hwmon: (ina3221) Fix shunt sum critical calculation
The shunt sum critical limit register value should be left shifted
by one bit as its LSB-0 is a reserved bit.
Fixes: 2057bdfb71
("hwmon: (ina3221) Add summation feature support")
Signed-off-by: Ninad Malwade <nmalwade@nvidia.com>
Reviewed-by: Thierry Reding <treding@nvidia.com>
Link: https://lore.kernel.org/r/20221108044508.23463-1-nmalwade@nvidia.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
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@ -228,7 +228,7 @@ static int ina3221_read_value(struct ina3221_data *ina, unsigned int reg,
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* Shunt Voltage Sum register has 14-bit value with 1-bit shift
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* Other Shunt Voltage registers have 12 bits with 3-bit shift
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*/
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if (reg == INA3221_SHUNT_SUM)
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if (reg == INA3221_SHUNT_SUM || reg == INA3221_CRIT_SUM)
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*val = sign_extend32(regval >> 1, 14);
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else
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*val = sign_extend32(regval >> 3, 12);
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@ -465,7 +465,7 @@ static int ina3221_write_curr(struct device *dev, u32 attr,
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* SHUNT_SUM: (1 / 40uV) << 1 = 1 / 20uV
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* SHUNT[1-3]: (1 / 40uV) << 3 = 1 / 5uV
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*/
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if (reg == INA3221_SHUNT_SUM)
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if (reg == INA3221_SHUNT_SUM || reg == INA3221_CRIT_SUM)
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regval = DIV_ROUND_CLOSEST(voltage_uv, 20) & 0xfffe;
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else
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regval = DIV_ROUND_CLOSEST(voltage_uv, 5) & 0xfff8;
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