Hello, On Tue, Jul 17, 2018 at 04:24:16PM +0530, Viresh Kumar wrote: > A cooling map entry may now contain a list of phandles and their > arguments representing multiple devices which share the trip point. > > This patch updates the thermal OF core to parse them properly.
I am mostly fine with the patch idea, specially because we wont be breaking existing DT blobs out there. See comment below. > > Tested on Hikey960. > > Signed-off-by: Viresh Kumar <viresh.ku...@linaro.org> > --- > This is a follow up patch to the DT bindings patchset: > > https://lkml.kernel.org/r/cover.1530766981.git.viresh.ku...@linaro.org > > drivers/thermal/of-thermal.c | 140 +++++++++++++++++++++++++---------- > 1 file changed, 102 insertions(+), 38 deletions(-) > > diff --git a/drivers/thermal/of-thermal.c b/drivers/thermal/of-thermal.c > index 977a8307fbb1..79c06c4c861b 100644 > --- a/drivers/thermal/of-thermal.c > +++ b/drivers/thermal/of-thermal.c > @@ -19,22 +19,33 @@ > /*** Private data structures to represent thermal device tree data ***/ > > /** > - * struct __thermal_bind_param - a match between trip and cooling device > + * struct __thermal_cooling_bind_param - a cooling device for a trip point > * @cooling_device: a pointer to identify the referred cooling device > - * @trip_id: the trip point index > - * @usage: the percentage (from 0 to 100) of cooling contribution > * @min: minimum cooling state used at this trip point > * @max: maximum cooling state used at this trip point > */ > > -struct __thermal_bind_params { > +struct __thermal_cooling_bind_param { > struct device_node *cooling_device; > - unsigned int trip_id; > - unsigned int usage; > unsigned long min; > unsigned long max; > }; > > +/** > + * struct __thermal_bind_param - a match between trip and cooling device > + * @tcbp: a pointer to an array of cooling devices > + * @count: number of elements in array > + * @trip_id: the trip point index > + * @usage: the percentage (from 0 to 100) of cooling contribution > + */ > + > +struct __thermal_bind_params { > + struct __thermal_cooling_bind_param *tcbp; > + unsigned int count; > + unsigned int trip_id; > + unsigned int usage; > +}; Do you mind elaborating why you needed to do this split and adding a new struct? More important, please describe in your commit message. > + > /** > * struct __thermal_zone - internal representation of a thermal zone > * @mode: current thermal zone device mode (enabled/disabled) > @@ -192,25 +203,31 @@ static int of_thermal_bind(struct thermal_zone_device > *thermal, > struct thermal_cooling_device *cdev) > { > struct __thermal_zone *data = thermal->devdata; > - int i; > + struct __thermal_bind_params *tbp; > + struct __thermal_cooling_bind_param *tcbp; > + int i, j; > > if (!data || IS_ERR(data)) > return -ENODEV; > > /* find where to bind */ > for (i = 0; i < data->num_tbps; i++) { > - struct __thermal_bind_params *tbp = data->tbps + i; > + tbp = data->tbps + i; > > - if (tbp->cooling_device == cdev->np) { > - int ret; > + for (j = 0; j < tbp->count; j++) { > + tcbp = tbp->tcbp + j; > > - ret = thermal_zone_bind_cooling_device(thermal, > + if (tcbp->cooling_device == cdev->np) { > + int ret; > + > + ret = thermal_zone_bind_cooling_device(thermal, > tbp->trip_id, cdev, > - tbp->max, > - tbp->min, > + tcbp->max, > + tcbp->min, > tbp->usage); > - if (ret) > - return ret; > + if (ret) > + return ret; > + } > } > } > > @@ -221,22 +238,28 @@ static int of_thermal_unbind(struct thermal_zone_device > *thermal, > struct thermal_cooling_device *cdev) > { > struct __thermal_zone *data = thermal->devdata; > - int i; > + struct __thermal_bind_params *tbp; > + struct __thermal_cooling_bind_param *tcbp; > + int i, j; > > if (!data || IS_ERR(data)) > return -ENODEV; > > /* find where to unbind */ > for (i = 0; i < data->num_tbps; i++) { > - struct __thermal_bind_params *tbp = data->tbps + i; > + tbp = data->tbps + i; > + > + for (j = 0; j < tbp->count; j++) { > + tcbp = tbp->tcbp + j; > > - if (tbp->cooling_device == cdev->np) { > - int ret; > + if (tcbp->cooling_device == cdev->np) { > + int ret; > > - ret = thermal_zone_unbind_cooling_device(thermal, > - tbp->trip_id, cdev); > - if (ret) > - return ret; > + ret = > thermal_zone_unbind_cooling_device(thermal, > + tbp->trip_id, cdev); > + if (ret) > + return ret; > + } > } > } > > @@ -652,8 +675,9 @@ static int thermal_of_populate_bind_params(struct > device_node *np, > int ntrips) > { > struct of_phandle_args cooling_spec; > + struct __thermal_cooling_bind_param *__tcbp; > struct device_node *trip; > - int ret, i; > + int ret, i, count; > u32 prop; > > /* Default weight. Usage is optional */ > @@ -680,20 +704,44 @@ static int thermal_of_populate_bind_params(struct > device_node *np, > goto end; > } > > - ret = of_parse_phandle_with_args(np, "cooling-device", "#cooling-cells", > - 0, &cooling_spec); > - if (ret < 0) { > + count = of_count_phandle_with_args(np, "cooling-device", > + "#cooling-cells"); > + if (!count) { > pr_err("missing cooling_device property\n"); Probably the above error message deserves a better fit to the current situation. Maybe: + pr_err("Add a cooling_device property with at least one device\n"); > goto end; > } > - __tbp->cooling_device = cooling_spec.np; > - if (cooling_spec.args_count >= 2) { /* at least min and max */ > - __tbp->min = cooling_spec.args[0]; > - __tbp->max = cooling_spec.args[1]; > - } else { > - pr_err("wrong reference to cooling device, missing limits\n"); > + > + __tcbp = kcalloc(count, sizeof(*__tcbp), GFP_KERNEL); > + if (!__tcbp) > + goto end; > + > + for (i = 0; i < count; i++) { > + ret = of_parse_phandle_with_args(np, "cooling-device", > + "#cooling-cells", i, &cooling_spec); > + if (ret < 0) { > + pr_err("missing cooling_device property\n"); Here is a wrongly written cooling_device phandle, no? > + goto free_tcbp; > + } > + > + __tcbp[i].cooling_device = cooling_spec.np; > + > + if (cooling_spec.args_count >= 2) { /* at least min and max */ > + __tcbp[i].min = cooling_spec.args[0]; > + __tcbp[i].max = cooling_spec.args[1]; > + } else { > + pr_err("wrong reference to cooling device, missing > limits\n"); > + } > } > > + __tbp->tcbp= __tcbp; > + __tbp->count = count; > + > + goto end; > + > +free_tcbp: > + for (i = i - 1; i >= 0; i--) > + of_node_put(__tcbp[i].cooling_device); > + kfree(__tcbp); > end: > of_node_put(trip); > > @@ -900,8 +948,16 @@ __init *thermal_of_build_thermal_zone(struct device_node > *np) > return tz; > > free_tbps: > - for (i = i - 1; i >= 0; i--) > - of_node_put(tz->tbps[i].cooling_device); > + for (i = i - 1; i >= 0; i--) { > + struct __thermal_bind_params *tbp = tz->tbps + i; > + int j; > + > + for (j = 0; j < tbp->count; j++) > + of_node_put(tbp->tcbp[j].cooling_device); > + > + kfree(tbp->tcbp); > + } > + > kfree(tz->tbps); > free_trips: > for (i = 0; i < tz->ntrips; i++) > @@ -917,10 +973,18 @@ __init *thermal_of_build_thermal_zone(struct > device_node *np) > > static inline void of_thermal_free_zone(struct __thermal_zone *tz) > { > - int i; > + struct __thermal_bind_params *tbp; > + int i, j; > + > + for (i = 0; i < tz->num_tbps; i++) { > + tbp = tz->tbps + i; > + > + for (j = 0; j < tbp->count; j++) > + of_node_put(tbp->tcbp[j].cooling_device); > + > + kfree(tbp->tcbp); > + } > > - for (i = 0; i < tz->num_tbps; i++) > - of_node_put(tz->tbps[i].cooling_device); > kfree(tz->tbps); > for (i = 0; i < tz->ntrips; i++) > of_node_put(tz->trips[i].np); > -- > 2.18.0.rc1.242.g61856ae69a2c >
