On Tue, 2018-12-11 at 01:34 -0800, Bin Meng wrote:
This adds U-Boot syscon driver for SiFive's Core Local Interruptor (CLINT). The CLINT block holds memory-mapped control and status registers associated with software and timer interrupts.
This driver implements the riscv_get_time() API as required by the generic RISC-V timer driver, as well as some other APIs that are needed for handling IPI.
Signed-off-by: Bin Meng bmeng.cn@gmail.com
Changes in v3:
- check return value of syscon_get_first_range()
Changes in v2:
- rename the driver name to sifive_clint
- save the clint base address to arch specific global data to support pre-relocation stage
- remove the probe routine
- add riscv_clear_ipi() API
arch/riscv/Kconfig | 9 ++++ arch/riscv/include/asm/global_data.h | 3 ++ arch/riscv/include/asm/syscon.h | 19 ++++++++ arch/riscv/lib/Makefile | 1 + arch/riscv/lib/sifive_clint.c | 84 ++++++++++++++++++++++++++++++++++++ 5 files changed, 116 insertions(+) create mode 100644 arch/riscv/include/asm/syscon.h create mode 100644 arch/riscv/lib/sifive_clint.c
Reviewed-by: Lukas Auer lukas.auer@aisec.fraunhofer.de