[PATCH 1/3] ARM: OMAP4: VC: fix I2C timing

[khilman@ti.com (Kevin Hilman)]

Tero Kristo <t-kristo@ti.com> writes:

> Current I2C timing parameters do not work with Panda board at least.
> Parameters updated based on TI recommendation.
>
> Signed-off-by: Tero Kristo <t-kristo@ti.com>

Let's fix this correctly by deriving/calculating them from the proper
source clocks.

Otherwise, this is going to work for Panda and break for something else.

Kevin

> ---
>  arch/arm/mach-omap2/vc.c |    4 +++-
>  1 files changed, 3 insertions(+), 1 deletions(-)
>
> diff --git a/arch/arm/mach-omap2/vc.c b/arch/arm/mach-omap2/vc.c
> index 1fd976e..a731400 100644
> --- a/arch/arm/mach-omap2/vc.c
> +++ b/arch/arm/mach-omap2/vc.c
> @@ -585,7 +585,9 @@ static void __init omap4_vc_init_channel(struct voltagedomain *voltdm)
>  	omap4_set_timings(voltdm, true);
>  
>  	/* XXX These are magic numbers and do not belong! */
> -	vc_val = (0x60 << OMAP4430_SCLL_SHIFT | 0x26 << OMAP4430_SCLH_SHIFT);
> +	vc_val = (0x28 << OMAP4430_SCLL_SHIFT | 0x2c << OMAP4430_SCLH_SHIFT);
> +	vc_val |= (0x0b << OMAP4430_HSSCLL_SHIFT);
> +	vc_val |= (0x0 << OMAP4430_HSSCLH_SHIFT);
>  	voltdm->write(vc_val, OMAP4_PRM_VC_CFG_I2C_CLK_OFFSET);
>  }