From: Ninad Malwade Date: Tue, 8 Nov 2022 04:45:08 +0000 (+0800) Subject: hwmon: (ina3221) Fix shunt sum critical calculation X-Git-Tag: v5.10.158~79 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=dddfc03f044b1acb10477dad42d51522368b1fbc;p=thirdparty%2Fkernel%2Fstable.git hwmon: (ina3221) Fix shunt sum critical calculation [ Upstream commit b8d27d2ce8dfc207e4b67b929a86f2be76fbc6ef ] The shunt sum critical limit register value should be left shifted by one bit as its LSB-0 is a reserved bit. Fixes: 2057bdfb7184 ("hwmon: (ina3221) Add summation feature support") Signed-off-by: Ninad Malwade Reviewed-by: Thierry Reding Link: https://lore.kernel.org/r/20221108044508.23463-1-nmalwade@nvidia.com Signed-off-by: Guenter Roeck Signed-off-by: Sasha Levin --- diff --git a/drivers/hwmon/ina3221.c b/drivers/hwmon/ina3221.c index ad11cbddc3a7b..d3c98115042b5 100644 --- a/drivers/hwmon/ina3221.c +++ b/drivers/hwmon/ina3221.c @@ -230,7 +230,7 @@ static int ina3221_read_value(struct ina3221_data *ina, unsigned int reg, * Shunt Voltage Sum register has 14-bit value with 1-bit shift * Other Shunt Voltage registers have 12 bits with 3-bit shift */ - if (reg == INA3221_SHUNT_SUM) + if (reg == INA3221_SHUNT_SUM || reg == INA3221_CRIT_SUM) *val = sign_extend32(regval >> 1, 14); else *val = sign_extend32(regval >> 3, 12); @@ -465,7 +465,7 @@ static int ina3221_write_curr(struct device *dev, u32 attr, * SHUNT_SUM: (1 / 40uV) << 1 = 1 / 20uV * SHUNT[1-3]: (1 / 40uV) << 3 = 1 / 5uV */ - if (reg == INA3221_SHUNT_SUM) + if (reg == INA3221_SHUNT_SUM || reg == INA3221_CRIT_SUM) regval = DIV_ROUND_CLOSEST(voltage_uv, 20) & 0xfffe; else regval = DIV_ROUND_CLOSEST(voltage_uv, 5) & 0xfff8;