| Current File : //usr/src/linux-headers-6.8.0-60/drivers/clk/baikal-t1/Kconfig |
# SPDX-License-Identifier: GPL-2.0-only
config CLK_BAIKAL_T1
bool "Baikal-T1 Clocks Control Unit interface"
depends on (MIPS_BAIKAL_T1 && OF) || COMPILE_TEST
default MIPS_BAIKAL_T1
help
Clocks Control Unit is the core of Baikal-T1 SoC System Controller
responsible for the chip subsystems clocking and resetting. It
consists of multiple global clock domains, which can be reset by
means of the CCU control registers. These domains and devices placed
in them are fed with clocks generated by a hierarchy of PLLs,
configurable and fixed clock dividers. Enable this option to be able
to select Baikal-T1 CCU PLLs and Dividers drivers.
if CLK_BAIKAL_T1
config CLK_BT1_CCU_PLL
bool "Baikal-T1 CCU PLLs support"
select MFD_SYSCON
default MIPS_BAIKAL_T1
help
Enable this to support the PLLs embedded into the Baikal-T1 SoC
System Controller. These are five PLLs placed at the root of the
clocks hierarchy, right after an external reference oscillator
(normally of 25MHz). They are used to generate high frequency
signals, which are either directly wired to the consumers (like
CPUs, DDR, etc.) or passed over the clock dividers to be only
then used as an individual reference clock of a target device.
config CLK_BT1_CCU_DIV
bool "Baikal-T1 CCU Dividers support"
select MFD_SYSCON
default MIPS_BAIKAL_T1
help
Enable this to support the CCU dividers used to distribute clocks
between AXI-bus and system devices coming from CCU PLLs of Baikal-T1
SoC. CCU dividers can be either configurable or with fixed divider,
either gateable or ungateable. Some of the CCU dividers can be as well
used to reset the domains they're supplying clock to.
config CLK_BT1_CCU_RST
bool "Baikal-T1 CCU Resets support"
select RESET_CONTROLLER
select MFD_SYSCON
default MIPS_BAIKAL_T1
help
Enable this to support the CCU reset blocks responsible for the
AXI-bus and some subsystems reset. These are mainly the
self-deasserted reset controls but there are several lines which
can be directly asserted/de-asserted (PCIe and DDR sub-domains).
endif