From: Tony Lindgren <tony@xxxxxxxxxxx> [ Upstream commit c68b901ac4fa969db8917b6a9f9b40524a690d20 ] The accumulator sample register is signed 32-bits wide register on droid 4. And only the earlier version of cpcap has a signed 24-bits wide register. We're currently passing it around as unsigned, so let's fix that and use sign_extend32() for the earlier revision. Signed-off-by: Tony Lindgren <tony@xxxxxxxxxxx> Acked-by: Pavel Machek <pavel@xxxxxx> Signed-off-by: Sebastian Reichel <sebastian.reichel@xxxxxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- drivers/power/supply/cpcap-battery.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) diff --git a/drivers/power/supply/cpcap-battery.c b/drivers/power/supply/cpcap-battery.c index 3bae02380bb22..e183a22de7153 100644 --- a/drivers/power/supply/cpcap-battery.c +++ b/drivers/power/supply/cpcap-battery.c @@ -82,7 +82,7 @@ struct cpcap_battery_config { }; struct cpcap_coulomb_counter_data { - s32 sample; /* 24-bits */ + s32 sample; /* 24 or 32 bits */ s32 accumulator; s16 offset; /* 10-bits */ }; @@ -213,7 +213,7 @@ static int cpcap_battery_get_current(struct cpcap_battery_ddata *ddata) * TI or ST coulomb counter in the PMIC. */ static int cpcap_battery_cc_raw_div(struct cpcap_battery_ddata *ddata, - u32 sample, s32 accumulator, + s32 sample, s32 accumulator, s16 offset, u32 divider) { s64 acc; @@ -224,7 +224,6 @@ static int cpcap_battery_cc_raw_div(struct cpcap_battery_ddata *ddata, if (!divider) return 0; - sample &= 0xffffff; /* 24-bits, unsigned */ offset &= 0x7ff; /* 10-bits, signed */ switch (ddata->vendor) { @@ -259,7 +258,7 @@ static int cpcap_battery_cc_raw_div(struct cpcap_battery_ddata *ddata, /* 3600000μAms = 1μAh */ static int cpcap_battery_cc_to_uah(struct cpcap_battery_ddata *ddata, - u32 sample, s32 accumulator, + s32 sample, s32 accumulator, s16 offset) { return cpcap_battery_cc_raw_div(ddata, sample, @@ -268,7 +267,7 @@ static int cpcap_battery_cc_to_uah(struct cpcap_battery_ddata *ddata, } static int cpcap_battery_cc_to_ua(struct cpcap_battery_ddata *ddata, - u32 sample, s32 accumulator, + s32 sample, s32 accumulator, s16 offset) { return cpcap_battery_cc_raw_div(ddata, sample, @@ -312,6 +311,8 @@ cpcap_battery_read_accumulated(struct cpcap_battery_ddata *ddata, /* Sample value CPCAP_REG_CCS1 & 2 */ ccd->sample = (buf[1] & 0x0fff) << 16; ccd->sample |= buf[0]; + if (ddata->vendor == CPCAP_VENDOR_TI) + ccd->sample = sign_extend32(24, ccd->sample); /* Accumulator value CPCAP_REG_CCA1 & 2 */ ccd->accumulator = ((s16)buf[3]) << 16; -- 2.20.1