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iio: adc: qcom-spmi-adc5: Update ratios for SMB_* channels for ADC7

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As per the hardware recommendation, add a ratio of 41/40 (i.e.
numerator 40 and denominator 41 based on how it's used in our
calculations) for the ADC channels that use SMB_TEMP pin because
of the voltage divider circuit with a 1 K and 40 K in parallel.

IIN_FB channel should be using the same ratio as that of IIN_SMB
before. Hence, add a separate scaling factor for it.

Change-Id: I4c3d76a068edf7c964a71c5082da54b115e7eb04
Signed-off-by: Subbaraman Narayanamurthy <subbaram@codeaurora.org>
This commit is contained in:
Subbaraman Narayanamurthy 2021-07-14 19:10:20 -07:00
parent 292420b6a5
commit 97d4d1b7f4
1 changed files with 8 additions and 5 deletions
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13
drivers/iio/adc/qcom-spmi-adc5.c
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@ -166,9 +166,12 @@ static const struct vadc_prescale_ratio adc5_prescale_ratios[] = {
{.num = 10, .den = 81},
{.num = 1, .den = 10},
{.num = 1, .den = 16},
{.num = 40, .den = 41}, /* PM7_SMB_TEMP */
/* Prescale ratios for current channels below */
{.num = 32, .den = 100}, /* IIN_FB, IIN_SMB */
{.num = 16, .den = 100}, /* ICHG_SMB */
{.num = 1280, .den = 4100}, /* IIN_SMB_new */
{.num = 640, .den = 4100}, /* ICHG_SMB_new */
{.num = 1000, .den = 305185}, /* ICHG_FB */
{.num = 1000, .den = 610370}, /* ICHG_FB_2X */
};
@ -686,17 +689,17 @@ static const struct adc5_channels adc7_chans_pmic[ADC5_MAX_CHANNEL] = {
SCALE_HW_CALIB_DEFAULT)
[ADC7_USB_IN_V_16] = ADC5_CHAN_VOLT("usb_in_v_div_16", 8,
SCALE_HW_CALIB_DEFAULT)
[ADC7_AMUX_THM3] = ADC5_CHAN_TEMP("smb_temp", 0,
[ADC7_AMUX_THM3] = ADC5_CHAN_TEMP("smb_temp", 9,
SCALE_HW_CALIB_PM7_SMB_TEMP)
[ADC7_CHG_TEMP] = ADC5_CHAN_TEMP("chg_temp", 0,
SCALE_HW_CALIB_PM7_CHG_TEMP)
[ADC7_IIN_FB] = ADC5_CHAN_CUR("iin_fb", 9,
[ADC7_IIN_FB] = ADC5_CHAN_CUR("iin_fb", 10,
SCALE_HW_CALIB_CUR)
[ADC7_IIN_SMB] = ADC5_CHAN_CUR("iin_smb", 9,
[ADC7_IIN_SMB] = ADC5_CHAN_CUR("iin_smb", 12,
SCALE_HW_CALIB_CUR)
[ADC7_ICHG_SMB] = ADC5_CHAN_CUR("ichg_smb", 10,
[ADC7_ICHG_SMB] = ADC5_CHAN_CUR("ichg_smb", 13,
SCALE_HW_CALIB_CUR)
[ADC7_ICHG_FB] = ADC5_CHAN_CUR("ichg_fb", 11,
[ADC7_ICHG_FB] = ADC5_CHAN_CUR("ichg_fb", 14,
SCALE_HW_CALIB_CUR_RAW)
[ADC7_DIE_TEMP] = ADC5_CHAN_TEMP("die_temp", 0,
SCALE_HW_CALIB_PMIC_THERM_PM7)