linux-kernel - Re: [PATCH v6 02/12] mfd: Add max7360 support

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Message-ID: <aAFFh8dvgQDJMyOh@smile.fi.intel.com>
Date: Thu, 17 Apr 2025 21:16:39 +0300
From: Andy Shevchenko <andriy.shevchenko@...el.com>
To: mathieu.dubois-briand@...tlin.com
Cc: Lee Jones <lee@...nel.org>, Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Kamel Bouhara <kamel.bouhara@...tlin.com>,
	Linus Walleij <linus.walleij@...aro.org>,
	Bartosz Golaszewski <brgl@...ev.pl>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Uwe Kleine-König <ukleinek@...nel.org>,
	Michael Walle <mwalle@...nel.org>, Mark Brown <broonie@...nel.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	"Rafael J. Wysocki" <rafael@...nel.org>,
	Danilo Krummrich <dakr@...nel.org>, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-gpio@...r.kernel.org,
	linux-input@...r.kernel.org, linux-pwm@...r.kernel.org,
	Grégory Clement <gregory.clement@...tlin.com>,
	Thomas Petazzoni <thomas.petazzoni@...tlin.com>
Subject: Re: [PATCH v6 02/12] mfd: Add max7360 support

On Wed, Apr 09, 2025 at 04:55:49PM +0200, mathieu.dubois-briand@...tlin.com wrote:
> From: Kamel Bouhara <kamel.bouhara@...tlin.com>
> 
> Add core driver to support MAX7360 i2c chip, multi function device
> with keypad, GPIO, PWM, GPO and rotary encoder submodules.

...

> +static int max7360_probe(struct i2c_client *client)
> +{
> +	struct device *dev = &client->dev;
> +	struct regmap *regmap;
> +	int ret;
> +
> +	regmap = devm_regmap_init_i2c(client, &max7360_regmap_config);
> +	if (IS_ERR(regmap))
> +		return dev_err_probe(dev, PTR_ERR(regmap), "Failed to initialise regmap\n");

> +	i2c_set_clientdata(client, regmap);

Is it used somehow? In children?

> +	ret = max7360_reset(regmap);
> +	if (ret)
> +		return dev_err_probe(dev, ret, "Failed to reset device\n");
> +
> +	/* Get the device out of shutdown mode. */
> +	ret = regmap_write_bits(regmap, MAX7360_REG_GPIOCFG,
> +				MAX7360_GPIO_CFG_GPIO_EN,
> +				MAX7360_GPIO_CFG_GPIO_EN);
> +	if (ret)
> +		return dev_err_probe(dev, ret, "Failed to enable GPIO and PWM module\n");
> +
> +	ret = max7360_mask_irqs(regmap);
> +	if (ret)
> +		return dev_err_probe(dev, ret, "Could not mask interrupts\n");
> +
> +	ret =  devm_mfd_add_devices(dev, PLATFORM_DEVID_NONE,
> +				    max7360_cells, ARRAY_SIZE(max7360_cells),
> +				    NULL, 0, NULL);
> +	if (ret)
> +		return dev_err_probe(dev, ret, "Failed to register child devices\n");
> +
> +	return 0;
> +}

-- 
With Best Regards,
Andy Shevchenko