On 7/10/2023 8:32 PM, Dmitry Baryshkov wrote:
On Mon, 10 Jul 2023 at 16:22, Praveenkumar I <quic_ipkumar@xxxxxxxxxxx> wrote:On 7/10/2023 4:49 PM, Dmitry Baryshkov wrote:On 10/07/2023 13:37, Praveenkumar I wrote:SoCs without RPM have to enable sensors and calibrate from the kernel. Though TSENS IP supports 16 sensors, not all are used. So added sensors_to_en in tsens data help enable the relevant sensors. Added new calibration function for V2 as the tsens.c calib function only supports V1. Signed-off-by: Praveenkumar I <quic_ipkumar@xxxxxxxxxxx> --- drivers/thermal/qcom/tsens-v2.c | 116 ++++++++++++++++++++++++++++++++ drivers/thermal/qcom/tsens.c | 37 +++++++++- drivers/thermal/qcom/tsens.h | 56 +++++++++++++++ 3 files changed, 208 insertions(+), 1 deletion(-) diff --git a/drivers/thermal/qcom/tsens-v2.c b/drivers/thermal/qcom/tsens-v2.c index 29a61d2d6ca3..db48b1d95348 100644 --- a/drivers/thermal/qcom/tsens-v2.c +++ b/drivers/thermal/qcom/tsens-v2.c @@ -6,11 +6,20 @@ #include <linux/bitops.h> #include <linux/regmap.h> +#include <linux/nvmem-consumer.h> #include "tsens.h" /* ----- SROT ------ */ #define SROT_HW_VER_OFF 0x0000 #define SROT_CTRL_OFF 0x0004 +#define SROT_MEASURE_PERIOD 0x0008 +#define SROT_Sn_CONVERSION 0x0060 +#define V2_SHIFT_DEFAULT 0x0003 +#define V2_SLOPE_DEFAULT 0x0cd0 +#define V2_CZERO_DEFAULT 0x016a +#define ONE_PT_SLOPE 0x0cd0 +#define TWO_PT_SHIFTED_GAIN 921600 +#define ONE_PT_CZERO_CONST 94 /* ----- TM ------ */ #define TM_INT_EN_OFF 0x0004 @@ -59,6 +68,16 @@ static const struct reg_field tsens_v2_regfields[MAX_REGFIELDS] = { /* CTRL_OFF */ [TSENS_EN] = REG_FIELD(SROT_CTRL_OFF, 0, 0), [TSENS_SW_RST] = REG_FIELD(SROT_CTRL_OFF, 1, 1), + [SENSOR_EN] = REG_FIELD(SROT_CTRL_OFF, 3, 18), + [CODE_OR_TEMP] = REG_FIELD(SROT_CTRL_OFF, 21, 21), + + /* MAIN_MEASURE_PERIOD */ + [MAIN_MEASURE_PERIOD] = REG_FIELD(SROT_MEASURE_PERIOD, 0, 7), + + /* Sn Conversion */ + REG_FIELD_FOR_EACH_SENSOR16(SHIFT, SROT_Sn_CONVERSION, 23, 24), + REG_FIELD_FOR_EACH_SENSOR16(SLOPE, SROT_Sn_CONVERSION, 10, 22), + REG_FIELD_FOR_EACH_SENSOR16(CZERO, SROT_Sn_CONVERSION, 0, 9), /* ----- TM ------ */ /* INTERRUPT ENABLE */ @@ -104,6 +123,103 @@ static const struct reg_field tsens_v2_regfields[MAX_REGFIELDS] = { [TRDY] = REG_FIELD(TM_TRDY_OFF, 0, 0), }; +static int tsens_v2_calibration(struct tsens_priv *priv) +{ + struct device *dev = priv->dev; + u32 mode, base0, base1; + u32 slope, czero; + char name[15]; + int i, j, ret; + + if (priv->num_sensors > MAX_SENSORS) + return -EINVAL; + + ret = nvmem_cell_read_variable_le_u32(priv->dev, "mode", &mode); + if (ret == -ENOENT) + dev_warn(priv->dev, "Calibration data not present in DT\n"); + if (ret < 0) + return ret; + + dev_dbg(priv->dev, "calibration mode is %d\n", mode); + + ret = nvmem_cell_read_variable_le_u32(priv->dev, "base0", &base0); + if (ret < 0) + return ret; + + ret = nvmem_cell_read_variable_le_u32(priv->dev, "base1", &base1); + if (ret < 0) + return ret; + + /* Read offset values and allocate SHIFT, SLOPE & CZERO regmap for enabled sensors */ + for (i = 0; i < priv->num_sensors; i++) { + if (!(priv->sensors_to_en & (0x1 << i))) + continue; + + ret = snprintf(name, sizeof(name), "s%d_offset", priv->sensor[i].hw_id); + if (ret < 0) + return ret; + + ret = nvmem_cell_read_variable_le_u32(priv->dev, name, &priv->sensor[i].offset); + if (ret) + return ret; + + for (j = SHIFT_0; j <= CZERO_0; j++) { + int idx = (i * 3) + j; + + priv->rf[idx] = devm_regmap_field_alloc(dev, priv->srot_map, + priv->fields[idx]); + if (IS_ERR(priv->rf[idx])) + return PTR_ERR(priv->rf[idx]);I think, allocating data structures for 48 regfields, which are written just once, to be an overkill.Can we change it to single field for each sensor. For example, CONVERSION_0 instead of SHIFT_0, SLOPE_0 and CZERO_0? This way it will be max 16 regfields.If you move writing of the registers to the loop, you won't need regfields. You can just call regmap_update_bits. The point is that you don't have to allocate a one-time instance.
Sure, will update in next patch.
+ } + } + + /* Based on calib mode, program SHIFT, SLOPE and CZERO for enabled sensors */ + switch (mode) { + case TWO_PT_CALIB: + slope = (TWO_PT_SHIFTED_GAIN / (base1 - base0)); + + for (i = 0; i < priv->num_sensors; i++) { + if (!(priv->sensors_to_en & (0x1 << i))) + continue; + + int idx = i * 3; + + czero = (base0 + priv->sensor[i].offset - ((base1 - base0) / 3)); + regmap_field_write(priv->rf[SHIFT_0 + idx], V2_SHIFT_DEFAULT); + regmap_field_write(priv->rf[SLOPE_0 + idx], slope); + regmap_field_write(priv->rf[CZERO_0 + idx], czero); + } + fallthrough; + case ONE_PT_CALIB2: + for (i = 0; i < priv->num_sensors; i++) { + if (!(priv->sensors_to_en & (0x1 << i))) + continue; + + int idx = i * 3; + + czero = base0 + priv->sensor[i].offset - ONE_PT_CZERO_CONST; + regmap_field_write(priv->rf[SHIFT_0 + idx], V2_SHIFT_DEFAULT); + regmap_field_write(priv->rf[SLOPE_0 + idx], ONE_PT_SLOPE); + regmap_field_write(priv->rf[CZERO_0 + idx], czero); + } + break; + default: + dev_dbg(priv->dev, "calibrationless mode\n"); + for (i = 0; i < priv->num_sensors; i++) { + if (!(priv->sensors_to_en & (0x1 << i))) + continue; + + int idx = i * 3; + + regmap_field_write(priv->rf[SHIFT_0 + idx], V2_SHIFT_DEFAULT); + regmap_field_write(priv->rf[SLOPE_0 + idx], V2_SLOPE_DEFAULT); + regmap_field_write(priv->rf[CZERO_0 + idx], V2_CZERO_DEFAULT); + } + }This code iterates over the sensors field several times. Please consider extracting a function that handles all setup for a single sensor, then calling it in a loop (I should probably do the same for tsens-v0/v1 too).Sure. After reading the mode0, base0 and base1 from QFPROM, we can call a function in a loop to setup the calibration for each sensor.+ + return 0; +} + static const struct tsens_ops ops_generic_v2 = { .init = init_common, .get_temp = get_temp_tsens_valid, diff --git a/drivers/thermal/qcom/tsens.c b/drivers/thermal/qcom/tsens.c index 98c356acfe98..169690355dad 100644 --- a/drivers/thermal/qcom/tsens.c +++ b/drivers/thermal/qcom/tsens.c @@ -974,7 +974,7 @@ int __init init_common(struct tsens_priv *priv) ret = regmap_field_read(priv->rf[TSENS_EN], &enabled); if (ret) goto err_put_device; - if (!enabled) { + if (!enabled && !priv->sensors_to_en) { dev_err(dev, "%s: device not enabled\n", __func__); ret = -ENODEV; goto err_put_device; @@ -1006,6 +1006,40 @@ int __init init_common(struct tsens_priv *priv) goto err_put_device; } + /* Do TSENS initialization if required */ + if (priv->sensors_to_en) {Maybe it would be better to explicitly add VER_2_X_NO_RPM and check it here?Sure, will add a separate version macro.+ priv->rf[CODE_OR_TEMP] = devm_regmap_field_alloc(dev, priv->srot_map, + priv->fields[CODE_OR_TEMP]); + if (IS_ERR(priv->rf[CODE_OR_TEMP])) { + ret = PTR_ERR(priv->rf[CODE_OR_TEMP]); + goto err_put_device; + } + + priv->rf[MAIN_MEASURE_PERIOD] = + devm_regmap_field_alloc(dev, priv->srot_map, + priv->fields[MAIN_MEASURE_PERIOD]); + if (IS_ERR(priv->rf[MAIN_MEASURE_PERIOD])) { + ret = PTR_ERR(priv->rf[MAIN_MEASURE_PERIOD]); + goto err_put_device; + } + + regmap_field_write(priv->rf[TSENS_SW_RST], 0x1); + + /* Update measure period to 2ms */ + regmap_field_write(priv->rf[MAIN_MEASURE_PERIOD], 0x1); + + /* Enable available sensors */ + regmap_field_write(priv->rf[SENSOR_EN], priv->sensors_to_en); + + /* Real temperature format */ + regmap_field_write(priv->rf[CODE_OR_TEMP], 0x1); + + regmap_field_write(priv->rf[TSENS_SW_RST], 0x0); + + /* Enable TSENS */ + regmap_field_write(priv->rf[TSENS_EN], 0x1); + } + /* This loop might need changes if enum regfield_ids is reordered */ for (j = LAST_TEMP_0; j <= UP_THRESH_15; j += 16) { for (i = 0; i < priv->feat->max_sensors; i++) { @@ -1282,6 +1316,7 @@ static int tsens_probe(struct platform_device *pdev) priv->dev = dev; priv->num_sensors = num_sensors; + priv->sensors_to_en = data->sensors_to_en; priv->ops = data->ops; for (i = 0; i < priv->num_sensors; i++) { if (data->hw_ids) diff --git a/drivers/thermal/qcom/tsens.h b/drivers/thermal/qcom/tsens.h index 2805de1c6827..f8897bc8944e 100644 --- a/drivers/thermal/qcom/tsens.h +++ b/drivers/thermal/qcom/tsens.h @@ -168,6 +168,58 @@ enum regfield_ids { TSENS_SW_RST, SENSOR_EN, CODE_OR_TEMP, + /* MEASURE_PERIOD */ + MAIN_MEASURE_PERIOD, + + /* Sn_CONVERSION */ + SHIFT_0, + SLOPE_0, + CZERO_0, + SHIFT_1, + SLOPE_1, + CZERO_1, + SHIFT_2, + SLOPE_2, + CZERO_2, + SHIFT_3, + SLOPE_3, + CZERO_3, + SHIFT_4, + SLOPE_4, + CZERO_4, + SHIFT_5, + SLOPE_5, + CZERO_5, + SHIFT_6, + SLOPE_6, + CZERO_6, + SHIFT_7, + SLOPE_7, + CZERO_7, + SHIFT_8, + SLOPE_8, + CZERO_8, + SHIFT_9, + SLOPE_9, + CZERO_9, + SHIFT_10, + SLOPE_10, + CZERO_10, + SHIFT_11, + SLOPE_11, + CZERO_11, + SHIFT_12, + SLOPE_12, + CZERO_12, + SHIFT_13, + SLOPE_13, + CZERO_13, + SHIFT_14, + SLOPE_14, + CZERO_14, + SHIFT_15, + SLOPE_15, + CZERO_15, /* ----- TM ------ */ /* TRDY */ @@ -524,6 +576,7 @@ struct tsens_features { /** * struct tsens_plat_data - tsens compile-time platform data * @num_sensors: Number of sensors supported by platform + * @sensors_to_en: Sensors to be enabled. Each bit represent a sensor * @ops: operations the tsens instance supports * @hw_ids: Subset of sensors ids supported by platform, if not the first n * @feat: features of the IP @@ -531,6 +584,7 @@ struct tsens_features { */ struct tsens_plat_data { const u32 num_sensors; + const u16 sensors_to_en;There is already a similar field, hw_ids. Can it be used instead?Yes, it can be used. I missed to check this hw_ids. Will change the num_sensors to 5 and use the hw_ids.const struct tsens_ops *ops; unsigned int *hw_ids; struct tsens_features *feat; @@ -551,6 +605,7 @@ struct tsens_context { * struct tsens_priv - private data for each instance of the tsens IP * @dev: pointer to struct device * @num_sensors: number of sensors enabled on this device + * @sensors_to_en: sensors to be enabled. Each bit represents a sensor * @tm_map: pointer to TM register address space * @srot_map: pointer to SROT register address space * @tm_offset: deal with old device trees that don't address TM and SROT @@ -569,6 +624,7 @@ struct tsens_context { struct tsens_priv { struct device *dev; u32 num_sensors; + u16 sensors_to_en; struct regmap *tm_map; struct regmap *srot_map; u32 tm_offset;-- Thanks, Praveenkumar
