[RFC PATCH v2 0/3] Add Xiaomi 12 Lite 5G (taoyao) battery support

[RFC PATCH v2 0/3] Add Xiaomi 12 Lite 5G (taoyao) battery support

[user.email]

From: Stanislav Zaikin <zstaseg@gmail.com>

Xiaomi 12 Lite 5G (taoyao) has an additional property with ID 12 that
breaks the parsing in qcom_battmgr. Fix that by introducing separate
maps for lookups properties in both directions.

The other approach that I tried is manual shifting properties:

+	if (battmgr->variant == QCOM_BATTMGR_TAOYAO && prop > BATT_CHG_CTRL_LIM_MAX)
+		prop++;
...
+		if (battmgr->variant == QCOM_BATTMGR_TAOYAO && property > BATT_CHG_CTRL_LIM_MAX + 1)
+			property--;

But I found that more obscure.

Will be happy to switch if the maintainers prefer this one.

Changes in v2:
- Keep the qcom,sm7325-pmic-glink SoC fallback in the compatible chain
  of the taoyao pmic-glink node (review feedback, patch #1 and #3)

Stanislav Zaikin (3):
  dt-bindings: soc: qcom: add xiaomi,taoyao-pmic-glink compatible
  power: supply: qcom_battmgr: add Xiaomi taoyao support
  arm64: dts: qcom: sm7325-xiaomi-taoyao: switch to device-specific
    pmic-glink compatible

 .../bindings/soc/qcom/qcom,pmic-glink.yaml    |  5 ++
 .../boot/dts/qcom/sm7325-xiaomi-taoyao.dts    |  3 +-
 drivers/power/supply/qcom_battmgr.c           | 86 ++++++++++++++++++-
 3 files changed, 89 insertions(+), 5 deletions(-)

-- 
2.53.0

[PATCH v2 1/3] dt-bindings: soc: qcom: add xiaomi,taoyao-pmic-glink compatible

[user.email]

From: Stanislav Zaikin <zstaseg@gmail.com>

Add the compatible string used by Xiaomi 12 Lite 5G (taoyao) so its
battery manager can be matched to a device-specific variant in
qcom_battmgr.

Signed-off-by: Stanislav Zaikin <zstaseg@gmail.com>
---
 .../devicetree/bindings/soc/qcom/qcom,pmic-glink.yaml        | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Documentation/devicetree/bindings/soc/qcom/qcom,pmic-glink.yaml b/Documentation/devicetree/bindings/soc/qcom/qcom,pmic-glink.yaml
index 16ad4f5698fc..3a74b5e51e9d 100644
--- a/Documentation/devicetree/bindings/soc/qcom/qcom,pmic-glink.yaml
+++ b/Documentation/devicetree/bindings/soc/qcom/qcom,pmic-glink.yaml
@@ -43,6 +43,11 @@ properties:
               - qcom,sm7325-pmic-glink
           - const: qcom,qcm6490-pmic-glink
           - const: qcom,pmic-glink
+      - items:
+          - const: xiaomi,taoyao-pmic-glink
+          - const: qcom,sm7325-pmic-glink
+          - const: qcom,qcm6490-pmic-glink
+          - const: qcom,pmic-glink
       - items:
           - enum:
               - qcom,eliza-pmic-glink
-- 
2.53.0

[PATCH v2 2/3] power: supply: qcom_battmgr: add Xiaomi taoyao support

[user.email]

From: Stanislav Zaikin <zstaseg@gmail.com>

The Xiaomi taoyao firmware defines an additional BATT_CONSTANT_CURRENT
property (ID 12) between BATT_CHG_CTRL_LIM_MAX and BATT_TEMP, shifting
all higher battery property IDs by one.

Signed-off-by: Stanislav Zaikin <zstaseg@gmail.com>
---
 drivers/power/supply/qcom_battmgr.c | 86 +++++++++++++++++++++++++++--
 1 file changed, 82 insertions(+), 4 deletions(-)

diff --git a/drivers/power/supply/qcom_battmgr.c b/drivers/power/supply/qcom_battmgr.c
index 490137a23d00..390d7c75e36f 100644
--- a/drivers/power/supply/qcom_battmgr.c
+++ b/drivers/power/supply/qcom_battmgr.c
@@ -24,6 +24,7 @@ enum qcom_battmgr_variant {
 	QCOM_BATTMGR_SM8350,
 	QCOM_BATTMGR_SM8550,
 	QCOM_BATTMGR_X1E80100,
+	QCOM_BATTMGR_TAOYAO,
 };
 
 #define BATTMGR_BAT_STATUS		0x1
@@ -451,16 +452,87 @@ static const u8 sm8350_bat_prop_map[] = {
 	[POWER_SUPPLY_PROP_CHARGE_CONTROL_END_THRESHOLD] = BATT_CHG_CTRL_END_THR,
 };
 
+/*
+ * Xiaomi Taoyao firmware has BATT_CONSTANT_CURRENT (ID 12) inserted
+ * between BATT_CHG_CTRL_LIM_MAX and BATT_TEMP, shifting all subsequent
+ * IDs by one.
+ */
+static const u8 taoyao_bat_prop_map[] = {
+	[POWER_SUPPLY_PROP_STATUS] = BATT_STATUS,
+	[POWER_SUPPLY_PROP_HEALTH] = BATT_HEALTH,
+	[POWER_SUPPLY_PROP_PRESENT] = BATT_PRESENT,
+	[POWER_SUPPLY_PROP_CHARGE_TYPE] = BATT_CHG_TYPE,
+	[POWER_SUPPLY_PROP_CAPACITY] = BATT_CAPACITY,
+	[POWER_SUPPLY_PROP_VOLTAGE_OCV] = BATT_VOLT_OCV,
+	[POWER_SUPPLY_PROP_VOLTAGE_NOW] = BATT_VOLT_NOW,
+	[POWER_SUPPLY_PROP_VOLTAGE_MAX] = BATT_VOLT_MAX,
+	[POWER_SUPPLY_PROP_CURRENT_NOW] = BATT_CURR_NOW,
+	[POWER_SUPPLY_PROP_TEMP] = BATT_TEMP + 1,
+	[POWER_SUPPLY_PROP_TECHNOLOGY] = BATT_TECHNOLOGY + 1,
+	[POWER_SUPPLY_PROP_CHARGE_COUNTER] = BATT_CHG_COUNTER + 1,
+	[POWER_SUPPLY_PROP_CYCLE_COUNT] = BATT_CYCLE_COUNT + 1,
+	[POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN] = BATT_CHG_FULL_DESIGN + 1,
+	[POWER_SUPPLY_PROP_CHARGE_FULL] = BATT_CHG_FULL + 1,
+	[POWER_SUPPLY_PROP_MODEL_NAME] = BATT_MODEL_NAME + 1,
+	[POWER_SUPPLY_PROP_TIME_TO_FULL_AVG] = BATT_TTF_AVG + 1,
+	[POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG] = BATT_TTE_AVG + 1,
+	[POWER_SUPPLY_PROP_INTERNAL_RESISTANCE] = BATT_RESISTANCE + 1,
+	[POWER_SUPPLY_PROP_STATE_OF_HEALTH] = BATT_SOH,
+	[POWER_SUPPLY_PROP_POWER_NOW] = BATT_POWER_NOW + 1,
+	[POWER_SUPPLY_PROP_CHARGE_CONTROL_START_THRESHOLD] = BATT_CHG_CTRL_START_THR + 1,
+	[POWER_SUPPLY_PROP_CHARGE_CONTROL_END_THRESHOLD] = BATT_CHG_CTRL_END_THR + 1,
+};
+
+/*
+ * Reverse mapping from Xiaomi Taoyao firmware property IDs to canonical
+ * kernel property IDs.
+ */
+static const u8 taoyao_to_canonical[] = {
+	[BATT_STATUS] = BATT_STATUS,
+	[BATT_HEALTH] = BATT_HEALTH,
+	[BATT_PRESENT] = BATT_PRESENT,
+	[BATT_CHG_TYPE] = BATT_CHG_TYPE,
+	[BATT_CAPACITY] = BATT_CAPACITY,
+	[BATT_SOH] = BATT_SOH,
+	[BATT_VOLT_OCV] = BATT_VOLT_OCV,
+	[BATT_VOLT_NOW] = BATT_VOLT_NOW,
+	[BATT_VOLT_MAX] = BATT_VOLT_MAX,
+	[BATT_CURR_NOW] = BATT_CURR_NOW,
+	[BATT_CHG_CTRL_LIM] = BATT_CHG_CTRL_LIM,
+	[BATT_CHG_CTRL_LIM_MAX] = BATT_CHG_CTRL_LIM_MAX,
+	[BATT_CHG_CTRL_LIM_MAX + 1] = 0xff,	/* BATT_CONSTANT_CURRENT - never requested */
+	[BATT_TEMP + 1] = BATT_TEMP,
+	[BATT_TECHNOLOGY + 1] = BATT_TECHNOLOGY,
+	[BATT_CHG_COUNTER + 1] = BATT_CHG_COUNTER,
+	[BATT_CYCLE_COUNT + 1] = BATT_CYCLE_COUNT,
+	[BATT_CHG_FULL_DESIGN + 1] = BATT_CHG_FULL_DESIGN,
+	[BATT_CHG_FULL + 1] = BATT_CHG_FULL,
+	[BATT_MODEL_NAME + 1] = BATT_MODEL_NAME,
+	[BATT_TTF_AVG + 1] = BATT_TTF_AVG,
+	[BATT_TTE_AVG + 1] = BATT_TTE_AVG,
+	[BATT_RESISTANCE + 1] = BATT_RESISTANCE,
+	[BATT_POWER_NOW + 1] = BATT_POWER_NOW,
+	[BATT_POWER_AVG + 1] = BATT_POWER_AVG,
+	[BATT_CHG_CTRL_EN + 1] = BATT_CHG_CTRL_EN,
+	[BATT_CHG_CTRL_START_THR + 1] = BATT_CHG_CTRL_START_THR,
+	[BATT_CHG_CTRL_END_THR + 1] = BATT_CHG_CTRL_END_THR,
+};
+
 static int qcom_battmgr_bat_sm8350_update(struct qcom_battmgr *battmgr,
 					  enum power_supply_property psp)
 {
 	unsigned int prop;
 	int ret;
 
-	if (psp >= ARRAY_SIZE(sm8350_bat_prop_map))
-		return -EINVAL;
-
-	prop = sm8350_bat_prop_map[psp];
+	if (battmgr->variant == QCOM_BATTMGR_TAOYAO) {
+		if (psp >= ARRAY_SIZE(taoyao_bat_prop_map))
+			return -EINVAL;
+		prop = taoyao_bat_prop_map[psp];
+	} else {
+		if (psp >= ARRAY_SIZE(sm8350_bat_prop_map))
+			return -EINVAL;
+		prop = sm8350_bat_prop_map[psp];
+	}
 
 	mutex_lock(&battmgr->lock);
 	ret = qcom_battmgr_request_property(battmgr, BATTMGR_BAT_PROPERTY_GET, prop, 0);
@@ -1381,6 +1453,11 @@ static void qcom_battmgr_sm8350_callback(struct qcom_battmgr *battmgr,
 	switch (opcode) {
 	case BATTMGR_BAT_PROPERTY_GET:
 		property = le32_to_cpu(resp->intval.property);
+
+		if (battmgr->variant == QCOM_BATTMGR_TAOYAO &&
+		    property < ARRAY_SIZE(taoyao_to_canonical))
+			property = taoyao_to_canonical[property];
+
 		if (property == BATT_MODEL_NAME) {
 			if (payload_len != sizeof(resp->strval)) {
 				dev_warn(battmgr->dev,
@@ -1617,6 +1694,7 @@ static const struct of_device_id qcom_battmgr_of_variants[] = {
 	{ .compatible = "qcom,sc8280xp-pmic-glink", .data = (void *)QCOM_BATTMGR_SC8280XP },
 	{ .compatible = "qcom,sm8550-pmic-glink", .data = (void *)QCOM_BATTMGR_SM8550 },
 	{ .compatible = "qcom,x1e80100-pmic-glink", .data = (void *)QCOM_BATTMGR_X1E80100 },
+	{ .compatible = "xiaomi,taoyao-pmic-glink", .data = (void *)QCOM_BATTMGR_TAOYAO },
 	/* Unmatched devices falls back to QCOM_BATTMGR_SM8350 */
 	{}
 };
-- 
2.53.0

Re: [PATCH v2 2/3] power: supply: qcom_battmgr: add Xiaomi taoyao support

[Krzysztof Kozlowski]

On Tue, Aug 18, 2026 at 05:10:38PM +0200, user.email wrote:
> From: Stanislav Zaikin <zstaseg@gmail.com>
> 
> The Xiaomi taoyao firmware defines an additional BATT_CONSTANT_CURRENT
> property (ID 12) between BATT_CHG_CTRL_LIM_MAX and BATT_TEMP, shifting
> all higher battery property IDs by one.
> 
> Signed-off-by: Stanislav Zaikin <zstaseg@gmail.com>
> ---
>  drivers/power/supply/qcom_battmgr.c | 86 +++++++++++++++++++++++++++--
>  1 file changed, 82 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/power/supply/qcom_battmgr.c b/drivers/power/supply/qcom_battmgr.c
> index 490137a23d00..390d7c75e36f 100644
> --- a/drivers/power/supply/qcom_battmgr.c
> +++ b/drivers/power/supply/qcom_battmgr.c
> @@ -24,6 +24,7 @@ enum qcom_battmgr_variant {
>  	QCOM_BATTMGR_SM8350,
>  	QCOM_BATTMGR_SM8550,
>  	QCOM_BATTMGR_X1E80100,
> +	QCOM_BATTMGR_TAOYAO,

T < X, do not introduce entries in random order

>  };
>  
>  #define BATTMGR_BAT_STATUS		0x1
> @@ -451,16 +452,87 @@ static const u8 sm8350_bat_prop_map[] = {
>  	[POWER_SUPPLY_PROP_CHARGE_CONTROL_END_THRESHOLD] = BATT_CHG_CTRL_END_THR,
>  };
>  
> +/*
> + * Xiaomi Taoyao firmware has BATT_CONSTANT_CURRENT (ID 12) inserted
> + * between BATT_CHG_CTRL_LIM_MAX and BATT_TEMP, shifting all subsequent
> + * IDs by one.
> + */
> +static const u8 taoyao_bat_prop_map[] = {
> +	[POWER_SUPPLY_PROP_STATUS] = BATT_STATUS,
> +	[POWER_SUPPLY_PROP_HEALTH] = BATT_HEALTH,
> +	[POWER_SUPPLY_PROP_PRESENT] = BATT_PRESENT,
> +	[POWER_SUPPLY_PROP_CHARGE_TYPE] = BATT_CHG_TYPE,
> +	[POWER_SUPPLY_PROP_CAPACITY] = BATT_CAPACITY,
> +	[POWER_SUPPLY_PROP_VOLTAGE_OCV] = BATT_VOLT_OCV,
> +	[POWER_SUPPLY_PROP_VOLTAGE_NOW] = BATT_VOLT_NOW,
> +	[POWER_SUPPLY_PROP_VOLTAGE_MAX] = BATT_VOLT_MAX,
> +	[POWER_SUPPLY_PROP_CURRENT_NOW] = BATT_CURR_NOW,
> +	[POWER_SUPPLY_PROP_TEMP] = BATT_TEMP + 1,
> +	[POWER_SUPPLY_PROP_TECHNOLOGY] = BATT_TECHNOLOGY + 1,
> +	[POWER_SUPPLY_PROP_CHARGE_COUNTER] = BATT_CHG_COUNTER + 1,
> +	[POWER_SUPPLY_PROP_CYCLE_COUNT] = BATT_CYCLE_COUNT + 1,
> +	[POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN] = BATT_CHG_FULL_DESIGN + 1,
> +	[POWER_SUPPLY_PROP_CHARGE_FULL] = BATT_CHG_FULL + 1,
> +	[POWER_SUPPLY_PROP_MODEL_NAME] = BATT_MODEL_NAME + 1,
> +	[POWER_SUPPLY_PROP_TIME_TO_FULL_AVG] = BATT_TTF_AVG + 1,
> +	[POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG] = BATT_TTE_AVG + 1,
> +	[POWER_SUPPLY_PROP_INTERNAL_RESISTANCE] = BATT_RESISTANCE + 1,
> +	[POWER_SUPPLY_PROP_STATE_OF_HEALTH] = BATT_SOH,
> +	[POWER_SUPPLY_PROP_POWER_NOW] = BATT_POWER_NOW + 1,
> +	[POWER_SUPPLY_PROP_CHARGE_CONTROL_START_THRESHOLD] = BATT_CHG_CTRL_START_THR + 1,
> +	[POWER_SUPPLY_PROP_CHARGE_CONTROL_END_THRESHOLD] = BATT_CHG_CTRL_END_THR + 1,
> +};
> +
> +/*
> + * Reverse mapping from Xiaomi Taoyao firmware property IDs to canonical
> + * kernel property IDs.
> + */
> +static const u8 taoyao_to_canonical[] = {
> +	[BATT_STATUS] = BATT_STATUS,
> +	[BATT_HEALTH] = BATT_HEALTH,
> +	[BATT_PRESENT] = BATT_PRESENT,
> +	[BATT_CHG_TYPE] = BATT_CHG_TYPE,
> +	[BATT_CAPACITY] = BATT_CAPACITY,
> +	[BATT_SOH] = BATT_SOH,
> +	[BATT_VOLT_OCV] = BATT_VOLT_OCV,
> +	[BATT_VOLT_NOW] = BATT_VOLT_NOW,
> +	[BATT_VOLT_MAX] = BATT_VOLT_MAX,
> +	[BATT_CURR_NOW] = BATT_CURR_NOW,
> +	[BATT_CHG_CTRL_LIM] = BATT_CHG_CTRL_LIM,
> +	[BATT_CHG_CTRL_LIM_MAX] = BATT_CHG_CTRL_LIM_MAX,
> +	[BATT_CHG_CTRL_LIM_MAX + 1] = 0xff,	/* BATT_CONSTANT_CURRENT - never requested */
> +	[BATT_TEMP + 1] = BATT_TEMP,
> +	[BATT_TECHNOLOGY + 1] = BATT_TECHNOLOGY,
> +	[BATT_CHG_COUNTER + 1] = BATT_CHG_COUNTER,
> +	[BATT_CYCLE_COUNT + 1] = BATT_CYCLE_COUNT,
> +	[BATT_CHG_FULL_DESIGN + 1] = BATT_CHG_FULL_DESIGN,
> +	[BATT_CHG_FULL + 1] = BATT_CHG_FULL,
> +	[BATT_MODEL_NAME + 1] = BATT_MODEL_NAME,
> +	[BATT_TTF_AVG + 1] = BATT_TTF_AVG,
> +	[BATT_TTE_AVG + 1] = BATT_TTE_AVG,
> +	[BATT_RESISTANCE + 1] = BATT_RESISTANCE,
> +	[BATT_POWER_NOW + 1] = BATT_POWER_NOW,
> +	[BATT_POWER_AVG + 1] = BATT_POWER_AVG,
> +	[BATT_CHG_CTRL_EN + 1] = BATT_CHG_CTRL_EN,
> +	[BATT_CHG_CTRL_START_THR + 1] = BATT_CHG_CTRL_START_THR,
> +	[BATT_CHG_CTRL_END_THR + 1] = BATT_CHG_CTRL_END_THR,
> +};
> +
>  static int qcom_battmgr_bat_sm8350_update(struct qcom_battmgr *battmgr,
>  					  enum power_supply_property psp)
>  {
>  	unsigned int prop;
>  	int ret;
>  
> -	if (psp >= ARRAY_SIZE(sm8350_bat_prop_map))
> -		return -EINVAL;
> -
> -	prop = sm8350_bat_prop_map[psp];
> +	if (battmgr->variant == QCOM_BATTMGR_TAOYAO) {
> +		if (psp >= ARRAY_SIZE(taoyao_bat_prop_map))
> +			return -EINVAL;
> +		prop = taoyao_bat_prop_map[psp];
> +	} else {
> +		if (psp >= ARRAY_SIZE(sm8350_bat_prop_map))
> +			return -EINVAL;
> +		prop = sm8350_bat_prop_map[psp];
> +	}
>  
>  	mutex_lock(&battmgr->lock);
>  	ret = qcom_battmgr_request_property(battmgr, BATTMGR_BAT_PROPERTY_GET, prop, 0);
> @@ -1381,6 +1453,11 @@ static void qcom_battmgr_sm8350_callback(struct qcom_battmgr *battmgr,
>  	switch (opcode) {
>  	case BATTMGR_BAT_PROPERTY_GET:
>  		property = le32_to_cpu(resp->intval.property);
> +
> +		if (battmgr->variant == QCOM_BATTMGR_TAOYAO &&
> +		    property < ARRAY_SIZE(taoyao_to_canonical))
> +			property = taoyao_to_canonical[property];

So device is or is not compatible with sm7325? Above code suggests that
it is not. How does it work when bound by sm7325 compatible?

> +
>  		if (property == BATT_MODEL_NAME) {
>  			if (payload_len != sizeof(resp->strval)) {
>  				dev_warn(battmgr->dev,
> @@ -1617,6 +1694,7 @@ static const struct of_device_id qcom_battmgr_of_variants[] = {
>  	{ .compatible = "qcom,sc8280xp-pmic-glink", .data = (void *)QCOM_BATTMGR_SC8280XP },
>  	{ .compatible = "qcom,sm8550-pmic-glink", .data = (void *)QCOM_BATTMGR_SM8550 },
>  	{ .compatible = "qcom,x1e80100-pmic-glink", .data = (void *)QCOM_BATTMGR_X1E80100 },
> +	{ .compatible = "xiaomi,taoyao-pmic-glink", .data = (void *)QCOM_BATTMGR_TAOYAO },

And here as well wrong order

>  	/* Unmatched devices falls back to QCOM_BATTMGR_SM8350 */
>  	{}
>  };
> -- 
> 2.53.0
> 

Re: [PATCH v2 2/3] power: supply: qcom_battmgr: add Xiaomi taoyao support

[Stanislav Zaikin]

On 8/19/26 9:11 AM, Krzysztof Kozlowski wrote:
> On Tue, Aug 18, 2026 at 05:10:38PM +0200, user.email wrote:
>> From: Stanislav Zaikin <zstaseg@gmail.com>
>>
>> The Xiaomi taoyao firmware defines an additional BATT_CONSTANT_CURRENT
>> property (ID 12) between BATT_CHG_CTRL_LIM_MAX and BATT_TEMP, shifting
>> all higher battery property IDs by one.
>>
>> Signed-off-by: Stanislav Zaikin <zstaseg@gmail.com>
>> ---
>>   drivers/power/supply/qcom_battmgr.c | 86 +++++++++++++++++++++++++++--
>>   1 file changed, 82 insertions(+), 4 deletions(-)
>>
>> diff --git a/drivers/power/supply/qcom_battmgr.c b/drivers/power/supply/qcom_battmgr.c
>> index 490137a23d00..390d7c75e36f 100644
>> --- a/drivers/power/supply/qcom_battmgr.c
>> +++ b/drivers/power/supply/qcom_battmgr.c
>> @@ -24,6 +24,7 @@ enum qcom_battmgr_variant {
>>   	QCOM_BATTMGR_SM8350,
>>   	QCOM_BATTMGR_SM8550,
>>   	QCOM_BATTMGR_X1E80100,
>> +	QCOM_BATTMGR_TAOYAO,
> 
> T < X, do not introduce entries in random order

Hello Krzysztof,
Thank you for the review.

Will fix in v3.

>> @@ -1381,6 +1453,11 @@ static void qcom_battmgr_sm8350_callback(struct qcom_battmgr *battmgr,
>>   	switch (opcode) {
>>   	case BATTMGR_BAT_PROPERTY_GET:
>>   		property = le32_to_cpu(resp->intval.property);
>> +
>> +		if (battmgr->variant == QCOM_BATTMGR_TAOYAO &&
>> +		    property < ARRAY_SIZE(taoyao_to_canonical))
>> +			property = taoyao_to_canonical[property];
> 
> So device is or is not compatible with sm7325? Above code suggests that
> it is not. How does it work when bound by sm7325 compatible?

The device is sm7325-based and when bound to sm7325-pmic-glink it falls 
back to QCOM_BATTMGR_SM8350 property map. However, due to shifted 
property IDs baked into taoyao's firmware the parsing of roughly the 2nd 
half of properties is broken.

And any userspace process that reads the battery properties via sysfs 
suffers from 1s timeouts and it basically hangs my DE.

Since this is an RFC: do you think this approach is better than what I 
described in cover letter? (manually shifting property IDs)

>> @@ -1617,6 +1694,7 @@ static const struct of_device_id qcom_battmgr_of_variants[] = {
>>   	{ .compatible = "qcom,sc8280xp-pmic-glink", .data = (void *)QCOM_BATTMGR_SC8280XP },
>>   	{ .compatible = "qcom,sm8550-pmic-glink", .data = (void *)QCOM_BATTMGR_SM8550 },
>>   	{ .compatible = "qcom,x1e80100-pmic-glink", .data = (void *)QCOM_BATTMGR_X1E80100 },
>> +	{ .compatible = "xiaomi,taoyao-pmic-glink", .data = (void *)QCOM_BATTMGR_TAOYAO },
> 
> And here as well wrong order

Will fix in v3.

--
Best regards,
Stanislav

Re: [PATCH v2 2/3] power: supply: qcom_battmgr: add Xiaomi taoyao support

[Konrad Dybcio]

On 8/19/26 10:37 AM, Stanislav Zaikin wrote:
> On 8/19/26 9:11 AM, Krzysztof Kozlowski wrote:
>> On Tue, Aug 18, 2026 at 05:10:38PM +0200, user.email wrote:
>>> From: Stanislav Zaikin <zstaseg@gmail.com>
>>>
>>> The Xiaomi taoyao firmware defines an additional BATT_CONSTANT_CURRENT
>>> property (ID 12) between BATT_CHG_CTRL_LIM_MAX and BATT_TEMP, shifting
>>> all higher battery property IDs by one.
>>>
>>> Signed-off-by: Stanislav Zaikin <zstaseg@gmail.com>
>>> ---
>>>   drivers/power/supply/qcom_battmgr.c | 86 +++++++++++++++++++++++++++--
>>>   1 file changed, 82 insertions(+), 4 deletions(-)
>>>
>>> diff --git a/drivers/power/supply/qcom_battmgr.c b/drivers/power/supply/qcom_battmgr.c
>>> index 490137a23d00..390d7c75e36f 100644
>>> --- a/drivers/power/supply/qcom_battmgr.c
>>> +++ b/drivers/power/supply/qcom_battmgr.c
>>> @@ -24,6 +24,7 @@ enum qcom_battmgr_variant {
>>>       QCOM_BATTMGR_SM8350,
>>>       QCOM_BATTMGR_SM8550,
>>>       QCOM_BATTMGR_X1E80100,
>>> +    QCOM_BATTMGR_TAOYAO,
>>
>> T < X, do not introduce entries in random order
> 
> Hello Krzysztof,
> Thank you for the review.
> 
> Will fix in v3.
> 
>>> @@ -1381,6 +1453,11 @@ static void qcom_battmgr_sm8350_callback(struct qcom_battmgr *battmgr,
>>>       switch (opcode) {
>>>       case BATTMGR_BAT_PROPERTY_GET:
>>>           property = le32_to_cpu(resp->intval.property);
>>> +
>>> +        if (battmgr->variant == QCOM_BATTMGR_TAOYAO &&
>>> +            property < ARRAY_SIZE(taoyao_to_canonical))
>>> +            property = taoyao_to_canonical[property];
>>
>> So device is or is not compatible with sm7325? Above code suggests that
>> it is not. How does it work when bound by sm7325 compatible?
> 
> The device is sm7325-based and when bound to sm7325-pmic-glink it falls back to QCOM_BATTMGR_SM8350 property map. However, due to shifted property IDs baked into taoyao's firmware the parsing of roughly the 2nd half of properties is broken.
> 
> And any userspace process that reads the battery properties via sysfs suffers from 1s timeouts and it basically hangs my DE.
> 
> Since this is an RFC: do you think this approach is better than what I described in cover letter? (manually shifting property IDs)

Krzysztof is trying to say that even though the device is based on the
7325 SoC, what the kernel today knows as "pmic glink on sm7325" is not
compatible with the customized firmware on your device, so the fallback
compatible should be dropped, as it suggests that is the case

Konrad

Re: [PATCH v2 2/3] power: supply: qcom_battmgr: add Xiaomi taoyao support

[Krzysztof Kozlowski]

On 19/08/2026 10:37, Stanislav Zaikin wrote:
> On 8/19/26 9:11 AM, Krzysztof Kozlowski wrote:
>> On Tue, Aug 18, 2026 at 05:10:38PM +0200, user.email wrote:
>>> From: Stanislav Zaikin <zstaseg@gmail.com>
>>>
>>> The Xiaomi taoyao firmware defines an additional BATT_CONSTANT_CURRENT
>>> property (ID 12) between BATT_CHG_CTRL_LIM_MAX and BATT_TEMP, shifting
>>> all higher battery property IDs by one.
>>>
>>> Signed-off-by: Stanislav Zaikin <zstaseg@gmail.com>
>>> ---
>>>   drivers/power/supply/qcom_battmgr.c | 86 +++++++++++++++++++++++++++--
>>>   1 file changed, 82 insertions(+), 4 deletions(-)
>>>
>>> diff --git a/drivers/power/supply/qcom_battmgr.c b/drivers/power/supply/qcom_battmgr.c
>>> index 490137a23d00..390d7c75e36f 100644
>>> --- a/drivers/power/supply/qcom_battmgr.c
>>> +++ b/drivers/power/supply/qcom_battmgr.c
>>> @@ -24,6 +24,7 @@ enum qcom_battmgr_variant {
>>>   	QCOM_BATTMGR_SM8350,
>>>   	QCOM_BATTMGR_SM8550,
>>>   	QCOM_BATTMGR_X1E80100,
>>> +	QCOM_BATTMGR_TAOYAO,
>>
>> T < X, do not introduce entries in random order
> 
> Hello Krzysztof,
> Thank you for the review.
> 
> Will fix in v3.
> 
>>> @@ -1381,6 +1453,11 @@ static void qcom_battmgr_sm8350_callback(struct qcom_battmgr *battmgr,
>>>   	switch (opcode) {
>>>   	case BATTMGR_BAT_PROPERTY_GET:
>>>   		property = le32_to_cpu(resp->intval.property);
>>> +
>>> +		if (battmgr->variant == QCOM_BATTMGR_TAOYAO &&
>>> +		    property < ARRAY_SIZE(taoyao_to_canonical))
>>> +			property = taoyao_to_canonical[property];
>>
>> So device is or is not compatible with sm7325? Above code suggests that
>> it is not. How does it work when bound by sm7325 compatible?
> 
> The device is sm7325-based and when bound to sm7325-pmic-glink it falls 
> back to QCOM_BATTMGR_SM8350 property map. However, due to shifted 
> property IDs baked into taoyao's firmware the parsing of roughly the 2nd 
> half of properties is broken.
> 
> And any userspace process that reads the battery properties via sysfs 
> suffers from 1s timeouts and it basically hangs my DE.

So basically it is not compatible with sm7325-pmic-glink and it should
be expressed/fixed. I wonder though how was the DTS even tested in this
matter.

> 
> Since this is an RFC: do you think this approach is better than what I 
> described in cover letter? (manually shifting property IDs)

Every patch is RFC... or are you saying this is a RFC in a meaning it is
 not ready for review?

> 
>>> @@ -1617,6 +1694,7 @@ static const struct of_device_id qcom_battmgr_of_variants[] = {
>>>   	{ .compatible = "qcom,sc8280xp-pmic-glink", .data = (void *)QCOM_BATTMGR_SC8280XP },
>>>   	{ .compatible = "qcom,sm8550-pmic-glink", .data = (void *)QCOM_BATTMGR_SM8550 },
>>>   	{ .compatible = "qcom,x1e80100-pmic-glink", .data = (void *)QCOM_BATTMGR_X1E80100 },
>>> +	{ .compatible = "xiaomi,taoyao-pmic-glink", .data = (void *)QCOM_BATTMGR_TAOYAO },
>>
>> And here as well wrong order
> 
> Will fix in v3.
> 
> --
> Best regards,
> Stanislav
> 


Best regards,
Krzysztof

[PATCH v2 3/3] arm64: dts: qcom: sm7325-xiaomi-taoyao: switch to device-specific pmic-glink compatible

[user.email]

From: Stanislav Zaikin <zstaseg@gmail.com>

Switch taoyao to its own compatible so qcom_battmgr can select the
taoyao-specific property mapping added in the previous patch.

Signed-off-by: Stanislav Zaikin <zstaseg@gmail.com>
---
 arch/arm64/boot/dts/qcom/sm7325-xiaomi-taoyao.dts | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/qcom/sm7325-xiaomi-taoyao.dts b/arch/arm64/boot/dts/qcom/sm7325-xiaomi-taoyao.dts
index 6f8bc65bb99b..6621cb40e710 100644
--- a/arch/arm64/boot/dts/qcom/sm7325-xiaomi-taoyao.dts
+++ b/arch/arm64/boot/dts/qcom/sm7325-xiaomi-taoyao.dts
@@ -72,7 +72,8 @@ key-volume-up {
 	};
 
 	pmic-glink {
-		compatible = "qcom,sm7325-pmic-glink",
+		compatible = "xiaomi,taoyao-pmic-glink",
+			     "qcom,sm7325-pmic-glink",
 			     "qcom,qcm6490-pmic-glink",
 			     "qcom,pmic-glink";
 
-- 
2.53.0

Re: [PATCH v2 3/3] arm64: dts: qcom: sm7325-xiaomi-taoyao: switch to device-specific pmic-glink compatible

[Krzysztof Kozlowski]

On Tue, Aug 18, 2026 at 05:10:39PM +0200, user.email wrote:
> From: Stanislav Zaikin <zstaseg@gmail.com>
> 
> Switch taoyao to its own compatible so qcom_battmgr can select the
> taoyao-specific property mapping added in the previous patch.

How is it going to be a "previous patch"? Previous patch is a different
DTS commit - look at the DTS branch of qcom soc or any other soc tree.

Best regards,
Krzysztof