linux-kernel - Re: mc13xxx-core: kernel hangs after 'regmap

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Message-ID: <20120524060402.GC7843@S2100-06.ap.freescale.net>
Date:	Thu, 24 May 2012 14:04:03 +0800
From:	Shawn Guo <shawn.guo@...escale.com>
To:	Fabio Estevam <festevam@...il.com>
CC:	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	<marc@...esign.com.au>, Samuel Ortiz <sameo@...ux.intel.com>,
	Sascha Hauer <kernel@...gutronix.de>,
	Philippe Rétornaz <philippe.retornaz@...l.ch>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: mc13xxx-core: kernel hangs after 'regmap_read'

On Thu, May 24, 2012 at 01:07:43AM -0300, Fabio Estevam wrote:
> Shawn,
> 
> On Wed, May 23, 2012 at 9:48 PM, Shawn Guo <shawn.guo@...escale.com> wrote:
> 
> > I'm booting my imx51 babbage with MC13892 with no problem now.  And
> > reading the registers give me the same values as I do with u-boot.
> 
> Ok, just to confirm: is the patch below that you are using?
> 
Yes.

Regards,
Shawn

> diff --git a/drivers/mfd/mc13xxx-spi.c b/drivers/mfd/mc13xxx-spi.c
> index 3fcdab3..5d1969f 100644
> --- a/drivers/mfd/mc13xxx-spi.c
> +++ b/drivers/mfd/mc13xxx-spi.c
> @@ -49,6 +49,7 @@ static struct regmap_config mc13xxx_regmap_spi_config = {
>  	.reg_bits = 7,
>  	.pad_bits = 1,
>  	.val_bits = 24,
> +	.write_flag_mask = 0x80,
> 
>  	.max_register = MC13XXX_NUMREGS,
> 
> @@ -73,7 +74,6 @@ static int mc13xxx_spi_probe(struct spi_device *spi)
> 
>  	dev_set_drvdata(&spi->dev, mc13xxx);
>  	spi->mode = SPI_MODE_0 | SPI_CS_HIGH;
> -	spi->bits_per_word = 32;
> 
>  	mc13xxx->dev = &spi->dev;
>  	mutex_init(&mc13xxx->lock);
> 
> 
> I am trying to understand why mx31pdk still fails.
> 

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