clk: Add clock driver for the RISC-V RPMI clock service group

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The RPMI specification defines a clock service group which can be
accessed via SBI MPXY extension or dedicated S-mode RPMI transport.

Add mailbox client based clock driver for the RISC-V RPMI clock
service group.

Reviewed-by: Stephen Boyd <sboyd@kernel.org>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Co-developed-by: Anup Patel <apatel@ventanamicro.com>
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Signed-off-by: Rahul Pathak <rpathak@ventanamicro.com>
Link: https://lore.kernel.org/r/20250818040920.272664-11-apatel@ventanamicro.com
[pjw@kernel.org: converted rpmi_clkrate_u64 macro to a function; replaced bare constant with a macro]
Signed-off-by: Paul Walmsley <pjw@kernel.org>

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Rahul Pathak 2025-08-18 09:39:06 +05:30 • committed by Paul Walmsley

parent b385830290

commit 5ba9f520f4

4 changed files with 645 additions and 0 deletions

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8

drivers/clk/Kconfig

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1

drivers/clk/Makefile

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620

drivers/clk/clk-rpmi.c

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16

include/linux/mailbox/riscv-rpmi-message.h

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