RE: [PATCH 1/2] MFD: TPS65217: Add new mfd device for TPS65217

From: AnilKumar, Chimata
Date: Wed Dec 28 2011 - 04:14:51 EST


Hi Mark,

Thanks for reviewing these patches.

On Fri, Dec 23, 2011 at 16:19:18, Mark Brown wrote:
> On Fri, Dec 23, 2011 at 10:51:19AM +0530, AnilKumar Ch wrote:
> > The TPS65217 chip is a power management IC for Portable Navigation Systems
> > and Tablet Computing devices. It contains the following components:
>
> I can't help but thinking that there ought to be more code sharing
> between the various TI PMIC drivers.
>
> > +static int tps65217_i2c_read_device(struct tps65217_dev *tps65217, char reg,
> > + int bytes, void *dest)
> > +{
> > + struct i2c_client *i2c = tps65217->i2c_client;
> > + struct i2c_msg xfer[2];
> > + int ret;
>
> Use regmap for the register I/O, this will save a lot of code and will
> also give access to things like the register cache code.
>

All the I2C read and writes moved to regmap read and writes.

> > + tps65217 = kzalloc(sizeof(struct tps65217_dev), GFP_KERNEL);
> > + if (tps65217 == NULL)
> > + return -ENOMEM;
>
> Use devm_kzalloc(), it saves all the unwinding code.

Changed kzalloc to devm_kzalloc

>
> > +/* All register addresses */
> > +#define TPS65217_REG_CHIPID 0X00
>
> You should verify this as part of the probe() routine - read it back to
> make sure it's what's expected, and log the chip revision too in case it
> is useful for diagnostics.
>

Added chip verification code to mfd probe and printing the regulator ID &
version number.

Thanks
AnilKumar
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