linux-kernel - [PATCH 4/5] cpufreq: Add support for RISC-V CPU Frequency scaling drivers

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Date:   Thu, 14 Dec 2023 11:33:41 +0100
From:   Brandon Cheo Fusi <fusibrandon13@...il.com>
To:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Chen-Yu Tsai <wens@...e.org>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        Samuel Holland <samuel@...lland.org>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        "Rafael J . Wysocki" <rafael@...nel.org>,
        Viresh Kumar <viresh.kumar@...aro.org>,
        Yangtao Li <tiny.windzz@...il.com>
Cc:     devicetree@...r.kernel.org, linux-riscv@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-sunxi@...ts.linux.dev,
        linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
        Brandon Cheo Fusi <fusibrandon13@...il.com>
Subject: [PATCH 4/5] cpufreq: Add support for RISC-V CPU Frequency scaling drivers

Add Kconfig file for cpufreq scaling drivers that can handle RISC-V
CPUs. An entry is included for the Allwinner H6 cpufreq driver that
works with D1.

Signed-off-by: Brandon Cheo Fusi <fusibrandon13@...il.com>
---
 drivers/cpufreq/Kconfig       |  4 ++++
 drivers/cpufreq/Kconfig.riscv | 16 ++++++++++++++++
 2 files changed, 20 insertions(+)
 create mode 100644 drivers/cpufreq/Kconfig.riscv

diff --git a/drivers/cpufreq/Kconfig b/drivers/cpufreq/Kconfig
index 35efb53d5..4bef39fed 100644
--- a/drivers/cpufreq/Kconfig
+++ b/drivers/cpufreq/Kconfig
@@ -239,6 +239,10 @@ if PPC32 || PPC64
 source "drivers/cpufreq/Kconfig.powerpc"
 endif
 
+if RISCV
+source "drivers/cpufreq/Kconfig.riscv"
+endif
+
 if MIPS
 config BMIPS_CPUFREQ
 	tristate "BMIPS CPUfreq Driver"
diff --git a/drivers/cpufreq/Kconfig.riscv b/drivers/cpufreq/Kconfig.riscv
new file mode 100644
index 000000000..025c7c439
--- /dev/null
+++ b/drivers/cpufreq/Kconfig.riscv
@@ -0,0 +1,16 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# RISC-V CPU Frequency scaling drivers
+#
+
+config ALLWINNER_SUN50I_CPUFREQ_NVMEM
+	tristate "Allwinner nvmem based SUN50I CPUFreq driver"
+	depends on ARCH_SUNXI
+	depends on NVMEM_SUNXI_SID
+	select PM_OPP
+	help
+	  This adds the nvmem based CPUFreq driver for Allwinner
+	  H6/D1 SoCs.
+
+	  To compile this driver as a module, choose M here: the
+	  module will be called sun50i-cpufreq-nvmem.
\ No newline at end of file
-- 
2.30.2