[PATCH RFC 1/2] thermal: qcom: tsens-v1: Add support for MSM8994 TSENS

From: Konrad Dybcio
Date: Tue Feb 09 2021 - 18:26:45 EST

MSM8994, despite being heavily based on MSM8974, uses the
1.2 version of TSENS. Also, 8994 being 8994, it has a custom
way of calculating the slope.

Also tested on 8976 (by a person who didn't want to be named)
to make sure the 11->16 max_sensors changes didn't break anything.

Signed-off-by: Konrad Dybcio <konrad.dybcio@xxxxxxxxxxxxxx>
---
.../bindings/thermal/qcom-tsens.yaml | 1 +
drivers/thermal/qcom/tsens-v1.c | 291 +++++++++++++++++-
drivers/thermal/qcom/tsens.c | 3 +
drivers/thermal/qcom/tsens.h | 2 +-
4 files changed, 284 insertions(+), 13 deletions(-)

diff --git a/Documentation/devicetree/bindings/thermal/qcom-tsens.yaml b/Documentation/devicetree/bindings/thermal/qcom-tsens.yaml
index 95462e071ab4..f194e914a62e 100644
--- a/Documentation/devicetree/bindings/thermal/qcom-tsens.yaml
+++ b/Documentation/devicetree/bindings/thermal/qcom-tsens.yaml
@@ -31,6 +31,7 @@ properties:
items:
- enum:
- qcom,msm8976-tsens
+ - qcom,msm8994-tsens
- qcom,qcs404-tsens
- const: qcom,tsens-v1

diff --git a/drivers/thermal/qcom/tsens-v1.c b/drivers/thermal/qcom/tsens-v1.c
index 3c19a3800c6d..2127b6edd1ae 100644
--- a/drivers/thermal/qcom/tsens-v1.c
+++ b/drivers/thermal/qcom/tsens-v1.c
@@ -142,6 +142,99 @@
#define CAL_SEL_MASK 7
#define CAL_SEL_SHIFT 0

+/* eeprom layout data for 8994 */
+#define MSM8994_BASE0_MASK 0x3ff
+#define MSM8994_BASE1_MASK 0xffc00
+#define MSM8994_BASE0_SHIFT 0
+#define MSM8994_BASE1_SHIFT 10
+
+#define MSM8994_S0_MASK 0xf00000
+#define MSM8994_S1_MASK 0xf000000
+#define MSM8994_S2_MASK 0xf0000000
+#define MSM8994_S3_MASK 0xf
+#define MSM8994_S4_MASK 0xf0
+#define MSM8994_S5_MASK 0xf00
+#define MSM8994_S6_MASK 0xf000
+#define MSM8994_S7_MASK 0xf0000
+#define MSM8994_S8_MASK 0xf00000
+#define MSM8994_S9_MASK 0xf000000
+#define MSM8994_S10_MASK 0xf0000000
+#define MSM8994_S11_MASK 0xf
+#define MSM8994_S12_MASK 0xf0
+#define MSM8994_S13_MASK 0xf00
+#define MSM8994_S14_MASK 0xf000
+#define MSM8994_S15_MASK 0xf0000
+
+#define MSM8994_S0_SHIFT 20
+#define MSM8994_S1_SHIFT 24
+#define MSM8994_S2_SHIFT 28
+#define MSM8994_S3_SHIFT 0
+#define MSM8994_S4_SHIFT 4
+#define MSM8994_S5_SHIFT 8
+#define MSM8994_S6_SHIFT 12
+#define MSM8994_S7_SHIFT 16
+#define MSM8994_S8_SHIFT 20
+#define MSM8994_S9_SHIFT 24
+#define MSM8994_S10_SHIFT 28
+#define MSM8994_S11_SHIFT 0
+#define MSM8994_S12_SHIFT 4
+#define MSM8994_S13_SHIFT 8
+#define MSM8994_S14_SHIFT 12
+#define MSM8994_S15_SHIFT 16
+
+#define MSM8994_CAL_SEL_MASK 0x700000
+#define MSM8994_CAL_SEL_SHIFT 20
+
+#define MSM8994_BASE0_REDUN_MASK 0x7fe00000
+#define MSM8994_BASE1_BIT0_REDUN_MASK 0x80000000
+#define MSM8994_BASE1_BIT1_9_REDUN_MASK 0x1ff
+#define MSM8994_BASE0_REDUN_SHIFT 21
+#define MSM8994_BASE1_BIT0_REDUN_SHIFT_COMPUTE 31
+
+#define MSM8994_S0_REDUN_MASK 0x1e00
+#define MSM8994_S1_REDUN_MASK 0x1e000
+#define MSM8994_S2_REDUN_MASK 0x1e0000
+#define MSM8994_S3_REDUN_MASK 0x1e00000
+#define MSM8994_S4_REDUN_MASK 0x1e000000
+#define MSM8994_S5_REDUN_MASK_BIT0_2 0xe0000000
+#define MSM8994_S5_REDUN_MASK_BIT3 0x800000
+#define MSM8994_S6_REDUN_MASK 0xf000000
+#define MSM8994_S7_REDUN_MASK 0xf0000000
+#define MSM8994_S8_REDUN_MASK 0xf
+#define MSM8994_S9_REDUN_MASK 0xf0
+#define MSM8994_S10_REDUN_MASK 0xf00
+#define MSM8994_S11_REDUN_MASK 0xf000
+#define MSM8994_S12_REDUN_MASK 0xf0000
+#define MSM8994_S13_REDUN_MASK 0xf00000
+#define MSM8994_S14_REDUN_MASK 0xf000000
+#define MSM8994_S15_REDUN_MASK 0xf0000000
+
+#define MSM8994_S0_REDUN_SHIFT 9
+#define MSM8994_S1_REDUN_SHIFT 13
+#define MSM8994_S2_REDUN_SHIFT 17
+#define MSM8994_S3_REDUN_SHIFT 21
+#define MSM8994_S4_REDUN_SHIFT 25
+#define MSM8994_S5_REDUN_SHIFT_BIT0_2 29
+#define MSM8994_S5_REDUN_SHIFT_BIT3 23
+#define MSM8994_S6_REDUN_SHIFT 24
+#define MSM8994_S7_REDUN_SHIFT 28
+#define MSM8994_S8_REDUN_SHIFT 0
+#define MSM8994_S9_REDUN_SHIFT 4
+#define MSM8994_S10_REDUN_SHIFT 8
+#define MSM8994_S11_REDUN_SHIFT 12
+#define MSM8994_S12_REDUN_SHIFT 16
+#define MSM8994_S13_REDUN_SHIFT 20
+#define MSM8994_S14_REDUN_SHIFT 24
+#define MSM8994_S15_REDUN_SHIFT 28
+
+#define MSM8994_REDUN_SEL_MASK 0x7
+#define MSM8994_CAL_SEL_REDUN_MASK 0xe0000000
+#define MSM8994_CAL_SEL_REDUN_SHIFT 29
+
+#define BKP_SEL 0x3
+#define BKP_REDUN_SEL 0xe0000000
+#define BKP_REDUN_SHIFT 29
+
static void compute_intercept_slope_8976(struct tsens_priv *priv,
u32 *p1, u32 *p2, u32 mode)
{
@@ -166,6 +259,37 @@ static void compute_intercept_slope_8976(struct tsens_priv *priv,
}
}

+static void compute_intercept_slope_8994(struct tsens_priv *priv,
+ u32 *base0, u32 *base1, u32 *p, u32 mode)
+{
+ int adc_code_of_tempx, i, num, den;
+
+ for (i = 0; i < priv->num_sensors; i++) {
+ dev_dbg(priv->dev,
+ "%s: sensor%d - data_point1:%#x data_point2:%#x\n",
+ __func__, i, base0[i], base1[i]);
+
+ priv->sensor[i].slope = SLOPE_DEFAULT;
+ if (mode == TWO_PT_CALIB) {
+ /*
+ * slope (m) = adc_code2 - adc_code1 (y2 - y1)/
+ * temp_120_degc - temp_30_degc (x2 - x1)
+ */
+ num = base1[i] - base0[i];
+ num *= SLOPE_FACTOR;
+ den = CAL_DEGC_PT2 - CAL_DEGC_PT1;
+ priv->sensor[i].slope = num / den;
+ }
+
+ adc_code_of_tempx = base0[i] + p[i];
+
+ priv->sensor[i].offset = (adc_code_of_tempx * SLOPE_FACTOR) -
+ (CAL_DEGC_PT1 * priv->sensor[i].slope);
+ dev_dbg(priv->dev, "%s: offset:%d\n", __func__,
+ priv->sensor[i].offset);
+ }
+}
+
static int calibrate_v1(struct tsens_priv *priv)
{
u32 base0 = 0, base1 = 0;
@@ -297,14 +421,143 @@ static int calibrate_8976(struct tsens_priv *priv)
return 0;
}

-/* v1.x: msm8956,8976,qcs404,405 */
+static int calibrate_8994(struct tsens_priv *priv)
+{
+ int base0[16] = { 0 }, base1[16] = { 0 }, i;
+ u32 p[16];
+ int mode = 0;
+ u32 *calib0, *calib1, *calib2, *calib_mode, *calib_rsel;
+ u32 calib_redun_sel;
+
+ /* 0x40d0-0x40dc */
+ calib0 = (u32 *)qfprom_read(priv->dev, "calib");
+ if (IS_ERR(calib0))
+ return PTR_ERR(calib0);
+
+ dev_dbg(priv->dev, "%s: calib0: [0] = %i, [1] = %i, [2] = %i\n",
+ __func__, calib0[0], calib0[1], calib0[2]);
+
+ /* 0x41c0-0x41c8 */
+ calib1 = (u32 *)qfprom_read(priv->dev, "calib_redun1_2");
+ if (IS_ERR(calib1))
+ return PTR_ERR(calib1);
+
+ dev_dbg(priv->dev, "%s: calib1: [0] = %i, [1] = %i\n",
+ __func__, calib1[0], calib1[1]);
+
+ /* 0x41cc-0x41d0 */
+ calib2 = (u32 *)qfprom_read(priv->dev, "calib_redun3");
+ if (IS_ERR(calib2))
+ return PTR_ERR(calib2);
+
+ dev_dbg(priv->dev, "%s: calib2: [0] = %i\n", __func__, calib2[0]);
+
+ /* 0x4440-0x4448 */
+ calib_mode = (u32 *)qfprom_read(priv->dev, "calib_redun4_5");
+ if (IS_ERR(calib_mode))
+ return PTR_ERR(calib_mode);
+
+ dev_dbg(priv->dev, "%s: calib_mode: [0] = %i, [1] = %i\n",
+ __func__, calib1[0], calib1[1]);
+
+ /* 0x4464-0x4468 */
+ calib_rsel = (u32 *)qfprom_read(priv->dev, "calib_rsel");
+ if (IS_ERR(calib_mode))
+ return PTR_ERR(calib_mode);
+
+ dev_dbg(priv->dev, "%s: calib_rsel: [0] = %i\n", __func__, calib_rsel[0]);
+
+ calib_redun_sel = calib_rsel[0] & MSM8994_CAL_SEL_REDUN_MASK;
+ calib_redun_sel >>= MSM8994_CAL_SEL_REDUN_SHIFT;
+
+ if (calib_redun_sel == BKP_SEL) {
+ dev_dbg(priv->dev, "%s: Calibrating in REDUN mode, calib_redun_sel = %i",
+ __func__, calib_redun_sel);
+ mode = calib_mode[1] & MSM8994_REDUN_SEL_MASK;
+
+ if (mode == TWO_PT_CALIB) {
+ dev_dbg(priv->dev, "%s: REDUN TWO_PT mode, mode = %i", __func__, mode);
+ base0[0] = (calib1[0] & MSM8994_BASE0_REDUN_MASK) >> MSM8994_BASE0_REDUN_SHIFT;
+ base1[0] = (calib1[0] & MSM8994_BASE1_BIT0_REDUN_MASK) >> MSM8994_BASE1_BIT0_REDUN_SHIFT_COMPUTE;
+ base1[0] |= calib1[1] & MSM8994_BASE1_BIT1_9_REDUN_MASK;
+ p[0] = (calib1[1] & MSM8994_S0_REDUN_MASK) >> MSM8994_S0_REDUN_SHIFT;
+ p[1] = (calib1[1] & MSM8994_S1_REDUN_MASK) >> MSM8994_S1_REDUN_SHIFT;
+ p[2] = (calib1[1] & MSM8994_S2_REDUN_MASK) >> MSM8994_S2_REDUN_SHIFT;
+ p[3] = (calib1[1] & MSM8994_S3_REDUN_MASK) >> MSM8994_S3_REDUN_SHIFT;
+ p[4] = (calib1[1] & MSM8994_S4_REDUN_MASK) >> MSM8994_S4_REDUN_SHIFT;
+ p[5] = (calib1[1] & MSM8994_S5_REDUN_MASK_BIT0_2) >> MSM8994_S5_REDUN_SHIFT_BIT0_2;
+ p[5] |= (calib2[0] & MSM8994_S5_REDUN_MASK_BIT3) >> MSM8994_S5_REDUN_SHIFT_BIT3;
+ p[6] = (calib2[0] & MSM8994_S6_REDUN_MASK) >> MSM8994_S6_REDUN_SHIFT;
+ p[7] = (calib2[0] & MSM8994_S7_REDUN_MASK) >> MSM8994_S7_REDUN_SHIFT;
+ p[8] = (calib2[0] & MSM8994_S8_REDUN_MASK) >> MSM8994_S8_REDUN_SHIFT;
+ p[9] = (calib2[0] & MSM8994_S9_REDUN_MASK) >> MSM8994_S9_REDUN_SHIFT;
+ p[10] = (calib2[0] & MSM8994_S10_REDUN_MASK) >> MSM8994_S10_REDUN_SHIFT;
+ p[11] = (calib2[0] & MSM8994_S11_REDUN_MASK) >> MSM8994_S11_REDUN_SHIFT;
+ p[12] = (calib2[0] & MSM8994_S12_REDUN_MASK) >> MSM8994_S12_REDUN_SHIFT;
+ p[13] = (calib2[0] & MSM8994_S13_REDUN_MASK) >> MSM8994_S13_REDUN_SHIFT;
+ p[14] = (calib2[0] & MSM8994_S14_REDUN_MASK) >> MSM8994_S14_REDUN_SHIFT;
+ p[15] = (calib2[0] & MSM8994_S15_REDUN_MASK) >> MSM8994_S15_REDUN_SHIFT;
+ } else {
+ dev_dbg(priv->dev, "%s: REDUN NON-TWO_PT mode, mode = %i",
+ __func__, mode);
+ for (i = 0; i < 16; i++)
+ p[i] = 532;
+ }
+ } else {
+ dev_dbg(priv->dev, "%s: Calibrating in NOT-REDUN mode, calib_redun_sel = %i",
+ __func__, calib_redun_sel);
+ mode = (calib0[2] & MSM8994_CAL_SEL_MASK) >> MSM8994_CAL_SEL_SHIFT;
+
+ if (mode == TWO_PT_CALIB) {
+ dev_dbg(priv->dev, "%s: NOT-REDUN TWO_PT mode, mode = %i", __func__, mode);
+ base0[0] = (calib0[0] & MSM8994_BASE0_MASK) >> MSM8994_BASE0_SHIFT;
+ base1[0] = (calib0[0] & MSM8994_BASE1_MASK) >> MSM8994_BASE1_SHIFT;
+ p[0] = (calib0[0] & MSM8994_S0_MASK) >> MSM8994_S0_SHIFT;
+ p[1] = (calib0[0] & MSM8994_S1_MASK) >> MSM8994_S1_SHIFT;
+ p[2] = (calib0[1] & MSM8994_S2_MASK) >> MSM8994_S2_SHIFT;
+ p[3] = (calib0[1] & MSM8994_S3_MASK) >> MSM8994_S3_SHIFT;
+ p[4] = (calib0[1] & MSM8994_S4_MASK) >> MSM8994_S4_SHIFT;
+ p[5] = (calib0[1] & MSM8994_S5_MASK) >> MSM8994_S5_SHIFT;
+ p[6] = (calib0[1] & MSM8994_S6_MASK) >> MSM8994_S6_SHIFT;
+ p[7] = (calib0[1] & MSM8994_S7_MASK) >> MSM8994_S7_SHIFT;
+ p[8] = (calib0[1] & MSM8994_S8_MASK) >> MSM8994_S8_SHIFT;
+ p[9] = (calib0[1] & MSM8994_S9_MASK) >> MSM8994_S9_SHIFT;
+ p[10] = (calib0[1] & MSM8994_S10_MASK) >> MSM8994_S10_SHIFT;
+ p[11] = (calib0[2] & MSM8994_S11_MASK) >> MSM8994_S11_SHIFT;
+ p[12] = (calib0[2] & MSM8994_S12_MASK) >> MSM8994_S12_SHIFT;
+ p[13] = (calib0[2] & MSM8994_S13_MASK) >> MSM8994_S13_SHIFT;
+ p[14] = (calib0[2] & MSM8994_S14_MASK) >> MSM8994_S14_SHIFT;
+ p[15] = (calib0[2] & MSM8994_S15_MASK) >> MSM8994_S15_SHIFT;
+ } else {
+ dev_dbg(priv->dev, "%s: NOT-REDUN NON-TWO_PT mode, mode = %i", __func__, mode);
+ for (i = 0; i < 16; i++)
+ p[i] = 532;
+ }
+ }
+
+ /* 8994 does the slope calc a bit differently than others. */
+ for (i = 1; i < 16; i++) {
+ base0[i] = base0[0];
+ base1[i] = base1[0];
+ }
+
+ compute_intercept_slope_8994(priv, base0, base1, p, mode);
+ kfree(calib0);
+ kfree(calib1);
+ kfree(calib2);
+ kfree(calib_mode);
+
+ return 0;
+}
+
+/* v1.x: msm8956/8976, msm8994 (v1.2), qcs404/qcs405 */

static struct tsens_features tsens_v1_feat = {
.ver_major = VER_1_X,
.crit_int = 0,
.adc = 1,
.srot_split = 1,
- .max_sensors = 11,
+ .max_sensors = 16,
};

static const struct reg_field tsens_v1_regfields[MAX_REGFIELDS] = {
@@ -323,12 +576,12 @@ static const struct reg_field tsens_v1_regfields[MAX_REGFIELDS] = {
[INT_EN] = REG_FIELD(TM_INT_EN_OFF, 0, 0),

/* UPPER/LOWER TEMPERATURE THRESHOLDS */
- REG_FIELD_FOR_EACH_SENSOR11(LOW_THRESH, TM_Sn_UPPER_LOWER_STATUS_CTRL_OFF, 0, 9),
- REG_FIELD_FOR_EACH_SENSOR11(UP_THRESH, TM_Sn_UPPER_LOWER_STATUS_CTRL_OFF, 10, 19),
+ REG_FIELD_FOR_EACH_SENSOR16(LOW_THRESH, TM_Sn_UPPER_LOWER_STATUS_CTRL_OFF, 0, 9),
+ REG_FIELD_FOR_EACH_SENSOR16(UP_THRESH, TM_Sn_UPPER_LOWER_STATUS_CTRL_OFF, 10, 19),

/* UPPER/LOWER INTERRUPTS [CLEAR/STATUS] */
- REG_FIELD_FOR_EACH_SENSOR11(LOW_INT_CLEAR, TM_Sn_UPPER_LOWER_STATUS_CTRL_OFF, 20, 20),
- REG_FIELD_FOR_EACH_SENSOR11(UP_INT_CLEAR, TM_Sn_UPPER_LOWER_STATUS_CTRL_OFF, 21, 21),
+ REG_FIELD_FOR_EACH_SENSOR16(LOW_INT_CLEAR, TM_Sn_UPPER_LOWER_STATUS_CTRL_OFF, 20, 20),
+ REG_FIELD_FOR_EACH_SENSOR16(UP_INT_CLEAR, TM_Sn_UPPER_LOWER_STATUS_CTRL_OFF, 21, 21),
[LOW_INT_STATUS_0] = REG_FIELD(TM_HIGH_LOW_INT_STATUS_OFF, 0, 0),
[LOW_INT_STATUS_1] = REG_FIELD(TM_HIGH_LOW_INT_STATUS_OFF, 1, 1),
[LOW_INT_STATUS_2] = REG_FIELD(TM_HIGH_LOW_INT_STATUS_OFF, 2, 2),
@@ -349,14 +602,14 @@ static const struct reg_field tsens_v1_regfields[MAX_REGFIELDS] = {
/* NO CRITICAL INTERRUPT SUPPORT on v1 */

/* Sn_STATUS */
- REG_FIELD_FOR_EACH_SENSOR11(LAST_TEMP, TM_Sn_STATUS_OFF, 0, 9),
- REG_FIELD_FOR_EACH_SENSOR11(VALID, TM_Sn_STATUS_OFF, 14, 14),
+ REG_FIELD_FOR_EACH_SENSOR16(LAST_TEMP, TM_Sn_STATUS_OFF, 0, 9),
+ REG_FIELD_FOR_EACH_SENSOR16(VALID, TM_Sn_STATUS_OFF, 14, 14),
/* xxx_STATUS bits: 1 == threshold violated */
- REG_FIELD_FOR_EACH_SENSOR11(MIN_STATUS, TM_Sn_STATUS_OFF, 10, 10),
- REG_FIELD_FOR_EACH_SENSOR11(LOWER_STATUS, TM_Sn_STATUS_OFF, 11, 11),
- REG_FIELD_FOR_EACH_SENSOR11(UPPER_STATUS, TM_Sn_STATUS_OFF, 12, 12),
+ REG_FIELD_FOR_EACH_SENSOR16(MIN_STATUS, TM_Sn_STATUS_OFF, 10, 10),
+ REG_FIELD_FOR_EACH_SENSOR16(LOWER_STATUS, TM_Sn_STATUS_OFF, 11, 11),
+ REG_FIELD_FOR_EACH_SENSOR16(UPPER_STATUS, TM_Sn_STATUS_OFF, 12, 12),
/* No CRITICAL field on v1.x */
- REG_FIELD_FOR_EACH_SENSOR11(MAX_STATUS, TM_Sn_STATUS_OFF, 13, 13),
+ REG_FIELD_FOR_EACH_SENSOR16(MAX_STATUS, TM_Sn_STATUS_OFF, 13, 13),

/* TRDY: 1=ready, 0=in progress */
[TRDY] = REG_FIELD(TM_TRDY_OFF, 0, 0),
@@ -388,3 +641,17 @@ struct tsens_plat_data data_8976 = {
.feat = &tsens_v1_feat,
.fields = tsens_v1_regfields,
};
+
+static const struct tsens_ops ops_8994 = {
+ .init = init_common,
+ .calibrate = calibrate_8994,
+ .get_temp = get_temp_tsens_valid,
+};
+
+struct tsens_plat_data data_8994 = {
+ .num_sensors = 16,
+ .ops = &ops_8994,
+ .hw_ids = (unsigned int []){ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 },
+ .feat = &tsens_v1_feat,
+ .fields = tsens_v1_regfields,
+};
diff --git a/drivers/thermal/qcom/tsens.c b/drivers/thermal/qcom/tsens.c
index d8ce3a687b80..96d17afe3460 100644
--- a/drivers/thermal/qcom/tsens.c
+++ b/drivers/thermal/qcom/tsens.c
@@ -903,6 +903,9 @@ static const struct of_device_id tsens_table[] = {
}, {
.compatible = "qcom,msm8974-tsens",
.data = &data_8974,
+ }, {
+ .compatible = "qcom,msm8994-tsens",
+ .data = &data_8994,
}, {
.compatible = "qcom,msm8976-tsens",
.data = &data_8976,
diff --git a/drivers/thermal/qcom/tsens.h b/drivers/thermal/qcom/tsens.h
index f40b625f897e..dfbff7f6442c 100644
--- a/drivers/thermal/qcom/tsens.h
+++ b/drivers/thermal/qcom/tsens.h
@@ -588,7 +588,7 @@ extern struct tsens_plat_data data_8960;
extern struct tsens_plat_data data_8916, data_8939, data_8974;

/* TSENS v1 targets */
-extern struct tsens_plat_data data_tsens_v1, data_8976;
+extern struct tsens_plat_data data_tsens_v1, data_8976, data_8994;

/* TSENS v2 targets */
extern struct tsens_plat_data data_8996, data_tsens_v2;
--
2.30.0