[U-Boot] [PATCH 07/14] tegra: Add PMU to manage power supplies

[Stephen Warren]

Simon Glass wrote at Thursday, January 12, 2012 4:17 PM:
> On Tue, Jan 10, 2012 at 9:56 AM, Stephen Warren <swarren at nvidia.com> wrote:
> > On 12/26/2011 12:33 PM, Simon Glass wrote:
> >> From: Jimmy Zhang <jimmzhang at nvidia.com>
> >>
> >> Power supplies must be adjusted in line with clock frequency. This code
> >> provides a simple routine to set the voltage to allow operation at maximum
> >> frequency.
> >>
> >> Signed-off-by: Simon Glass <sjg at chromium.org>
> >> ---
> >>  arch/arm/cpu/armv7/tegra2/Makefile     |    1 +
> >>  arch/arm/cpu/armv7/tegra2/pmu.c        |  355 ++++++++++++++++++++++++++++++++
> >>  arch/arm/include/asm/arch-tegra2/pmu.h |   63 ++++++
> >>  3 files changed, 419 insertions(+), 0 deletions(-)
> >>  create mode 100644 arch/arm/cpu/armv7/tegra2/pmu.c
> >>  create mode 100644 arch/arm/include/asm/arch-tegra2/pmu.h
> >
> > This driver appears to be for an I2C-based device, so I assume it'd for
> > a particular PMIC not Tegra's PMC HW module. I imagine this is a driver
> > for the TI TPS6586X, right?
> >
> > As such, naming this "pmu" and putting it into the Tegra directory
> > doesn't make sense. There should be a generic TPS6586X driver, and
> > possibly a separate file and patch to implement the use of that chip in
> > conjunction with Tegra.
> 
> Oh dear, but yes you are right. It is a TPS658621C according to my
> schematic. I will leap into this also.

I believe some number of the devices are compatible, hence the kernel
has a tps6586x driver rather than more individual drivers for each
value of "x".

-- 
nvpublic