u-boot.git/drivers/clk/Makefile, branch v2016.07

clk: convert API to match reset/mailbox style

2016-06-19T23:05:55+00:00

The following changes are made to the clock API:
* The concept of "clocks" and "peripheral clocks" are unified; each clock
  provider now implements a single set of clocks. This provides a simpler
  conceptual interface to clients, and better aligns with device tree
  clock bindings.
* Clocks are now identified with a single "struct clk", rather than
  requiring clients to store the clock provider device and clock identity
  values separately. For simple clock consumers, this isolates clients
  from internal details of the clock API.
* clk.h is split so it only contains the client/consumer API, whereas
  clk-uclass.h contains the provider API. This aligns with the recently
  added reset and mailbox APIs.
* clk_ops .of_xlate(), .request(), and .free() are added so providers
  can customize these operations if needed. This also aligns with the
  recently added reset and mailbox APIs.
* clk_disable() is added.
* All users of the current clock APIs are updated.
* Sandbox clock tests are updated to exercise clock lookup via DT, and
  clock enable/disable.
* rkclk_get_clk() is removed and replaced with standard APIs.

Buildman shows no clock-related errors for any board for which buildman
can download a toolchain.

test/py passes for sandbox (which invokes the dm clk test amongst
others).

Signed-off-by: Stephen Warren 
Acked-by: Simon Glass

clk: exynos: add clock driver for Exynos7420 Soc

2016-05-25T01:00:18+00:00

Add a clock driver for Exynos7420 SoC. There are about 25 clock controller
blocks in Exynos7420 out of which support for topc, top0 and peric1 blocks
are added in this initial version of the driver.

Cc: Minkyu Kang 
Cc: Simon Glass 
Signed-off-by: Thomas Abraham 
Reviewed-by: Simon Glass 
Signed-off-by: Minkyu Kang

clk: uniphier: add Media I/O clock driver for UniPhier SoCs

2016-02-14T07:36:13+00:00

This is the initial commit for the UniPhier clock drivers.
Currently, only the Media I/O clock is supported.

Signed-off-by: Masahiro Yamada

drivers: clk: Add clock driver for Microchip PIC32 Microcontroller.

2016-02-01T21:14:00+00:00

PIC32 clock module consists of multiple oscillators, PLLs, mutiplexers
and dividers capable of supplying clock to various controllers
on or off-chip.

Signed-off-by: Purna Chandra Mandal 
Reviewed-by: Simon Glass 
Reviewed-by: Daniel Schwierzeck

clk: add fixed rate clock driver

2016-01-22T02:46:47+00:00

This commit intends to implement "fixed-clock" as in Linux.
(drivers/clk/clk-fixed-rate.c in Linux)

If you need a very simple clock to just provide fixed clock rate
like a crystal oscillator, you do not have to write a new driver.
This driver can support it.

Signed-off-by: Masahiro Yamada 
Acked-by: Simon Glass

rockchip: rk3036: Add clock driver

2015-12-01T15:07:22+00:00

Add a driver for setting up and modifying the various PLLs, peripheral
clocks and mmc clocks on RK3036

Signed-off-by: Lin Huang 
Acked-by: Simon Glass

rockchip: rk3288: Add clock driver

2015-09-03T03:28:23+00:00

Add a driver for setting up and modifying the various PLLs and peripheral
clocks on the RK3288.

Signed-off-by: Simon Glass

dm: test: Add tests for the clk uclass

2015-07-21T23:39:30+00:00

Add tests of each API call using a sandbox clock device.

Signed-off-by: Simon Glass

dm: Add a clock uclass

2015-07-21T23:39:29+00:00

Clocks are an important feature of platforms and have become increasing
complex with time. Most modern SoCs have multiple PLLs and dozens of clock
dividers which distribute clocks to on-chip peripherals.

Some SoC implementations have a clock API which is private to that SoC family,
e.g. Tegra and Exynos. This is useful but it would be better to have a
common API that can be understood and used throughout U-Boot.

Add a simple clock API as a starting point. It supports querying and setting
the rate of a clock. Each clock is a device. To reduce memory and processing
overhead the concept of peripheral clocks is provided. These do not need to
be explicit devices - it is possible to write a driver that can adjust the
I2C clock (for example) without an explicit I2C clock device. This can
dramatically reduce the number of devices (and associated overhead) in a
complex SoC.

Clocks are referenced by a number, and it is expected that SoCs will define
that numbering themselves via an enum.

Signed-off-by: Simon Glass