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Commit 342dce5e authored by Vamshi Krishna B V's avatar Vamshi Krishna B V
Browse files

power: fg-alg: Improve capcity learning accuracy 



Currently batt_soc_msb and delta_cc_pct are used for initial and
delta cc_uah calculation which resulting in losing some mah
during the calcualtions. Instead use 32 bit batt_soc and delta
cc_soc in centi percentage to improve the accuracy.

CRs-Fixed: 2225348
Change-Id: Idd3fea47a5e15a5db5734a3959a82d4e92aafa24
Signed-off-by: default avatarVamshi Krishna B V <vbv@codeaurora.org>
parent c4feb89e

drivers/power/supply/qcom/fg-alg.c

+12 −10
Original line number Original line Diff line number Diff line
@@ -19,6 +19,7 @@ 
#include "fg-alg.h"

#include "fg-alg.h"





#define FULL_SOC_RAW		255

#define FULL_SOC_RAW		255

#define FULL_BATT_SOC		GENMASK(31, 0)

#define CAPACITY_DELTA_DECIPCT	500

#define CAPACITY_DELTA_DECIPCT	500





/* Cycle counter APIs */

/* Cycle counter APIs */
@@ -351,7 +352,7 @@ static void cap_learning_post_process(struct cap_learning *cl) 
 */

 */

static int cap_learning_process_full_data(struct cap_learning *cl)

static int cap_learning_process_full_data(struct cap_learning *cl)

{

{

	int rc, cc_soc_sw, cc_soc_delta_pct;

	int rc, cc_soc_sw, cc_soc_delta_centi_pct;

	int64_t delta_cap_uah;

	int64_t delta_cap_uah;





	rc = cl->get_cc_soc(cl->data, &cc_soc_sw);

	rc = cl->get_cc_soc(cl->data, &cc_soc_sw);
@@ -360,20 +361,21 @@ static int cap_learning_process_full_data(struct cap_learning *cl) 
		return rc;

		return rc;

	}

	}





	cc_soc_delta_pct =

	cc_soc_delta_centi_pct =

		div64_s64((int64_t)(cc_soc_sw - cl->init_cc_soc_sw) * 100,

		div64_s64((int64_t)(cc_soc_sw - cl->init_cc_soc_sw) * 10000,

			cl->cc_soc_max);

			cl->cc_soc_max);





	/* If the delta is < 50%, then skip processing full data */

	/* If the delta is < 50%, then skip processing full data */

	if (cc_soc_delta_pct < 50) {

	if (cc_soc_delta_centi_pct < 5000) {

		pr_err("cc_soc_delta_pct: %d\n", cc_soc_delta_pct);

		pr_err("cc_soc_delta_centi_pct: %d\n", cc_soc_delta_centi_pct);

		return -ERANGE;

		return -ERANGE;

	}

	}





	delta_cap_uah = div64_s64(cl->learned_cap_uah * cc_soc_delta_pct, 100);

	delta_cap_uah = div64_s64(cl->learned_cap_uah * cc_soc_delta_centi_pct,

				 10000);

	cl->final_cap_uah = cl->init_cap_uah + delta_cap_uah;

	cl->final_cap_uah = cl->init_cap_uah + delta_cap_uah;

	pr_debug("Current cc_soc=%d cc_soc_delta_pct=%d total_cap_uah=%lld\n",

	pr_debug("Current cc_soc=%d cc_soc_delta_centi_pct=%d total_cap_uah=%lld\n",

		cc_soc_sw, cc_soc_delta_pct, cl->final_cap_uah);

		cc_soc_sw, cc_soc_delta_centi_pct, cl->final_cap_uah);

	return 0;

	return 0;

}

}
@@ -401,8 +403,8 @@ static int cap_learning_begin(struct cap_learning *cl, u32 batt_soc) 
		return -EINVAL;

		return -EINVAL;

	}

	}





	cl->init_cap_uah = div64_s64(cl->learned_cap_uah * batt_soc_msb,

	cl->init_cap_uah = div64_s64(cl->learned_cap_uah * batt_soc,

					FULL_SOC_RAW);

					FULL_BATT_SOC);





	if (cl->prime_cc_soc) {

	if (cl->prime_cc_soc) {

		/*

		/*