linux-kernel - Re: [PATCH V8 1/3] mfd: Add support for UP board CPLD/FPGA

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Message-ID: <1d4ef18e-bb2c-4ede-872b-19bfd20b8170@kernel.org>
Date: Thu, 28 Dec 2023 16:27:06 +0100
From: Krzysztof Kozlowski <krzk@...nel.org>
To: "larry.lai" <larry.lai@...jingtech.com>, lee@...nel.org,
 andriy.shevchenko@...ux.intel.com, linus.walleij@...aro.org, pavel@....cz
Cc: linux-kernel@...r.kernel.org, linux-gpio@...r.kernel.org,
 linux-leds@...r.kernel.org, GaryWang@...on.com.tw, musa.lin@...jingtech.com,
 jack.chang@...jingtech.com, noah.hung@...jingtech.com
Subject: Re: [PATCH V8 1/3] mfd: Add support for UP board CPLD/FPGA

On 28/12/2023 16:15, larry.lai wrote:
> The UP Squared board <http://www.upboard.com> implements certain
> features (pin control, onboard LEDs or CEC) through an on-board CPLD/FPGA.
> 
> This driver implements the line protocol to read and write registers
> from the FPGA through regmap. The register address map is also included.
> 

...

> +
> +static const struct acpi_device_id upboard_fpga_acpi_match[] = {
> +	{ "AANT0F00", (kernel_ulong_t)&upboard_up_fpga_data },
> +	{ "AANT0F01", (kernel_ulong_t)&upboard_up2_fpga_data },
> +	{ "AANT0F02", (kernel_ulong_t)&upboard_upcore_crex_fpga_data },
> +	{ "AANT0F03", (kernel_ulong_t)&upboard_upcore_crst02_fpga_data },
> +	{ "AANT0F04", (kernel_ulong_t)&upboard_up_fpga_data },
> +	{ }
> +};
> +MODULE_DEVICE_TABLE(acpi, upboard_fpga_acpi_match);
> +
> +static int upboard_fpga_probe(struct platform_device *pdev)
> +{
> +	struct device *dev = &pdev->dev;
> +	struct upboard_fpga *ddata;
> +	int ret;
> +
> +	ddata = devm_kzalloc(dev, sizeof(ddata), GFP_KERNEL);

This wasn't tested. You allocate size of the pointer.


Best regards,
Krzysztof