]> git.ipfire.org Git - people/ms/u-boot.git/commit - arch/arm/mach-tegra/clock.c
ARM: tegra: add APIs the clock uclass driver will need
authorStephen Warren <swarren@nvidia.com>
Tue, 13 Sep 2016 16:45:56 +0000 (10:45 -0600)
committerTom Warren <twarren@nvidia.com>
Tue, 27 Sep 2016 16:11:02 +0000 (09:11 -0700)
commitd0ad8a5cbfe8d52339ac5bea3617af21d2fd079a
treebd1c2c55ae9bc2b1cde71ec494ef7a910d4b8a07
parent6dbcc962e48e4f2395806469ba59f19fb18aa64a
ARM: tegra: add APIs the clock uclass driver will need

A future patch will implement a clock uclass driver for Tegra. That driver
will call into Tegra's existing clock code to simplify the transition;
this avoids tieing the clock uclass patches into significant refactoring
of the existing custom clock API implementation.

Some of the Tegra clock APIs that manipulate peripheral clocks require
both the peripheral clock ID and parent clock ID to be passed in together.
However, the clock uclass API does not require any such "parent"
parameter, so the clock driver must determine this information itself.
This patch implements new Tegra- specific clock API
clock_get_periph_parent() for this purpose.

The new API is implemented in the core Tegra clock code rather than SoC-
specific clock code. The implementation uses various SoC-/clock-specific
data. That data is only available in SoC-specific clock code.
Consequently, two new internal APIs are added that enable the core clock
code to retrieve this information from the SoC-specific clock code. Due to
the structure of the Tegra clock code, this leads to some unfortunate code
duplication. However, this situation predates this patch.

Ideally, future work will de-duplicate the Tegra clock code, and migrate
it into drivers/clk/tegra. However, such refactoring is kept separate from
this series.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Tom Warren <twarren@nvidia.com>
arch/arm/include/asm/arch-tegra/clock.h
arch/arm/mach-tegra/clock.c
arch/arm/mach-tegra/tegra114/clock.c
arch/arm/mach-tegra/tegra124/clock.c
arch/arm/mach-tegra/tegra20/clock.c
arch/arm/mach-tegra/tegra210/clock.c
arch/arm/mach-tegra/tegra30/clock.c