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thermal: tsens: Use Calibration offset data from QFPROM

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Current code uses default calibration offset value. Switch
over to using Calibrated offset value read from the QFPROM
to calculate the slope and offset and compensate it with the
temperature read from TSENS.

Change-Id: Ifa839f284acb7d5bba07ff46d986eeebd2132dd2
Signed-off-by: Siddartha Mohanadoss <smohanad@codeaurora.org>
Signed-off-by: David Brown <davidb@codeaurora.org>
This commit is contained in:
Siddartha Mohanadoss 2011-10-18 19:39:49 -07:00 committed by Stephen Boyd
parent 2aa966117d
commit 74c1658ff9
1 changed files with 11 additions and 20 deletions
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31
drivers/thermal/msm8960_tsens.c
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@ -41,13 +41,7 @@ enum tsens_trip_type {
#define TSENS_MAIN_SENSOR 0
#define TSENS_8960_QFPROM_ADDR0 (MSM_QFPROM_BASE + 0x00000404)
#define TSENS_8960_QFPROM_RED_TEMP_SENSOR0_SHIFT 8
#define TSENS_8960_QFPROM_TEMP_SENSOR0_SHIFT 0
#define TSENS_8960_QFPROM_TEMP_SENSOR0_MASK \
(255 << TSENS_QFPROM_TEMP_SENSOR0_SHIFT)
#define TSENS_8960_QFPROM_RED_TEMP_SENSOR0_MASK \
(255 << TSENS_8960_QFPROM_RED_TEMP_SENSOR0_SHIFT)
#define TSENS_8960_QFPROM_SPARE_ADDR0 (MSM_QFPROM_BASE + 0x00000414)
#define TSENS_8960_CONFIG 0x9b
#define TSENS_8960_CONFIG_SHIFT 0
#define TSENS_8960_CONFIG_MASK (0xf << TSENS_8960_CONFIG_SHIFT)
@ -679,30 +673,27 @@ static int tsens_calib_sensors8660(void)
static int tsens_calib_sensors8960(void)
{
uint32_t *main_sensor_addr, sensor_shift, red_sensor_shift;
uint32_t sensor_mask, red_sensor_mask, i;
uint32_t *main_sensor_addr, sensor_shift, *backup_sensor_addr;
uint32_t sensor_mask, i;
for (i = 0; i < tmdev->tsens_num_sensor; i++) {
main_sensor_addr = TSENS_8960_QFPROM_ADDR0 +
(TSENS_8960_QFPROM_SHIFT * (i >> TSENS_MASK1));
sensor_shift = (i & TSENS_MASK1) * TSENS_SENSOR_SHIFT;
red_sensor_shift = sensor_shift + TSENS_RED_SHIFT;
(TSENS_8960_QFPROM_SHIFT *
(i & TSENS_8960_QFPROM_SHIFT >> TSENS_SENSOR0_SHIFT));
sensor_shift = (i % TSENS_8960_QFPROM_SHIFT) * TSENS_RED_SHIFT;
sensor_mask = TSENS_THRESHOLD_MAX_CODE << sensor_shift;
red_sensor_mask = TSENS_THRESHOLD_MAX_CODE <<
red_sensor_shift;
backup_sensor_addr = TSENS_8960_QFPROM_SPARE_ADDR0 +
(TSENS_8960_QFPROM_SHIFT *
(i & TSENS_8960_QFPROM_SHIFT >> TSENS_SENSOR0_SHIFT));
tmdev->sensor[i].calib_data = (readl_relaxed(main_sensor_addr)
& sensor_mask) >> sensor_shift;
tmdev->sensor[i].calib_data_backup =
(readl_relaxed(main_sensor_addr) &
red_sensor_mask) >> red_sensor_shift;
(readl_relaxed(backup_sensor_addr) &
sensor_mask) >> sensor_shift;
if (tmdev->sensor[i].calib_data_backup)
tmdev->sensor[i].calib_data =
tmdev->sensor[i].calib_data_backup;
/* Hardcoded calibration data based on pervious
* chip. Remove once we obtain the data. */
tmdev->sensor[i].calib_data = 91;
if (!tmdev->sensor[i].calib_data) {
pr_err("%s: No temperature sensor:%d data for"
" calibration in QFPROM!\n", __func__, i);