[PATCH v4 0/2] Handle shared reset GPIO for WSA883x speakers

[PATCH v4 0/2] Handle shared reset GPIO for WSA883x speakers

[Mohammad Rafi Shaik]

On some Qualcomm platforms such as QCS6490-RB3Gen2, the multiple
WSA8830/WSA8835 speakers share a common reset (shutdown) GPIO.
To handle such cases, use the reset controller framework along with the
"reset-gpio" driver.

Tested on:
	- QCS6490-RB3Gen2

changes in [v4]:
	- Dropped v3-0002 patch, which is not required.
	  Fixed with proper error handling for failure cases.
	- Link to V3: https://lore.kernel.org/linux-arm-msm/20250727083117.2415725-1-mohammad.rafi.shaik@oss.qualcomm.com/

changes in [v3]:
	- Created separate patch for devm action to safely disable
	  regulator.
	- cleanup the v2-0002 patch.
	- Link to V2: https://lore.kernel.org/linux-sound/20250718104628.3732645-1-mohammad.rafi.shaik@oss.qualcomm.com/

changes in [v2]:
	- Addressed the review comments from Krzysztof, Dmitry, Philipp.
	- Used devm_reset_control_get_optional_shared_deasserted() api.
	- created deasserts/asserts functions to handle reset gpios.
	- Register devm action to safely disable the regulator on device removal.
	- Link to V1: https://lore.kernel.org/linux-sound/20250620103012.360794-1-mohammad.rafi.shaik@oss.qualcomm.com/	

Mohammad Rafi Shaik (2):
  ASoC: dt-bindings: qcom,wsa8830: Add reset-gpios for shared line
  ASoC: codecs: wsa883x: Handle shared reset GPIO for WSA883x speakers

 .../bindings/sound/qcom,wsa883x.yaml          | 11 +++-
 sound/soc/codecs/wsa883x.c                    | 57 ++++++++++++++++---
 2 files changed, 60 insertions(+), 8 deletions(-)


base-commit: b7d4e259682caccb51a25283655f2c8f02e32d23
-- 
2.34.1

[PATCH v4 1/2] ASoC: dt-bindings: qcom,wsa8830: Add reset-gpios for shared line

[Mohammad Rafi Shaik]

On Qualcomm platforms such as QCS6490-RB3Gen2, the WSA883x speaker
amplifiers share the SD_N GPIO line between two speakers, thus
requires coordinated control when asserting the GPIO. Linux supports
shared GPIO handling via the "reset-gpios" property, which can be
used to specify either the powerdown or reset GPIOs.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Mohammad Rafi Shaik <mohammad.rafi.shaik@oss.qualcomm.com>
---
 .../devicetree/bindings/sound/qcom,wsa883x.yaml       | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/sound/qcom,wsa883x.yaml b/Documentation/devicetree/bindings/sound/qcom,wsa883x.yaml
index 14d312f9c345..098f1df62c8c 100644
--- a/Documentation/devicetree/bindings/sound/qcom,wsa883x.yaml
+++ b/Documentation/devicetree/bindings/sound/qcom,wsa883x.yaml
@@ -29,6 +29,10 @@ properties:
     description: GPIO spec for Powerdown/Shutdown line to use (pin SD_N)
     maxItems: 1
 
+  reset-gpios:
+    description: Powerdown/Shutdown line to use (pin SD_N)
+    maxItems: 1
+
   vdd-supply:
     description: VDD Supply for the Codec
 
@@ -50,10 +54,15 @@ required:
   - compatible
   - reg
   - vdd-supply
-  - powerdown-gpios
   - "#thermal-sensor-cells"
   - "#sound-dai-cells"
 
+oneOf:
+  - required:
+      - powerdown-gpios
+  - required:
+      - reset-gpios
+
 unevaluatedProperties: false
 
 examples:
-- 
2.34.1

[PATCH v4 2/2] ASoC: codecs: wsa883x: Handle shared reset GPIO for WSA883x speakers

[Mohammad Rafi Shaik]

From: Mohammad Rafi Shaik <quic_mohs@quicinc.com>

On some Qualcomm platforms such as QCS6490-RB3Gen2, the multiple
WSA8830/WSA8835 speaker amplifiers share a common reset (shutdown) GPIO.

To handle such scenario, use the reset controller framework and its
"reset-gpio" driver to handle such case. This allows proper handling
of all WSA883x speaker amplifiers on QCS6490-RB3Gen2 board.

Signed-off-by: Mohammad Rafi Shaik <quic_mohs@quicinc.com>
---
 sound/soc/codecs/wsa883x.c | 57 +++++++++++++++++++++++++++++++++-----
 1 file changed, 50 insertions(+), 7 deletions(-)

diff --git a/sound/soc/codecs/wsa883x.c b/sound/soc/codecs/wsa883x.c
index 188363b03b93..ec7a55d88576 100644
--- a/sound/soc/codecs/wsa883x.c
+++ b/sound/soc/codecs/wsa883x.c
@@ -14,6 +14,7 @@
 #include <linux/printk.h>
 #include <linux/regmap.h>
 #include <linux/regulator/consumer.h>
+#include <linux/reset.h>
 #include <linux/slab.h>
 #include <linux/soundwire/sdw.h>
 #include <linux/soundwire/sdw_registers.h>
@@ -468,6 +469,7 @@ struct wsa883x_priv {
 	struct sdw_stream_runtime *sruntime;
 	struct sdw_port_config port_config[WSA883X_MAX_SWR_PORTS];
 	struct gpio_desc *sd_n;
+	struct reset_control *sd_reset;
 	bool port_prepared[WSA883X_MAX_SWR_PORTS];
 	bool port_enable[WSA883X_MAX_SWR_PORTS];
 	int active_ports;
@@ -1546,6 +1548,46 @@ static const struct hwmon_chip_info wsa883x_hwmon_chip_info = {
 	.info	= wsa883x_hwmon_info,
 };
 
+static void wsa883x_reset_assert(void *data)
+{
+	struct wsa883x_priv *wsa883x = data;
+
+	if (wsa883x->sd_reset)
+		reset_control_assert(wsa883x->sd_reset);
+	else
+		gpiod_direction_output(wsa883x->sd_n, 1);
+}
+
+static void wsa883x_reset_deassert(struct wsa883x_priv *wsa883x)
+{
+	if (wsa883x->sd_reset)
+		reset_control_deassert(wsa883x->sd_reset);
+	else
+		gpiod_direction_output(wsa883x->sd_n, 0);
+}
+
+static int wsa883x_get_reset(struct device *dev, struct wsa883x_priv *wsa883x)
+{
+	wsa883x->sd_reset = devm_reset_control_get_optional_shared_deasserted(dev, NULL);
+	if (IS_ERR(wsa883x->sd_reset))
+		return dev_err_probe(dev, PTR_ERR(wsa883x->sd_reset),
+				     "Failed to get reset\n");
+	/*
+	 * if sd_reset: NULL, so use the backwards compatible way for powerdown-gpios,
+	 * which does not handle sharing GPIO properly.
+	 */
+	if (!wsa883x->sd_reset) {
+		wsa883x->sd_n = devm_gpiod_get_optional(dev, "powerdown",
+							GPIOD_FLAGS_BIT_NONEXCLUSIVE |
+							GPIOD_OUT_HIGH);
+		if (IS_ERR(wsa883x->sd_n))
+			return dev_err_probe(dev, PTR_ERR(wsa883x->sd_n),
+					     "Shutdown Control GPIO not found\n");
+	}
+
+	return 0;
+}
+
 static int wsa883x_probe(struct sdw_slave *pdev,
 			 const struct sdw_device_id *id)
 {
@@ -1566,11 +1608,9 @@ static int wsa883x_probe(struct sdw_slave *pdev,
 	if (ret)
 		return dev_err_probe(dev, ret, "Failed to enable vdd regulator\n");
 
-	wsa883x->sd_n = devm_gpiod_get_optional(dev, "powerdown",
-						GPIOD_FLAGS_BIT_NONEXCLUSIVE | GPIOD_OUT_HIGH);
-	if (IS_ERR(wsa883x->sd_n)) {
-		ret = dev_err_probe(dev, PTR_ERR(wsa883x->sd_n),
-				    "Shutdown Control GPIO not found\n");
+	ret = wsa883x_get_reset(dev, wsa883x);
+	if (ret) {
+		dev_dbg(dev, "Failed to get reset powerdown GPIO: %d\n", ret);
 		goto err;
 	}
 
@@ -1595,11 +1635,14 @@ static int wsa883x_probe(struct sdw_slave *pdev,
 	pdev->prop.simple_clk_stop_capable = true;
 	pdev->prop.sink_dpn_prop = wsa_sink_dpn_prop;
 	pdev->prop.scp_int1_mask = SDW_SCP_INT1_BUS_CLASH | SDW_SCP_INT1_PARITY;
-	gpiod_direction_output(wsa883x->sd_n, 0);
+
+	wsa883x_reset_deassert(wsa883x);
+	ret = devm_add_action_or_reset(dev, wsa883x_reset_assert, wsa883x);
+	if (ret)
+		return ret;
 
 	wsa883x->regmap = devm_regmap_init_sdw(pdev, &wsa883x_regmap_config);
 	if (IS_ERR(wsa883x->regmap)) {
-		gpiod_direction_output(wsa883x->sd_n, 1);
 		ret = dev_err_probe(dev, PTR_ERR(wsa883x->regmap),
 				    "regmap_init failed\n");
 		goto err;
-- 
2.34.1

Re: [PATCH v4 2/2] ASoC: codecs: wsa883x: Handle shared reset GPIO for WSA883x speakers

[Srinivas Kandagatla]

On 8/6/25 7:18 PM, Mohammad Rafi Shaik wrote:
> From: Mohammad Rafi Shaik <quic_mohs@quicinc.com>
> 
> On some Qualcomm platforms such as QCS6490-RB3Gen2, the multiple
> WSA8830/WSA8835 speaker amplifiers share a common reset (shutdown) GPIO.
> 
> To handle such scenario, use the reset controller framework and its
> "reset-gpio" driver to handle such case. This allows proper handling
> of all WSA883x speaker amplifiers on QCS6490-RB3Gen2 board.
> 
> Signed-off-by: Mohammad Rafi Shaik <quic_mohs@quicinc.com>
> ---
>  sound/soc/codecs/wsa883x.c | 57 +++++++++++++++++++++++++++++++++-----
>  1 file changed, 50 insertions(+), 7 deletions(-)
> 
> diff --git a/sound/soc/codecs/wsa883x.c b/sound/soc/codecs/wsa883x.c
> index 188363b03b93..ec7a55d88576 100644
> --- a/sound/soc/codecs/wsa883x.c
> +++ b/sound/soc/codecs/wsa883x.c
> @@ -14,6 +14,7 @@
>  #include <linux/printk.h>
>  #include <linux/regmap.h>
>  #include <linux/regulator/consumer.h>
> +#include <linux/reset.h>
>  #include <linux/slab.h>
>  #include <linux/soundwire/sdw.h>
>  #include <linux/soundwire/sdw_registers.h>
> @@ -468,6 +469,7 @@ struct wsa883x_priv {
>  	struct sdw_stream_runtime *sruntime;
>  	struct sdw_port_config port_config[WSA883X_MAX_SWR_PORTS];
>  	struct gpio_desc *sd_n;
> +	struct reset_control *sd_reset;
>  	bool port_prepared[WSA883X_MAX_SWR_PORTS];
>  	bool port_enable[WSA883X_MAX_SWR_PORTS];
>  	int active_ports;
> @@ -1546,6 +1548,46 @@ static const struct hwmon_chip_info wsa883x_hwmon_chip_info = {
>  	.info	= wsa883x_hwmon_info,
>  };
>  
> +static void wsa883x_reset_assert(void *data)
> +{
> +	struct wsa883x_priv *wsa883x = data;
> +
> +	if (wsa883x->sd_reset)
> +		reset_control_assert(wsa883x->sd_reset);
> +	else
> +		gpiod_direction_output(wsa883x->sd_n, 1);
> +}
> +
> +static void wsa883x_reset_deassert(struct wsa883x_priv *wsa883x)
> +{
> +	if (wsa883x->sd_reset)
> +		reset_control_deassert(wsa883x->sd_reset);
> +	else
> +		gpiod_direction_output(wsa883x->sd_n, 0);
> +}
> +
> +static int wsa883x_get_reset(struct device *dev, struct wsa883x_priv *wsa883x)
> +{
> +	wsa883x->sd_reset = devm_reset_control_get_optional_shared_deasserted(dev, NULL);
why deasserted ? we are already doing wsa883x_reset_deassert(wsa883x)
just after calling this.

> +	if (IS_ERR(wsa883x->sd_reset))
> +		return dev_err_probe(dev, PTR_ERR(wsa883x->sd_reset),
> +				     "Failed to get reset\n");
> +	/*
> +	 * if sd_reset: NULL, so use the backwards compatible way for powerdown-gpios,
> +	 * which does not handle sharing GPIO properly.
> +	 */
> +	if (!wsa883x->sd_reset) {
> +		wsa883x->sd_n = devm_gpiod_get_optional(dev, "powerdown",
> +							GPIOD_FLAGS_BIT_NONEXCLUSIVE |
> +							GPIOD_OUT_HIGH);
> +		if (IS_ERR(wsa883x->sd_n))
> +			return dev_err_probe(dev, PTR_ERR(wsa883x->sd_n),
> +					     "Shutdown Control GPIO not found\n");
> +	}
> +
> +	return 0;
> +}
> +
>  static int wsa883x_probe(struct sdw_slave *pdev,
>  			 const struct sdw_device_id *id)
>  {
> @@ -1566,11 +1608,9 @@ static int wsa883x_probe(struct sdw_slave *pdev,
>  	if (ret)
>  		return dev_err_probe(dev, ret, "Failed to enable vdd regulator\n");
>  
> -	wsa883x->sd_n = devm_gpiod_get_optional(dev, "powerdown",
> -						GPIOD_FLAGS_BIT_NONEXCLUSIVE | GPIOD_OUT_HIGH);
> -	if (IS_ERR(wsa883x->sd_n)) {
> -		ret = dev_err_probe(dev, PTR_ERR(wsa883x->sd_n),
> -				    "Shutdown Control GPIO not found\n");
> +	ret = wsa883x_get_reset(dev, wsa883x);
> +	if (ret) {
> +		dev_dbg(dev, "Failed to get reset powerdown GPIO: %d\n", ret);
this is redundant we already have failure messages from wsa883x_get_reset().


--srini
>  		goto err;
>  	}
>  
> @@ -1595,11 +1635,14 @@ static int wsa883x_probe(struct sdw_slave *pdev,
>  	pdev->prop.simple_clk_stop_capable = true;
>  	pdev->prop.sink_dpn_prop = wsa_sink_dpn_prop;
>  	pdev->prop.scp_int1_mask = SDW_SCP_INT1_BUS_CLASH | SDW_SCP_INT1_PARITY;
> -	gpiod_direction_output(wsa883x->sd_n, 0);
> +
> +	wsa883x_reset_deassert(wsa883x);
> +	ret = devm_add_action_or_reset(dev, wsa883x_reset_assert, wsa883x);
> +	if (ret)
> +		return ret;
>  
>  	wsa883x->regmap = devm_regmap_init_sdw(pdev, &wsa883x_regmap_config);
>  	if (IS_ERR(wsa883x->regmap)) {
> -		gpiod_direction_output(wsa883x->sd_n, 1);
>  		ret = dev_err_probe(dev, PTR_ERR(wsa883x->regmap),
>  				    "regmap_init failed\n");
>  		goto err;

Re: [PATCH v4 2/2] ASoC: codecs: wsa883x: Handle shared reset GPIO for WSA883x speakers

[Mohammad Rafi Shaik]

On 8/15/2025 12:07 PM, Srinivas Kandagatla wrote:
> 
> On 8/6/25 7:18 PM, Mohammad Rafi Shaik wrote:
>> From: Mohammad Rafi Shaik <quic_mohs@quicinc.com>
>>
>> On some Qualcomm platforms such as QCS6490-RB3Gen2, the multiple
>> WSA8830/WSA8835 speaker amplifiers share a common reset (shutdown) GPIO.
>>
>> To handle such scenario, use the reset controller framework and its
>> "reset-gpio" driver to handle such case. This allows proper handling
>> of all WSA883x speaker amplifiers on QCS6490-RB3Gen2 board.
>>
>> Signed-off-by: Mohammad Rafi Shaik <quic_mohs@quicinc.com>
>> ---
>>   sound/soc/codecs/wsa883x.c | 57 +++++++++++++++++++++++++++++++++-----
>>   1 file changed, 50 insertions(+), 7 deletions(-)
>>
>> diff --git a/sound/soc/codecs/wsa883x.c b/sound/soc/codecs/wsa883x.c
>> index 188363b03b93..ec7a55d88576 100644
>> --- a/sound/soc/codecs/wsa883x.c
>> +++ b/sound/soc/codecs/wsa883x.c
>> @@ -14,6 +14,7 @@
>>   #include <linux/printk.h>
>>   #include <linux/regmap.h>
>>   #include <linux/regulator/consumer.h>
>> +#include <linux/reset.h>
>>   #include <linux/slab.h>
>>   #include <linux/soundwire/sdw.h>
>>   #include <linux/soundwire/sdw_registers.h>
>> @@ -468,6 +469,7 @@ struct wsa883x_priv {
>>   	struct sdw_stream_runtime *sruntime;
>>   	struct sdw_port_config port_config[WSA883X_MAX_SWR_PORTS];
>>   	struct gpio_desc *sd_n;
>> +	struct reset_control *sd_reset;
>>   	bool port_prepared[WSA883X_MAX_SWR_PORTS];
>>   	bool port_enable[WSA883X_MAX_SWR_PORTS];
>>   	int active_ports;
>> @@ -1546,6 +1548,46 @@ static const struct hwmon_chip_info wsa883x_hwmon_chip_info = {
>>   	.info	= wsa883x_hwmon_info,
>>   };
>>   
>> +static void wsa883x_reset_assert(void *data)
>> +{
>> +	struct wsa883x_priv *wsa883x = data;
>> +
>> +	if (wsa883x->sd_reset)
>> +		reset_control_assert(wsa883x->sd_reset);
>> +	else
>> +		gpiod_direction_output(wsa883x->sd_n, 1);
>> +}
>> +
>> +static void wsa883x_reset_deassert(struct wsa883x_priv *wsa883x)
>> +{
>> +	if (wsa883x->sd_reset)
>> +		reset_control_deassert(wsa883x->sd_reset);
>> +	else
>> +		gpiod_direction_output(wsa883x->sd_n, 0);
>> +}
>> +
>> +static int wsa883x_get_reset(struct device *dev, struct wsa883x_priv *wsa883x)
>> +{
>> +	wsa883x->sd_reset = devm_reset_control_get_optional_shared_deasserted(dev, NULL);
> why deasserted ? we are already doing wsa883x_reset_deassert(wsa883x)
> just after calling this.
> 
ACK,

yes right, we need wsa883x_reset_deassert(wsa883x) to deassert manually 
because same api should handle powerdown-gpios if not reset-gpios.

will use the proper api devm_reset_control_get_optional_shared().


>> +	if (IS_ERR(wsa883x->sd_reset))
>> +		return dev_err_probe(dev, PTR_ERR(wsa883x->sd_reset),
>> +				     "Failed to get reset\n");
>> +	/*
>> +	 * if sd_reset: NULL, so use the backwards compatible way for powerdown-gpios,
>> +	 * which does not handle sharing GPIO properly.
>> +	 */
>> +	if (!wsa883x->sd_reset) {
>> +		wsa883x->sd_n = devm_gpiod_get_optional(dev, "powerdown",
>> +							GPIOD_FLAGS_BIT_NONEXCLUSIVE |
>> +							GPIOD_OUT_HIGH);
>> +		if (IS_ERR(wsa883x->sd_n))
>> +			return dev_err_probe(dev, PTR_ERR(wsa883x->sd_n),
>> +					     "Shutdown Control GPIO not found\n");
>> +	}
>> +
>> +	return 0;
>> +}
>> +
>>   static int wsa883x_probe(struct sdw_slave *pdev,
>>   			 const struct sdw_device_id *id)
>>   {
>> @@ -1566,11 +1608,9 @@ static int wsa883x_probe(struct sdw_slave *pdev,
>>   	if (ret)
>>   		return dev_err_probe(dev, ret, "Failed to enable vdd regulator\n");
>>   
>> -	wsa883x->sd_n = devm_gpiod_get_optional(dev, "powerdown",
>> -						GPIOD_FLAGS_BIT_NONEXCLUSIVE | GPIOD_OUT_HIGH);
>> -	if (IS_ERR(wsa883x->sd_n)) {
>> -		ret = dev_err_probe(dev, PTR_ERR(wsa883x->sd_n),
>> -				    "Shutdown Control GPIO not found\n");
>> +	ret = wsa883x_get_reset(dev, wsa883x);
>> +	if (ret) {
>> +		dev_dbg(dev, "Failed to get reset powerdown GPIO: %d\n", ret);
> this is redundant we already have failure messages from wsa883x_get_reset().
> 

ACK,

Will remove the extra error logs.

Thanks & Regards,
Rafi.
> 
> --srini
>>   		goto err;
>>   	}
>>   
>> @@ -1595,11 +1635,14 @@ static int wsa883x_probe(struct sdw_slave *pdev,
>>   	pdev->prop.simple_clk_stop_capable = true;
>>   	pdev->prop.sink_dpn_prop = wsa_sink_dpn_prop;
>>   	pdev->prop.scp_int1_mask = SDW_SCP_INT1_BUS_CLASH | SDW_SCP_INT1_PARITY;
>> -	gpiod_direction_output(wsa883x->sd_n, 0);
>> +
>> +	wsa883x_reset_deassert(wsa883x);
>> +	ret = devm_add_action_or_reset(dev, wsa883x_reset_assert, wsa883x);
>> +	if (ret)
>> +		return ret;
>>   
>>   	wsa883x->regmap = devm_regmap_init_sdw(pdev, &wsa883x_regmap_config);
>>   	if (IS_ERR(wsa883x->regmap)) {
>> -		gpiod_direction_output(wsa883x->sd_n, 1);
>>   		ret = dev_err_probe(dev, PTR_ERR(wsa883x->regmap),
>>   				    "regmap_init failed\n");
>>   		goto err;
>