--- /dev/null
+From aec1d89dccc7cba04fdb3e52dfda328f3302ba17 Mon Sep 17 00:00:00 2001
+From: Daniel Golle <daniel@makrotopia.org>
+Date: Wed, 18 Jan 2023 15:40:58 +0000
+Subject: [PATCH 04/42] thermal/drivers/mtk: Add support for MT7986 and MT7981
+
+Add support for V3 generation thermal found in MT7986 and MT7981 SoCs.
+Brings code to assign values from efuse as well as new function to
+convert raw temperature to millidegree celsius, as found in MediaTek's
+SDK sources (but cleaned up and de-duplicated)
+
+[1]: https://git01.mediatek.com/plugins/gitiles/openwrt/feeds/mtk-openwrt-feeds/+/baf36c7eef477aae1f8f2653b6c29e2caf48475b
+
+Signed-off-by: Daniel Golle <daniel@makrotopia.org>
+Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
+Link: https://lore.kernel.org/r/2d341fc45266217249586eb4bd3be3ac4ca83a12.1674055882.git.daniel@makrotopia.org
+Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
+---
+ drivers/thermal/mtk_thermal.c | 128 ++++++++++++++++++++++++++++++++--
+ 1 file changed, 124 insertions(+), 4 deletions(-)
+
+--- a/drivers/thermal/mtk_thermal.c
++++ b/drivers/thermal/mtk_thermal.c
+@@ -150,6 +150,20 @@
+ #define CALIB_BUF1_VALID_V2(x) (((x) >> 4) & 0x1)
+ #define CALIB_BUF1_O_SLOPE_SIGN_V2(x) (((x) >> 3) & 0x1)
+
++/*
++ * Layout of the fuses providing the calibration data
++ * These macros can be used for MT7981 and MT7986.
++ */
++#define CALIB_BUF0_ADC_GE_V3(x) (((x) >> 0) & 0x3ff)
++#define CALIB_BUF0_DEGC_CALI_V3(x) (((x) >> 20) & 0x3f)
++#define CALIB_BUF0_O_SLOPE_V3(x) (((x) >> 26) & 0x3f)
++#define CALIB_BUF1_VTS_TS1_V3(x) (((x) >> 0) & 0x1ff)
++#define CALIB_BUF1_VTS_TS2_V3(x) (((x) >> 21) & 0x1ff)
++#define CALIB_BUF1_VTS_TSABB_V3(x) (((x) >> 9) & 0x1ff)
++#define CALIB_BUF1_VALID_V3(x) (((x) >> 18) & 0x1)
++#define CALIB_BUF1_O_SLOPE_SIGN_V3(x) (((x) >> 19) & 0x1)
++#define CALIB_BUF1_ID_V3(x) (((x) >> 20) & 0x1)
++
+ enum {
+ VTS1,
+ VTS2,
+@@ -163,6 +177,7 @@ enum {
+ enum mtk_thermal_version {
+ MTK_THERMAL_V1 = 1,
+ MTK_THERMAL_V2,
++ MTK_THERMAL_V3,
+ };
+
+ /* MT2701 thermal sensors */
+@@ -245,6 +260,27 @@ enum mtk_thermal_version {
+ /* The calibration coefficient of sensor */
+ #define MT8183_CALIBRATION 153
+
++/* AUXADC channel 11 is used for the temperature sensors */
++#define MT7986_TEMP_AUXADC_CHANNEL 11
++
++/* The total number of temperature sensors in the MT7986 */
++#define MT7986_NUM_SENSORS 1
++
++/* The number of banks in the MT7986 */
++#define MT7986_NUM_ZONES 1
++
++/* The number of sensing points per bank */
++#define MT7986_NUM_SENSORS_PER_ZONE 1
++
++/* MT7986 thermal sensors */
++#define MT7986_TS1 0
++
++/* The number of controller in the MT7986 */
++#define MT7986_NUM_CONTROLLER 1
++
++/* The calibration coefficient of sensor */
++#define MT7986_CALIBRATION 165
++
+ struct mtk_thermal;
+
+ struct thermal_bank_cfg {
+@@ -388,6 +424,14 @@ static const int mt7622_mux_values[MT762
+ static const int mt7622_vts_index[MT7622_NUM_SENSORS] = { VTS1 };
+ static const int mt7622_tc_offset[MT7622_NUM_CONTROLLER] = { 0x0, };
+
++/* MT7986 thermal sensor data */
++static const int mt7986_bank_data[MT7986_NUM_SENSORS] = { MT7986_TS1, };
++static const int mt7986_msr[MT7986_NUM_SENSORS_PER_ZONE] = { TEMP_MSR0, };
++static const int mt7986_adcpnp[MT7986_NUM_SENSORS_PER_ZONE] = { TEMP_ADCPNP0, };
++static const int mt7986_mux_values[MT7986_NUM_SENSORS] = { 0, };
++static const int mt7986_vts_index[MT7986_NUM_SENSORS] = { VTS1 };
++static const int mt7986_tc_offset[MT7986_NUM_CONTROLLER] = { 0x0, };
++
+ /*
+ * The MT8173 thermal controller has four banks. Each bank can read up to
+ * four temperature sensors simultaneously. The MT8173 has a total of 5
+@@ -551,6 +595,30 @@ static const struct mtk_thermal_data mt8
+ .version = MTK_THERMAL_V1,
+ };
+
++/*
++ * MT7986 uses AUXADC Channel 11 for raw data access.
++ */
++static const struct mtk_thermal_data mt7986_thermal_data = {
++ .auxadc_channel = MT7986_TEMP_AUXADC_CHANNEL,
++ .num_banks = MT7986_NUM_ZONES,
++ .num_sensors = MT7986_NUM_SENSORS,
++ .vts_index = mt7986_vts_index,
++ .cali_val = MT7986_CALIBRATION,
++ .num_controller = MT7986_NUM_CONTROLLER,
++ .controller_offset = mt7986_tc_offset,
++ .need_switch_bank = true,
++ .bank_data = {
++ {
++ .num_sensors = 1,
++ .sensors = mt7986_bank_data,
++ },
++ },
++ .msr = mt7986_msr,
++ .adcpnp = mt7986_adcpnp,
++ .sensor_mux_values = mt7986_mux_values,
++ .version = MTK_THERMAL_V3,
++};
++
+ /**
+ * raw_to_mcelsius_v1 - convert a raw ADC value to mcelsius
+ * @mt: The thermal controller
+@@ -605,6 +673,22 @@ static int raw_to_mcelsius_v2(struct mtk
+ return (format_2 - tmp) * 100;
+ }
+
++static int raw_to_mcelsius_v3(struct mtk_thermal *mt, int sensno, s32 raw)
++{
++ s32 tmp;
++
++ if (raw == 0)
++ return 0;
++
++ raw &= 0xfff;
++ tmp = 100000 * 15 / 16 * 10000;
++ tmp /= 4096 - 512 + mt->adc_ge;
++ tmp /= 1490;
++ tmp *= raw - mt->vts[sensno] - 2900;
++
++ return mt->degc_cali * 500 - tmp;
++}
++
+ /**
+ * mtk_thermal_get_bank - get bank
+ * @bank: The bank
+@@ -885,6 +969,25 @@ static int mtk_thermal_extract_efuse_v2(
+ return 0;
+ }
+
++static int mtk_thermal_extract_efuse_v3(struct mtk_thermal *mt, u32 *buf)
++{
++ if (!CALIB_BUF1_VALID_V3(buf[1]))
++ return -EINVAL;
++
++ mt->adc_ge = CALIB_BUF0_ADC_GE_V3(buf[0]);
++ mt->degc_cali = CALIB_BUF0_DEGC_CALI_V3(buf[0]);
++ mt->o_slope = CALIB_BUF0_O_SLOPE_V3(buf[0]);
++ mt->vts[VTS1] = CALIB_BUF1_VTS_TS1_V3(buf[1]);
++ mt->vts[VTS2] = CALIB_BUF1_VTS_TS2_V3(buf[1]);
++ mt->vts[VTSABB] = CALIB_BUF1_VTS_TSABB_V3(buf[1]);
++ mt->o_slope_sign = CALIB_BUF1_O_SLOPE_SIGN_V3(buf[1]);
++
++ if (CALIB_BUF1_ID_V3(buf[1]) == 0)
++ mt->o_slope = 0;
++
++ return 0;
++}
++
+ static int mtk_thermal_get_calibration_data(struct device *dev,
+ struct mtk_thermal *mt)
+ {
+@@ -895,6 +998,7 @@ static int mtk_thermal_get_calibration_d
+
+ /* Start with default values */
+ mt->adc_ge = 512;
++ mt->adc_oe = 512;
+ for (i = 0; i < mt->conf->num_sensors; i++)
+ mt->vts[i] = 260;
+ mt->degc_cali = 40;
+@@ -920,10 +1024,20 @@ static int mtk_thermal_get_calibration_d
+ goto out;
+ }
+
+- if (mt->conf->version == MTK_THERMAL_V1)
++ switch (mt->conf->version) {
++ case MTK_THERMAL_V1:
+ ret = mtk_thermal_extract_efuse_v1(mt, buf);
+- else
++ break;
++ case MTK_THERMAL_V2:
+ ret = mtk_thermal_extract_efuse_v2(mt, buf);
++ break;
++ case MTK_THERMAL_V3:
++ ret = mtk_thermal_extract_efuse_v3(mt, buf);
++ break;
++ default:
++ ret = -EINVAL;
++ break;
++ }
+
+ if (ret) {
+ dev_info(dev, "Device not calibrated, using default calibration values\n");
+@@ -954,6 +1068,10 @@ static const struct of_device_id mtk_the
+ .data = (void *)&mt7622_thermal_data,
+ },
+ {
++ .compatible = "mediatek,mt7986-thermal",
++ .data = (void *)&mt7986_thermal_data,
++ },
++ {
+ .compatible = "mediatek,mt8183-thermal",
+ .data = (void *)&mt8183_thermal_data,
+ }, {
+@@ -1066,15 +1184,17 @@ static int mtk_thermal_probe(struct plat
+ goto err_disable_clk_auxadc;
+ }
+
+- if (mt->conf->version == MTK_THERMAL_V2) {
++ if (mt->conf->version != MTK_THERMAL_V1) {
+ mtk_thermal_turn_on_buffer(apmixed_base);
+ mtk_thermal_release_periodic_ts(mt, auxadc_base);
+ }
+
+ if (mt->conf->version == MTK_THERMAL_V1)
+ mt->raw_to_mcelsius = raw_to_mcelsius_v1;
+- else
++ else if (mt->conf->version == MTK_THERMAL_V2)
+ mt->raw_to_mcelsius = raw_to_mcelsius_v2;
++ else
++ mt->raw_to_mcelsius = raw_to_mcelsius_v3;
+
+ for (ctrl_id = 0; ctrl_id < mt->conf->num_controller ; ctrl_id++)
+ for (i = 0; i < mt->conf->num_banks; i++)
projects / openwrt / staging / dangole.git / blobdiff