti_bandgap_force_single_read(struct ti_bandgap *bgp, int id) > * be used for junction temperature monitoring, it is desirable that the > * sensors are operational all the time, so that alerts are generated > * properly. > + * > + * Return: 0 > */ > static int ti_bandgap_set_continuous_mode(struct ti_bandgap *bgp) > { > @@ -814,6 +839,8 @@ static int ti_bandgap_set_continuous_mode(struct ti_bandgap *bgp) > * to specify which GPIO line is used. TSHUT IRQ is fired anytime > * one of the bandgap sensors violates the TSHUT high/hot threshold. > * And in that case, the system must go off. > + * > + * Return: 0 if no error, else error status > */ > static int ti_bandgap_tshut_init(struct ti_bandgap *bgp, > struct platform_device *pdev) > @@ -853,6 +880,8 @@ static int ti_bandgap_tshut_init(struct ti_bandgap *bgp, > * TALERT is a normal IRQ and it is fired any time thresholds (hot or cold) > * are violated. In these situation, the driver must reprogram the thresholds, > * accordingly to specified policy. > + * > + * Return: 0 if no error, else return corresponding error. > */ > static int ti_bandgap_talert_init(struct ti_bandgap *bgp, > struct platform_device *pdev) > @@ -884,6 +913,9 @@ static const struct of_device_id of_ti_bandgap_match[]; > * Used to read the device tree properties accordingly to the bandgap > * matching version. Based on bandgap version and its capabilities it > * will build a struct ti_bandgap out of the required DT entries. > + * > + * Return: valid bandgap structure if successful, else returns ERR_PTR > + * return value must be verified with IS_ERR. > */ > static struct ti_bandgap *ti_bandgap_build(struct platform_device *pdev) > { > -- To unsubscribe from this list: send the line "unsubscribe linux-pm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Wed, Mar 20, 2013 at 6:56 AM, Eduardo Valentin <eduardo.valentin@ti.com> wrote: > On 19-03-2013 15:22, Nishanth Menon wrote: >> >> On 10:54-20130319, Eduardo Valentin wrote: [..] >> You may still want to fix warnings generated by: >> ./scripts/kernel-doc -v >> drivers/staging/ti-soc-thermal/ti-bandgap.c>/dev/null >> For example - the following changes are required for proper error return >> documentation (following diff is just an hint): > > > Although I think the above is a good thing to be done, I don't think it is > considered mandatory, and for this reason, I don't believe the above should > block this patch. Basically because, after this patch, at least kernel-doc > runs successfully. > > Besides, there is very few evidence that ppl out there care much about "-v". > A quick grep+awk would inform you this. If you consider the population of C > files (around 35.4K files) inside the tree (simple find * | grep .*\\.[c,h]$ > in your tree), only around 12.0% has structured comments. Out of the files > that have structured comments, only about 11.0% has 0 warnings (including 0 > warnings with -v), that's something like ~500 files. A considerable amount > don't care about "-v" (34% out of the files with structured comments). > Actually most of them don't care about warnings (89% out of the files with > structured comments) at all. :-) Yep, commit 4092bac7 > > That said, I am going to send a separate patch to fix the "-v" later on. > Including your chunks below. Thanks. Regards, Nishanth Menon -- To unsubscribe from this list: send the line "unsubscribe linux-pm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/staging/ti-soc-thermal/ti-bandgap.c b/drivers/staging/ti-soc-thermal/ti-bandgap.c index d479e50..0adae05 100644 --- a/drivers/staging/ti-soc-thermal/ti-bandgap.c +++ b/drivers/staging/ti-soc-thermal/ti-bandgap.c @@ -50,7 +50,7 @@ * @reg: desired register (offset) to be read * * Helper function to read bandgap registers. It uses the io remapped area. - * Returns the register value. + * Return: the register value. */ static u32 ti_bandgap_readl(struct ti_bandgap *bgp, u32 reg) { @@ -97,6 +97,8 @@ do { \ * * Used to power on/off a bandgap device instance. Only used on those * that features tempsoff bit. + * + * Return: 0 */ static int ti_bandgap_power(struct ti_bandgap *bgp, bool on) { @@ -122,6 +124,8 @@ exit: * This function is desired because, depending on bandgap device version, * it might be needed to freeze the bandgap state machine, before fetching * the register value. + * + * Return: temperature in ... */ static u32 ti_bandgap_read_temp(struct ti_bandgap *bgp, int id) { @@ -162,6 +166,8 @@ static u32 ti_bandgap_read_temp(struct ti_bandgap *bgp, int id) * conditions and acts accordingly. In case there are events pending, * it will reset the event mask to wait for the opposite event (next event). * Every time there is a new event, it will be reported to thermal layer. + * + * Return: IRQ_HANDLED */ static irqreturn_t ti_bandgap_talert_irq_handler(int irq, void *data) { @@ -222,6 +228,8 @@ static irqreturn_t ti_bandgap_talert_irq_handler(int irq, void *data) * This is the Tshut handler. Use it only if bandgap device features * HAS(TSHUT). If any sensor fires the Tshut signal, we simply shutdown * the system. + * + * Return: IRQ_HANDLED */ static irqreturn_t ti_bandgap_tshut_irq_handler(int irq, void *data) { @@ -244,6 +252,8 @@ static irqreturn_t ti_bandgap_tshut_irq_handler(int irq, void *data) * Simple conversion from ADC representation to mCelsius. In case the ADC value * is out of the ADC conv table range, it returns -ERANGE, 0 on success. * The conversion table is indexed by the ADC values. + * + * Return: 0 if converstion was successful, else -ERANGE if out of range */ static int ti_bandgap_adc_to_mcelsius(struct ti_bandgap *bgp, int adc_val, int *t) @@ -272,6 +282,8 @@ exit: * Simple conversion from mCelsius to ADC values. In case the temp value * is out of the ADC conv table range, it returns -ERANGE, 0 on success. * The conversion table is indexed by the ADC values. + * + * Return: 0 if converstion was successful, else -ERANGE if out of range */ static int ti_bandgap_mcelsius_to_adc(struct ti_bandgap *bgp, long temp, int *adc) @@ -311,7 +323,8 @@ exit: * @sum: address where to write the resulting temperature (in ADC scale) * * Adds an hysteresis value (in mCelsius) to a ADC temperature value. - * Returns 0 on success, -ERANGE otherwise. + * + * Return: 0 on success, -ERANGE otherwise. */ static int ti_bandgap_add_hyst(struct ti_bandgap *bgp, int adc_val, int hyst_val, @@ -384,6 +397,8 @@ static void ti_bandgap_unmask_interrupts(struct ti_bandgap *bgp, int id, * It checks the resulting t_hot and t_cold values, based on the new passed @val * and configures the thresholds so that t_hot is always greater than t_cold. * Call this function only if bandgap features HAS(TALERT). + * + * Return: 0 if no error, else corresponding error */ static int ti_bandgap_update_alert_threshold(struct ti_bandgap *bgp, int id, int val, bool hot) @@ -442,6 +457,8 @@ exit: * * Checks if the bandgap pointer is valid and if the sensor id is also * applicable. + * + * Return: 0 if no errors, -EINVAL for bad parameter or -ERANGE if out of range */ static inline int ti_bandgap_validate(struct ti_bandgap *bgp, int id) { @@ -475,6 +492,8 @@ exit: * This function can be used to update t_hot or t_cold, depending on @hot value. * Validates the mCelsius range and update the requested threshold. * Call this function only if bandgap features HAS(TALERT). + * + * Return: 0 if no error, else corresponding error value. */ static int _ti_bandgap_write_threshold(struct ti_bandgap *bgp, int id, int val, bool hot) @@ -529,6 +548,8 @@ exit: * It will fetch the required thresholds (hot and cold) for TALERT signal. * This function can be used to read t_hot or t_cold, depending on @hot value. * Call this function only if bandgap features HAS(TALERT). + * + * Return: 0 if no error, if it has no TALERT support, returns -ENOTSUPP.... */ static int _ti_bandgap_read_threshold(struct ti_bandgap *bgp, int id, int *val, bool hot) @@ -575,7 +596,7 @@ exit: * @id: sensor id * @thot: resulting current thot value * - * returns 0 on success or the proper error code + * Return: 0 on success or the proper error code */ int ti_bandgap_read_thot(struct ti_bandgap *bgp, int id, int *thot) { @@ -588,7 +609,7 @@ int ti_bandgap_read_thot(struct ti_bandgap *bgp, int id, int *thot) * @id: sensor id * @val: desired thot value * - * returns 0 on success or the proper error code + * Return: 0 on success or the proper error code */ int ti_bandgap_write_thot(struct ti_bandgap *bgp, int id, int val) { @@ -601,7 +622,7 @@ int ti_bandgap_write_thot(struct ti_bandgap *bgp, int id, int val) * @id: sensor id * @tcold: resulting current tcold value * - * returns 0 on success or the proper error code + * Return: 0 on success or the proper error code */ int ti_bandgap_read_tcold(struct ti_bandgap *bgp, int id, int *tcold) { @@ -614,7 +635,7 @@ int ti_bandgap_read_tcold(struct ti_bandgap *bgp, int id, int *tcold) * @id: sensor id * @val: desired tcold value * - * returns 0 on success or the proper error code + * Return: 0 on success or the proper error code */ int ti_bandgap_write_tcold(struct ti_bandgap *bgp, int id, int val) { @@ -627,7 +648,7 @@ int ti_bandgap_write_tcold(struct ti_bandgap *bgp, int id, int val) * @id: sensor id * @interval: resulting update interval in miliseconds * - * returns 0 on success or the proper error code + * Return: 0 on success or the proper error code */ int ti_bandgap_read_update_interval(struct ti_bandgap *bgp, int id, int *interval) @@ -659,7 +680,7 @@ int ti_bandgap_read_update_interval(struct ti_bandgap *bgp, int id, * @id: sensor id * @interval: desired update interval in miliseconds * - * returns 0 on success or the proper error code + * Return: 0 on success or the proper error code */ int ti_bandgap_write_update_interval(struct ti_bandgap *bgp, int id, u32 interval) @@ -685,7 +706,7 @@ int ti_bandgap_write_update_interval(struct ti_bandgap *bgp, * @id: sensor id * @temperature: resulting temperature * - * returns 0 on success or the proper error code + * Return: 0 on success or the proper error code */ int ti_bandgap_read_temperature(struct ti_bandgap *bgp, int id, int *temperature) @@ -717,7 +738,7 @@ int ti_bandgap_read_temperature(struct ti_bandgap *bgp, int id, * @id: sensor id * @data: thermal framework related data to be stored * - * returns 0 on success or the proper error code + * Return: 0 on success or the proper error code */ int ti_bandgap_set_sensor_data(struct ti_bandgap *bgp, int id, void *data) { @@ -736,7 +757,7 @@ int ti_bandgap_set_sensor_data(struct ti_bandgap *bgp, int id, void *data) * @bgp: pointer to bandgap instance * @id: sensor id * - * returns data stored by set function with sensor id on success or NULL + * Return: data stored by set function with sensor id on success or NULL */ void *ti_bandgap_get_sensor_data(struct ti_bandgap *bgp, int id) { @@ -756,6 +777,8 @@ void *ti_bandgap_get_sensor_data(struct ti_bandgap *bgp, int id) * * Used to initialize the conversion state machine and set it to a valid * state. Called during device initialization and context restore events. + * + * Return: 0 */ static int ti_bandgap_force_single_read(struct ti_bandgap *bgp, int id) @@ -789,6 +812,8 @@ ti_bandgap_force_single_read(struct ti_bandgap *bgp, int id) * be used for junction temperature monitoring, it is desirable that the * sensors are operational all the time, so that alerts are generated * properly. + * + * Return: 0 */ static int ti_bandgap_set_continuous_mode(struct ti_bandgap *bgp) { @@ -814,6 +839,8 @@ static int ti_bandgap_set_continuous_mode(struct ti_bandgap *bgp) * to specify which GPIO line is used. TSHUT IRQ is fired anytime * one of the bandgap sensors violates the TSHUT high/hot threshold. * And in that case, the system must go off. + * + * Return: 0 if no error, else error status */ static int ti_bandgap_tshut_init(struct ti_bandgap *bgp, struct platform_device *pdev) @@ -853,6 +880,8 @@ static int ti_bandgap_tshut_init(struct ti_bandgap *bgp, * TALERT is a normal IRQ and it is fired any time thresholds (hot or cold) * are violated. In these situation, the driver must reprogram the thresholds, * accordingly to specified policy. + * + * Return: 0 if no error, else return corresponding error. */ static int ti_bandgap_talert_init(struct ti_bandgap *bgp, struct platform_device *pdev) @@ -884,6 +913,9 @@ static const struct of_device_id of_ti_bandgap_match[]; * Used to read the device tree properties accordingly to the bandgap * matching version. Based on bandgap version and its capabilities it * will build a struct ti_bandgap out of the required DT entries. + * + * Return: valid bandgap structure if successful, else returns ERR_PTR + * return value must be verified with IS_ERR. */ static struct ti_bandgap *ti_bandgap_build(struct platform_device *pdev) {