Re: [PATCH] nand: gpmi-nand: Fix clock registration

[Marek Vasut <marex@denx.de>]

Dear Huang Shijie,

> 于 2012年09月24日 02:31, Fabio Estevam 写道:
> > From: Fabio Estevam <fabio.estevam@freescale.com>
> > 
> > On a mx28 board the following error happens since commit 638064e56c
> > (mtd: gpmi: change the code for clocks):
> > 
> > gpmi-nand: probe of 8000c000.gpmi-nand failed with error -12
> > 
> > Acquire the clock using "NULL" as it was done previously, so that the
> > driver can register on mx23/mx28 as well.
> > 
> > Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
> > ---
> > 
> >  drivers/mtd/nand/gpmi-nand/gpmi-nand.c |    2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/drivers/mtd/nand/gpmi-nand/gpmi-nand.c
> > b/drivers/mtd/nand/gpmi-nand/gpmi-nand.c index c46be6c..1f23cb4 100644
> > --- a/drivers/mtd/nand/gpmi-nand/gpmi-nand.c
> > +++ b/drivers/mtd/nand/gpmi-nand/gpmi-nand.c
> > @@ -492,7 +492,7 @@ static int __devinit gpmi_get_clks(struct
> > gpmi_nand_data *this)
> > 
> >  	int i;
> >  	
> >  	/* The main clock is stored in the first. */
> > 
> > -	r->clock[0] = clk_get(this->dev, "gpmi_io");
> > +	r->clock[0] = clk_get(this->dev, NULL);
> 
> Please do not change this line.
> 
> The gpmi_io is for mx6q.
> If you replace it with `NULL`. The mx6q can not find the proper clock.

Suggestion is really welcome though, please :) This is a problem, GPMI NAND is 
broken on anything != mx6q. Huang, can you please also test the changes you do 
to GPMI NAND on mx28/mx23 so we can avoid this breakage in the future?

Best regards,
Marek Vasut