diff mbox series

[v11,4/7] pinctrl: qcom: Update lpi pin group custiom functions with framework generic functions

Message ID 1647359413-31662-5-git-send-email-quic_srivasam@quicinc.com
State New
Headers show
Series Add pin control support for lpass sc7280 | expand

Commit Message

Srinivasa Rao Mandadapu March 15, 2022, 3:50 p.m. UTC
Update custom pin group structure members with framework generic group_desc structure
and replace the driver's custom pinctrl_ops with framework provided generic pin control
group functions to avoid redundant code written in lpass lpi driver.

Signed-off-by: Srinivasa Rao Mandadapu <quic_srivasam@quicinc.com>
Co-developed-by: Venkata Prasad Potturu <quic_potturu@quicinc.com>
Signed-off-by: Venkata Prasad Potturu <quic_potturu@quicinc.com>
---
 drivers/pinctrl/qcom/Kconfig             |  1 +
 drivers/pinctrl/qcom/pinctrl-lpass-lpi.c | 98 +++++++++++++++-----------------
 2 files changed, 48 insertions(+), 51 deletions(-)

Comments

Bjorn Andersson March 15, 2022, 4:45 p.m. UTC | #1
On Tue 15 Mar 10:50 CDT 2022, Srinivasa Rao Mandadapu wrote:

> Update custom pin group structure members with framework generic group_desc structure
> and replace the driver's custom pinctrl_ops with framework provided generic pin control
> group functions to avoid redundant code written in lpass lpi driver.
> 
> Signed-off-by: Srinivasa Rao Mandadapu <quic_srivasam@quicinc.com>
> Co-developed-by: Venkata Prasad Potturu <quic_potturu@quicinc.com>
> Signed-off-by: Venkata Prasad Potturu <quic_potturu@quicinc.com>
> ---
>  drivers/pinctrl/qcom/Kconfig             |  1 +
>  drivers/pinctrl/qcom/pinctrl-lpass-lpi.c | 98 +++++++++++++++-----------------
>  2 files changed, 48 insertions(+), 51 deletions(-)
> 
> diff --git a/drivers/pinctrl/qcom/Kconfig b/drivers/pinctrl/qcom/Kconfig
> index ca6f68a..31c4aa6 100644
> --- a/drivers/pinctrl/qcom/Kconfig
> +++ b/drivers/pinctrl/qcom/Kconfig
> @@ -351,6 +351,7 @@ config PINCTRL_LPASS_LPI
>  	select PINMUX
>  	select PINCONF
>  	select GENERIC_PINCONF
> +	select GENERIC_PINCTRL_GROUPS
>  	depends on GPIOLIB
>  	help
>  	  This is the pinctrl, pinmux, pinconf and gpiolib driver for the
> diff --git a/drivers/pinctrl/qcom/pinctrl-lpass-lpi.c b/drivers/pinctrl/qcom/pinctrl-lpass-lpi.c
> index 3c15f80..5e27a38 100644
> --- a/drivers/pinctrl/qcom/pinctrl-lpass-lpi.c
> +++ b/drivers/pinctrl/qcom/pinctrl-lpass-lpi.c
> @@ -51,11 +51,11 @@
>  
>  #define LPI_PINGROUP(id, soff, f1, f2, f3, f4)		\
>  	{						\
> -		.name = "gpio" #id,			\
> -		.pins = gpio##id##_pins,		\
> +		.group.name = "gpio" #id,			\
> +		.group.pins = gpio##id##_pins,		\
>  		.pin = id,				\
>  		.slew_offset = soff,			\
> -		.npins = ARRAY_SIZE(gpio##id##_pins),	\
> +		.group.num_pins = ARRAY_SIZE(gpio##id##_pins),	\
>  		.funcs = (int[]){			\
>  			LPI_MUX_gpio,			\
>  			LPI_MUX_##f1,			\
> @@ -67,9 +67,7 @@
>  	}
>  
>  struct lpi_pingroup {
> -	const char *name;
> -	const unsigned int *pins;
> -	unsigned int npins;
> +	struct group_desc group;
>  	unsigned int pin;
>  	/* Bit offset in slew register for SoundWire pins only */
>  	int slew_offset;
> @@ -150,20 +148,20 @@ enum sm8250_lpi_functions {
>  	LPI_MUX__,
>  };
>  
> -static const unsigned int gpio0_pins[] = { 0 };
> -static const unsigned int gpio1_pins[] = { 1 };
> -static const unsigned int gpio2_pins[] = { 2 };
> -static const unsigned int gpio3_pins[] = { 3 };
> -static const unsigned int gpio4_pins[] = { 4 };
> -static const unsigned int gpio5_pins[] = { 5 };
> -static const unsigned int gpio6_pins[] = { 6 };
> -static const unsigned int gpio7_pins[] = { 7 };
> -static const unsigned int gpio8_pins[] = { 8 };
> -static const unsigned int gpio9_pins[] = { 9 };
> -static const unsigned int gpio10_pins[] = { 10 };
> -static const unsigned int gpio11_pins[] = { 11 };
> -static const unsigned int gpio12_pins[] = { 12 };
> -static const unsigned int gpio13_pins[] = { 13 };
> +static int gpio0_pins[] = { 0 };
> +static int gpio1_pins[] = { 1 };
> +static int gpio2_pins[] = { 2 };
> +static int gpio3_pins[] = { 3 };
> +static int gpio4_pins[] = { 4 };
> +static int gpio5_pins[] = { 5 };
> +static int gpio6_pins[] = { 6 };
> +static int gpio7_pins[] = { 7 };
> +static int gpio8_pins[] = { 8 };
> +static int gpio9_pins[] = { 9 };
> +static int gpio10_pins[] = { 10 };
> +static int gpio11_pins[] = { 11 };
> +static int gpio12_pins[] = { 12 };
> +static int gpio13_pins[] = { 13 };
>  static const char * const swr_tx_clk_groups[] = { "gpio0" };
>  static const char * const swr_tx_data_groups[] = { "gpio1", "gpio2", "gpio5" };
>  static const char * const swr_rx_clk_groups[] = { "gpio3" };
> @@ -250,38 +248,10 @@ static int lpi_gpio_write(struct lpi_pinctrl *state, unsigned int pin,
>  	return 0;
>  }
>  
> -static int lpi_gpio_get_groups_count(struct pinctrl_dev *pctldev)
> -{
> -	struct lpi_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
> -
> -	return pctrl->data->ngroups;
> -}
> -
> -static const char *lpi_gpio_get_group_name(struct pinctrl_dev *pctldev,
> -					   unsigned int group)
> -{
> -	struct lpi_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
> -
> -	return pctrl->data->groups[group].name;
> -}
> -
> -static int lpi_gpio_get_group_pins(struct pinctrl_dev *pctldev,
> -				   unsigned int group,
> -				   const unsigned int **pins,
> -				   unsigned int *num_pins)
> -{
> -	struct lpi_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
> -
> -	*pins = pctrl->data->groups[group].pins;
> -	*num_pins = pctrl->data->groups[group].npins;
> -
> -	return 0;
> -}
> -
>  static const struct pinctrl_ops lpi_gpio_pinctrl_ops = {
> -	.get_groups_count	= lpi_gpio_get_groups_count,
> -	.get_group_name		= lpi_gpio_get_group_name,
> -	.get_group_pins		= lpi_gpio_get_group_pins,
> +	.get_groups_count	= pinctrl_generic_get_group_count,
> +	.get_group_name		= pinctrl_generic_get_group_name,
> +	.get_group_pins		= pinctrl_generic_get_group_pins,
>  	.dt_node_to_map		= pinconf_generic_dt_node_to_map_group,
>  	.dt_free_map		= pinctrl_utils_free_map,
>  };
> @@ -582,6 +552,28 @@ static const struct gpio_chip lpi_gpio_template = {
>  	.dbg_show		= lpi_gpio_dbg_show,
>  };
>  
> +static int lpi_build_pin_desc_groups(struct lpi_pinctrl *pctrl)
> +{
> +	struct group_desc *lpi_groups;
> +	int i;
> +
> +	lpi_groups = devm_kcalloc(pctrl->dev, pctrl->data->npins,
> +					 sizeof(*lpi_groups), GFP_KERNEL);
> +	if (!lpi_groups)
> +		return -ENOMEM;
> +
> +	for (i = 0; i < pctrl->data->npins; i++) {
> +		const struct pinctrl_pin_desc *pin_info = pctrl->desc.pins + i;
> +		struct group_desc *group = lpi_groups + i;
> +
> +		group->name = pin_info->name;
> +		group->pins = (int *)&pin_info->number;
> +		pinctrl_generic_add_group(pctrl->ctrl, group->name, group->pins, 1, NULL);

I've not used this generic interface before, but I believe you need to
pair your add with pinctrl_generic_remove_group(), both in error paths
and driver remove.

Makes me wonder about the usefulness of this, as you will end up with
a bit more code than you remove and you have the additional heap
allocation. Feels like I'm missing something...

> +	}
> +
> +	return 0;
> +}
> +
>  static int lpi_pinctrl_probe(struct platform_device *pdev)
>  {
>  	const struct lpi_pinctrl_variant_data *data;
> @@ -647,6 +639,10 @@ static int lpi_pinctrl_probe(struct platform_device *pdev)
>  		goto err_pinctrl;
>  	}
>  
> +	ret = lpi_build_pin_desc_groups(pctrl);
> +	if (ret)
> +		return ret;

A few lines up the code does error handling by goto err_pinctrl, you
should do the same.

Regards,
Bjorn

> +
>  	ret = devm_gpiochip_add_data(dev, &pctrl->chip, pctrl);
>  	if (ret) {
>  		dev_err(pctrl->dev, "can't add gpio chip\n");
> -- 
> 2.7.4
>
Srinivasa Rao Mandadapu March 16, 2022, 3:52 p.m. UTC | #2
On 3/15/2022 10:15 PM, Bjorn Andersson wrote:
Thanks for your time Bjorn!!!
> On Tue 15 Mar 10:50 CDT 2022, Srinivasa Rao Mandadapu wrote:
>
>> Update custom pin group structure members with framework generic group_desc structure
>> and replace the driver's custom pinctrl_ops with framework provided generic pin control
>> group functions to avoid redundant code written in lpass lpi driver.
>>
>> Signed-off-by: Srinivasa Rao Mandadapu <quic_srivasam@quicinc.com>
>> Co-developed-by: Venkata Prasad Potturu <quic_potturu@quicinc.com>
>> Signed-off-by: Venkata Prasad Potturu <quic_potturu@quicinc.com>
>> ---
>>   drivers/pinctrl/qcom/Kconfig             |  1 +
>>   drivers/pinctrl/qcom/pinctrl-lpass-lpi.c | 98 +++++++++++++++-----------------
>>   2 files changed, 48 insertions(+), 51 deletions(-)
>>
>> diff --git a/drivers/pinctrl/qcom/Kconfig b/drivers/pinctrl/qcom/Kconfig
>> index ca6f68a..31c4aa6 100644
>> --- a/drivers/pinctrl/qcom/Kconfig
>> +++ b/drivers/pinctrl/qcom/Kconfig
>> @@ -351,6 +351,7 @@ config PINCTRL_LPASS_LPI
>>   	select PINMUX
>>   	select PINCONF
>>   	select GENERIC_PINCONF
>> +	select GENERIC_PINCTRL_GROUPS
>>   	depends on GPIOLIB
>>   	help
>>   	  This is the pinctrl, pinmux, pinconf and gpiolib driver for the
>> diff --git a/drivers/pinctrl/qcom/pinctrl-lpass-lpi.c b/drivers/pinctrl/qcom/pinctrl-lpass-lpi.c
>> index 3c15f80..5e27a38 100644
>> --- a/drivers/pinctrl/qcom/pinctrl-lpass-lpi.c
>> +++ b/drivers/pinctrl/qcom/pinctrl-lpass-lpi.c
>> @@ -51,11 +51,11 @@
>>   
>>   #define LPI_PINGROUP(id, soff, f1, f2, f3, f4)		\
>>   	{						\
>> -		.name = "gpio" #id,			\
>> -		.pins = gpio##id##_pins,		\
>> +		.group.name = "gpio" #id,			\
>> +		.group.pins = gpio##id##_pins,		\
>>   		.pin = id,				\
>>   		.slew_offset = soff,			\
>> -		.npins = ARRAY_SIZE(gpio##id##_pins),	\
>> +		.group.num_pins = ARRAY_SIZE(gpio##id##_pins),	\
>>   		.funcs = (int[]){			\
>>   			LPI_MUX_gpio,			\
>>   			LPI_MUX_##f1,			\
>> @@ -67,9 +67,7 @@
>>   	}
>>   
>>   struct lpi_pingroup {
>> -	const char *name;
>> -	const unsigned int *pins;
>> -	unsigned int npins;
>> +	struct group_desc group;
>>   	unsigned int pin;
>>   	/* Bit offset in slew register for SoundWire pins only */
>>   	int slew_offset;
>> @@ -150,20 +148,20 @@ enum sm8250_lpi_functions {
>>   	LPI_MUX__,
>>   };
>>   
>> -static const unsigned int gpio0_pins[] = { 0 };
>> -static const unsigned int gpio1_pins[] = { 1 };
>> -static const unsigned int gpio2_pins[] = { 2 };
>> -static const unsigned int gpio3_pins[] = { 3 };
>> -static const unsigned int gpio4_pins[] = { 4 };
>> -static const unsigned int gpio5_pins[] = { 5 };
>> -static const unsigned int gpio6_pins[] = { 6 };
>> -static const unsigned int gpio7_pins[] = { 7 };
>> -static const unsigned int gpio8_pins[] = { 8 };
>> -static const unsigned int gpio9_pins[] = { 9 };
>> -static const unsigned int gpio10_pins[] = { 10 };
>> -static const unsigned int gpio11_pins[] = { 11 };
>> -static const unsigned int gpio12_pins[] = { 12 };
>> -static const unsigned int gpio13_pins[] = { 13 };
>> +static int gpio0_pins[] = { 0 };
>> +static int gpio1_pins[] = { 1 };
>> +static int gpio2_pins[] = { 2 };
>> +static int gpio3_pins[] = { 3 };
>> +static int gpio4_pins[] = { 4 };
>> +static int gpio5_pins[] = { 5 };
>> +static int gpio6_pins[] = { 6 };
>> +static int gpio7_pins[] = { 7 };
>> +static int gpio8_pins[] = { 8 };
>> +static int gpio9_pins[] = { 9 };
>> +static int gpio10_pins[] = { 10 };
>> +static int gpio11_pins[] = { 11 };
>> +static int gpio12_pins[] = { 12 };
>> +static int gpio13_pins[] = { 13 };
>>   static const char * const swr_tx_clk_groups[] = { "gpio0" };
>>   static const char * const swr_tx_data_groups[] = { "gpio1", "gpio2", "gpio5" };
>>   static const char * const swr_rx_clk_groups[] = { "gpio3" };
>> @@ -250,38 +248,10 @@ static int lpi_gpio_write(struct lpi_pinctrl *state, unsigned int pin,
>>   	return 0;
>>   }
>>   
>> -static int lpi_gpio_get_groups_count(struct pinctrl_dev *pctldev)
>> -{
>> -	struct lpi_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
>> -
>> -	return pctrl->data->ngroups;
>> -}
>> -
>> -static const char *lpi_gpio_get_group_name(struct pinctrl_dev *pctldev,
>> -					   unsigned int group)
>> -{
>> -	struct lpi_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
>> -
>> -	return pctrl->data->groups[group].name;
>> -}
>> -
>> -static int lpi_gpio_get_group_pins(struct pinctrl_dev *pctldev,
>> -				   unsigned int group,
>> -				   const unsigned int **pins,
>> -				   unsigned int *num_pins)
>> -{
>> -	struct lpi_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
>> -
>> -	*pins = pctrl->data->groups[group].pins;
>> -	*num_pins = pctrl->data->groups[group].npins;
>> -
>> -	return 0;
>> -}
>> -
>>   static const struct pinctrl_ops lpi_gpio_pinctrl_ops = {
>> -	.get_groups_count	= lpi_gpio_get_groups_count,
>> -	.get_group_name		= lpi_gpio_get_group_name,
>> -	.get_group_pins		= lpi_gpio_get_group_pins,
>> +	.get_groups_count	= pinctrl_generic_get_group_count,
>> +	.get_group_name		= pinctrl_generic_get_group_name,
>> +	.get_group_pins		= pinctrl_generic_get_group_pins,
>>   	.dt_node_to_map		= pinconf_generic_dt_node_to_map_group,
>>   	.dt_free_map		= pinctrl_utils_free_map,
>>   };
>> @@ -582,6 +552,28 @@ static const struct gpio_chip lpi_gpio_template = {
>>   	.dbg_show		= lpi_gpio_dbg_show,
>>   };
>>   
>> +static int lpi_build_pin_desc_groups(struct lpi_pinctrl *pctrl)
>> +{
>> +	struct group_desc *lpi_groups;
>> +	int i;
>> +
>> +	lpi_groups = devm_kcalloc(pctrl->dev, pctrl->data->npins,
>> +					 sizeof(*lpi_groups), GFP_KERNEL);
>> +	if (!lpi_groups)
>> +		return -ENOMEM;
>> +
>> +	for (i = 0; i < pctrl->data->npins; i++) {
>> +		const struct pinctrl_pin_desc *pin_info = pctrl->desc.pins + i;
>> +		struct group_desc *group = lpi_groups + i;
>> +
>> +		group->name = pin_info->name;
>> +		group->pins = (int *)&pin_info->number;
>> +		pinctrl_generic_add_group(pctrl->ctrl, group->name, group->pins, 1, NULL);
> I've not used this generic interface before, but I believe you need to
> pair your add with pinctrl_generic_remove_group(), both in error paths
> and driver remove.
Okay. Will add pinctrl_generic_remove_group() accordingly.
>
> Makes me wonder about the usefulness of this, as you will end up with
> a bit more code than you remove and you have the additional heap
> allocation. Feels like I'm missing something...
Here Heap allocation can be avoided.  will do accordingly and re post.
>
>> +	}
>> +
>> +	return 0;
>> +}
>> +
>>   static int lpi_pinctrl_probe(struct platform_device *pdev)
>>   {
>>   	const struct lpi_pinctrl_variant_data *data;
>> @@ -647,6 +639,10 @@ static int lpi_pinctrl_probe(struct platform_device *pdev)
>>   		goto err_pinctrl;
>>   	}
>>   
>> +	ret = lpi_build_pin_desc_groups(pctrl);
>> +	if (ret)
>> +		return ret;
> A few lines up the code does error handling by goto err_pinctrl, you
> should do the same.
Okay. will update accordingly.
>
> Regards,
> Bjorn
>
>> +
>>   	ret = devm_gpiochip_add_data(dev, &pctrl->chip, pctrl);
>>   	if (ret) {
>>   		dev_err(pctrl->dev, "can't add gpio chip\n");
>> -- 
>> 2.7.4
>>
diff mbox series

Patch

diff --git a/drivers/pinctrl/qcom/Kconfig b/drivers/pinctrl/qcom/Kconfig
index ca6f68a..31c4aa6 100644
--- a/drivers/pinctrl/qcom/Kconfig
+++ b/drivers/pinctrl/qcom/Kconfig
@@ -351,6 +351,7 @@  config PINCTRL_LPASS_LPI
 	select PINMUX
 	select PINCONF
 	select GENERIC_PINCONF
+	select GENERIC_PINCTRL_GROUPS
 	depends on GPIOLIB
 	help
 	  This is the pinctrl, pinmux, pinconf and gpiolib driver for the
diff --git a/drivers/pinctrl/qcom/pinctrl-lpass-lpi.c b/drivers/pinctrl/qcom/pinctrl-lpass-lpi.c
index 3c15f80..5e27a38 100644
--- a/drivers/pinctrl/qcom/pinctrl-lpass-lpi.c
+++ b/drivers/pinctrl/qcom/pinctrl-lpass-lpi.c
@@ -51,11 +51,11 @@ 
 
 #define LPI_PINGROUP(id, soff, f1, f2, f3, f4)		\
 	{						\
-		.name = "gpio" #id,			\
-		.pins = gpio##id##_pins,		\
+		.group.name = "gpio" #id,			\
+		.group.pins = gpio##id##_pins,		\
 		.pin = id,				\
 		.slew_offset = soff,			\
-		.npins = ARRAY_SIZE(gpio##id##_pins),	\
+		.group.num_pins = ARRAY_SIZE(gpio##id##_pins),	\
 		.funcs = (int[]){			\
 			LPI_MUX_gpio,			\
 			LPI_MUX_##f1,			\
@@ -67,9 +67,7 @@ 
 	}
 
 struct lpi_pingroup {
-	const char *name;
-	const unsigned int *pins;
-	unsigned int npins;
+	struct group_desc group;
 	unsigned int pin;
 	/* Bit offset in slew register for SoundWire pins only */
 	int slew_offset;
@@ -150,20 +148,20 @@  enum sm8250_lpi_functions {
 	LPI_MUX__,
 };
 
-static const unsigned int gpio0_pins[] = { 0 };
-static const unsigned int gpio1_pins[] = { 1 };
-static const unsigned int gpio2_pins[] = { 2 };
-static const unsigned int gpio3_pins[] = { 3 };
-static const unsigned int gpio4_pins[] = { 4 };
-static const unsigned int gpio5_pins[] = { 5 };
-static const unsigned int gpio6_pins[] = { 6 };
-static const unsigned int gpio7_pins[] = { 7 };
-static const unsigned int gpio8_pins[] = { 8 };
-static const unsigned int gpio9_pins[] = { 9 };
-static const unsigned int gpio10_pins[] = { 10 };
-static const unsigned int gpio11_pins[] = { 11 };
-static const unsigned int gpio12_pins[] = { 12 };
-static const unsigned int gpio13_pins[] = { 13 };
+static int gpio0_pins[] = { 0 };
+static int gpio1_pins[] = { 1 };
+static int gpio2_pins[] = { 2 };
+static int gpio3_pins[] = { 3 };
+static int gpio4_pins[] = { 4 };
+static int gpio5_pins[] = { 5 };
+static int gpio6_pins[] = { 6 };
+static int gpio7_pins[] = { 7 };
+static int gpio8_pins[] = { 8 };
+static int gpio9_pins[] = { 9 };
+static int gpio10_pins[] = { 10 };
+static int gpio11_pins[] = { 11 };
+static int gpio12_pins[] = { 12 };
+static int gpio13_pins[] = { 13 };
 static const char * const swr_tx_clk_groups[] = { "gpio0" };
 static const char * const swr_tx_data_groups[] = { "gpio1", "gpio2", "gpio5" };
 static const char * const swr_rx_clk_groups[] = { "gpio3" };
@@ -250,38 +248,10 @@  static int lpi_gpio_write(struct lpi_pinctrl *state, unsigned int pin,
 	return 0;
 }
 
-static int lpi_gpio_get_groups_count(struct pinctrl_dev *pctldev)
-{
-	struct lpi_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
-
-	return pctrl->data->ngroups;
-}
-
-static const char *lpi_gpio_get_group_name(struct pinctrl_dev *pctldev,
-					   unsigned int group)
-{
-	struct lpi_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
-
-	return pctrl->data->groups[group].name;
-}
-
-static int lpi_gpio_get_group_pins(struct pinctrl_dev *pctldev,
-				   unsigned int group,
-				   const unsigned int **pins,
-				   unsigned int *num_pins)
-{
-	struct lpi_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
-
-	*pins = pctrl->data->groups[group].pins;
-	*num_pins = pctrl->data->groups[group].npins;
-
-	return 0;
-}
-
 static const struct pinctrl_ops lpi_gpio_pinctrl_ops = {
-	.get_groups_count	= lpi_gpio_get_groups_count,
-	.get_group_name		= lpi_gpio_get_group_name,
-	.get_group_pins		= lpi_gpio_get_group_pins,
+	.get_groups_count	= pinctrl_generic_get_group_count,
+	.get_group_name		= pinctrl_generic_get_group_name,
+	.get_group_pins		= pinctrl_generic_get_group_pins,
 	.dt_node_to_map		= pinconf_generic_dt_node_to_map_group,
 	.dt_free_map		= pinctrl_utils_free_map,
 };
@@ -582,6 +552,28 @@  static const struct gpio_chip lpi_gpio_template = {
 	.dbg_show		= lpi_gpio_dbg_show,
 };
 
+static int lpi_build_pin_desc_groups(struct lpi_pinctrl *pctrl)
+{
+	struct group_desc *lpi_groups;
+	int i;
+
+	lpi_groups = devm_kcalloc(pctrl->dev, pctrl->data->npins,
+					 sizeof(*lpi_groups), GFP_KERNEL);
+	if (!lpi_groups)
+		return -ENOMEM;
+
+	for (i = 0; i < pctrl->data->npins; i++) {
+		const struct pinctrl_pin_desc *pin_info = pctrl->desc.pins + i;
+		struct group_desc *group = lpi_groups + i;
+
+		group->name = pin_info->name;
+		group->pins = (int *)&pin_info->number;
+		pinctrl_generic_add_group(pctrl->ctrl, group->name, group->pins, 1, NULL);
+	}
+
+	return 0;
+}
+
 static int lpi_pinctrl_probe(struct platform_device *pdev)
 {
 	const struct lpi_pinctrl_variant_data *data;
@@ -647,6 +639,10 @@  static int lpi_pinctrl_probe(struct platform_device *pdev)
 		goto err_pinctrl;
 	}
 
+	ret = lpi_build_pin_desc_groups(pctrl);
+	if (ret)
+		return ret;
+
 	ret = devm_gpiochip_add_data(dev, &pctrl->chip, pctrl);
 	if (ret) {
 		dev_err(pctrl->dev, "can't add gpio chip\n");