summaryrefslogtreecommitdiffstats
path: root/drivers/clk/baikal-t1/Kconfig
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--drivers/clk/baikal-t1/Kconfig52
1 files changed, 52 insertions, 0 deletions
diff --git a/drivers/clk/baikal-t1/Kconfig b/drivers/clk/baikal-t1/Kconfig
new file mode 100644
index 000000000..f0b186830
--- /dev/null
+++ b/drivers/clk/baikal-t1/Kconfig
@@ -0,0 +1,52 @@
+# 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