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power: supply: cpcap-battery: Fix signed counter sample register 

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@atomide.com>
Acked-by: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
hifive-unleashed-5.2
Tony Lindgren 2019-04-07 11:12:50 -07:00 committed by Sebastian Reichel
parent 1a9aadc86a
commit c68b901ac4
1 changed files with 6 additions and 5 deletions
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11
drivers/power/supply/cpcap-battery.c
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@ -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;