Re: [PATCH v3 7/8] mikrobus: Add mikrobus driver

From: Mark Brown <broonie@kernel.org>
To: Ayush Singh <ayushdevel1325@gmail.com>
Cc: linux-kernel@vger.kernel.org, jkridner@beagleboard.org,
	robertcnelson@beagleboard.org,
	Vaishnav M A <vaishnav@beagleboard.org>,
	Rob Herring <robh@kernel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
	Conor Dooley <conor+dt@kernel.org>, Nishanth Menon <nm@ti.com>,
	Vignesh Raghavendra <vigneshr@ti.com>,
	Tero Kristo <kristo@kernel.org>,
	Derek Kiernan <derek.kiernan@amd.com>,
	Dragan Cvetic <dragan.cvetic@amd.com>,
	Arnd Bergmann <arnd@arndb.de>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	Liam Girdwood <lgirdwood@gmail.com>,
	Jiri Slaby <jirislaby@kernel.org>,
	Johan Hovold <johan@kernel.org>, Alex Elder <elder@kernel.org>,
	devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
	linux-spi@vger.kernel.org, linux-serial@vger.kernel.org,
	greybus-dev@lists.linaro.org
Subject: Re: [PATCH v3 7/8] mikrobus: Add mikrobus driver
Date: Fri, 15 Mar 2024 19:03:57 +0000	[thread overview]
Message-ID: <ba2d158c-db0f-4037-b21b-82ee25208ea7@sirena.org.uk> (raw)
In-Reply-To: <20240315184908.500352-8-ayushdevel1325@gmail.com>

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On Sat, Mar 16, 2024 at 12:19:05AM +0530, Ayush Singh wrote:

> +	if (dev->regulators) {
> +		if (dev->protocol == GREYBUS_PROTOCOL_SPI) {
> +			snprintf(devname, sizeof(devname), "%s.%u", dev_name(&port->spi_ctrl->dev),
> +				 port->chip_select[dev->reg]);
> +			regulator.dev_name = kmemdup(devname, MIKROBUS_NAME_SIZE, GFP_KERNEL);
> +		} else if (dev->protocol == GREYBUS_PROTOCOL_RAW) {

It looks like you're trying to write a switch statement here...

> +		for (i = 0; i < dev->num_regulators; i++) {
> +			val = dev->regulators[i].value.u64_data;
> +			regulator.supply =
> +				kmemdup(dev->regulators[i].name, MIKROBUS_NAME_SIZE, GFP_KERNEL);
> +			dev_info(&port->dev, "adding fixed regulator %llu uv, %s for %s", *val,
> +				 regulator.supply, regulator.dev_name);
> +			regulator_register_always_on(0, dev->regulators[i].name, &regulator, 1,
> +						     *val);
> +		}

The registered regualtor is ignored here which means you leak the
regualtors every time a device is unregistered...

> +static void mikrobus_device_unregister(struct mikrobus_port *port, struct board_device_info *dev,
> +				       char *board_name)

...an operation which does seem to be supported?

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