power: pm8921-bms: scale rbatt with temperature and soc
The rbatt was observed to change with battery temperature and the state
of charge of the battery. Update the BMS driver and the battery data
to include and use a rbatt table indicating its changes w.r.t temperature
and state of charge.
On similar lines provide api for other systems to query battery resistance.
Change-Id: I681675db537b70919e6e0437bd400ce53bf97096
Signed-off-by: Abhijeet Dharmapurikar <adharmap@codeaurora.org>
diff --git a/arch/arm/mach-msm/bms-batterydata.c b/arch/arm/mach-msm/bms-batterydata.c
index e71e350..2960a8b 100644
--- a/arch/arm/mach-msm/bms-batterydata.c
+++ b/arch/arm/mach-msm/bms-batterydata.c
@@ -24,10 +24,11 @@
.cols = 5,
};
-static struct pc_sf_lut palladium_1500_pc_sf = {
+static struct sf_lut palladium_1500_pc_sf = {
.rows = 10,
.cols = 5,
- .cycles = {100, 200, 300, 400, 500},
+ /* row_entries are chargecycles */
+ .row_entries = {100, 200, 300, 400, 500},
.percent = {100, 90, 80, 70, 60, 50, 40, 30, 20, 10},
.sf = {
{97, 93, 93, 90, 87},
@@ -43,6 +44,36 @@
},
};
+static struct sf_lut palladium_1500_rbatt_sf = {
+ .rows = 19,
+ .cols = 5,
+ /* row_entries are temperature */
+ .row_entries = {-20, 0, 20, 40, 65},
+ .percent = {100, 95, 90, 85, 80, 75, 70, 65, 60, 55, 50,
+ 45, 40, 35, 30, 25, 20, 15, 10
+ },
+ .sf = {
+ {645, 301, 100, 80, 69},
+ {616, 290, 100, 79, 69},
+ {586, 279, 100, 78, 68},
+ {564, 270, 100, 78, 68},
+ {546, 262, 100, 78, 68},
+ {537, 256, 100, 79, 68},
+ {536, 253, 100, 79, 69},
+ {552, 258, 100, 81, 71},
+ {618, 284, 100, 80, 72},
+ {643, 290, 100, 77, 68},
+ {673, 294, 100, 77, 68},
+ {720, 296, 100, 77, 69},
+ {769, 294, 100, 76, 68},
+ {821, 288, 100, 74, 67},
+ {892, 284, 100, 74, 61},
+ {1003, 290, 100, 71, 58},
+ {1192, 307, 100, 70, 58},
+ {1579, 345, 100, 68, 57},
+ {1261, 324, 100, 68, 57},
+ }
+};
static struct pc_temp_ocv_lut palladium_1500_pc_temp_ocv = {
.rows = 29,
.cols = 8,
@@ -90,4 +121,6 @@
.fcc_sf_lut = &palladium_1500_fcc_sf,
.pc_temp_ocv_lut = &palladium_1500_pc_temp_ocv,
.pc_sf_lut = &palladium_1500_pc_sf,
+ .rbatt_sf_lut = &palladium_1500_rbatt_sf,
+ .default_rbatt_mohm = 254,
};