linux-kernel - [PATCH 05/11] power: supply: qcom

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Message-Id: <20250619-smb2-smb5-support-v1-5-ac5dec51b6e1@linaro.org>
Date: Thu, 19 Jun 2025 16:55:13 +0200
From: Casey Connolly <casey.connolly@...aro.org>
To: Sebastian Reichel <sre@...nel.org>, Rob Herring <robh@...nel.org>, 
 Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Bjorn Andersson <andersson@...nel.org>, 
 Konrad Dybcio <konradybcio@...nel.org>, Kees Cook <kees@...nel.org>, 
 "Gustavo A. R. Silva" <gustavoars@...nel.org>
Cc: linux-arm-msm@...r.kernel.org, linux-pm@...r.kernel.org, 
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Sebastian Reichel <sebastian.reichel@...labora.com>, 
 linux-hardening@...r.kernel.org, Casey Connolly <casey.connolly@...aro.org>
Subject: [PATCH 05/11] power: supply: qcom_smbx: allow disabling charging

Hook up USBIN_CMD_IL so that writing "0" to the status register will
disable charging, this is useful to let users limit charging
automatically.

Signed-off-by: Casey Connolly <casey.connolly@...aro.org>
---
 drivers/power/supply/qcom_smbx.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/power/supply/qcom_smbx.c b/drivers/power/supply/qcom_smbx.c
index b1cb925581ec6b8cfca3897be2de5b00a336c920..fc2a8e20435639a9da4d966c43271beaeb57a03f 100644
--- a/drivers/power/supply/qcom_smbx.c
+++ b/drivers/power/supply/qcom_smbx.c
@@ -692,8 +692,11 @@ static int smb_set_property(struct power_supply *psy,
 {
 	struct smb_chip *chip = power_supply_get_drvdata(psy);

 	switch (psp) {
+	case POWER_SUPPLY_PROP_STATUS:
+		return regmap_update_bits(chip->regmap, chip->base + USBIN_CMD_IL,
+					  USBIN_SUSPEND_BIT, !val->intval);
 	case POWER_SUPPLY_PROP_CURRENT_MAX:
 		return smb_set_current_limit(chip, val->intval);
 	default:
 		dev_err(chip->dev, "No setter for property: %d\n", psp);
@@ -704,8 +707,9 @@ static int smb_set_property(struct power_supply *psy,
 static int smb_property_is_writable(struct power_supply *psy,
 				     enum power_supply_property psp)
 {
 	switch (psp) {
+	case POWER_SUPPLY_PROP_STATUS:
 	case POWER_SUPPLY_PROP_CURRENT_MAX:
 		return 1;
 	default:
 		return 0;

-- 
2.49.0