> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]] On Behalf Of Nishanth Menon
> Sent: Friday, November 20, 2009 10:10 AM
> To: Pandita, Vikram
> Cc: [email protected]
> Subject: Re: [PATCH v3 1/2] omap: introduce
> uart_no_empty_fifo_read feature
>
> Vikram Pandita had written, on 11/20/2009 10:02 AM, the following:
> > Interoduce omap feature OMAP3_HAS_UART_NO_EMPTY_FIFO_READ
> ^^^^^^^^^ <- you meant introduce
> >
> > On omap3630/omap4 an empty fifo read causes a crash
> >
> > Signed-off-by: Vikram Pandita <[email protected]>
> > Ack-by: Menon, Nishanth <[email protected]>
> ^^^^^ <- :P nope you dont have my Acked-by until you
> change this to
> Acked from Ack ;)..
>
> Thanks for the simpler patch.
>
> > ---
> > arch/arm/mach-omap2/id.c | 7 +++++++
> > arch/arm/plat-omap/include/plat/cpu.h | 2 ++
> > 2 files changed, 9 insertions(+), 0 deletions(-)
> >
> > diff --git a/arch/arm/mach-omap2/id.c b/arch/arm/mach-omap2/id.c
> > index f48a4b2..3e266cd 100644
> > --- a/arch/arm/mach-omap2/id.c
> > +++ b/arch/arm/mach-omap2/id.c
> > @@ -176,6 +176,12 @@ void __init omap3_check_features(void)
> > OMAP3_CHECK_FEATURE(status, NEON);
> > OMAP3_CHECK_FEATURE(status, ISP);
> >
> > + /* On omap3630 and omap4: UART empty rx fifo read aborts */
> > + if (cpu_is_omap3630())
> > + omap3_features |= OMAP3_HAS_UART_NO_EMPTY_FIFO_READ;
> > + if (cpu_is_omap44xx())
> > + omap3_features |= OMAP3_HAS_UART_NO_EMPTY_FIFO_READ;
> > +
Probably not something ot be attached in this patch, but...
I'm a bit curious about something:
Why touching omap3_features in OMAP4?
Isn't there a omap4_features?
Or even better, an omap_features?
Regards,
Sergio
> > /*
> > * TODO: Get additional info (where applicable)
> > * e.g. Size of L2 cache.
> > @@ -316,6 +322,7 @@ void __init omap3_cpuinfo(void)
> > OMAP3_SHOW_FEATURE(sgx);
> > OMAP3_SHOW_FEATURE(neon);
> > OMAP3_SHOW_FEATURE(isp);
> > + OMAP3_SHOW_FEATURE(uart_no_empty_fifo_read);
> >
> > printk(")\n");
> > }
> > diff --git a/arch/arm/plat-omap/include/plat/cpu.h
> b/arch/arm/plat-omap/include/plat/cpu.h
> > index 2e17890..c32f015 100644
> > --- a/arch/arm/plat-omap/include/plat/cpu.h
> > +++ b/arch/arm/plat-omap/include/plat/cpu.h
> > @@ -497,6 +497,7 @@ extern u32 omap3_features;
> > #define OMAP3_HAS_SGX BIT(2)
> > #define OMAP3_HAS_NEON BIT(3)
> > #define OMAP3_HAS_ISP BIT(4)
> > +#define OMAP3_HAS_UART_NO_EMPTY_FIFO_READ BIT(5)
> >
> > #define OMAP3_HAS_FEATURE(feat,flag) \
> > static inline unsigned int omap3_has_ ##feat(void) \
> > @@ -509,5 +510,6 @@ OMAP3_HAS_FEATURE(sgx, SGX)
> > OMAP3_HAS_FEATURE(iva, IVA)
> > OMAP3_HAS_FEATURE(neon, NEON)
> > OMAP3_HAS_FEATURE(isp, ISP)
> > +OMAP3_HAS_FEATURE(uart_no_empty_fifo_read, UART_NO_EMPTY_FIFO_READ)
> >
> > #endif
>
>
> --
> Regards,
> Nishanth Menon
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