@@ -250,20 +250,43 @@ static void sanitize_temp_error(struct exynos_tmu_data *data, u32 trim_info)
}
static int exynos_tmu_initialize(struct platform_device *pdev)
+{
+ struct exynos_tmu_data *data = platform_get_drvdata(pdev);
+ unsigned int status;
+ int ret = 0;
+
+ mutex_lock(&data->lock);
+
+ status = readb(data->base + EXYNOS_TMU_REG_STATUS);
+ if (!status) {
+ ret = -EBUSY;
+ } else {
+ data->tmu_initialize(pdev);
+ data->tmu_clear_irqs(data);
+ }
+
+ mutex_unlock(&data->lock);
+
+ return ret;
+}
+
+static int exynos_thermal_zone_configure(struct platform_device *pdev)
{
struct exynos_tmu_data *data = platform_get_drvdata(pdev);
struct thermal_zone_device *tzd = data->tzd;
int num_trips = thermal_zone_get_num_trips(tzd);
- unsigned int status;
int ret = 0, temp;
ret = thermal_zone_get_crit_temp(tzd, &temp);
+
if (ret && data->soc != SOC_ARCH_EXYNOS5433) { /* FIXME */
dev_err(&pdev->dev,
"No CRITICAL trip point defined in device tree!\n");
- goto out;
+ goto err;
}
+ mutex_lock(&data->lock);
+
if (num_trips > data->ntrip) {
dev_info(&pdev->dev,
"More trip points than supported by this TMU.\n");
@@ -272,36 +295,23 @@ static int exynos_tmu_initialize(struct platform_device *pdev)
num_trips - data->ntrip);
}
- mutex_lock(&data->lock);
+ int i, ntrips = min_t(int, num_trips, data->ntrip);
- status = readb(data->base + EXYNOS_TMU_REG_STATUS);
- if (!status) {
- ret = -EBUSY;
- } else {
- int i, ntrips =
- min_t(int, num_trips, data->ntrip);
+ /* Write temperature code for rising and falling threshold */
+ for (i = 0; i < ntrips; i++) {
+ struct thermal_trip trip;
- data->tmu_initialize(pdev);
+ ret = thermal_zone_get_trip(tzd, i, &trip);
+ if (ret)
+ goto err;
- /* Write temperature code for rising and falling threshold */
- for (i = 0; i < ntrips; i++) {
-
- struct thermal_trip trip;
-
- ret = thermal_zone_get_trip(tzd, i, &trip);
- if (ret)
- goto err;
-
- data->tmu_set_trip_temp(data, i, trip.temperature / MCELSIUS);
- data->tmu_set_trip_hyst(data, i, trip.temperature / MCELSIUS,
- trip.hysteresis / MCELSIUS);
- }
-
- data->tmu_clear_irqs(data);
+ data->tmu_set_trip_temp(data, i, trip.temperature / MCELSIUS);
+ data->tmu_set_trip_hyst(data, i, trip.temperature / MCELSIUS,
+ trip.hysteresis / MCELSIUS);
}
-err:
+
mutex_unlock(&data->lock);
-out:
+err:
return ret;
}
@@ -1006,10 +1016,12 @@ static int exynos_tmu_probe(struct platform_device *pdev)
break;
}
- /*
- * data->tzd must be registered before calling exynos_tmu_initialize(),
- * requesting irq and calling exynos_tmu_control().
- */
+ ret = exynos_tmu_initialize(pdev);
+ if (ret) {
+ dev_err(&pdev->dev, "Failed to initialize TMU\n");
+ return ret;
+ }
+
data->tzd = devm_thermal_of_zone_register(&pdev->dev, 0, data,
&exynos_sensor_ops);
if (IS_ERR(data->tzd)) {
@@ -1020,9 +1032,9 @@ static int exynos_tmu_probe(struct platform_device *pdev)
return ret;
}
- ret = exynos_tmu_initialize(pdev);
+ ret = exynos_thermal_zone_configure(pdev);
if (ret) {
- dev_err(&pdev->dev, "Failed to initialize TMU\n");
+ dev_err(&pdev->dev, "Failed to configure the thermal zone\n");
return ret;
}
This will be needed in the future, as the thermal zone subsystem might call our callbacks right after devm_thermal_of_zone_register. Currently we just make get_temp return EAGAIN in such case, but this will not be possible with state-modifying callbacks, for instance set_trips. Signed-off-by: Mateusz Majewski <m.majewski2@samsung.com> --- drivers/thermal/samsung/exynos_tmu.c | 78 ++++++++++++++++------------ 1 file changed, 45 insertions(+), 33 deletions(-)