linux-kernel - Re: [PATCH v6 3/6] mfd: at91-usart: added mfd driver for usart

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Date:   Mon, 11 Jun 2018 17:36:32 +0200
From:   Alexandre Belloni <alexandre.belloni@...tlin.com>
To:     Radu Pirea <radu.pirea@...rochip.com>
Cc:     broonie@...nel.org, nicolas.ferre@...rochip.com,
        lee.jones@...aro.org, richard.genoud@...il.com, robh+dt@...nel.org,
        mark.rutland@....com, gregkh@...uxfoundation.org,
        linux-spi@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        linux-serial@...r.kernel.org
Subject: Re: [PATCH v6 3/6] mfd: at91-usart: added mfd driver for usart

On 07/06/2018 14:00:17+0300, Radu Pirea wrote:
> +static int at91_usart_mode_probe(struct platform_device *pdev)
> +{
> +	struct mfd_cell cell;
> +	u32 opmode;

This has to be initialized to AT91_USART_MODE_SERIAL...

> +	int err;
> +
> +	err = device_property_read_u32(&pdev->dev, "atmel,usart-mode", &opmode);
> +

because if the property is not present, then opmode will not be modified
which means it could hold the value of AT91_USART_MODE_SPI.


-- 
Alexandre Belloni, Bootlin (formerly Free Electrons)
Embedded Linux and Kernel engineering
https://bootlin.com