include/linux/iio/adc/qcom-vadc-common.h

Source file repositories/reference/linux-study-clean/include/linux/iio/adc/qcom-vadc-common.h

File Facts

System
Linux kernel
Corpus path
include/linux/iio/adc/qcom-vadc-common.h
Extension
.h
Size
5480 bytes
Lines
169
Domain
Core OS
Bucket
Core Kernel Interface
Inferred role
Core OS: implementation source
Status
source implementation candidate

Why This File Exists

Core operating-system implementation surface: boot, tasks, memory, VFS, syscall-facing interfaces, synchronization, credentials, and isolation.

Dependency Surface

Detected Declarations

Annotated Snippet

struct vadc_linear_graph {
	s32 dy;
	s32 dx;
	s32 gnd;
};

/**
 * 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,
	/* private: */
	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 u32_fract *prescale,
		    bool absolute,
		    u16 adc_code, int *result_mdec);

struct qcom_adc5_scale_type {
	int (*scale_fn)(const struct u32_fract *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);

u16 qcom_adc_tm5_temp_volt_scale(unsigned int prescale_ratio,
				 u32 full_scale_code_volt, int temp);

u16 qcom_adc_tm5_gen2_temp_res_scale(int temp);

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);

Annotation

Implementation Notes