diff options
author | Albert ARIBAUD <albert.u.boot@aribaud.net> | 2015-10-14 08:46:36 (GMT) |
---|---|---|
committer | Albert ARIBAUD <albert.u.boot@aribaud.net> | 2015-10-14 08:46:36 (GMT) |
commit | 13a3972585af60ec367d209cedbd3601e0c77467 (patch) | |
tree | 4b3312669b3e501f6bc10b39d8c7bbf516f07aac /drivers/thermal/imx_thermal.c | |
parent | 208bd51396fb606dbdcf45b064e6b372d7dd3e81 (diff) | |
parent | 297faccca2235e359012118495b9b73451d54bb9 (diff) | |
download | u-boot-13a3972585af60ec367d209cedbd3601e0c77467.tar.xz |
Merge remote-tracking branch 'u-boot/master'
Diffstat (limited to 'drivers/thermal/imx_thermal.c')
-rw-r--r-- | drivers/thermal/imx_thermal.c | 90 |
1 files changed, 86 insertions, 4 deletions
diff --git a/drivers/thermal/imx_thermal.c b/drivers/thermal/imx_thermal.c index 3c6c967..09a3c52 100644 --- a/drivers/thermal/imx_thermal.c +++ b/drivers/thermal/imx_thermal.c @@ -25,6 +25,9 @@ #define FACTOR1 15976 #define FACTOR2 4297157 #define MEASURE_FREQ 327 +#define TEMPERATURE_MIN -40 +#define TEMPERATURE_HOT 85 +#define TEMPERATURE_MAX 125 #define TEMPSENSE0_TEMP_CNT_SHIFT 8 #define TEMPSENSE0_TEMP_CNT_MASK (0xfff << TEMPSENSE0_TEMP_CNT_SHIFT) @@ -41,6 +44,7 @@ struct thermal_data { int maxc; }; +#if defined(CONFIG_MX6) static int read_cpu_temperature(struct udevice *dev) { int temperature; @@ -123,6 +127,73 @@ static int read_cpu_temperature(struct udevice *dev) return temperature; } +#elif defined(CONFIG_MX7) +static int read_cpu_temperature(struct udevice *dev) +{ + unsigned int reg, tmp, start; + unsigned int raw_25c, te1; + int temperature; + unsigned int *priv = dev_get_priv(dev); + u32 fuse = *priv; + struct mxc_ccm_anatop_reg *ccm_anatop = (struct mxc_ccm_anatop_reg *) + ANATOP_BASE_ADDR; + /* + * fuse data layout: + * [31:21] sensor value @ 25C + * [20:18] hot temperature value + * [17:9] sensor value of room + * [8:0] sensor value of hot + */ + + raw_25c = fuse >> 21; + if (raw_25c == 0) + raw_25c = 25; + + te1 = (fuse >> 9) & 0x1ff; + + /* + * now we only use single measure, every time we read + * the temperature, we will power on/down anadig thermal + * module + */ + writel(TEMPMON_HW_ANADIG_TEMPSENSE1_POWER_DOWN_MASK, &ccm_anatop->tempsense1_clr); + writel(PMU_REF_REFTOP_SELFBIASOFF_MASK, &ccm_anatop->ref_set); + + /* write measure freq */ + reg = readl(&ccm_anatop->tempsense1); + reg &= ~TEMPMON_HW_ANADIG_TEMPSENSE1_MEASURE_FREQ_MASK; + reg |= TEMPMON_HW_ANADIG_TEMPSENSE1_MEASURE_FREQ(MEASURE_FREQ); + writel(reg, &ccm_anatop->tempsense1); + + writel(TEMPMON_HW_ANADIG_TEMPSENSE1_MEASURE_TEMP_MASK, &ccm_anatop->tempsense1_clr); + writel(TEMPMON_HW_ANADIG_TEMPSENSE1_FINISHED_MASK, &ccm_anatop->tempsense1_clr); + writel(TEMPMON_HW_ANADIG_TEMPSENSE1_MEASURE_TEMP_MASK, &ccm_anatop->tempsense1_set); + + start = get_timer(0); + /* Wait max 100ms */ + do { + /* + * Since we can not rely on finish bit, use 1ms delay to get + * temperature. From RM, 17us is enough to get data, but + * to gurantee to get the data, delay 100ms here. + */ + reg = readl(&ccm_anatop->tempsense1); + tmp = (reg & TEMPMON_HW_ANADIG_TEMPSENSE1_TEMP_VALUE_MASK) + >> TEMPMON_HW_ANADIG_TEMPSENSE1_TEMP_VALUE_SHIFT; + } while (get_timer(0) < (start + 100)); + + writel(TEMPMON_HW_ANADIG_TEMPSENSE1_FINISHED_MASK, &ccm_anatop->tempsense1_clr); + + /* power down anatop thermal sensor */ + writel(TEMPMON_HW_ANADIG_TEMPSENSE1_POWER_DOWN_MASK, &ccm_anatop->tempsense1_set); + writel(PMU_REF_REFTOP_SELFBIASOFF_MASK, &ccm_anatop->ref_clr); + + /* Single point */ + temperature = tmp - (te1 - raw_25c); + + return temperature; +} +#endif int imx_thermal_get_temp(struct udevice *dev, int *temp) { @@ -130,6 +201,7 @@ int imx_thermal_get_temp(struct udevice *dev, int *temp) int cpu_tmp = 0; cpu_tmp = read_cpu_temperature(dev); + while (cpu_tmp >= priv->critical) { printf("CPU Temperature (%dC) too close to max (%dC)", cpu_tmp, priv->maxc); @@ -157,10 +229,20 @@ static int imx_thermal_probe(struct udevice *dev) /* Read Temperature calibration data fuse */ fuse_read(pdata->fuse_bank, pdata->fuse_word, &fuse); - /* Check for valid fuse */ - if (fuse == 0 || fuse == ~0) { - printf("CPU: Thermal invalid data, fuse: 0x%x\n", fuse); - return -EPERM; + if (is_soc_type(MXC_SOC_MX6)) { + /* Check for valid fuse */ + if (fuse == 0 || fuse == ~0) { + debug("CPU: Thermal invalid data, fuse: 0x%x\n", + fuse); + return -EPERM; + } + } else if (is_soc_type(MXC_SOC_MX7)) { + /* No Calibration data in FUSE? */ + if ((fuse & 0x3ffff) == 0) + return -EPERM; + /* We do not support 105C TE2 */ + if (((fuse & 0x1c0000) >> 18) == 0x6) + return -EPERM; } /* set critical cooling temp */ |