openwrt/target/linux/mediatek/patches-5.15/805-thermal-drivers-mediatek-add-support-for-MT7986-and-.patch
Daniel Golle c15e7e2910
mediatek: filogic: consolidate adc '32k' clock
Add dependency to '32k' ADC clock so it is always enabled for thermal
and raw access to ADC values. This allows to remove the patch for the
ADC driver and reduce the patch adding thermal support for MT7986 to
only add the new efuse layout and temperature decoding for V3.

Suggested-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
2022-10-20 20:37:50 +01:00

224 lines
6.7 KiB
Diff

From cd47d86ab09f1f3ec5c86441d4fe95e0cf597c06 Mon Sep 17 00:00:00 2001
From: Daniel Golle <daniel@makrotopia.org>
Date: Tue, 13 Sep 2022 00:56:24 +0100
Subject: [PATCH] thermal/drivers/mediatek: add support for MT7986 and MT7981
Add support for V3 generation thermal found in MT7986 and MT7981 SoCs.
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
---
drivers/thermal/mtk_thermal.c | 202 +++++++++++++++++++++++++++++++++-
1 file changed, 198 insertions(+), 4 deletions(-)
--- a/drivers/thermal/mtk_thermal.c
+++ b/drivers/thermal/mtk_thermal.c
@@ -150,6 +150,21 @@
#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 could be used for MT7981 and MT7986.
+ */
+#define CALIB_BUF0_ADC_GE_V3(x) (((x) >> 0) & 0x3ff)
+#define CALIB_BUF0_ADC_OE_V3(x) (((x) >> 10) & 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 +178,7 @@ enum {
enum mtk_thermal_version {
MTK_THERMAL_V1 = 1,
MTK_THERMAL_V2,
+ MTK_THERMAL_V3,
};
/* MT2701 thermal sensors */
@@ -245,6 +261,27 @@ 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 {
@@ -386,6 +423,14 @@ 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
@@ -549,6 +594,30 @@ 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 - convert a raw ADC value to mcelsius
* @mt: The thermal controller
@@ -603,6 +672,22 @@ 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
@@ -659,9 +744,12 @@ static int mtk_thermal_bank_temperature(
if (mt->conf->version == MTK_THERMAL_V1) {
temp = raw_to_mcelsius_v1(
mt, conf->bank_data[bank->id].sensors[i], raw);
- } else {
+ } else if (mt->conf->version == MTK_THERMAL_V2) {
temp = raw_to_mcelsius_v2(
mt, conf->bank_data[bank->id].sensors[i], raw);
+ } else {
+ temp = raw_to_mcelsius_v3(
+ mt, conf->bank_data[bank->id].sensors[i], raw);
}
/*
@@ -887,6 +975,26 @@ 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_oe = CALIB_BUF0_ADC_OE_V3(buf[0]);
+ 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)
{
@@ -897,6 +1005,7 @@ 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;
@@ -924,8 +1033,10 @@ static int mtk_thermal_get_calibration_d
if (mt->conf->version == MTK_THERMAL_V1)
ret = mtk_thermal_extract_efuse_v1(mt, buf);
- else
+ else if (mt->conf->version == MTK_THERMAL_V2)
ret = mtk_thermal_extract_efuse_v2(mt, buf);
+ else
+ ret = mtk_thermal_extract_efuse_v3(mt, buf);
if (ret) {
dev_info(dev, "Device not calibrated, using default calibration values\n");
@@ -956,6 +1067,10 @@ 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,
}, {
@@ -1070,7 +1185,8 @@ 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_V2 ||
+ mt->conf->version == MTK_THERMAL_V3) {
mtk_thermal_turn_on_buffer(apmixed_base);
mtk_thermal_release_periodic_ts(mt, auxadc_base);
}