200 lines
6.6 KiB
Diff
200 lines
6.6 KiB
Diff
From git@z Thu Jan 1 00:00:00 1970
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Subject: [PATCH v3 5/6] thermal/drivers/sun8i: Add support for A523 THS0/1
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controllers
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From: Mikhail Kalashnikov <iuncuim@gmail.com>
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Date: Sat, 25 Oct 2025 12:31:28 +0800
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Message-Id: <20251025043129.160454-6-iuncuim@gmail.com>
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MIME-Version: 1.0
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Content-Type: text/plain; charset="utf-8"
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Content-Transfer-Encoding: 7bit
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The A523 processor has two temperature controllers, THS0 and THS1.
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THS0 has only one temperature sensor, which is located in the DRAM.
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THS1 does have 3 sensors:
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ths1_0 - "big" cores
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ths1_1 - "little" cores
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ths1_2 - gpu
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The datasheet mentions a fourth sensor in the NPU, but lacks any registers
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for operation other than calibration registers. The vendor code reads the
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value from ths1_2, but uses separate calibration data, so we get two
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different values from real one.
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Signed-off-by: Mikhail Kalashnikov <iuncuim@gmail.com>
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---
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drivers/thermal/sun8i_thermal.c | 133 ++++++++++++++++++++++++++++++++
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1 file changed, 133 insertions(+)
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--- a/drivers/thermal/sun8i_thermal.c
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+++ b/drivers/thermal/sun8i_thermal.c
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@@ -59,6 +59,12 @@
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#define SUN50I_H6_THS_PC_TEMP_PERIOD(x) ((GENMASK(19, 0) & (x)) << 12)
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#define SUN50I_H6_THS_DATA_IRQ_STS(x) BIT(x)
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+#define SUN55I_A523_DELIMITER 0x7c8
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+#define SUN55I_A523_OFFSET_ABOVE 2736
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+#define SUN55I_A523_OFFSET_BELOW 2825
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+#define SUN55I_A523_SCALE_ABOVE 74
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+#define SUN55I_A523_SCALE_BELOW 65
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+
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struct tsensor {
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struct ths_device *tmdev;
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struct thermal_zone_device *tzd;
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@@ -116,6 +122,15 @@ static int sun50i_h5_calc_temp(struct th
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return -1590 * reg / 10 + 276000;
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}
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+static int sun55i_a523_calc_temp(struct ths_device *tmdev,
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+ int id, int reg)
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+{
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+ if (reg >= SUN55I_A523_DELIMITER)
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+ return SUN55I_A523_SCALE_ABOVE * (SUN55I_A523_OFFSET_ABOVE - reg);
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+ else
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+ return SUN55I_A523_SCALE_BELOW * (SUN55I_A523_OFFSET_BELOW - reg);
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+}
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+
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static int sun8i_ths_get_temp(struct thermal_zone_device *tz, int *temp)
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{
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struct tsensor *s = thermal_zone_device_priv(tz);
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@@ -301,6 +316,97 @@ static int sun50i_h6_ths_calibrate(struc
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return 0;
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}
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+/*
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+ * The A523 nvmem calibration values. The ths1_3 is not used as it
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+ * doesn't have its own sensor and doesn't have any internal switch.
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+ * Instead, the value from the ths1_2 sensor is used, which gives the
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+ * illusion of an independent sensor for NPU and GPU when using
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+ * different calibration values.
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+ *
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+ * efuse layout 0x38-0x3F (caldata[0..3]):
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+ * caldata[0] caldata[1] caldata[2] caldata[3]
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+ * 0 16 24 32 36 48 60 64
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+ * +---------------+---------------+---------------+---------------+
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+ * | | | temp | ths1_0 | ths1_1 | +
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+ * +---------------+---------------+---------------+---------------+
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+ *
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+ * efuse layout 0x44-0x4B (caldata[4..7]):
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+ * caldata[4] caldata[5] caldata[6] caldata[7]
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+ * 0 12 16 24 32 36 48 64
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+ * +---------------+---------------+---------------+---------------+
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+ * | ths1_2 | ths1_3 | ths0 | | +
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+ * +---------------+---------------+---------------+---------------+
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+ */
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+static int sun55i_a523_ths_calibrate(struct ths_device *tmdev,
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+ u16 *caldata, int callen)
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+{
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+ struct device *dev = tmdev->dev;
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+ int i, ft_temp;
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+
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+ if (!caldata[0])
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+ return -EINVAL;
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+
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+ ft_temp = (((caldata[2] << 8) | (caldata[1] >> 8)) & FT_TEMP_MASK) * 100;
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+
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+ for (i = 0; i < tmdev->chip->sensor_num; i++) {
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+ int sensor_reg, sensor_temp, cdata, offset;
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+ /*
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+ * Chips ths0 and ths1 have common parameters for value
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+ * calibration. To separate them we can use the number of
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+ * temperature sensors on each chip.
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+ * For ths0 this value is 1.
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+ */
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+ if (tmdev->chip->sensor_num == 1) {
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+ sensor_reg = ((caldata[5] >> 8) | (caldata[6] << 8)) & TEMP_CALIB_MASK;
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+ } else {
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+ switch (i) {
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+ case 0:
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+ sensor_reg = (caldata[2] >> 4) & TEMP_CALIB_MASK;
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+ break;
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+ case 1:
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+ sensor_reg = caldata[3] & TEMP_CALIB_MASK;
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+ break;
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+ case 2:
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+ sensor_reg = caldata[4] & TEMP_CALIB_MASK;
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+ break;
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+ default:
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+ sensor_reg = 0;
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+ break;
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+ }
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+ }
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+
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+ sensor_temp = tmdev->chip->calc_temp(tmdev, i, sensor_reg);
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+
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+ /*
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+ * Calibration data is CALIBRATE_DEFAULT - (calculated
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+ * temperature from sensor reading at factory temperature
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+ * minus actual factory temperature) * X (scale from
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+ * temperature to register values)
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+ */
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+ cdata = CALIBRATE_DEFAULT -
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+ ((sensor_temp - ft_temp) / SUN55I_A523_SCALE_ABOVE);
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+
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+ if (cdata & ~TEMP_CALIB_MASK) {
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+ /*
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+ * Calibration value more than 12-bit, but calibration
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+ * register is 12-bit. In this case, ths hardware can
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+ * still work without calibration, although the data
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+ * won't be so accurate.
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+ */
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+ dev_warn(dev, "sensor%d is not calibrated.\n", i);
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+ continue;
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+ }
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+
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+ offset = (i % 2) * 16;
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+ regmap_update_bits(tmdev->regmap,
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+ SUN50I_H6_THS_TEMP_CALIB + (i / 2 * 4),
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+ TEMP_CALIB_MASK << offset,
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+ cdata << offset);
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+ }
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+
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+ return 0;
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+}
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+
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static int sun8i_ths_calibrate(struct ths_device *tmdev)
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{
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struct nvmem_cell *calcell = NULL;
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@@ -730,6 +836,31 @@ static const struct ths_thermal_chip sun
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.calc_temp = sun8i_ths_calc_temp,
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};
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+/* The A523 has a shared reset line for both chips */
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+static const struct ths_thermal_chip sun55i_a523_ths0 = {
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+ .sensor_num = 1,
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+ .has_bus_clk_reset = true,
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+ .has_gpadc_clk = true,
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+ .ft_deviation = 5000,
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+ .temp_data_base = SUN50I_H6_THS_TEMP_DATA,
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+ .calibrate = sun55i_a523_ths_calibrate,
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+ .init = sun50i_h6_thermal_init,
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+ .irq_ack = sun50i_h6_irq_ack,
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+ .calc_temp = sun55i_a523_calc_temp,
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+};
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+
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+static const struct ths_thermal_chip sun55i_a523_ths1 = {
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+ .sensor_num = 3,
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+ .has_bus_clk_reset = true,
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+ .has_gpadc_clk = true,
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+ .ft_deviation = 5000,
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+ .temp_data_base = SUN50I_H6_THS_TEMP_DATA,
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+ .calibrate = sun55i_a523_ths_calibrate,
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+ .init = sun50i_h6_thermal_init,
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+ .irq_ack = sun50i_h6_irq_ack,
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+ .calc_temp = sun55i_a523_calc_temp,
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+};
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+
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static const struct of_device_id of_ths_match[] = {
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{ .compatible = "allwinner,sun8i-a83t-ths", .data = &sun8i_a83t_ths },
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{ .compatible = "allwinner,sun8i-h3-ths", .data = &sun8i_h3_ths },
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@@ -740,6 +871,8 @@ static const struct of_device_id of_ths_
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{ .compatible = "allwinner,sun50i-h6-ths", .data = &sun50i_h6_ths },
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{ .compatible = "allwinner,sun20i-d1-ths", .data = &sun20i_d1_ths },
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{ .compatible = "allwinner,sun50i-h616-ths", .data = &sun50i_h616_ths },
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+ { .compatible = "allwinner,sun55i-a523-ths0", .data = &sun55i_a523_ths0 },
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+ { .compatible = "allwinner,sun55i-a523-ths1", .data = &sun55i_a523_ths1 },
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{ /* sentinel */ },
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};
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MODULE_DEVICE_TABLE(of, of_ths_match);
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