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Wysocki" Cc: Palmer Dabbelt , Paul Walmsley , Alexandre Ghiti , Len Brown , Atish Patra , Andrew Jones , Anup Patel , Will Deacon , Mark Rutland , linux-acpi@vger.kernel.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, Anup Patel Subject: [PATCH 0/2] Common csr_read_num() and csr_write_num() for RISC-V Date: Fri, 15 Aug 2025 21:44:04 +0530 Message-ID: <20250815161406.76370-1-apatel@ventanamicro.com> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Some of the RISC-V drivers (such as RISC-V PMU and ACPI CPPC) need to access CSR based on CSR number discovered from somewhere. Add common RISC-V csr_read_num() and csr_write_num() functions under arch/riscv for such drivers. These patches can be found in the riscv_csr_read_num_v1 branch at: https://github.com/avpatel/linux.git Anup Patel (2): ACPI: RISC-V: Fix FFH_CPPC_CSR error handling RISC-V: Add common csr_read_num() and csr_write_num() functions arch/riscv/include/asm/csr.h | 3 + arch/riscv/kernel/Makefile | 1 + arch/riscv/kernel/csr.c | 177 +++++++++++++++++++++++++++++++++++ drivers/acpi/riscv/cppc.c | 21 ++--- drivers/perf/riscv_pmu.c | 43 +-------- 5 files changed, 191 insertions(+), 54 deletions(-) create mode 100644 arch/riscv/kernel/csr.c -- 2.43.0