Re: [RESEND 0/3] mfd: twl6040: Updates for i2s speed and fix for chip deadlock

Peter Ujfalusi
2014-04-24T09:12:36Z

Lee,

On 04/01/2014 04:44 PM, Peter Ujfalusi wrote:
> Hi,
>
> While looking into a report by Florian Vaussard [1] I have noticed couple of most
> likely unrelated issues:
> - all boards using twl6040 configures the i2c bus to 400KHz while twl6040 is set
> to 100KHz as default.
> - if I set the audpwron GPIO high [2] in the bootloader the i2c communication towards
> twl6040 will be broken
> - got confirmation from HW design teams that twl6040 can work on a bus with
> 400KHz even if after hard reset but it is optimal to swithc to 400KHz mode as
> soon as possible.
>
> The solution or these are:
> set the twl6040 to i2c fast mode with regmap patch
> Clear the INTID register right after we request the audpwron GPIO and set it to
> low.

Do you want me to resend this series again?

Thanks,
Péter

>
> Generated on top of:
> git://git.linaro.org/people/lee.jones/mfd.git for-mfd-next
>
> Tested on PandaBoard, PandaBoardES, OMAP4-blaze (SDP)
>
> [1] http://www.spinics.net/lists/arm-kernel/msg310725.html
> [2] Command in u-boot to enable the audpwron on PandaBoards: gpio set 127
>
> Regards,
> Peter
> ---
> Peter Ujfalusi (3):
> mfd: twl6040: Select i2c fast mode as default with regmap patch
> mfd: twl6040: Move register patching earlier in probe
> mfd: twl6040: Clear the interrupt ID register before requesting IRQ
>
> drivers/mfd/twl6040.c | 19 +++++++++++++------
> include/linux/mfd/twl6040.h | 1 +
> 2 files changed, 14 insertions(+), 6 deletions(-)
>