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FG: RT9426A add safeguard for ocv_index

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ocv_index is used for ocv_table parameter.
In some case read a invalid ocv_indes(65535/-13),then driver read the wrong
ocv parameter, that make checksum fail and exit the driver.
the ocv_index only 0~4 is valid, if read a invalid ocv_index,
using the default ocv_index to fix above issue.

Change-Id: I633aaa7f9abc4a98abb72cbec45025c8c52d5662
Signed-off-by: liuyc20 <liuyc20@lenovo.com>
Reviewed-on: https://gerrit.mot.com/2151514
SME-Granted: SME Approvals Granted
SLTApproved: Slta Waiver
Tested-by: Jira Key
Reviewed-by: Huosheng Liao <liaohs@motorola.com>
Submit-Approved: Jira Key
This commit is contained in:
liuyc20 2021-12-22 11:08:05 +08:00 • committed by Yuecai Liu
commit 881e346bc6
1 changed files with 7 additions and 1 deletions
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8
drivers/power/rt9426a_fg_mmi/rt9426a_battery.c
View file

@ -2285,11 +2285,17 @@ static int rt9426a_apply_pdata(struct rt9426a_chip *chip)
u8 page_idx=0,extend_reg_cmd_addr=0, array_idx=0;
int volt_now = 0, fd_vth_now = 0, fd_threshold = 0;
int wt_ocv_result = RT9426A_WRITE_OCV_FAIL;
int ocv_index = 0;
dev_info(chip->dev, "%s\n", __func__);
/* read ocv_index before using it */
chip->ocv_index = rt9426a_reg_read_word(chip->i2c, RT9426A_REG_RSVD2);
ocv_index = rt9426a_reg_read_word(chip->i2c, RT9426A_REG_RSVD2);
/* ocv_index only 0~4 is valid, if read a invalid ocv_index, using the default ocv_index */
if (ocv_index < 0 || ocv_index > 4)
chip->ocv_index = 0;
else
chip->ocv_index = ocv_index;
dev_info(chip->dev, "%s: ocv_index = %d\n",
__func__, chip->ocv_index);
/* update ocv_checksum_dtsi after ocv_index updated */