linux-kernel - Re: [patch 2.6.18-git] SPI -- Freescale iMX SPI controller driver

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Message-ID: <82ecf08e0610021137r446031a8pa303053479e9cb27@mail.gmail.com>
Date:	Mon, 2 Oct 2006 14:37:39 -0400
From:	"Thiago Galesi" <thiagogalesi@...il.com>
To:	"David Brownell" <david-b@...bell.net>
Cc:	"Andrew Morton" <akpm@...l.org>,
	"Andrea Paterniani" <a.paterniani@...pp-eng.it>,
	"Linux Kernel list" <linux-kernel@...r.kernel.org>
Subject: Re: [patch 2.6.18-git] SPI -- Freescale iMX SPI controller driver

<nitpickery on>
+
> +/*-------------------------------------------------------------------------*/
> +/* SPI Control Register Bit Fields & Masks */
> +#define SPI_CONTROL_BITCOUNT   (0xF)           /* Bit Count Mask */
> +#define SPI_CONTROL_BITCOUNT_1 (0x0)           /* Bit Count = 1 */
> +#define SPI_CONTROL_BITCOUNT_2 (0x1)           /* Bit Count = 2 */
> +#define SPI_CONTROL_BITCOUNT_3 (0x2)           /* Bit Count = 3 */

I thinking these comments are awfully confusing (bitcount_1 == 0
?!?!?) and maybe redundant.

It would be much more useful to explain the logic behind why
(bitcount_1 == 0) and remove the /* Bit Count = X */ comments


> +/* SPI Soft Reset Register Bit Fields & Masks */
> +#define SPI_RESET_START                (0x1 << 0)      /* Start */

Wouldn't only (0x1) be better?

> +
> +/* Message state */
> +#define START_STATE                    ((void*)0)
> +#define RUNNING_STATE                  ((void*)1)
> +#define DONE_STATE                     ((void*)2)
> +#define ERROR_STATE                    ((void*)-1)

!?!??!?!

All in all, except for what Andrew has pointed out, it looks good,
maybe a little bit overengineered...

-- 
-
Thiago Galesi
-
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