linux-kernel - Re: [PATCH 2/8] regmap: Add I2C bus support

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Message-ID: <4DFFD64F.8040902@metafoo.de>
Date:	Tue, 21 Jun 2011 01:22:55 +0200
From:	Lars-Peter Clausen <lars@...afoo.de>
To:	Mark Brown <broonie@...nsource.wolfsonmicro.com>
CC:	linux-kernel@...r.kernel.org,
	Dimitris Papastamos <dp@...nsource.wolfsonmicro.com>,
	Liam Girdwood <lrg@...com>,
	Samuel Oritz <sameo@...ux.intel.com>,
	Graeme Gregory <gg@...mlogic.co.uk>
Subject: Re: [PATCH 2/8] regmap: Add I2C bus support

On 06/20/2011 02:54 PM, Mark Brown wrote:
> [...]
> +
> +#include <linux/regmap.h>
> +#include <linux/i2c.h>

#include <linux/init.h>

> [...]
> +
> +static int regmap_i2c_read(struct device *dev,
> +			   const void *reg, size_t reg_size,
> +			   void *val, size_t val_size)
> +{
> +	struct i2c_client *i2c = to_i2c_client(dev);
> +	struct i2c_msg xfer[2];
> +	int ret;
> +
> +	if (!i2c_check_functionality(i2c->adapter, I2C_FUNC_PROTOCOL_MANGLING))
> +		return -ENOTSUPP;

You shouldn't need I2C_FUNC_PROTOCOL_MANGLING for reading.

> [...]
> diff --git a/drivers/regmap/regmap.c b/drivers/regmap/regmap.c
> index a8610c7..896b710 100644
> --- a/drivers/regmap/regmap.c
> +++ b/drivers/regmap/regmap.c
> @@ -461,7 +461,7 @@ out:
>  [...]

I guess this should be part of the first patch.


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