linux-kernel - Re: [PATCH 9/8 v2] ARM OMAP2+ GPMC: fix programming/showing reserved timing parameters

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Date:	Wed, 25 Feb 2015 16:17:17 +0100
From:	Robert Abel <rabel@...-ec.uni-bielefeld.de>
To:	Roger Quadros <rogerq@...com>, linux-omap@...r.kernel.org
CC:	linux-kernel@...r.kernel.org, tony@...mide.com,
	linux@....linux.org.uk
Subject: Re: [PATCH 9/8 v2] ARM OMAP2+ GPMC: fix programming/showing reserved
 timing parameters

Hi Roger,

On 25 Feb 2015 11:44, Roger Quadros wrote:
> typo ATTCHEDDEVICEPAGELENGTH->ATTACHEDDEVICEPAGELENGTH 
Yep.
>> +/** DEVICESIZE Max Value */
>> +#define GPMC_CONFIG1_DEVICESIZE_MAX     GPMC_CONFIG1_DEVICESIZE_16
> Shouldn't this be 1 instead? I'm hoping max value is without the shift
> based on GPMC_CONFIG1_CLKACTIVATIONTIME_MAX.
Yes, it should. It's a remnant from the change below...
>> + * @max     Maximum parameter value (after optional @shift).
> max should be absolute value, without the shift.
Yes, forgot to change that.
>> +#define GPMC_GET_RAW_SHIFT(reg, st, end, shift, max, field) \
>> +	get_gpmc_timing_reg(cs, (reg), (st), (end), (max), field, GPMC_CD_FCLK, (shift), 1, 1)
> Is it better to rename this to GPMC_GET_RAW_SHIFT_MAX() as it takes the max parameter.
Ok.
>> +	GPMC_GET_RAW_SHIFT(GPMC_CS_CONFIG1, 23, 24, 4, 2, "burst-length");
> want to define GPMC_CONFIG1_BURSTLENGTH_MAX?
Yes, for consistency. Originally, i was not going to create defines for 
limits used only in one place, as opposed to WAITMONITORINGTIME and 
CLKACTIVATIONTIME.
>> -	GPMC_GET_TICKS_CD(GPMC_CS_CONFIG1, 18, 19, "wait-monitoring-ns", GPMC_CD_CLK);
>> -	GPMC_GET_TICKS(GPMC_CS_CONFIG1, 25, 26, "clk-activation-ns");
>> +	GPMC_GET_TICKS_CD_MAX(GPMC_CS_CONFIG1, 18, 19, GPMC_CONFIG1_WAIT_MON_TIME_MAX, "wait-monitoring-ns", GPMC_CD_CLK);
> use GPMC_CONFIG1_WAITMONTIME_MAX to have consistent naming.
I used the naming the other define had. Saw no point in changing them. 
They go mostly unused anyway.
Might as well change it.

>> +#define GPMC_SET_ONE_CD(reg, st, end, field, cd) \
>> +	GPMC_SET_ONE_CD_MAX(reg, st, end, 0, field, GPMC_CD_FCLK)
> last parameter should be (cd) instead of GPMC_CD_FCLK.
Ah, copy-paste, there you are again. Luckily this define goes unused, 
because all GPMC_SET_ONE_CD became GPMC_SET_ONE_CD_MAX anyway.
So I'll delete that. Quite a keen eye, though ;)

Regards,

Robert
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