linux-kernel - Re: [PATCH v1 7/7] regulator: tps65215: Restructure probe() for multi-PMIC support

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Message-ID: <b3a49df1-372c-46c3-869b-205ddfd18cad@kernel.org>
Date: Sat, 4 Jan 2025 20:47:40 +0200
From: Roger Quadros <rogerq@...nel.org>
To: Shree Ramamoorthy <s-ramamoorthy@...com>, lgirdwood@...il.com,
 broonie@...nel.org, robh@...nel.org, krzk+dt@...nel.org,
 conor+dt@...nel.org, aaro.koskinen@....fi, andreas@...nade.info,
 khilman@...libre.com, tony@...mide.com, jerome.neanne@...libre.com,
 linux-omap@...r.kernel.org, linux-kernel@...r.kernel.org,
 devicetree@...r.kernel.org
Cc: m-leonard@...com, praneeth@...com
Subject: Re: [PATCH v1 7/7] regulator: tps65215: Restructure probe() for
 multi-PMIC support



On 26/12/2024 23:54, Shree Ramamoorthy wrote:
> The probe() function will now utilize the register_regulators() and
> request_irqs() helper functions defined in the previous patch. Probe() will
> cycle through common (overlapping) regulators and irqs first, and then
> handle device-specific resources identified using the chip_data struct.
> 
> Signed-off-by: Shree Ramamoorthy <s-ramamoorthy@...com>
> ---
>  drivers/regulator/tps65219-regulator.c | 66 +++++++++++---------------
>  1 file changed, 27 insertions(+), 39 deletions(-)
> 
> diff --git a/drivers/regulator/tps65219-regulator.c b/drivers/regulator/tps65219-regulator.c
> index 8469ee89802c..b27888fd1fa8 100644
> --- a/drivers/regulator/tps65219-regulator.c
> +++ b/drivers/regulator/tps65219-regulator.c
> @@ -413,54 +413,42 @@ static int tps65219_request_irqs(struct tps65219_regulator_irq_type *irq_types,
>  static int tps65219_regulator_probe(struct platform_device *pdev)
>  {
>  	struct tps65219 *tps = dev_get_drvdata(pdev->dev.parent);
> -	struct regulator_dev *rdev;
>  	struct regulator_config config = { };
> -	int i;
>  	int error;
> -	int irq;
>  	struct tps65219_regulator_irq_data *irq_data;
> -	struct tps65219_regulator_irq_type *irq_type;
> +	struct chip_data *pmic;

reverse xmas tree.

>  
> -	config.dev = tps->dev;
> -	config.driver_data = tps;
> -	config.regmap = tps->regmap;
>  
> -	for (i = 0; i < ARRAY_SIZE(regulators); i++) {
> -		rdev = devm_regulator_register(&pdev->dev, &regulators[i],
> -					       &config);
> -		if (IS_ERR(rdev))
> -			return dev_err_probe(tps->dev, PTR_ERR(rdev),
> -					"Failed to register %s regulator\n",
> -					regulators[i].name);
> -	}
> -
> -	irq_data = devm_kmalloc(tps->dev,
> -				ARRAY_SIZE(tps65219_regulator_irq_types) *
> -				sizeof(struct tps65219_regulator_irq_data),
> -				GFP_KERNEL);
> -	if (!irq_data)
> -		return -ENOMEM;
> -
> -	for (i = 0; i < ARRAY_SIZE(tps65219_regulator_irq_types); ++i) {
> -		irq_type = &tps65219_regulator_irq_types[i];
> +	enum pmic_id chip = platform_get_device_id(pdev)->driver_data;
>  
> -		irq = platform_get_irq_byname(pdev, irq_type->irq_name);
> -		if (irq < 0)
> -			return -EINVAL;

need a new line after declarations.

> +	pmic = &chip_info_table[chip];
>  
> -		irq_data[i].dev = tps->dev;
> -		irq_data[i].type = irq_type;
> +	config.dev = tps->dev;
> +	config.driver_data = tps;
> +	config.regmap = tps->regmap;
>  
> -		error = devm_request_threaded_irq(tps->dev, irq, NULL,
> -						  tps65219_regulator_irq_handler,
> -						  IRQF_ONESHOT,
> -						  irq_type->irq_name,
> -						  &irq_data[i]);
> -		if (error) {
> -			dev_err(tps->dev, "failed to request %s IRQ %d: %d\n",
> -				irq_type->irq_name, irq, error);
> +	error = tps65219_register_regulators(pmic->common_rdesc, tps,
> +						&pdev->dev, config, pmic->common_rdesc_size);
> +	if (error)

maybe you could use goto and do any cleanup
and in the end use dev_err_probe().

> +		return error;
> +
> +	error = tps65219_register_regulators(pmic->rdesc, tps, &pdev->dev,
> +						config, pmic->rdesc_size);
> +	if (error)
> +		return error;
> +
> +	irq_data = devm_kmalloc(tps->dev, pmic->common_irq_size, GFP_KERNEL);
> +	error = tps65219_request_irqs(pmic->common_irq_types, tps, pdev,
> +					irq_data, pmic->common_irq_size);
> +	if (error)
> +		return error;
> +
> +	if (chip == TPS65219) {
> +		irq_data = devm_kmalloc(tps->dev, pmic->dev_irq_size, GFP_KERNEL);
> +		error = tps65219_request_irqs(pmic->irq_types, tps, pdev,
> +						irq_data, pmic->dev_irq_size);
> +		if (error)
>  			return error;
> -		}
>  	}
>  
>  	return 0;

-- 
cheers,
-roger