Re: I2C TWL4030 Keypad

[Ram <vshrirama@gmail.com>]

Hi,
Keypad driver seems to be okay.
I tried with RTC driver too. I still get the same error.

I feel it is something to do with twl_core driver - the way interrupts
are handled.


i will look into what you have mentioned.

Regards,
sriram





On 2/26/07, Cantu Castillo, Arturo <x0052731@ti.com> wrote:
> Hi Ram,
> It might be happening that when the driver is initialized the i2c
> writing to TWL4030_MODULE_KEYPAD register that is done to enable
> interrupts is failing (since you are saying that i2c readings/writings
> are failing randomly it is likely), you can try to read this register
> and find out if the interrupts are enable.
>
> Also you can check that all the registers that are set in the
> initialization routine have the proper value, if i2c writings are
> failing randomly, some of them might not be initialized correctly.
>
> Regards,
> Arturo
> -----Original Message-----
> From: linux-omap-open-source-bounces+x0052731=ti.com@linux.omap.com
> [mailto:linux-omap-open-source-bounces+x0052731=ti.com@linux.omap.com]
> On Behalf Of Ram
> Sent: Friday, February 16, 2007 5:25 AM
> To: linux-omap-open-source@linux.omap.com
> Subject: I2C TWL4030 Keypad
>
> Hi,
>    Im using omap2430 SDP.
>    Im trying to get TWL4030 Keypad to work on 2.6.19. Im using 2.6.14
> for
> omap2430 as a reference.
>
>    Im using the following files:
>         1) i2c-omap.c which exists on 2.6.19
>         2) twl4030_core.c
>         3) twl4030_gpio.c (taken from 2.6.14)
>         4) omap-twl4030keypad.c (taken from 2.6.14)
>
>    made  changes  to support generic interrupts in 2.6.19.
>
>    Im able to read the value of registers using  twl4030_kpread_u8
>     TWL4030_MODULE_KEYPAD, REG_KEYP_EDR, REG_LK_PTV_REG,
> REG_KEY_DEB_REG,
> REG_LONG_KEY_REG1, REG_KEYP_SIH_CTRL, REG_KEYP_IMR1
>
>   However, im not able to recieve interrupts. upon pressing keys in
> keypad.
> i dont observe
>   any change in interrupts count. when i do a cat /proc/interrupts.
>
> Im not sure if im missing something.
>
>
>   I also observe randomly (say 3 out of 10 times), my i2c bus times out
> and
> im unable to read or write TWL4030 registers. i get an return value of
> -110.
>
> i2c_omap i2c_omap.2: timeout waiting for bus ready
>
> Please Advice,
>
> Regards,
> sriram
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