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power: qpnp-fg-gen3: allow negative Rconn configuration

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In some cases, to offset the battery resistance which may be high
because of battery profile characterization and hardware layout,
negative connector resistance (Rconn) should be specified. Allow
configuring it.

Change-Id: Ief64ac13ba0a384a599fe6fffdbc0d093180d0b8
Signed-off-by: Subbaraman Narayanamurthy <subbaram@codeaurora.org>
This commit is contained in:
Subbaraman Narayanamurthy 2017-03-14 19:50:57 -07:00
parent bda96ffdc0
commit 46b94b6448
1 changed files with 8 additions and 9 deletions
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17
drivers/power/supply/qcom/qpnp-fg-gen3.c
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@ -1598,6 +1598,9 @@ static int fg_rconn_config(struct fg_chip *chip)
u64 scaling_factor;
u32 val = 0;
if (!chip->dt.rconn_mohms)
return 0;
rc = fg_sram_read(chip, PROFILE_INTEGRITY_WORD,
SW_CONFIG_OFFSET, (u8 *)&val, 1, FG_IMA_DEFAULT);
if (rc < 0) {
@ -3176,12 +3179,10 @@ static int fg_hw_init(struct fg_chip *chip)
return rc;
}
if (chip->dt.rconn_mohms > 0) {
rc = fg_rconn_config(chip);
if (rc < 0) {
pr_err("Error in configuring Rconn, rc=%d\n", rc);
return rc;
}
rc = fg_rconn_config(chip);
if (rc < 0) {
pr_err("Error in configuring Rconn, rc=%d\n", rc);
return rc;
}
fg_encode(chip->sp, FG_SRAM_ESR_TIGHT_FILTER,
@ -3957,9 +3958,7 @@ static int fg_parse_dt(struct fg_chip *chip)
pr_err("Error in parsing Ki coefficients, rc=%d\n", rc);
rc = of_property_read_u32(node, "qcom,fg-rconn-mohms", &temp);
if (rc < 0)
chip->dt.rconn_mohms = -EINVAL;
else
if (!rc)
chip->dt.rconn_mohms = temp;
rc = of_property_read_u32(node, "qcom,fg-esr-filter-switch-temp",