linux-kernel - Re: [PATCH 3/8] spi: spi-ep93xx: always handle transfer specific settings

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Message-ID: <51CE199A.4040606@gmail.com>
Date:	Sat, 29 Jun 2013 09:17:46 +1000
From:	Ryan Mallon <rmallon@...il.com>
To:	H Hartley Sweeten <hartleys@...ionengravers.com>
CC:	Linux Kernel <linux-kernel@...r.kernel.org>,
	spi-devel-general@...ts.sourceforge.net, mika.westerberg@....fi,
	broonie@...nel.org, grant.likely@...aro.org
Subject: Re: [PATCH 3/8] spi: spi-ep93xx: always handle transfer specific
 settings

On 29/06/13 04:43, H Hartley Sweeten wrote:

> __spi_async(), which starts every SPI message transfer, initializes
> the bits_per_word and max speed for every transfer in the message.
> Since the conditional test in ep93xx_spi_process_transfer() will
> always succeed just remove it and always call ep93xx_spi_chip_setup()
> to configure the hardware for each transfer in the message.
> 
> Remove the redundant ep93xx_spi_chp_setup() in ep93xx_spi_process_transfer()
> which just initializes the hardware to the "default" based on the SPI
> device.
> 
> Signed-off-by: H Hartley Sweeten <hsweeten@...ionengravers.com>
> Cc: Ryan Mallon <rmallon@...il.com>
> Cc: Mika Westerberg <mika.westerberg@....fi>
> Cc: Mark Brown <broonie@...nel.org>
> Cc: Grant Likely <grant.likely@...aro.org>
> ---


> +	err = ep93xx_spi_calc_divisors(espi, chip, t->speed_hz);
> +	if (err) {
> +		dev_err(&espi->pdev->dev, "failed to adjust speed\n");


Printing out the speed it was trying to set might be useful here?

~Ryan
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