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@ -25,6 +25,9 @@ |
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#define FACTOR1 15976 |
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#define FACTOR2 4297157 |
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#define MEASURE_FREQ 327 |
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#define TEMPERATURE_MIN -40 |
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#define TEMPERATURE_HOT 85 |
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#define TEMPERATURE_MAX 125 |
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#define TEMPSENSE0_TEMP_CNT_SHIFT 8 |
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#define TEMPSENSE0_TEMP_CNT_MASK (0xfff << TEMPSENSE0_TEMP_CNT_SHIFT) |
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@ -41,7 +44,8 @@ struct thermal_data { |
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int maxc; |
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}; |
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static int read_cpu_temperature_mx6(struct udevice *dev) |
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#if defined(CONFIG_MX6) |
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static int read_cpu_temperature(struct udevice *dev) |
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{ |
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int temperature; |
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unsigned int reg, n_meas; |
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@ -123,21 +127,87 @@ static int read_cpu_temperature_mx6(struct udevice *dev) |
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return temperature; |
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} |
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#elif defined(CONFIG_MX7) |
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static int read_cpu_temperature(struct udevice *dev) |
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{ |
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unsigned int reg, tmp, start; |
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unsigned int raw_25c, te1; |
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int temperature; |
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unsigned int *priv = dev_get_priv(dev); |
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u32 fuse = *priv; |
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struct mxc_ccm_anatop_reg *ccm_anatop = (struct mxc_ccm_anatop_reg *) |
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ANATOP_BASE_ADDR; |
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/*
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* fuse data layout: |
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* [31:21] sensor value @ 25C |
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* [20:18] hot temperature value |
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* [17:9] sensor value of room |
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* [8:0] sensor value of hot |
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*/ |
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raw_25c = fuse >> 21; |
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if (raw_25c == 0) |
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raw_25c = 25; |
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te1 = (fuse >> 9) & 0x1ff; |
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/*
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* now we only use single measure, every time we read |
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* the temperature, we will power on/down anadig thermal |
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* module |
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*/ |
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writel(TEMPMON_HW_ANADIG_TEMPSENSE1_POWER_DOWN_MASK, &ccm_anatop->tempsense1_clr); |
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writel(PMU_REF_REFTOP_SELFBIASOFF_MASK, &ccm_anatop->ref_set); |
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/* write measure freq */ |
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reg = readl(&ccm_anatop->tempsense1); |
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reg &= ~TEMPMON_HW_ANADIG_TEMPSENSE1_MEASURE_FREQ_MASK; |
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reg |= TEMPMON_HW_ANADIG_TEMPSENSE1_MEASURE_FREQ(MEASURE_FREQ); |
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writel(reg, &ccm_anatop->tempsense1); |
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writel(TEMPMON_HW_ANADIG_TEMPSENSE1_MEASURE_TEMP_MASK, &ccm_anatop->tempsense1_clr); |
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writel(TEMPMON_HW_ANADIG_TEMPSENSE1_FINISHED_MASK, &ccm_anatop->tempsense1_clr); |
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writel(TEMPMON_HW_ANADIG_TEMPSENSE1_MEASURE_TEMP_MASK, &ccm_anatop->tempsense1_set); |
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start = get_timer(0); |
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/* Wait max 100ms */ |
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do { |
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/*
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* Since we can not rely on finish bit, use 1ms delay to get |
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* temperature. From RM, 17us is enough to get data, but |
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* to gurantee to get the data, delay 100ms here. |
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*/ |
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reg = readl(&ccm_anatop->tempsense1); |
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tmp = (reg & TEMPMON_HW_ANADIG_TEMPSENSE1_TEMP_VALUE_MASK) |
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>> TEMPMON_HW_ANADIG_TEMPSENSE1_TEMP_VALUE_SHIFT; |
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} while (get_timer(0) < (start + 100)); |
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writel(TEMPMON_HW_ANADIG_TEMPSENSE1_FINISHED_MASK, &ccm_anatop->tempsense1_clr); |
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/* power down anatop thermal sensor */ |
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writel(TEMPMON_HW_ANADIG_TEMPSENSE1_POWER_DOWN_MASK, &ccm_anatop->tempsense1_set); |
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writel(PMU_REF_REFTOP_SELFBIASOFF_MASK, &ccm_anatop->ref_clr); |
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/* Single point */ |
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temperature = tmp - (te1 - raw_25c); |
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return temperature; |
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} |
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#endif |
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int imx_thermal_get_temp(struct udevice *dev, int *temp) |
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{ |
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struct thermal_data *priv = dev_get_priv(dev); |
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int cpu_tmp = 0; |
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if (is_soc_type(MXC_SOC_MX6)) |
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cpu_tmp = read_cpu_temperature_mx6(dev); |
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cpu_tmp = read_cpu_temperature(dev); |
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while (cpu_tmp >= priv->critical) { |
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printf("CPU Temperature (%dC) too close to max (%dC)", |
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cpu_tmp, priv->maxc); |
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puts(" waiting...\n"); |
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udelay(5000000); |
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if (is_soc_type(MXC_SOC_MX6)) |
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cpu_tmp = read_cpu_temperature_mx6(dev); |
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cpu_tmp = read_cpu_temperature(dev); |
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} |
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*temp = cpu_tmp; |
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@ -162,9 +232,17 @@ static int imx_thermal_probe(struct udevice *dev) |
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if (is_soc_type(MXC_SOC_MX6)) { |
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/* Check for valid fuse */ |
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if (fuse == 0 || fuse == ~0) { |
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printf("CPU: Thermal invalid data, fuse: 0x%x\n", fuse); |
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printf("CPU: Thermal invalid data, fuse: 0x%x\n", |
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fuse); |
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return -EPERM; |
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} |
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} else if (is_soc_type(MXC_SOC_MX7)) { |
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/* No Calibration data in FUSE? */ |
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if ((fuse & 0x3ffff) == 0) |
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return -EPERM; |
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/* We do not support 105C TE2 */ |
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if (((fuse & 0x1c0000) >> 18) == 0x6) |
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return -EPERM; |
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} |
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/* set critical cooling temp */ |
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