linux-kernel - Re: [PATCH v1 3/3] drivers: misc: Add support for TPS65224 pfsm driver

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Date:   Fri, 27 Oct 2023 10:05:18 +0200
From:   Krzysztof Kozlowski <krzk@...nel.org>
To:     Gairuboina Sirisha <sirisha.gairuboina@...s.com>,
        linux-kernel@...r.kernel.org
Cc:     lee@...nel.org, arnd@...db.de, gregkh@...uxfoundation.org
Subject: Re: [PATCH v1 3/3] drivers: misc: Add support for TPS65224 pfsm
 driver

On 26/10/2023 15:32, Gairuboina Sirisha wrote:
> From: Gairuboina Sirisha <sirisha.gairuboina@...s.com>
> 
> Added support for pmic nvm set FSM_I2C_TRIGGER functions driver,
> state control driver, Makefile and Kconfig
> 

...

> +
> +static int tps65224_pfsm_probe(struct platform_device *pdev)
> +{
> +	struct tps65224_pfsm *pfsm;
> +	struct tps65224 *tps = dev_get_drvdata(pdev->dev.parent);
> +	struct device *dev = &pdev->dev;
> +	int irq;
> +	int ret;
> +	int i;
> +
> +	pfsm = devm_kzalloc(dev, sizeof(struct tps65224_pfsm), GFP_KERNEL);

sizeof(*)

> +	if (!pfsm)
> +		return -ENOMEM;
> +
> +	pfsm->regmap = tps->regmap;
> +
> +	pfsm->miscdev.minor = MISC_DYNAMIC_MINOR;
> +	pfsm->miscdev.name = devm_kasprintf(dev, GFP_KERNEL, "pfsm-%ld-0x%02x",
> +						tps->chip_id, tps->reg);
> +	pfsm->miscdev.fops = &tps65224_pfsm_fops;
> +	pfsm->miscdev.parent = dev->parent;
> +
> +	for (i = 0 ; i < pdev->num_resources ; i++) {
> +		irq = platform_get_irq_byname(pdev, pdev->resource[i].name);
> +		if (irq < 0)
> +			return dev_err_probe(dev, irq, "Failed to get %s irq\n",
> +						 pdev->resource[i].name);
> +
> +		ret = devm_request_threaded_irq(dev, irq, NULL,
> +						tps65224_pfsm_isr, IRQF_ONESHOT,
> +						pdev->resource[i].name, pdev);
> +		if (ret)
> +			return dev_err_probe(dev, ret, "Failed to request irq\n");
> +	}
> +
> +	platform_set_drvdata(pdev, pfsm);
> +
> +	return misc_register(&pfsm->miscdev);
> +}
> +
> +static void tps65224_pfsm_remove(struct platform_device *pdev)
> +{
> +	struct tps65224_pfsm *pfsm = platform_get_drvdata(pdev);
> +
> +	misc_deregister(&pfsm->miscdev);
> +}
> +
> +static struct platform_driver tps65224_pfsm_driver = {
> +	.driver	= {
> +		.name = "tps65224-pfsm",
> +	},
> +	.probe = tps65224_pfsm_probe,
> +	.remove_new = tps65224_pfsm_remove,
> +};
> +
> +module_platform_driver(tps65224_pfsm_driver);
> +
> +MODULE_ALIAS("platform:tps65224-pfsm");

You should not need MODULE_ALIAS() in normal cases. If you need it,
usually it means your device ID table is wrong.


> +MODULE_AUTHOR("Gairuboina Sirisha <sirisha.gairuboina@...s.com>");
> +MODULE_DESCRIPTION("TPS65224 Pre-configurable Finite State Machine Driver");
> +MODULE_LICENSE("GPL");
> diff --git a/include/uapi/linux/tps65224_pfsm.h b/include/uapi/linux/tps65224_pfsm.h
> new file mode 100644
> index 000000000000..c0a135903b5d
> --- /dev/null
> +++ b/include/uapi/linux/tps65224_pfsm.h
> @@ -0,0 +1,36 @@
> +/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
> +/*
> + * Userspace ABI for TPS65224 PMIC Pre-configurable Finite State Machine
> + *
> + * Copyright (C) 2015 Texas Instruments Incorporated - https://www.ti.com/
> + */

Best regards,
Krzysztof