[U-Boot] [PATCH] dwc_ahsata.c: Add weak disable_sata_clock

[Soeren Moch <smoch@web.de>]

On 11/25/14 23:34, Soeren Moch wrote:
> > Signed-off-by: Tom Rini <trini@ti.com  <http://lists.denx.de/mailman/listinfo/u-boot>>
> > ---
> > drivers/block/dwc_ahsata.c |    5 +++++
> >  1 file changed, 5 insertions(+)
> >
> > diff --git a/drivers/block/dwc_ahsata.c b/drivers/block/dwc_ahsata.c
> > index 9a2b547..e9d4283 100644
> > --- a/drivers/block/dwc_ahsata.c
> > +++ b/drivers/block/dwc_ahsata.c
> > @@ -16,6 +16,7 @@
> >  #include <asm/errno.h>
> >  #include <asm/io.h>
> >  #include <linux/bitops.h>
> > +#include <linux/compiler.h>
> >  #include <asm/arch/clock.h>
> >  #include <asm/arch/sys_proto.h>
> >  #include "dwc_ahsata.h"
> > @@ -592,6 +593,10 @@ int init_sata(int dev)
> >  	return 0;
> >  }
> >
> > +__weak void  disable_sata_clock(void)
> > +{
> > +}
> > +
> >  int reset_sata(int dev)
> >  {
> >  	struct ahci_probe_ent *probe_ent =
>
> Tom, Nikita,
>
> instead of adding a weak function for architectures without 'disable_sata_clock',
> should we remove this call from reset_sata entirely?
>
> 'reset_sata' is called repeatedly for several devices, but 'disable_sata_clock'
> has no such device parameter. Which clock should be disabled here? Makes not much
> sense for me.
>
> BTW, there is an additional problem with 'reset_sata'. If sata support is configured
> into u-boot, but nobody has called 'sata init' before booting the kernel, I see a
> data abort exception on bootm. Tested on TBS2910 board (i.MX6Q-based).
>
> Regards,
> Soeren
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