Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1336813

Re: [PATCHv5 6/7] eeprom: 93xx46: extend driver to plug into the NVMEM framework

Show all headers | View raw

On 17 February 2016 at 23:11, Andrew Lunn <andrew@lunn.ch> wrote:
> On Wed, Feb 17, 2016 at 11:02:56PM +0100, Joachim Eastwood wrote:
>> Hi Andrew,
>>
>> On 17 February 2016 at 21:07, Andrew Lunn <andrew@lunn.ch> wrote:
>> > Add a regmap for accessing the EEPROM, and then use that with the
>> > NVMEM framework. Enable backward compatibility in the MVMEM config
>>
>> typo: MVMEM
>
> Thanks
>
>> > +/*
>> > + * Provide a regmap interface, which is registered with the NVMEM
>> > + * framework
>> > +*/
>> > +static int eeprom_93xx46_regmap_read(void *context, const void *reg,
>> > +                                    size_t reg_size, void *val,
>> > +                                    size_t val_size)
>> > +{
>> > +       struct eeprom_93xx46_dev *eeprom_93xx46 = context;
>> > +       off_t offset = *(u32 *)reg;
>> > +       int err;
>> > +
>> > +       err = eeprom_93xx46_read(eeprom_93xx46, val, offset, val_size);
>> > +       if (err)
>> > +               return err;
>> > +       return 0;
>>
>> Can be:
>> return eeprom_93xx46_read(eeprom_93xx46, val, offset, val_size);
>>
>> Allows you to remove the 'err' variable also.
>
> Nope. regmap wants a return value of 0 or error. eeprom_93xx46_read()
> returns how many bytes where actually read. So we either need this
> code here, or we change the return from eeprom_93xx46_read().

ah, my bad. Sorry about that.


regards,
Joachim Eastwood

Back to linux.kernel | Previous | Next — Previous in thread | Find similar | Unroll thread

Thread

[PATCHv5 0/7] Convert exiting EEPROM drivers to NVMEM Andrew Lunn <andrew@lunn.ch> - 2016-02-17 21:10 +0100
  [PATCHv5 2/7] nvmem: Add backwards compatibility support for older EEPROM drivers. Andrew Lunn <andrew@lunn.ch> - 2016-02-17 21:10 +0100
  [PATCHv5 7/7] misc: at24: replace memory_accessor with nvmem_device_read Andrew Lunn <andrew@lunn.ch> - 2016-02-17 21:10 +0100
  [PATCHv5 3/7] eeprom: at24: extend driver to plug into the NVMEM framework Andrew Lunn <andrew@lunn.ch> - 2016-02-17 21:10 +0100
    Re: [PATCHv5 3/7] eeprom: at24: extend driver to plug into the NVMEM framework Bartosz Golaszewski <bgolaszewski@baylibre.com> - 2016-02-18 11:30 +0100
  [PATCHv5 5/7] eeprom: at25: extend driver to plug into the NVMEM framework Andrew Lunn <andrew@lunn.ch> - 2016-02-17 21:10 +0100
  [PATCHv5 1/7] nvmem: Add flag to export NVMEM to root only Andrew Lunn <andrew@lunn.ch> - 2016-02-17 21:20 +0100
  [PATCHv5 4/7] eeprom: at25: Remove in kernel API for accessing the EEPROM Andrew Lunn <andrew@lunn.ch> - 2016-02-17 21:20 +0100
  [PATCHv5 6/7] eeprom: 93xx46: extend driver to plug into the NVMEM framework Andrew Lunn <andrew@lunn.ch> - 2016-02-17 21:20 +0100
    Re: [PATCHv5 6/7] eeprom: 93xx46: extend driver to plug into the  NVMEM framework Joachim Eastwood <manabian@gmail.com> - 2016-02-17 23:10 +0100
    Re: [PATCHv5 6/7] eeprom: 93xx46: extend driver to plug into the  NVMEM framework Joachim Eastwood <manabian@gmail.com> - 2016-02-17 23:10 +0100
      Re: [PATCHv5 6/7] eeprom: 93xx46: extend driver to plug into the  NVMEM framework Andrew Lunn <andrew@lunn.ch> - 2016-02-17 23:20 +0100
        Re: [PATCHv5 6/7] eeprom: 93xx46: extend driver to plug into the  NVMEM framework Joachim Eastwood <manabian@gmail.com> - 2016-02-17 23:20 +0100

csiph-web