Add support for the thermal sensor found in H616 SoC
which slightly resembles the H6 thermal sensor
controller with few changes like 4 sensors.
Signed-off-by: Martin Botka <martin.botka@xxxxxxxxxxxxxx>
---
drivers/thermal/sun8i_thermal.c | 115 ++++++++++++++++++++++++++++++++++++++++
1 file changed, 115 insertions(+)
diff --git a/drivers/thermal/sun8i_thermal.c b/drivers/thermal/sun8i_thermal.c
index 195f3c5d0b38..9d73e4313ad8 100644
--- a/drivers/thermal/sun8i_thermal.c
+++ b/drivers/thermal/sun8i_thermal.c
@@ -108,6 +108,12 @@ static int sun50i_h5_calc_temp(struct ths_device *tmdev,
return -1590 * reg / 10 + 276000;
}
+static int sun50i_h616_calc_temp(struct ths_device *tmdev,
+ int id, int reg)
+{
+ return (reg + tmdev->chip->offset) * tmdev->chip->scale;
+}
+
static int sun8i_ths_get_temp(struct thermal_zone_device *tz, int *temp)
{
struct tsensor *s = thermal_zone_device_priv(tz);
@@ -278,6 +284,64 @@ static int sun50i_h6_ths_calibrate(struct ths_device *tmdev,
return 0;
}
+static int sun50i_h616_ths_calibrate(struct ths_device *tmdev,
+ u16 *caldata, int callen)
+{
+ struct device *dev = tmdev->dev;
+ int i, ft_temp;
+
+ if (!caldata[0])
+ return -EINVAL;
+
+ /*
+ * h616 efuse THS calibration data layout:
+ *
+ * 0 11 16 27 32 43 48 57
+ * +----------+-----------+-----------+-----------+
+ * | temp | |sensor0| |sensor1| |sensor2| |
+ * +----------+-----------+-----------+-----------+
+ * ^ ^ ^
+ * | | |
+ * | | sensor3[11:8]
+ * | sensor3[7:4]
+ * sensor3[3:0]
+ *
+ * The calibration data on the H616 is the ambient temperature and
+ * sensor values that are filled during the factory test stage.
+ *
+ * The unit of stored FT temperature is 0.1 degreee celusis.
+ */
+ ft_temp = caldata[0] & FT_TEMP_MASK;
+
+ for (i = 0; i < tmdev->chip->sensor_num; i++) {
+ int delta, cdata, offset, reg;
+
+ if (i == 3)
+ reg = (caldata[1] >> 12)
+ | (caldata[2] >> 12 << 4)
+ | (caldata[3] >> 12 << 8);
+ else
+ reg = (int)caldata[i + 1] & TEMP_CALIB_MASK;
+
+ delta = (ft_temp * 100 - tmdev->chip->calc_temp(tmdev, i, reg))
+ / tmdev->chip->scale;
+ cdata = CALIBRATE_DEFAULT - delta;
+ if (cdata & ~TEMP_CALIB_MASK) {
+ dev_warn(dev, "sensor%d is not calibrated.\n", i);
+
+ continue;
+ }
+
+ offset = (i % 2) * 16;
+ regmap_update_bits(tmdev->regmap,
+ SUN50I_H6_THS_TEMP_CALIB + (i / 2 * 4),
+ 0xfff << offset,
+ cdata << offset);
+ }
+
+ return 0;
+}
+
static int sun8i_ths_calibrate(struct ths_device *tmdev)
{
struct nvmem_cell *calcell;
@@ -453,6 +517,43 @@ static int sun50i_h6_thermal_init(struct ths_device *tmdev)
return 0;
}
+static int sun50i_h616_thermal_init(struct ths_device *tmdev)
+{
+ int val;
+
+ /*
+ * T_acq = 20us
+ * clkin = 24MHz
+ *
+ * x = T_acq * clkin - 1
+ * = 479
+ */
+ regmap_write(tmdev->regmap, SUN50I_THS_CTRL0,
+ SUN8I_THS_CTRL0_T_ACQ0(47) | SUN8I_THS_CTRL2_T_ACQ1(479));
+ /* average over 4 samples */
+ regmap_write(tmdev->regmap, SUN50I_H6_THS_MFC,
+ SUN50I_THS_FILTER_EN |
+ SUN50I_THS_FILTER_TYPE(1));
+ /*
+ * clkin = 24MHz
+ * filter_samples = 4
+ * period = 0.25s
+ *
+ * x = period * clkin / 4096 / filter_samples - 1
+ * = 365
+ */
+ regmap_write(tmdev->regmap, SUN50I_H6_THS_PC,
+ SUN50I_H6_THS_PC_TEMP_PERIOD(365));
+ /* enable sensor */
+ val = GENMASK(tmdev->chip->sensor_num - 1, 0);
+ regmap_write(tmdev->regmap, SUN50I_H6_THS_ENABLE, val);
+ /* thermal data interrupt enable */
+ val = GENMASK(tmdev->chip->sensor_num - 1, 0);
+ regmap_write(tmdev->regmap, SUN50I_H6_THS_DIC, val);
+
+ return 0;
+}
+
static int sun8i_ths_register(struct ths_device *tmdev)
{
int i;
@@ -608,6 +709,19 @@ static const struct ths_thermal_chip sun50i_h6_ths = {
.calc_temp = sun8i_ths_calc_temp,
};
+static const struct ths_thermal_chip sun50i_h616_ths = {
+ .sensor_num = 4,
+ .has_bus_clk_reset = true,
+ .ft_deviation = 8000,
+ .offset = -3255,
+ .scale = -81,
+ .temp_data_base = SUN50I_H6_THS_TEMP_DATA,
+ .calibrate = sun50i_h616_ths_calibrate,
+ .init = sun50i_h616_thermal_init,
+ .irq_ack = sun50i_h6_irq_ack,
+ .calc_temp = sun50i_h616_calc_temp,
+};
+
static const struct of_device_id of_ths_match[] = {
{ .compatible = "allwinner,sun8i-a83t-ths", .data = &sun8i_a83t_ths },
{ .compatible = "allwinner,sun8i-h3-ths", .data = &sun8i_h3_ths },
@@ -616,6 +730,7 @@ static const struct of_device_id of_ths_match[] = {
{ .compatible = "allwinner,sun50i-a100-ths", .data = &sun50i_a100_ths },
{ .compatible = "allwinner,sun50i-h5-ths", .data = &sun50i_h5_ths },
{ .compatible = "allwinner,sun50i-h6-ths", .data = &sun50i_h6_ths },
+ { .compatible = "allwinner,sun50i-h616-ths", .data = &sun50i_h616_ths },
{ /* sentinel */ },
};
MODULE_DEVICE_TABLE(of, of_ths_match);
--
2.41.0
