Merge remote-tracking branch 'iio-thermal-5.11-rc1/ib-iio-thermal-5.11-rc1' into testing

3 files changed, 226 insertions, 0 deletions

diff --git a/include/linux/fixp-arith.h b/include/linux/fixp-arith.h
index 8396013785ef..281cb4f83dbe 100644
--- a/include/linux/fixp-arith.h
+++ b/include/linux/fixp-arith.h
@@ -141,4 +141,23 @@ static inline s32 fixp_sin32_rad(u32 radians, u32 twopi)
 #define fixp_cos32_rad(rad, twopi)	\
 	fixp_sin32_rad(rad + twopi / 4, twopi)
 
+/**
+ * fixp_linear_interpolate() - interpolates a value from two known points
+ *
+ * @x0: x value of point 0
+ * @y0: y value of point 0
+ * @x1: x value of point 1
+ * @y1: y value of point 1
+ * @x: the linear interpolant
+ */
+static inline int fixp_linear_interpolate(int x0, int y0, int x1, int y1, int x)
+{
+	if (y0 == y1 || x == x0)
+		return y0;
+	if (x1 == x0 || x == x1)
+		return y1;
+
+	return y0 + ((y1 - y0) * (x - x0) / (x1 - x0));
+}
+
 #endif
diff --git a/include/linux/iio/adc/qcom-vadc-common.h b/include/linux/iio/adc/qcom-vadc-common.h
new file mode 100644
index 000000000000..58216124d89d
--- /dev/null
+++ b/include/linux/iio/adc/qcom-vadc-common.h
@@ -0,0 +1,171 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Code shared between the different Qualcomm PMIC voltage ADCs
+ */
+
+#ifndef QCOM_VADC_COMMON_H
+#define QCOM_VADC_COMMON_H
+
+#include <linux/types.h>
+
+#define VADC_CONV_TIME_MIN_US			2000
+#define VADC_CONV_TIME_MAX_US			2100
+
+/* Min ADC code represents 0V */
+#define VADC_MIN_ADC_CODE			0x6000
+/* Max ADC code represents full-scale range of 1.8V */
+#define VADC_MAX_ADC_CODE			0xa800
+
+#define VADC_ABSOLUTE_RANGE_UV			625000
+#define VADC_RATIOMETRIC_RANGE			1800
+
+#define VADC_DEF_PRESCALING			0 /* 1:1 */
+#define VADC_DEF_DECIMATION			0 /* 512 */
+#define VADC_DEF_HW_SETTLE_TIME			0 /* 0 us */
+#define VADC_DEF_AVG_SAMPLES			0 /* 1 sample */
+#define VADC_DEF_CALIB_TYPE			VADC_CALIB_ABSOLUTE
+
+#define VADC_DECIMATION_MIN			512
+#define VADC_DECIMATION_MAX			4096
+#define ADC5_DEF_VBAT_PRESCALING		1 /* 1:3 */
+#define ADC5_DECIMATION_SHORT			250
+#define ADC5_DECIMATION_MEDIUM			420
+#define ADC5_DECIMATION_LONG			840
+/* Default decimation - 1024 for rev2, 840 for pmic5 */
+#define ADC5_DECIMATION_DEFAULT			2
+#define ADC5_DECIMATION_SAMPLES_MAX		3
+
+#define VADC_HW_SETTLE_DELAY_MAX		10000
+#define VADC_HW_SETTLE_SAMPLES_MAX		16
+#define VADC_AVG_SAMPLES_MAX			512
+#define ADC5_AVG_SAMPLES_MAX			16
+
+#define PMIC5_CHG_TEMP_SCALE_FACTOR		377500
+#define PMIC5_SMB_TEMP_CONSTANT			419400
+#define PMIC5_SMB_TEMP_SCALE_FACTOR		356
+
+#define PMI_CHG_SCALE_1				-138890
+#define PMI_CHG_SCALE_2				391750000000LL
+
+#define VADC5_MAX_CODE				0x7fff
+#define ADC5_FULL_SCALE_CODE			0x70e4
+#define ADC5_USR_DATA_CHECK			0x8000
+
+#define R_PU_100K				100000
+#define RATIO_MAX_ADC7				BIT(14)
+
+/*
+ * VADC_CALIB_ABSOLUTE: uses the 625mV and 1.25V as reference channels.
+ * VADC_CALIB_RATIOMETRIC: uses the reference voltage (1.8V) and GND for
+ * calibration.
+ */
+enum vadc_calibration {
+	VADC_CALIB_ABSOLUTE = 0,
+	VADC_CALIB_RATIOMETRIC
+};
+
+/**
+ * struct vadc_linear_graph - Represent ADC characteristics.
+ * @dy: numerator slope to calculate the gain.
+ * @dx: denominator slope to calculate the gain.
+ * @gnd: A/D word of the ground reference used for the channel.
+ *
+ * Each ADC device has different offset and gain parameters which are
+ * computed to calibrate the device.
+ */
+struct vadc_linear_graph {
+	s32 dy;
+	s32 dx;
+	s32 gnd;
+};
+
+/**
+ * struct vadc_prescale_ratio - Represent scaling ratio for ADC input.
+ * @num: the inverse numerator of the gain applied to the input channel.
+ * @den: the inverse denominator of the gain applied to the input channel.
+ */
+struct vadc_prescale_ratio {
+	u32 num;
+	u32 den;
+};
+
+/**
+ * enum vadc_scale_fn_type - Scaling function to convert ADC code to
+ *				physical scaled units for the channel.
+ * SCALE_DEFAULT: Default scaling to convert raw adc code to voltage (uV).
+ * SCALE_THERM_100K_PULLUP: Returns temperature in millidegC.
+ *				 Uses a mapping table with 100K pullup.
+ * SCALE_PMIC_THERM: Returns result in milli degree's Centigrade.
+ * SCALE_XOTHERM: Returns XO thermistor voltage in millidegC.
+ * SCALE_PMI_CHG_TEMP: Conversion for PMI CHG temp
+ * SCALE_HW_CALIB_DEFAULT: Default scaling to convert raw adc code to
+ *	voltage (uV) with hardware applied offset/slope values to adc code.
+ * SCALE_HW_CALIB_THERM_100K_PULLUP: Returns temperature in millidegC using
+ *	lookup table. The hardware applies offset/slope to adc code.
+ * SCALE_HW_CALIB_XOTHERM: Returns XO thermistor voltage in millidegC using
+ *	100k pullup. The hardware applies offset/slope to adc code.
+ * SCALE_HW_CALIB_THERM_100K_PU_PM7: Returns temperature in millidegC using
+ *	lookup table for PMIC7. The hardware applies offset/slope to adc code.
+ * SCALE_HW_CALIB_PMIC_THERM: Returns result in milli degree's Centigrade.
+ *	The hardware applies offset/slope to adc code.
+ * SCALE_HW_CALIB_PMIC_THERM: Returns result in milli degree's Centigrade.
+ *	The hardware applies offset/slope to adc code. This is for PMIC7.
+ * SCALE_HW_CALIB_PM5_CHG_TEMP: Returns result in millidegrees for PMIC5
+ *	charger temperature.
+ * SCALE_HW_CALIB_PM5_SMB_TEMP: Returns result in millidegrees for PMIC5
+ *	SMB1390 temperature.
+ */
+enum vadc_scale_fn_type {
+	SCALE_DEFAULT = 0,
+	SCALE_THERM_100K_PULLUP,
+	SCALE_PMIC_THERM,
+	SCALE_XOTHERM,
+	SCALE_PMI_CHG_TEMP,
+	SCALE_HW_CALIB_DEFAULT,
+	SCALE_HW_CALIB_THERM_100K_PULLUP,
+	SCALE_HW_CALIB_XOTHERM,
+	SCALE_HW_CALIB_THERM_100K_PU_PM7,
+	SCALE_HW_CALIB_PMIC_THERM,
+	SCALE_HW_CALIB_PMIC_THERM_PM7,
+	SCALE_HW_CALIB_PM5_CHG_TEMP,
+	SCALE_HW_CALIB_PM5_SMB_TEMP,
+	SCALE_HW_CALIB_INVALID,
+};
+
+struct adc5_data {
+	const u32	full_scale_code_volt;
+	const u32	full_scale_code_cur;
+	const struct adc5_channels *adc_chans;
+	const struct iio_info *info;
+	unsigned int	*decimation;
+	unsigned int	*hw_settle_1;
+	unsigned int	*hw_settle_2;
+};
+
+int qcom_vadc_scale(enum vadc_scale_fn_type scaletype,
+		    const struct vadc_linear_graph *calib_graph,
+		    const struct vadc_prescale_ratio *prescale,
+		    bool absolute,
+		    u16 adc_code, int *result_mdec);
+
+struct qcom_adc5_scale_type {
+	int (*scale_fn)(const struct vadc_prescale_ratio *prescale,
+		const struct adc5_data *data, u16 adc_code, int *result);
+};
+
+int qcom_adc5_hw_scale(enum vadc_scale_fn_type scaletype,
+		    unsigned int prescale_ratio,
+		    const struct adc5_data *data,
+		    u16 adc_code, int *result_mdec);
+
+int qcom_adc5_prescaling_from_dt(u32 num, u32 den);
+
+int qcom_adc5_hw_settle_time_from_dt(u32 value, const unsigned int *hw_settle);
+
+int qcom_adc5_avg_samples_from_dt(u32 value);
+
+int qcom_adc5_decimation_from_dt(u32 value, const unsigned int *decimation);
+
+int qcom_vadc_decimation_from_dt(u32 value);
+
+#endif /* QCOM_VADC_COMMON_H */
diff --git a/include/linux/iio/consumer.h b/include/linux/iio/consumer.h
index c4118dcb8e05..0a90ba8fa1bb 100644
--- a/include/linux/iio/consumer.h
+++ b/include/linux/iio/consumer.h
@@ -13,6 +13,7 @@
 struct iio_dev;
 struct iio_chan_spec;
 struct device;
+struct device_node;
 
 /**
  * struct iio_channel - everything needed for a consumer to use a channel
@@ -97,6 +98,41 @@ void iio_channel_release_all(struct iio_channel *chan);
  */
 struct iio_channel *devm_iio_channel_get_all(struct device *dev);
 
+/**
+ * of_iio_channel_get_by_name() - get description of all that is needed to access channel.
+ * @np:			Pointer to consumer device tree node
+ * @consumer_channel:	Unique name to identify the channel on the consumer
+ *			side. This typically describes the channels use within
+ *			the consumer. E.g. 'battery_voltage'
+ */
+#ifdef CONFIG_OF
+struct iio_channel *of_iio_channel_get_by_name(struct device_node *np, const char *name);
+#else
+static inline struct iio_channel *
+of_iio_channel_get_by_name(struct device_node *np, const char *name)
+{
+	return NULL;
+}
+#endif
+
+/**
+ * devm_of_iio_channel_get_by_name() - Resource managed version of of_iio_channel_get_by_name().
+ * @dev:		Pointer to consumer device.
+ * @np:			Pointer to consumer device tree node
+ * @consumer_channel:	Unique name to identify the channel on the consumer
+ *			side. This typically describes the channels use within
+ *			the consumer. E.g. 'battery_voltage'
+ *
+ * Returns a pointer to negative errno if it is not able to get the iio channel
+ * otherwise returns valid pointer for iio channel.
+ *
+ * The allocated iio channel is automatically released when the device is
+ * unbound.
+ */
+struct iio_channel *devm_of_iio_channel_get_by_name(struct device *dev,
+						    struct device_node *np,
+						    const char *consumer_channel);
+
 struct iio_cb_buffer;
 /**
  * iio_channel_get_all_cb() - register callback for triggered capture