[U-Boot] [PATCH V5 10/10] EXYNOS5: I2C: Added FDT and non-FDT support for I2C

[Amarendra Reddy]

Hi Simon,

Please find the response below.

Thanks & Regards
Amarendra Reddy

On 27 January 2013 01:59, Simon Glass <sjg at chromium.org> wrote:

> Hi Amar,
>
> On Tue, Jan 22, 2013 at 12:43 AM, Amar <amarendra.xt at samsung.com> wrote:
> > This patch adds FDT and non-FDT support for I2C, and initialise
> > the I2C channels.
> >
> > Signed-off-by: Amar <amarendra.xt at samsung.com>
> > ---
> > Changes since V4:
> >         New patch.
> >
> >  drivers/i2c/s3c24x0_i2c.c | 13 +++++++++++--
> >  1 file changed, 11 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/i2c/s3c24x0_i2c.c b/drivers/i2c/s3c24x0_i2c.c
> > index 769a2ba..f2a035c 100644
> > --- a/drivers/i2c/s3c24x0_i2c.c
> > +++ b/drivers/i2c/s3c24x0_i2c.c
> > @@ -524,11 +524,12 @@ int i2c_write(uchar chip, uint addr, int alen,
> uchar *buffer, int len)
> >                  len) != 0);
> >  }
> >
> > -#ifdef CONFIG_OF_CONTROL
> >  void board_i2c_init(const void *blob)
> >  {
> > +       int i;
> > +#ifdef CONFIG_OF_CONTROL
> >         int node_list[CONFIG_MAX_I2C_NUM];
> > -       int count, i;
> > +       int count;
> >
> >         count = fdtdec_find_aliases_for_id(blob, "i2c",
> >                 COMPAT_SAMSUNG_S3C2440_I2C, node_list,
> > @@ -548,8 +549,16 @@ void board_i2c_init(const void *blob)
> >                 bus->bus_num = i2c_busses++;
> >                 exynos_pinmux_config(bus->id, 0);
> >         }
> > +#else
> > +       for (i = 0; i < CONFIG_MAX_I2C_NUM; i++) {
> > +               exynos_pinmux_config((PERIPH_ID_I2C0 + i),
> > +                                       PINMUX_FLAG_NONE);
> > +       }
> > +#endif
> > +       i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE);
>
> I suggest this goes up one line, since it shouldn't be needed in the
> FDT case, right?


Actually the function i2c_init() need not be called here. Only the pinmux
configuration need to be done here. Hence i2c_init() call will be removed
here.
i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE) is called from
arch/arm/lib/board.c which initialises I2C.

>  }
>
> +#ifdef CONFIG_OF_CONTROL
>  static struct s3c24x0_i2c_bus *get_bus(unsigned int bus_idx)
>  {
>         if (bus_idx < i2c_busses)
> --
> 1.8.0
>

Regards,
> Simon
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