forked from rubenslte/android_kernel_samsung_msm8226
msm: thermal: Add thermal reset feature to KTM
Add support for issuing a thermal reset from msm thermal driver. The thermal driver is capable of monitoring all the tsens temperatures and issuing a reset right from the boot. The reset temperature can be given as input using devicetree. Failure to do so will disable this feature for the target. Change-Id: Iaf8f1764d4e4e3abb7e65f1d4397d895d195636d Signed-off-by: Ram Chandrasekar <rkumbako@codeaurora.org>
This commit is contained in:
Ram Chandrasekar
committed by
Manaf Meethalavalappu Pallikunhi
Manaf Meethalavalappu Pallikunhi
parent
9d80b06852
commit
750153998d
@@ -100,6 +100,12 @@ Optional properties
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- qcom,efuse-temperature-map: Truth table of efuse value temperature value pair for
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different parts. if qcom,default temp is defined, then it can
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specify only pairs which deviate from default temperature.
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- qcom,therm-reset-temp: Degree above which the KTM will initiate a secure watchdog reset.
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When this property is defined, KTM will monitor all the tsens from
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boot time and will initiate a secure watchdog reset if any of the
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tsens temperature reaches this threshold. This reset helps in
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generating more informative crash dumps opposed to the crash dump
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generated by the hardware reset.
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Optional child nodes
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- qti,pmic-opt-curr-temp: Threshold temperature for requesting optimum current (request
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@@ -139,6 +145,7 @@ Example:
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qcom,temp-hysteresis = <10>;
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qcom,freq-step = <2>;
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qcom,freq-control-mask = <0xf>
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qcom,therm-reset-temp = <115>;
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qcom,core-limit-temp = <90>;
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qcom,core-temp-hysteresis = <10>;
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qcom,core-control-mask = <7>;
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@@ -39,6 +39,8 @@
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#include <mach/rpm-regulator-smd.h>
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#include <linux/regulator/consumer.h>
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#include <linux/msm_thermal_ioctl.h>
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#include <mach/rpm-smd.h>
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#include <mach/scm.h>
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#define MAX_CURRENT_UA 1000000
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#define MAX_RAILS 5
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@@ -46,6 +48,7 @@
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#define MONITOR_ALL_TSENS -1
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#define BYTES_PER_FUSE_ROW 8
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#define MAX_EFUSE_VALUE 16
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#define THERM_SECURE_BITE_CMD 8
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static struct msm_thermal_data msm_thermal_info;
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static struct delayed_work check_temp_work;
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@@ -89,6 +92,7 @@ static bool ocr_nodes_called;
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static bool ocr_probed;
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static bool interrupt_mode_enable;
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static bool msm_thermal_probed;
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static bool therm_reset_enabled;
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static int *tsens_id_map;
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static DEFINE_MUTEX(vdd_rstr_mutex);
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static DEFINE_MUTEX(psm_mutex);
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@@ -169,6 +173,7 @@ struct psm_rail {
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};
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enum msm_thresh_list {
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MSM_THERM_RESET,
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MSM_VDD_RESTRICTION,
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MSM_LIST_MAX_NR,
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};
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@@ -929,6 +934,73 @@ set_threshold_exit:
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return ret;
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}
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static void msm_thermal_bite(int tsens_id, long temp)
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{
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pr_err("TSENS:%d reached temperature:%ld. System reset\n",
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tsens_id, temp);
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scm_call_atomic1(SCM_SVC_BOOT, THERM_SECURE_BITE_CMD, 0);
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}
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static int do_therm_reset(void)
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{
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int ret = 0, i;
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long temp = 0;
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if (!therm_reset_enabled)
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return ret;
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for (i = 0; i < thresh[MSM_THERM_RESET].thresh_ct; i++) {
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ret = therm_get_temp(
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thresh[MSM_THERM_RESET].thresh_list[i].sensor_id,
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THERM_TSENS_ID,
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&temp);
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if (ret) {
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pr_err("Unable to read TSENS sensor:%d. err:%d\n",
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thresh[MSM_THERM_RESET].thresh_list[i].sensor_id,
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ret);
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continue;
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}
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if (temp >= msm_thermal_info.therm_reset_temp_degC)
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msm_thermal_bite(
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thresh[MSM_THERM_RESET].thresh_list[i].sensor_id, temp);
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}
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return ret;
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}
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static void therm_reset_notify(struct therm_threshold *thresh_data)
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{
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long temp;
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int ret = 0;
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if (!therm_reset_enabled)
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return;
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if (!thresh_data) {
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pr_err("Invalid input\n");
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return;
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}
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switch (thresh_data->trip_triggered) {
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case THERMAL_TRIP_CONFIGURABLE_HI:
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ret = therm_get_temp(thresh_data->sensor_id,
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THERM_TSENS_ID, &temp);
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if (ret)
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pr_err("Unable to read TSENS sensor:%d. err:%d\n",
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thresh_data->sensor_id, ret);
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msm_thermal_bite(tsens_id_map[thresh_data->sensor_id],
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temp);
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break;
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case THERMAL_TRIP_CONFIGURABLE_LOW:
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break;
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default:
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pr_err("Invalid trip type\n");
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break;
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}
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set_threshold(thresh_data->sensor_id, thresh_data->threshold);
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}
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#ifdef CONFIG_SMP
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static void __ref do_core_control(long temp)
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{
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@@ -1266,6 +1338,8 @@ static void __ref check_temp(struct work_struct *work)
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long temp = 0;
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int ret = 0;
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do_therm_reset();
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ret = therm_get_temp(msm_thermal_info.sensor_id, THERM_TSENS_ID, &temp);
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if (ret) {
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pr_err("Unable to read TSENS sensor:%d. err:%d\n",
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@@ -1740,6 +1814,9 @@ static void thermal_monitor_init(void)
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goto init_exit;
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}
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if (therm_reset_enabled)
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therm_set_threshold(&thresh[MSM_THERM_RESET]);
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if (vdd_rstr_enabled)
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therm_set_threshold(&thresh[MSM_VDD_RESTRICTION]);
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@@ -3047,6 +3124,38 @@ hotplug_node_fail:
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return ret;
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}
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static int probe_therm_reset(struct device_node *node,
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struct msm_thermal_data *data,
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struct platform_device *pdev)
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{
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char *key = NULL;
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int ret = 0;
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key = "qcom,therm-reset-temp";
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ret = of_property_read_u32(node, key, &data->therm_reset_temp_degC);
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if (ret)
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goto PROBE_RESET_EXIT;
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ret = init_threshold(MSM_THERM_RESET, MONITOR_ALL_TSENS,
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data->therm_reset_temp_degC, data->therm_reset_temp_degC - 10,
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therm_reset_notify);
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if (ret) {
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pr_err("Therm reset data structure init failed\n");
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goto PROBE_RESET_EXIT;
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}
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therm_reset_enabled = true;
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PROBE_RESET_EXIT:
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if (ret) {
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dev_info(&pdev->dev,
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"%s:Failed reading node=%s, key=%s err=%d. KTM continues\n",
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__func__, node->full_name, key, ret);
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therm_reset_enabled = false;
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}
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return ret;
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}
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static int probe_freq_mitigation(struct device_node *node,
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struct msm_thermal_data *data,
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struct platform_device *pdev)
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@@ -3132,6 +3241,8 @@ static int __devinit msm_thermal_dev_probe(struct platform_device *pdev)
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ret = probe_cc(node, &data, pdev);
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ret = probe_freq_mitigation(node, &data, pdev);
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ret = probe_therm_reset(node, &data, pdev);
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/*
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* Probe optional properties below. Call probe_psm before
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* probe_vdd_rstr because rpm_regulator_get has to be called
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@@ -36,6 +36,7 @@ struct msm_thermal_data {
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int32_t psm_temp_hyst_degC;
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int32_t ocr_temp_degC;
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int32_t ocr_temp_hyst_degC;
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int32_t therm_reset_temp_degC;
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};
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#ifdef CONFIG_THERMAL_MONITOR
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