linux-kernel - Re: [PATCH 1/4][V3] spi: Add optional stall delay between cs

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Date:   Mon, 22 Jul 2019 17:32:02 +0100
From:   Mark Brown <broonie@...nel.org>
To:     Alexandru Ardelean <alexandru.ardelean@...log.com>
Cc:     linux-iio@...r.kernel.org, linux-spi@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        jic23@...nel.org, robh+dt@...nel.org, mark.rutland@....com,
        Michael Hennerich <michael.hennerich@...log.com>
Subject: Re: [PATCH 1/4][V3] spi: Add optional stall delay between cs_change
 transfers

On Mon, Jul 22, 2019 at 03:47:44PM +0300, Alexandru Ardelean wrote:
> Some devices like the ADIS16460 IMU require a longer period between
> transfers, i.e. between when the CS is de-asserted and re-asserted. The
> default value of 10us is not enough. This change makes the delay
> configurable for when the next CS change goes active, allowing the default
> to remain 10us is case it is unspecified.

For the third time:

| This looks like cs_change_delay.

>  #define	SPI_NBITS_QUAD		0x04 /* 4bits transfer */
>  	u8		bits_per_word;
>  	u8		word_delay_usecs;
> +	u8		cs_change_delay;
>  	u16		delay_usecs;
>  	u32		speed_hz;
>  	u16		word_delay;

This patch doesn't apply and even if it did it won't compile because you
are trying to add a field with the same name as an existing one.

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