diff options
Diffstat (limited to 'target/linux/imx6/patches-4.3/045-imx-thermal-use-cpu-temperature-grade-info-for-thresholds')
| -rw-r--r-- | target/linux/imx6/patches-4.3/045-imx-thermal-use-cpu-temperature-grade-info-for-thresholds | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/target/linux/imx6/patches-4.3/045-imx-thermal-use-cpu-temperature-grade-info-for-thresholds b/target/linux/imx6/patches-4.3/045-imx-thermal-use-cpu-temperature-grade-info-for-thresholds new file mode 100644 index 0000000000..95524776c9 --- /dev/null +++ b/target/linux/imx6/patches-4.3/045-imx-thermal-use-cpu-temperature-grade-info-for-thresholds @@ -0,0 +1,114 @@ +Index: linux-4.3/drivers/thermal/imx_thermal.c +=================================================================== +--- linux-4.3.orig/drivers/thermal/imx_thermal.c 2015-11-01 16:05:25.000000000 -0800 ++++ linux-4.3/drivers/thermal/imx_thermal.c 2015-12-18 10:39:44.915158318 -0800 +@@ -55,6 +55,7 @@ + #define TEMPSENSE2_PANIC_VALUE_SHIFT 16 + #define TEMPSENSE2_PANIC_VALUE_MASK 0xfff0000 + ++#define OCOTP_MEM0 0x0480 + #define OCOTP_ANA1 0x04e0 + + /* The driver supports 1 passive trip point and 1 critical trip point */ +@@ -64,12 +65,6 @@ + IMX_TRIP_NUM, + }; + +-/* +- * It defines the temperature in millicelsius for passive trip point +- * that will trigger cooling action when crossed. +- */ +-#define IMX_TEMP_PASSIVE 85000 +- + #define IMX_POLLING_DELAY 2000 /* millisecond */ + #define IMX_PASSIVE_DELAY 1000 + +@@ -100,12 +95,14 @@ + u32 c1, c2; /* See formula in imx_get_sensor_data() */ + int temp_passive; + int temp_critical; ++ unsigned long temp_max; + int alarm_temp; + int last_temp; + bool irq_enabled; + int irq; + struct clk *thermal_clk; + const struct thermal_soc_data *socdata; ++ const char *temp_grade; + }; + + static void imx_set_panic_temp(struct imx_thermal_data *data, +@@ -285,10 +282,12 @@ + { + struct imx_thermal_data *data = tz->devdata; + ++ /* do not allow changing critical threshold */ + if (trip == IMX_TRIP_CRITICAL) + return -EPERM; + +- if (temp > IMX_TEMP_PASSIVE) ++ /* do not allow passive to be set higher than critical */ ++ if (temp < 0 || temp > data->temp_critical) + return -EINVAL; + + data->temp_passive = temp; +@@ -404,17 +403,39 @@ + data->c1 = temp64; + data->c2 = n1 * data->c1 + 1000 * t1; + +- /* +- * Set the default passive cooling trip point, +- * can be changed from userspace. +- */ +- data->temp_passive = IMX_TEMP_PASSIVE; ++ /* use OTP for thermal grade */ ++ ret = regmap_read(map, OCOTP_MEM0, &val); ++ if (ret) { ++ dev_err(&pdev->dev, "failed to read temp grade: %d\n", ret); ++ return ret; ++ } ++ ++ /* The maximum die temp is specified by the Temperature Grade */ ++ switch ((val >> 6) & 0x3) { ++ case 0: /* Commercial (0 to 95C) */ ++ data->temp_grade = "Commercial"; ++ data->temp_max = 95000; ++ break; ++ case 1: /* Extended Commercial (-20 to 105C) */ ++ data->temp_grade = "Extended Commercial"; ++ data->temp_max = 105000; ++ break; ++ case 2: /* Industrial (-40 to 105C) */ ++ data->temp_grade = "Industrial"; ++ data->temp_max = 105000; ++ break; ++ case 3: /* Automotive (-40 to 125C) */ ++ data->temp_grade = "Automotive"; ++ data->temp_max = 125000; ++ break; ++ } + + /* +- * The maximum die temperature set to 20 C higher than +- * IMX_TEMP_PASSIVE. ++ * Set the critical trip point at 5C under max ++ * Set the passive trip point at 10C under max (can change via sysfs) + */ +- data->temp_critical = 1000 * 20 + data->temp_passive; ++ data->temp_critical = data->temp_max - (1000 * 5); ++ data->temp_passive = data->temp_max - (1000 * 10); + + return 0; + } +@@ -559,6 +580,11 @@ + return ret; + } + ++ dev_info(&pdev->dev, "%s CPU temperature grade - max:%ldC" ++ " critical:%ldC passive:%ldC\n", data->temp_grade, ++ data->temp_max / 1000, data->temp_critical / 1000, ++ data->temp_passive / 1000); ++ + /* Enable measurements at ~ 10 Hz */ + regmap_write(map, TEMPSENSE1 + REG_CLR, TEMPSENSE1_MEASURE_FREQ); + measure_freq = DIV_ROUND_UP(32768, 10); /* 10 Hz */ |