[0/2] clk: keystone: Add new driver to handle syscon based clock

Message

Vignesh Raghavendra March 12, 2019, 9:05 a.m. UTC

On TI's K2 and K3 SoCs, certain clocks can be gated/ungated by setting a
single bit in SoC's System Control registers. Sometime more than
one clock control can be in the same register. But these registers might
also have bits to control other SoC functionalities.
For example, Time Base clock(tbclk) enable bits for various EPWM IPs are
all in EPWM_CTRL Syscon registers on K2G SoC.

This series adds a new clk driver to support such clocks. Registers
which control clocks will be grouped into a syscon DT node, thus
enabling sharing of register across clk drivers and other drivers.
Each clock node will be child of the syscon node describing offset and
bit within the regmap that controls the clock output.


Vignesh Raghavendra (2):
  dt-bindings: clock: Add binding documentation for TI syscon gate clock
  clk: keystone: Add new driver to handle syscon based clock

 .../bindings/clock/ti,syscon-gate-clock.txt   |  35 +++++
 drivers/clk/keystone/Kconfig                  |   8 +
 drivers/clk/keystone/Makefile                 |   1 +
 drivers/clk/keystone/syscon-clk.c             | 143 ++++++++++++++++++
 4 files changed, 187 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/clock/ti,syscon-gate-clock.txt
 create mode 100644 drivers/clk/keystone/syscon-clk.c