* Questions in spi_mpc83xx.c
@ 2009-07-09 18:16 Mark Bishop
[not found] ` <20090709141648.ws3ak25ewwogwsc0-2+Z7l/WXEz7k1uMJSBkQmQ@public.gmane.org>
0 siblings, 1 reply; 4+ messages in thread
From: Mark Bishop @ 2009-07-09 18:16 UTC (permalink / raw)
To: spi-devel-general; +Cc: linuxppc-dev
I haven't seen this before - the '##' in the function name. This is ANCII C?
#define MPC83XX_SPI_TX_BUF(type) \
u32 mpc83xx_spi_tx_buf_##type(struct mpc83xx_spi *mpc83xx_spi) \
{ \
u32 data; \
....
Also, I have a SPI chip here that will drive MISO high when it is
ready to accept more data. It acts like a hardware handshake. I was
thinking about making changes to the controller source (spi_mpc83xx.c,
in my case) to support this.
This is the only SPI chip contained on this system so I am not worried
about affecting other SPI devices hooked to the controller.
What are people's opinion on this as far as right place to implement,
and I could use a push as to where in the controller to make mods if
appropriate.
And if it isn't obvious already I am still learning a bit as to how
the SPI sub-system is organized. I have taken apart the
documentation in the kernel Documentation/spi directory and am reading
all the code in drivers/spi.
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Questions in spi_mpc83xx.c
2009-07-09 18:16 Questions in spi_mpc83xx.c Mark Bishop
@ 2009-07-09 18:38 ` Baruch Siach
0 siblings, 0 replies; 4+ messages in thread
From: Baruch Siach @ 2009-07-09 18:38 UTC (permalink / raw)
To: Mark Bishop
Cc: spi-devel-general-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f,
linuxppc-dev-mnsaURCQ41sdnm+yROfE0A
Hi Mark,
On Thu, Jul 09, 2009 at 02:16:48PM -0400, Mark Bishop wrote:
> I haven't seen this before - the '##' in the function name. This is ANCII C?
Of course. See pp. 90-91 in "The C Programming Language" second edition.
>
> #define MPC83XX_SPI_TX_BUF(type) \
> u32 mpc83xx_spi_tx_buf_##type(struct mpc83xx_spi *mpc83xx_spi) \
> { \
> u32 data; \
> ....
baruch
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^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [spi-devel-general] Questions in spi_mpc83xx.c
@ 2009-07-09 18:38 ` Baruch Siach
0 siblings, 0 replies; 4+ messages in thread
From: Baruch Siach @ 2009-07-09 18:38 UTC (permalink / raw)
To: Mark Bishop; +Cc: spi-devel-general, linuxppc-dev
Hi Mark,
On Thu, Jul 09, 2009 at 02:16:48PM -0400, Mark Bishop wrote:
> I haven't seen this before - the '##' in the function name. This is ANCII C?
Of course. See pp. 90-91 in "The C Programming Language" second edition.
>
> #define MPC83XX_SPI_TX_BUF(type) \
> u32 mpc83xx_spi_tx_buf_##type(struct mpc83xx_spi *mpc83xx_spi) \
> { \
> u32 data; \
> ....
baruch
--
~. .~ Tk Open Systems
=}------------------------------------------------ooO--U--Ooo------------{=
- baruch@tkos.co.il - tel: +972.2.679.5364, http://www.tkos.co.il -
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [spi-devel-general] Questions in spi_mpc83xx.c
2009-07-09 18:38 ` [spi-devel-general] " Baruch Siach
(?)
@ 2009-07-09 19:29 ` Mark Bishop
-1 siblings, 0 replies; 4+ messages in thread
From: Mark Bishop @ 2009-07-09 19:29 UTC (permalink / raw)
To: Baruch Siach; +Cc: spi-devel-general, linuxppc-dev
Quoting Baruch Siach <baruch@tkos.co.il>:
> Hi Mark,
>
> On Thu, Jul 09, 2009 at 02:16:48PM -0400, Mark Bishop wrote:
>> I haven't seen this before - the '##' in the function name. This
>> is ANCII C?
>
> Of course. See pp. 90-91 in "The C Programming Language" second edition.
>
>>
Wow, thanks. I missed that little nugget of info.
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2009-07-09 19:34 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2009-07-09 18:16 Questions in spi_mpc83xx.c Mark Bishop
[not found] ` <20090709141648.ws3ak25ewwogwsc0-2+Z7l/WXEz7k1uMJSBkQmQ@public.gmane.org>
2009-07-09 18:38 ` Baruch Siach
2009-07-09 18:38 ` [spi-devel-general] " Baruch Siach
2009-07-09 19:29 ` Mark Bishop
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