Re: [PATCH v2 11/13] iio: health: max30102: Prepare for copying varying number of measurements

[Jonathan Cameron <jic23@kernel.org>]

On Sun, 19 Nov 2017 12:52:56 -0800
Matt Ranostay <matt.ranostay@konsulko.com> wrote:

> On Fri, Oct 27, 2017 at 12:45 PM, Peter Meerwald-Stadler
> <pmeerw@pmeerw.net> wrote:
> > Current code assumes always 2 measurements (6 bytes) have to be copied,
> > prepare for more flexibility  
> 
> 
> Acked-by: Matt Ranostay <matt.ranostay@konsulko.com>
Applied.
> 
> >
> > Signed-off-by: Peter Meerwald-Stadler <pmeerw@pmeerw.net>
> > Cc: Matt Ranostay <matt.ranostay@konsulko.com>
> > ---
> >  drivers/iio/health/max30102.c | 15 ++++++++++-----
> >  1 file changed, 10 insertions(+), 5 deletions(-)
> >
> > diff --git a/drivers/iio/health/max30102.c b/drivers/iio/health/max30102.c
> > index 1c7fe63..86058f0 100644
> > --- a/drivers/iio/health/max30102.c
> > +++ b/drivers/iio/health/max30102.c
> > @@ -58,7 +58,7 @@ enum max3012_led_idx {
> >  #define MAX30102_REG_FIFO_OVR_CTR              0x05
> >  #define MAX30102_REG_FIFO_RD_PTR               0x06
> >  #define MAX30102_REG_FIFO_DATA                 0x07
> > -#define MAX30102_REG_FIFO_DATA_ENTRY_LEN       6
> > +#define MAX30102_REG_FIFO_DATA_BYTES           3
> >
> >  #define MAX30102_REG_FIFO_CONFIG               0x08
> >  #define MAX30102_REG_FIFO_CONFIG_AVG_4SAMPLES  BIT(1)
> > @@ -198,6 +198,11 @@ static inline int max30102_fifo_count(struct max30102_data *data)
> >         return 0;
> >  }
> >
> > +#define MAX30102_COPY_DATA(i) \
> > +       memcpy(&data->processed_buffer[(i)], \
> > +              &buffer[(i) * MAX30102_REG_FIFO_DATA_BYTES], \
> > +              MAX30102_REG_FIFO_DATA_BYTES)
> > +
> >  static int max30102_read_measurement(struct max30102_data *data)
> >  {
> >         int ret;
> > @@ -205,13 +210,13 @@ static int max30102_read_measurement(struct max30102_data *data)
> >
> >         ret = i2c_smbus_read_i2c_block_data(data->client,
> >                                             MAX30102_REG_FIFO_DATA,
> > -                                           MAX30102_REG_FIFO_DATA_ENTRY_LEN,
> > +                                           2 * MAX30102_REG_FIFO_DATA_BYTES,
> >                                             buffer);
> >
> > -       memcpy(&data->processed_buffer[0], &buffer[0], 3);
> > -       memcpy(&data->processed_buffer[1], &buffer[3], 3);
> > +       MAX30102_COPY_DATA(0);
> > +       MAX30102_COPY_DATA(1);
> >
> > -       return (ret == MAX30102_REG_FIFO_DATA_ENTRY_LEN) ? 0 : -EINVAL;
> > +       return (ret == 2 * MAX30102_REG_FIFO_DATA_BYTES) ? 0 : -EINVAL;
> >  }
> >
> >  static irqreturn_t max30102_interrupt_handler(int irq, void *private)
> > --
> > 2.7.4
> >  
> --
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