Simon Glass wrote at Thursday, January 12, 2012 4:17 PM:
On Tue, Jan 10, 2012 at 9:56 AM, Stephen Warren swarren@nvidia.com wrote:
On 12/26/2011 12:33 PM, Simon Glass wrote:
From: Jimmy Zhang jimmzhang@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@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".