RE: [PATCHv2 RESEND] i2c: designware-pci: set ideal HCNT, LCNT and SDA hold time value

From: Chew, Chiau Ee
Date: Mon Mar 10 2014 - 23:39:41 EST



> Subject: [PATCHv2 RESEND] i2c: designware-pci: set ideal HCNT, LCNT and SDA
> hold time value
>
> From: Chew, Chiau Ee <chiau.ee.chew@xxxxxxxxx>
>
> On Intel BayTrail, there was case whereby the resulting fast mode bus speed
> becomes slower (~20% slower compared to expected speed) if using the
> HCNT/LCNT calculated in the core layer. Thus, this patch is added to allow pci
> glue layer to pass in optimal HCNT/LCNT/SDA hold time values to core layer
> since the core layer supports cofigurable HCNT/LCNT/SDA hold time values
> now.
>
> Signed-off-by: Chew, Chiau Ee <chiau.ee.chew@xxxxxxxxx>
> ---
> v2 changelog:
> * Add 'dw_' prefix to struct scl_sda_cfg
> * Add Baytrail HCNT/LCNT/SDA hold time values directly in the
> struct instead of using macro definition
> * Replace tab before "=" with space in struct
>
> drivers/i2c/busses/i2c-designware-pcidrv.c | 28
> ++++++++++++++++++++++++++++
> 1 files changed, 28 insertions(+), 0 deletions(-)
>

I have misplaced the changelog in the previous v2 patch which would cause the removal of signed-off-by line. I'm resending this to fix that problem. Sorry for any confusion and inconvenience caused.


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