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thermal: imx: add imx7d soc thermal support
Add imx7 SoC thermal driver support Signed-off-by: Adrian Alonso <aalonso@freescale.com>
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648539c906
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1 changed files with 84 additions and 6 deletions
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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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