On Sat, Oct 5, 2019 at 4:11 PM <kholk11@xxxxxxxxx> wrote:
>
> From: AngeloGioacchino Del Regno <kholk11@xxxxxxxxx>
>
> Add support for reading calibrated value from thermistors in
> MSM8956, MSM8976 and their APQ variants.
>
> Signed-off-by: AngeloGioacchino Del Regno <kholk11@xxxxxxxxx>
Reviewed-by: Amit Kucheria <amit.kucheria@xxxxxxxxxx>
> ---
> drivers/thermal/qcom/tsens-v1.c | 171 +++++++++++++++++++++++++++++++-
> drivers/thermal/qcom/tsens.c | 3 +
> drivers/thermal/qcom/tsens.h | 2 +-
> 3 files changed, 174 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/thermal/qcom/tsens-v1.c b/drivers/thermal/qcom/tsens-v1.c
> index 10b595d4f619..3c85a698123a 100644
> --- a/drivers/thermal/qcom/tsens-v1.c
> +++ b/drivers/thermal/qcom/tsens-v1.c
> @@ -6,6 +6,7 @@
> #include <linux/bitops.h>
> #include <linux/regmap.h>
> #include <linux/delay.h>
> +#include <linux/slab.h>
> #include "tsens.h"
>
> /* ----- SROT ------ */
> @@ -18,6 +19,68 @@
> #define TM_Sn_STATUS_OFF 0x0044
> #define TM_TRDY_OFF 0x0084
>
> +/* eeprom layout data for msm8956/76 (v1) */
> +#define MSM8976_BASE0_MASK 0xff
> +#define MSM8976_BASE1_MASK 0xff
> +#define MSM8976_BASE1_SHIFT 8
> +
> +#define MSM8976_S0_P1_MASK 0x3f00
> +#define MSM8976_S1_P1_MASK 0x3f00000
> +#define MSM8976_S2_P1_MASK 0x3f
> +#define MSM8976_S3_P1_MASK 0x3f000
> +#define MSM8976_S4_P1_MASK 0x3f00
> +#define MSM8976_S5_P1_MASK 0x3f00000
> +#define MSM8976_S6_P1_MASK 0x3f
> +#define MSM8976_S7_P1_MASK 0x3f000
> +#define MSM8976_S8_P1_MASK 0x1f8
> +#define MSM8976_S9_P1_MASK 0x1f8000
> +#define MSM8976_S10_P1_MASK 0xf8000000
> +#define MSM8976_S10_P1_MASK_1 0x1
> +
> +#define MSM8976_S0_P2_MASK 0xfc000
> +#define MSM8976_S1_P2_MASK 0xfc000000
> +#define MSM8976_S2_P2_MASK 0xfc0
> +#define MSM8976_S3_P2_MASK 0xfc0000
> +#define MSM8976_S4_P2_MASK 0xfc000
> +#define MSM8976_S5_P2_MASK 0xfc000000
> +#define MSM8976_S6_P2_MASK 0xfc0
> +#define MSM8976_S7_P2_MASK 0xfc0000
> +#define MSM8976_S8_P2_MASK 0x7e00
> +#define MSM8976_S9_P2_MASK 0x7e00000
> +#define MSM8976_S10_P2_MASK 0x7e
> +
> +#define MSM8976_S0_P1_SHIFT 8
> +#define MSM8976_S1_P1_SHIFT 20
> +#define MSM8976_S2_P1_SHIFT 0
> +#define MSM8976_S3_P1_SHIFT 12
> +#define MSM8976_S4_P1_SHIFT 8
> +#define MSM8976_S5_P1_SHIFT 20
> +#define MSM8976_S6_P1_SHIFT 0
> +#define MSM8976_S7_P1_SHIFT 12
> +#define MSM8976_S8_P1_SHIFT 3
> +#define MSM8976_S9_P1_SHIFT 15
> +#define MSM8976_S10_P1_SHIFT 27
> +#define MSM8976_S10_P1_SHIFT_1 0
> +
> +#define MSM8976_S0_P2_SHIFT 14
> +#define MSM8976_S1_P2_SHIFT 26
> +#define MSM8976_S2_P2_SHIFT 6
> +#define MSM8976_S3_P2_SHIFT 18
> +#define MSM8976_S4_P2_SHIFT 14
> +#define MSM8976_S5_P2_SHIFT 26
> +#define MSM8976_S6_P2_SHIFT 6
> +#define MSM8976_S7_P2_SHIFT 18
> +#define MSM8976_S8_P2_SHIFT 9
> +#define MSM8976_S9_P2_SHIFT 21
> +#define MSM8976_S10_P2_SHIFT 1
> +
> +#define MSM8976_CAL_SEL_MASK 0x3
> +
> +#define MSM8976_CAL_DEGC_PT1 30
> +#define MSM8976_CAL_DEGC_PT2 120
> +#define MSM8976_SLOPE_FACTOR 1000
> +#define MSM8976_SLOPE_DEFAULT 3200
> +
> /* eeprom layout data for qcs404/405 (v1) */
> #define BASE0_MASK 0x000007f8
> #define BASE1_MASK 0x0007f800
> @@ -77,6 +140,30 @@
> #define CAL_SEL_MASK 7
> #define CAL_SEL_SHIFT 0
>
> +static void compute_intercept_slope_8976(struct tsens_priv *priv,
> + u32 *p1, u32 *p2, u32 mode)
> +{
> + int i;
> +
> + priv->sensor[0].slope = 3313;
> + priv->sensor[1].slope = 3275;
> + priv->sensor[2].slope = 3320;
> + priv->sensor[3].slope = 3246;
> + priv->sensor[4].slope = 3279;
> + priv->sensor[5].slope = 3257;
> + priv->sensor[6].slope = 3234;
> + priv->sensor[7].slope = 3269;
> + priv->sensor[8].slope = 3255;
> + priv->sensor[9].slope = 3239;
> + priv->sensor[10].slope = 3286;
> +
> + for (i = 0; i < priv->num_sensors; i++) {
> + priv->sensor[i].offset = (p1[i] * MSM8976_SLOPE_FACTOR) -
> + (MSM8976_CAL_DEGC_PT1 *
> + priv->sensor[i].slope);
> + }
> +}
> +
> static int calibrate_v1(struct tsens_priv *priv)
> {
> u32 base0 = 0, base1 = 0;
> @@ -142,7 +229,74 @@ static int calibrate_v1(struct tsens_priv *priv)
> return 0;
> }
>
> -/* v1.x: qcs404,405 */
> +static int calibrate_8976(struct tsens_priv *priv)
> +{
> + int base0 = 0, base1 = 0, i;
> + u32 p1[11], p2[11];
> + int mode = 0, tmp = 0;
> + u32 *qfprom_cdata;
> +
> + qfprom_cdata = (u32 *)qfprom_read(priv->dev, "calib");
> + if (IS_ERR(qfprom_cdata)) {
> + kfree(qfprom_cdata);
> + return PTR_ERR(qfprom_cdata);
> + }
> +
> + mode = (qfprom_cdata[4] & MSM8976_CAL_SEL_MASK);
> + dev_dbg(priv->dev, "calibration mode is %d\n", mode);
> +
> + switch (mode) {
> + case TWO_PT_CALIB:
> + base1 = (qfprom_cdata[2] & MSM8976_BASE1_MASK) >> MSM8976_BASE1_SHIFT;
> + p2[0] = (qfprom_cdata[0] & MSM8976_S0_P2_MASK) >> MSM8976_S0_P2_SHIFT;
> + p2[1] = (qfprom_cdata[0] & MSM8976_S1_P2_MASK) >> MSM8976_S1_P2_SHIFT;
> + p2[2] = (qfprom_cdata[1] & MSM8976_S2_P2_MASK) >> MSM8976_S2_P2_SHIFT;
> + p2[3] = (qfprom_cdata[1] & MSM8976_S3_P2_MASK) >> MSM8976_S3_P2_SHIFT;
> + p2[4] = (qfprom_cdata[2] & MSM8976_S4_P2_MASK) >> MSM8976_S4_P2_SHIFT;
> + p2[5] = (qfprom_cdata[2] & MSM8976_S5_P2_MASK) >> MSM8976_S5_P2_SHIFT;
> + p2[6] = (qfprom_cdata[3] & MSM8976_S6_P2_MASK) >> MSM8976_S6_P2_SHIFT;
> + p2[7] = (qfprom_cdata[3] & MSM8976_S7_P2_MASK) >> MSM8976_S7_P2_SHIFT;
> + p2[8] = (qfprom_cdata[4] & MSM8976_S8_P2_MASK) >> MSM8976_S8_P2_SHIFT;
> + p2[9] = (qfprom_cdata[4] & MSM8976_S9_P2_MASK) >> MSM8976_S9_P2_SHIFT;
> + p2[10] = (qfprom_cdata[5] & MSM8976_S10_P2_MASK) >> MSM8976_S10_P2_SHIFT;
> +
> + for (i = 0; i < priv->num_sensors; i++)
> + p2[i] = ((base1 + p2[i]) << 2);
> + /* Fall through */
> + case ONE_PT_CALIB2:
> + base0 = qfprom_cdata[0] & MSM8976_BASE0_MASK;
> + p1[0] = (qfprom_cdata[0] & MSM8976_S0_P1_MASK) >> MSM8976_S0_P1_SHIFT;
> + p1[1] = (qfprom_cdata[0] & MSM8976_S1_P1_MASK) >> MSM8976_S1_P1_SHIFT;
> + p1[2] = (qfprom_cdata[1] & MSM8976_S2_P1_MASK) >> MSM8976_S2_P1_SHIFT;
> + p1[3] = (qfprom_cdata[1] & MSM8976_S3_P1_MASK) >> MSM8976_S3_P1_SHIFT;
> + p1[4] = (qfprom_cdata[2] & MSM8976_S4_P1_MASK) >> MSM8976_S4_P1_SHIFT;
> + p1[5] = (qfprom_cdata[2] & MSM8976_S5_P1_MASK) >> MSM8976_S5_P1_SHIFT;
> + p1[6] = (qfprom_cdata[3] & MSM8976_S6_P1_MASK) >> MSM8976_S6_P1_SHIFT;
> + p1[7] = (qfprom_cdata[3] & MSM8976_S7_P1_MASK) >> MSM8976_S7_P1_SHIFT;
> + p1[8] = (qfprom_cdata[4] & MSM8976_S8_P1_MASK) >> MSM8976_S8_P1_SHIFT;
> + p1[9] = (qfprom_cdata[4] & MSM8976_S9_P1_MASK) >> MSM8976_S9_P1_SHIFT;
> + p1[10] = (qfprom_cdata[4] & MSM8976_S10_P1_MASK) >> MSM8976_S10_P1_SHIFT;
> + tmp = (qfprom_cdata[5] & MSM8976_S10_P1_MASK_1) << MSM8976_S10_P1_SHIFT_1;
> + p1[10] |= tmp;
> +
> + for (i = 0; i < priv->num_sensors; i++)
> + p1[i] = (((base0) + p1[i]) << 2);
> + break;
> + default:
> + for (i = 0; i < priv->num_sensors; i++) {
> + p1[i] = 500;
> + p2[i] = 780;
> + }
> + break;
> + }
> +
> + compute_intercept_slope_8976(priv, p1, p2, mode);
> + kfree(qfprom_cdata);
> +
> + return 0;
> +}
> +
> +/* v1.x: msm8956,8976,qcs404,405 */
>
> static const struct tsens_features tsens_v1_feat = {
> .ver_major = VER_1_X,
> @@ -191,3 +345,18 @@ const struct tsens_plat_data data_tsens_v1 = {
> .feat = &tsens_v1_feat,
> .fields = tsens_v1_regfields,
> };
> +
> +static const struct tsens_ops ops_8976 = {
> + .init = init_common,
> + .calibrate = calibrate_8976,
> + .get_temp = get_temp_tsens_valid,
> +};
> +
> +/* Valid for both MSM8956 and MSM8976. Sensor ID 3 is unused. */
> +const struct tsens_plat_data data_8976 = {
> + .num_sensors = 11,
> + .ops = &ops_8976,
> + .hw_ids = (unsigned int[]){0, 1, 2, 4, 5, 6, 7, 8, 9, 10},
> + .feat = &tsens_v1_feat,
> + .fields = tsens_v1_regfields,
> +};
> diff --git a/drivers/thermal/qcom/tsens.c b/drivers/thermal/qcom/tsens.c
> index 0627d8615c30..24bb05e0eaf8 100644
> --- a/drivers/thermal/qcom/tsens.c
> +++ b/drivers/thermal/qcom/tsens.c
> @@ -60,6 +60,9 @@ static const struct of_device_id tsens_table[] = {
> }, {
> .compatible = "qcom,msm8974-tsens",
> .data = &data_8974,
> + }, {
> + .compatible = "qcom,msm8976-tsens",
> + .data = &data_8976,
> }, {
> .compatible = "qcom,msm8996-tsens",
> .data = &data_8996,
> diff --git a/drivers/thermal/qcom/tsens.h b/drivers/thermal/qcom/tsens.h
> index 2fd94997245b..8efec747bfcb 100644
> --- a/drivers/thermal/qcom/tsens.h
> +++ b/drivers/thermal/qcom/tsens.h
> @@ -323,7 +323,7 @@ extern const struct tsens_plat_data data_8960;
> extern const struct tsens_plat_data data_8916, data_8974;
>
> /* TSENS v1 targets */
> -extern const struct tsens_plat_data data_tsens_v1;
> +extern const struct tsens_plat_data data_tsens_v1, data_8976;
>
> /* TSENS v2 targets */
> extern const struct tsens_plat_data data_8996, data_tsens_v2;
> --
> 2.21.0
>
