diff options
Diffstat (limited to 'target/linux/layerscape/patches-5.4/818-thermal-0002-thermal-qoriq-Add-device-cooling-support.patch')
| -rw-r--r-- | target/linux/layerscape/patches-5.4/818-thermal-0002-thermal-qoriq-Add-device-cooling-support.patch | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/target/linux/layerscape/patches-5.4/818-thermal-0002-thermal-qoriq-Add-device-cooling-support.patch b/target/linux/layerscape/patches-5.4/818-thermal-0002-thermal-qoriq-Add-device-cooling-support.patch new file mode 100644 index 0000000000..4777ce939c --- /dev/null +++ b/target/linux/layerscape/patches-5.4/818-thermal-0002-thermal-qoriq-Add-device-cooling-support.patch @@ -0,0 +1,145 @@ +From 0a5d1b571ba5bca9c6737572ea4c8b1ad896c3fc Mon Sep 17 00:00:00 2001 +From: Anson Huang <Anson.Huang@nxp.com> +Date: Wed, 7 Aug 2019 13:24:26 +0800 +Subject: [PATCH] thermal: qoriq: Add device cooling support + +Register device cooling for first thermal zone manually, when +temperature exceeds passive trip, system wide cooling notification +will be triggered. + +Signed-off-by: Anson Huang <Anson.Huang@nxp.com> +--- + drivers/thermal/qoriq_thermal.c | 80 ++++++++++++++++++++++++++++++++++++++++- + 1 file changed, 79 insertions(+), 1 deletion(-) + +--- a/drivers/thermal/qoriq_thermal.c ++++ b/drivers/thermal/qoriq_thermal.c +@@ -3,6 +3,7 @@ + // Copyright 2016 Freescale Semiconductor, Inc. + + #include <linux/clk.h> ++#include <linux/device_cooling.h> + #include <linux/module.h> + #include <linux/platform_device.h> + #include <linux/err.h> +@@ -14,6 +15,7 @@ + #include "thermal_core.h" + + #define SITES_MAX 16 ++#define TMU_TEMP_PASSIVE_COOL_DELTA 10000 + + /* + * QorIQ TMU Registers +@@ -69,6 +71,9 @@ struct qoriq_sensor { + struct thermal_zone_device *tzd; + struct qoriq_tmu_data *qdata; + int id; ++ int temp_passive; ++ int temp_critical; ++ struct thermal_cooling_device *cdev; + }; + + struct qoriq_tmu_data { +@@ -78,6 +83,12 @@ struct qoriq_tmu_data { + struct qoriq_sensor *sensor[SITES_MAX]; + }; + ++enum tmu_trip { ++ TMU_TRIP_PASSIVE, ++ TMU_TRIP_CRITICAL, ++ TMU_TRIP_NUM, ++}; ++ + static void tmu_write(struct qoriq_tmu_data *p, u32 val, void __iomem *addr) + { + if (p->little_endian) +@@ -106,14 +117,51 @@ static int tmu_get_temp(void *p, int *te + return 0; + } + ++static int tmu_get_trend(void *p, int trip, enum thermal_trend *trend) ++{ ++ struct qoriq_sensor *qsensor = p; ++ int trip_temp; ++ ++ if (!qsensor->tzd) ++ return 0; ++ ++ trip_temp = (trip == TMU_TRIP_PASSIVE) ? qsensor->temp_passive : ++ qsensor->temp_critical; ++ ++ if (qsensor->tzd->temperature >= ++ (trip_temp - TMU_TEMP_PASSIVE_COOL_DELTA)) ++ *trend = THERMAL_TREND_RAISE_FULL; ++ else ++ *trend = THERMAL_TREND_DROP_FULL; ++ ++ return 0; ++} ++ ++static int tmu_set_trip_temp(void *p, int trip, ++ int temp) ++{ ++ struct qoriq_sensor *qsensor = p; ++ ++ if (trip == TMU_TRIP_CRITICAL) ++ qsensor->temp_critical = temp; ++ ++ if (trip == TMU_TRIP_PASSIVE) ++ qsensor->temp_passive = temp; ++ ++ return 0; ++} ++ + static const struct thermal_zone_of_device_ops tmu_tz_ops = { + .get_temp = tmu_get_temp, ++ .get_trend = tmu_get_trend, ++ .set_trip_temp = tmu_set_trip_temp, + }; + + static int qoriq_tmu_register_tmu_zone(struct platform_device *pdev) + { + struct qoriq_tmu_data *qdata = platform_get_drvdata(pdev); +- int id, sites = 0; ++ const struct thermal_trip *trip; ++ int id, sites = 0, ret; + + for (id = 0; id < SITES_MAX; id++) { + qdata->sensor[id] = devm_kzalloc(&pdev->dev, +@@ -132,6 +180,36 @@ static int qoriq_tmu_register_tmu_zone(s + return PTR_ERR(qdata->sensor[id]->tzd); + } + ++ /* first thermal zone takes care of system-wide device cooling */ ++ if (id == 0) { ++ qdata->sensor[id]->cdev = devfreq_cooling_register(); ++ if (IS_ERR(qdata->sensor[id]->cdev)) { ++ ret = PTR_ERR(qdata->sensor[id]->cdev); ++ pr_err("failed to register devfreq cooling device: %d\n", ++ ret); ++ return ret; ++ } ++ ++ ret = thermal_zone_bind_cooling_device(qdata->sensor[id]->tzd, ++ TMU_TRIP_PASSIVE, ++ qdata->sensor[id]->cdev, ++ THERMAL_NO_LIMIT, ++ THERMAL_NO_LIMIT, ++ THERMAL_WEIGHT_DEFAULT); ++ if (ret) { ++ pr_err("binding zone %s with cdev %s failed:%d\n", ++ qdata->sensor[id]->tzd->type, ++ qdata->sensor[id]->cdev->type, ++ ret); ++ devfreq_cooling_unregister(qdata->sensor[id]->cdev); ++ return ret; ++ } ++ ++ trip = of_thermal_get_trip_points(qdata->sensor[id]->tzd); ++ qdata->sensor[id]->temp_passive = trip[0].temperature; ++ qdata->sensor[id]->temp_critical = trip[1].temperature; ++ } ++ + sites |= 0x1 << (15 - id); + } + |