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hwmon: qpnp-adc Add support for fsm9900 target

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Add support for thermistor design and mapping
table used on fsm9900 target.

Change-Id: I1c22e6a55ddb5dfcb75b69ec6f807f8c2d6b2eb8
Acked-by: Jim Granitzki <jamesg@qti.qualcomm.com>
Signed-off-by: Venkatesh Yadav Abbarapu <quicvenkat@codeaurora.org>
This commit is contained in:
Venkatesh Yadav Abbarapu 2014-05-19 10:32:21 -07:00
parent 60d7547987
commit 0f45ef107f
3 changed files with 82 additions and 0 deletions
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57
drivers/hwmon/qpnp-adc-common.c
View file

@ -512,6 +512,44 @@ static const struct qpnp_vadc_map_pt adcmap_smb_batt_therm[] = {
{790, 186}
};
/* Voltage to temperature */
static const struct qpnp_vadc_map_pt adcmap_ncp03wf683[] = {
{1742, -40},
{1718, -35},
{1687, -30},
{1647, -25},
{1596, -20},
{1534, -15},
{1459, -10},
{1372, -5},
{1275, 0},
{1169, 5},
{1058, 10},
{945, 15},
{834, 20},
{729, 25},
{630, 30},
{541, 35},
{461, 40},
{392, 45},
{332, 50},
{280, 55},
{236, 60},
{199, 65},
{169, 70},
{142, 75},
{121, 80},
{102, 85},
{87, 90},
{74, 95},
{64, 100},
{55, 105},
{47, 110},
{40, 115},
{35, 120},
{30, 125}
};
static int32_t qpnp_adc_map_voltage_temp(const struct qpnp_vadc_map_pt *pts,
uint32_t tablesize, int32_t input, int64_t *output)
{
@ -965,6 +1003,25 @@ int32_t qpnp_adc_tm_scale_therm_voltage_pu2(struct qpnp_vadc_chip *chip,
}
EXPORT_SYMBOL(qpnp_adc_tm_scale_therm_voltage_pu2);
int32_t qpnp_adc_scale_therm_ncp03(struct qpnp_vadc_chip *chip,
int32_t adc_code,
const struct qpnp_adc_properties *adc_properties,
const struct qpnp_vadc_chan_properties *chan_properties,
struct qpnp_vadc_result *adc_chan_result)
{
int64_t therm_voltage = 0;
therm_voltage = qpnp_adc_scale_ratiometric_calib(adc_code,
adc_properties, chan_properties);
qpnp_adc_map_voltage_temp(adcmap_ncp03wf683,
ARRAY_SIZE(adcmap_ncp03wf683),
therm_voltage, &adc_chan_result->physical);
return 0;
}
EXPORT_SYMBOL(qpnp_adc_scale_therm_ncp03);
int32_t qpnp_adc_scale_batt_id(struct qpnp_vadc_chip *chip,
int32_t adc_code,
const struct qpnp_adc_properties *adc_properties,

1
drivers/hwmon/qpnp-adc-voltage.c
View file

@ -132,6 +132,7 @@ static struct qpnp_vadc_scale_fn vadc_scale_fn[] = {
[SCALE_SMB_BATT_THERM] = {qpnp_adc_scale_smb_batt_therm},
[SCALE_QRD_SKUG_BATT_THERM] = {qpnp_adc_scale_qrd_skug_batt_therm},
[SCALE_QRD_SKUH_BATT_THERM] = {qpnp_adc_scale_qrd_skuh_batt_therm},
[SCALE_NCP_03WF683_THERM] = {qpnp_adc_scale_therm_ncp03},
};
static int32_t qpnp_vadc_read_reg(struct qpnp_vadc_chip *vadc, int16_t reg,

24
include/linux/qpnp/qpnp-adc.h
View file

@ -247,6 +247,7 @@ enum qpnp_adc_scale_fn_type {
SCALE_SMB_BATT_THERM,
SCALE_QRD_SKUG_BATT_THERM,
SCALE_QRD_SKUH_BATT_THERM,
SCALE_NCP_03WF683_THERM,
SCALE_NONE,
};
@ -1292,6 +1293,23 @@ int32_t qpnp_adc_scale_therm_pu2(struct qpnp_vadc_chip *dev, int32_t adc_code,
const struct qpnp_adc_properties *adc_prop,
const struct qpnp_vadc_chan_properties *chan_prop,
struct qpnp_vadc_result *chan_rslt);
/**
* qpnp_adc_scale_therm_ncp03() - Scales the pre-calibrated digital output
* of an ADC to the ADC reference and compensates for the
* gain and offset. Returns the temperature of the therm in degC.
* It uses a mapping table computed for a NCP03WF683.
* @dev: Structure device for qpnp vadc
* @adc_code: pre-calibrated digital ouput of the ADC.
* @adc_prop: adc properties of the pm8xxx adc such as bit resolution,
* reference voltage.
* @chan_prop: individual channel properties to compensate the i/p scaling,
* slope and offset.
* @chan_rslt: physical result to be stored.
*/
int32_t qpnp_adc_scale_therm_ncp03(struct qpnp_vadc_chip *dev, int32_t adc_code,
const struct qpnp_adc_properties *adc_prop,
const struct qpnp_vadc_chan_properties *chan_prop,
struct qpnp_vadc_result *chan_rslt);
/**
* qpnp_get_vadc() - Clients need to register with the vadc using the
* corresponding device instance it wants to read the channels
@ -1575,6 +1593,12 @@ static inline int32_t qpnp_adc_scale_therm_pu2(struct qpnp_vadc_chip *vadc,
const struct qpnp_vadc_chan_properties *chan_prop,
struct qpnp_vadc_result *chan_rslt)
{ return -ENXIO; }
static inline int32_t qpnp_adc_scale_therm_ncp03(struct qpnp_vadc_chip *vadc,
int32_t adc_code,
const struct qpnp_adc_properties *adc_prop,
const struct qpnp_vadc_chan_properties *chan_prop,
struct qpnp_vadc_result *chan_rslt)
{ return -ENXIO; }
static inline struct qpnp_vadc_chip *qpnp_get_vadc(struct device *dev,
const char *name)
{ return ERR_PTR(-ENXIO); }