[PATCH 01/10] pinctrl: use postcore_initcall

Tony Lindgren tony at atomide.com
Thu Oct 18 22:38:18 EDT 2012

* Haojian Zhuang <haojian.zhuang at gmail.com> [121018 19:17]:
> On Fri, Oct 19, 2012 at 6:28 AM, Tony Lindgren <tony at atomide.com> wrote:
> >
> > Specifically could you decribe the cases where this issue happens?
> > Also check if one of your client drivers has some early initcall
> > that's no longer needed.
> Yes, the special case is PMIC. Most of PMIC are based on I2C/SPI bus.
> It means that I2C/SPI bus driver should be initialized firstly. For example,
> we could find that PMIC mfd driver are initialized in subsys init call level.
> It means that pinctrl should be initialized earlier than I2C/SPI bus driver.
> Otherwise, pins of I2C bus may not be configured as I2C function since
> pinctrl driver is module init call level.

Hmm, the order in drivers/Makefile is already:


Maybe check that your i2c drivers don't have non-standard initcalls?

Also the i2c drivers may need to return -EPROBE_DEFER?



More information about the linux-arm-kernel mailing list