Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

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 0000000000..f0b1868303
--- /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