commit 219cb2209e9d461b825619fbf4c526219088e6e8
author Xiaozhe Shi <xiaozhes@codeaurora.org> Mon Jun 10 15:49:59 2013 -0700
committer Xiaozhe Shi <xiaozhes@codeaurora.org> Tue Jun 18 12:16:12 2013 -0700
tree 6160e7e7c21134f279e06159ca6e4b0bacab504d
parent f3da862d802ce286c6f7ffd8da5091780ee50aab

power: qpnp-bms: improve coulomb counter shadow performance

Improve the shadow coulomb counter performance by keeping a software
shadow of it and periodically adding error compensated readings.

Change-Id: Ie549b7d0eef362f7473621de78f536173dcff09d
Signed-off-by: Xiaozhe Shi <xiaozhes@codeaurora.org>

drivers/power/qpnp-bms.c

diff --git a/drivers/power/qpnp-bms.c b/drivers/power/qpnp-bms.c
index 0dfa545..14cba58 100644
--- a/drivers/power/qpnp-bms.c
+++ b/drivers/power/qpnp-bms.c
@@ -1306,7 +1306,7 @@
 						struct soc_params *params,
 						int batt_temp)
 {
-	int soc_rbatt;
+	int soc_rbatt, shdw_cc_uah;
 
 	calculate_delta_time(&chip->tm_sec, &params->delta_time_s);
 	pr_debug("tm_sec = %ld, delta_s = %d\n",
@@ -1322,8 +1322,10 @@
 
 	/* calculate cc micro_volt_hour */
 	params->cc_uah = calculate_cc(chip, raw->cc, CC, RESET);
-	pr_debug("cc_uah = %duAh raw->cc = %llx\n",
-			params->cc_uah, raw->cc);
+	shdw_cc_uah = calculate_cc(chip, raw->shdw_cc, SHDW_CC, RESET);
+	pr_debug("cc_uah = %duAh raw->cc = %llx, shdw_cc_uah = %duAh raw->shdw_cc = %llx\n",
+			params->cc_uah, raw->cc,
+			shdw_cc_uah, raw->shdw_cc);
 
 	soc_rbatt = ((params->ocv_charge_uah - params->cc_uah) * 100)
 							/ params->fcc_uah;