[lkml]   [2013]   [Jan]   [3]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [PATCH v2 05/11] ARM: dt: tegra30: Add device node for APB MISC
On 01/02/2013 11:11 PM, Prashant Gaikwad wrote:
> On Thursday 03 January 2013 03:30 AM, Stephen Warren wrote:
>> On 12/27/2012 07:47 AM, Prashant Gaikwad wrote:
>>> APB misc contains multiple registers required by different modules
>>> such as CAR.
>> I don't see a DT binding document that describes what
>> nvidia,tegra30-apbmisc means. Also, the register range for this new node
>> overlaps that for the pinmux node, so they can't both "request" their
>> register region. You may need multiple entries in the apbmisc reg
>> property to avoid this.
> apbmisc reg for Tegra30 can be divided into following entries:
> strap registers
> jtag configuration registers
> pull_up/pull_down control registers
> vclk control registers
> tvdac registers
> chip id revision registers
> pad control registers
> This list is not same for Tegra20 and Tegra30.

OK. It sounds like we need a true APB MISC driver then, to abstract the
differences; the clock driver really shouldn't be touching the APB MISC
registers in all likelihood, unless a subset of the sections you mention
above are truly dedicated to clock functionality.

> OR
> another way is to add chip id revision register region to CAR node as
> done for pinmux node and remove apb misc node.

The pinmux controller doesn't have a reg entry for the chip ID register.
I don't understand what you mean here.

 \ /
  Last update: 2013-01-03 17:41    [W:0.067 / U:0.276 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site