On Thu, Oct 31, 2013 at 08:10:28PM +0000, Renaud Barbier wrote:
> On 31/10/2013 07:48, Sascha Hauer wrote:
> >>> +
> >>> > > + fsl_i2c_init(0, 400000, 0x7f);
> >>> > > + /* Read board id from offset 0. */
> >>> > > + ret = fsl_i2c_read(i2c, 0x3b, 0, 1, &id, sizeof(uint8_t));
> >>> > > + fsl_i2c_stop(i2c);
> >>> > > +
> >>> > > + if (ret == -1) {
> >>> > > + /* Enable I2C bus on GBX460. */
> >>> > > + out_be16(IOMEM(0xfc010020), 0);
> >>> > > + ret = fsl_i2c_read(i2c, 0x3b, 0, 1, &id, sizeof(uint8_t));
> >>> > > + fsl_i2c_stop(i2c);
> >> > why you do not simly use the standdard i2c AP?
> > I think because the machine is still running from SRAM or flash here and
> > I2C is needed to read out the SPD EEPROM for setting up SDRAM.
> >
>
> In order to use the I2C API would I not need to register my i2c bus
> first? This only happens later in the initcall list with device-initcall.
Yes, You would have to have your i2c bus registered. Can't you move the
above to late_initcall?
Sascha
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