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Re: [RFC PATCH 1/3] MIPS: Alchemy: extended DB1200 board support.

To: Kevin Hickey <>
Subject: Re: [RFC PATCH 1/3] MIPS: Alchemy: extended DB1200 board support.
From: Manuel Lauss <>
Date: Tue, 3 Nov 2009 16:44:04 +0100
Cc: Linux-MIPS <>, Manuel Lauss <>
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On Tue, Nov 3, 2009 at 4:41 PM, Kevin Hickey <> wrote:
> On Mon, 2009-11-02 at 21:21 +0100, Manuel Lauss wrote:
>> Create own directory for DB1200 code and update it with new features.
>> - SPI support:
>>   - tmp121 temperature sensor
>>   - SPI flash on DB1200
>> - I2C support
>>   - NE1619 sensor
>>   - AT24 eeprom
>> - I2C/SPI can be selected at boot time via switch S6.8
>> - Carddetect IRQs for SD cards.
>> - gen_nand based NAND support.
>> - hexleds count sleep/wake transitions.
>> Signed-off-by: Manuel Lauss <>
>> ---
> The code in this patch all looks good to me.  I don't understand how
> much value is added by using the hex LEDs for counting sleep/wake
> transitions.  In our internal builds, we use the hex LEDs for displaying
> the last interrupt serviced (useful on hangs/crashes and for getting a
> general sense of what the hardware is working on), the dots blink on
> timer ticks (often every 100 or 1000 depending on the clock) and the
> Idle state is shown on LED0.  I don't really have any strong attachment
> to those usages, but they've served us well.

I admit it has limited value.. I initially used it to find out how many wakeups
per second are happening with and without high-speed usb devices attached.
I left it in because I couldn't come up with any other uses.  Please feel free
to change it any time.


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