Subject: [PATCH 4/8] memory: emif: Handle devices which are not rated for >85C

From: [email-masked] (Santosh Shilimkar)
Date: Mon, 11 Mar 2013 11:08:21 +0530

On Monday 11 March 2013 10:36 AM, Lokesh Vutla wrote:
> From: Nishanth Menon <[email-masked]>
> 
> As per JESD209-2E specification for LPDDR2,
>       http://www.jedec.org/standards-documents/results/jesd209-2E
> Table 73, LPDDR2 memories come in two flavors - Standard and
> Extended. The Standard types can operate from -25C to +85C
> However, beyond that and upto +105C can only be supported by
> Extended types.
> 
right.

> Unfortunately, it seems there is no info in MR0(device info) or
> MR[1,2](device feature) for run time detection of this capability
> as far as seen on the spec. Hence, we provide a custom_config
> flag to be populated by platforms which have these "extended"
> type memories.
> 
> For the "Standard" memories, we need to consider MR4 notifications
> of temperature triggers >85C as equivalent to thermal shutdown
> events (equivalent to Spec specified thermal shutdown events for
> "extended" parts).
>
Make sense.
 
> Reported-by: Richard Woodruff <[email-masked]>
> Signed-off-by: Nishanth Menon <[email-masked]>
> Signed-off-by: Lokesh Vutla <[email-masked]>
> ---
Thanks for the fix.
Acked-by: Santosh Shilimkar <[email-masked]>