On Mon, Jan 18, 2016 at 10:40:59AM +0100, Marcus Weseloh wrote:
> Hi,
>
> 2016-01-17 19:51 GMT+01:00 Maxime Ripard :
> > On Sun, Jan 10, 2016 at 10:11:11PM +0100, Marcus Weseloh wrote:
> >> >> >> - /* Ensure that we have a parent clock fast enough */
> >> >> >> + /*
> >> >> >> + * Ens
Hi again,
2015-12-28 0:29 GMT+01:00 Marcus Weseloh :
> 2015-12-27 22:09 GMT+01:00 Maxime Ripard :
[...]
> [...]
>>> - /* Ensure that we have a parent clock fast enough */
>>> + /*
>>> + * Ensure that the parent clock is set to twice the max speed
>>> + * of the spi device (possib
Hi,
2015-12-27 22:09 GMT+01:00 Maxime Ripard :
> On Sat, Dec 26, 2015 at 04:53:05PM +0100, Marcus Weseloh wrote:
>> This patch fixes multiple problems with the current clock calculations:
>>
>> 1. The A10/A20 datasheet contains the formula AHB_CLK / (2^(n+1)) to
>> calculate SPI_CLK from CDR1, but
On Sat, Dec 26, 2015 at 04:53:05PM +0100, Marcus Weseloh wrote:
> This patch fixes multiple problems with the current clock calculations:
>
> 1. The A10/A20 datasheet contains the formula AHB_CLK / (2^(n+1)) to
> calculate SPI_CLK from CDR1, but this formula is wrong. The actual
> formula - determ
This patch fixes multiple problems with the current clock calculations:
1. The A10/A20 datasheet contains the formula AHB_CLK / (2^(n+1)) to
calculate SPI_CLK from CDR1, but this formula is wrong. The actual
formula - determined by analyzing the actual waveforms - is
AHB_CLK / (2^n).
2. The divis
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