From: Sangbeom Kim <sbkim73@samsung.com>
To: "'Mark Brown'" <broonie@opensource.wolfsonmicro.com>
Cc: sameo@linux.intel.com, linux-kernel@vger.kernel.org
Subject: RE: [PATCH 3/3] mfd: Add I2C control support for S5M8751
Date: Thu, 23 Jun 2011 11:21:10 +0900 [thread overview]
Message-ID: <017301cc314c$37839eb0$a68adc10$@com> (raw)
In-Reply-To: <20110623012841.GF20949@opensource.wolfsonmicro.com>
On Thu, Jun 23, 2011 at 10:29 AM +0900, Mark Brown wrote:
> > Thank for your comment,
> > We have a few PMIC (S5M8751, S5M8752 and others).
> > They have different features. And Each one will have separate core file.
> > But i2c interface is same.
> > So, I try to separate i2s code.
> > I would modify prefix like s5m87xx.
>
> In that case you should definitely take a look at the regmap API I've
> been posting. It factors all the device I/O stuff out so you should be
> able to just tell it that you have a device with n bit registers and n
> bit values and it'll provide all the I/O functions you need. I just
> reposted it today, though it needs another round for some SPI stuff.
OK, After reviewing your patch, I will apply it.
> > > > +static int s5m8751_i2c_read_device(struct s5m8751 *s5m8751, uint8_t
> > reg,
> > > > + uint8_t *val)
> > > > +{
> > > > + int ret;
> > > > + ret = i2c_smbus_read_byte_data(s5m8751->i2c_client, reg);
> > > > + if (ret < 0) {
> > > > + dev_err(s5m8751->dev, "failed reading at 0x%02x\n",
> reg);
> > > > + return ret;
> > > > + }
> > > > + *val = (uint8_t)ret;
>
> > > Why is this case required?
>
> > I want pass the read value by val
>
> Sorry, typo - why is this *cast* required?
Just want to make same type.
Thanks,
SB Kim
next prev parent reply other threads:[~2011-06-23 2:21 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-22 5:53 [PATCH 0/3] S5M8751 core driver Sangbeom Kim
2011-06-22 5:53 ` [PATCH 1/3] mfd: Add S5M8751 register definitions Sangbeom Kim
2011-06-22 12:42 ` Mark Brown
2011-06-22 23:59 ` Sangbeom Kim
2011-06-22 5:53 ` [PATCH 2/3] mfd: Add initial S5M8751 support Sangbeom Kim
2011-06-22 12:48 ` Mark Brown
2011-06-23 1:14 ` Sangbeom Kim
2011-07-04 14:07 ` Samuel Ortiz
2011-07-04 23:49 ` Sangbeom Kim
2011-06-22 5:53 ` [PATCH 3/3] mfd: Add I2C control support for S5M8751 Sangbeom Kim
2011-06-22 8:56 ` Maxin B John
2011-06-22 12:50 ` Mark Brown
2011-06-23 1:25 ` Sangbeom Kim
2011-06-23 1:28 ` Mark Brown
2011-06-23 2:21 ` Sangbeom Kim [this message]
2011-06-23 10:35 ` Mark Brown
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