clk: Add SiFive FU540 PRCI clock driver
Add driver code for the SiFive FU540 PRCI IP block. This IP block
handles reset and clock control for the SiFive FU540 device and
implements SoC-level clock tree controls and dividers.
Based on code written by Wesley Terpstra <wesley@sifive.com>
found in commit 999529edf517ed75b56659d456d221b2ee56bb60 of:
https://github.com/riscv/riscv-linux
Boot and PLL rate change were tested on a SiFive HiFive Unleashed
board.
Signed-off-by: Paul Walmsley <paul.walmsley@sifive.com>
Signed-off-by: Atish Patra <atish.patra@wdc.com>
Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Alexander Graf <agraf@suse.de>
diff --git a/drivers/clk/sifive/Kconfig b/drivers/clk/sifive/Kconfig
new file mode 100644
index 0000000..81fc9f8
--- /dev/null
+++ b/drivers/clk/sifive/Kconfig
@@ -0,0 +1,19 @@
+# SPDX-License-Identifier: GPL-2.0
+
+config CLK_ANALOGBITS_WRPLL_CLN28HPC
+ bool
+
+config CLK_SIFIVE
+ bool "SiFive SoC driver support"
+ depends on CLK
+ help
+ SoC drivers for SiFive Linux-capable SoCs.
+
+config CLK_SIFIVE_FU540_PRCI
+ bool "PRCI driver for SiFive FU540 SoCs"
+ depends on CLK_SIFIVE
+ select CLK_ANALOGBITS_WRPLL_CLN28HPC
+ help
+ Supports the Power Reset Clock interface (PRCI) IP block found in
+ FU540 SoCs. If this kernel is meant to run on a SiFive FU540 SoC,
+ enable this driver.