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authorMichał Mirosław <mirq-linux@rere.qmqm.pl>2020-09-26 21:05:34 +0200
committerSebastian Reichel <sre@kernel.org>2020-09-30 01:12:22 +0200
commit724083293e18adf805ce5aa6dda2fe6c12071537 (patch)
tree3ece89677009464180f2ed098f7459a383666a45
parent3f41e742ee9413b4d1f5d2edf3c71a5db0c87b81 (diff)
power: supply: bq25890: support IBAT compensation
Add configuration for compensation of IBAT measuring resistor in series with the battery. Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl> Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
-rw-r--r--drivers/power/supply/bq25890_charger.c15
1 files changed, 13 insertions, 2 deletions
diff --git a/drivers/power/supply/bq25890_charger.c b/drivers/power/supply/bq25890_charger.c
index 77150667e36b..ab8398f935c5 100644
--- a/drivers/power/supply/bq25890_charger.c
+++ b/drivers/power/supply/bq25890_charger.c
@@ -83,6 +83,8 @@ struct bq25890_init_data {
u8 boostf; /* boost frequency */
u8 ilim_en; /* enable ILIM pin */
u8 treg; /* thermal regulation threshold */
+ u8 rbatcomp; /* IBAT sense resistor value */
+ u8 vclamp; /* IBAT compensation voltage limit */
};
struct bq25890_state {
@@ -258,6 +260,8 @@ enum bq25890_table_ids {
TBL_VREG,
TBL_BOOSTV,
TBL_SYSVMIN,
+ TBL_VBATCOMP,
+ TBL_RBATCOMP,
/* lookup tables */
TBL_TREG,
@@ -299,6 +303,8 @@ static const union {
[TBL_VREG] = { .rt = {3840000, 4608000, 16000} }, /* uV */
[TBL_BOOSTV] = { .rt = {4550000, 5510000, 64000} }, /* uV */
[TBL_SYSVMIN] = { .rt = {3000000, 3700000, 100000} }, /* uV */
+ [TBL_VBATCOMP] ={ .rt = {0, 224000, 32000} }, /* uV */
+ [TBL_RBATCOMP] ={ .rt = {0, 140000, 20000} }, /* uOhm */
/* lookup tables */
[TBL_TREG] = { .lt = {bq25890_treg_tbl, BQ25890_TREG_TBL_SIZE} },
@@ -648,7 +654,9 @@ static int bq25890_hw_init(struct bq25890_device *bq)
{F_BOOSTI, bq->init_data.boosti},
{F_BOOSTF, bq->init_data.boostf},
{F_EN_ILIM, bq->init_data.ilim_en},
- {F_TREG, bq->init_data.treg}
+ {F_TREG, bq->init_data.treg},
+ {F_BATCMP, bq->init_data.rbatcomp},
+ {F_VCLAMP, bq->init_data.vclamp},
};
ret = bq25890_chip_reset(bq);
@@ -859,11 +867,14 @@ static int bq25890_fw_read_u32_props(struct bq25890_device *bq)
{"ti,boost-max-current", false, TBL_BOOSTI, &init->boosti},
/* optional properties */
- {"ti,thermal-regulation-threshold", true, TBL_TREG, &init->treg}
+ {"ti,thermal-regulation-threshold", true, TBL_TREG, &init->treg},
+ {"ti,ibatcomp-micro-ohms", true, TBL_RBATCOMP, &init->rbatcomp},
+ {"ti,ibatcomp-clamp-microvolt", true, TBL_VBATCOMP, &init->vclamp},
};
/* initialize data for optional properties */
init->treg = 3; /* 120 degrees Celsius */
+ init->rbatcomp = init->vclamp = 0; /* IBAT compensation disabled */
for (i = 0; i < ARRAY_SIZE(props); i++) {
ret = device_property_read_u32(bq->dev, props[i].name,