Re: [PATCH 12/13] cpufreq: Add cpufreq driver for Tegra124

Andrew Bresticker
2014-07-11T16:33:51Z

On Fri, Jul 11, 2014 at 8:29 AM, Tuomas Tynkkynen <ttynkkynen@nvidia.com> wrote:
>
> On the hardware level, the two I2C controllers sharing the same pins
> have knowledge of each other and won't start transmitting if the bus
> is busy (something different from the usual I2C arbitration, that is).
> I guess on the kernel side there could be a problem if the voltage register
> is marked cached in the PMIC driver's regmap.

Yeah, in our tree we have a hack to disable regcache for SD0_VOLTAGE.
Other than the value reported to userspace being wrong, leaving it as
cacheable shouldn't be an issue if no other drivers try to read/write
that register.