This driver does nothing but load its children for the moment. Should it be using regmap? I'm not sure how that fits into everything.
Signed-off-by: Sean Anderson seanga2@gmail.com --- Changes for v2: Removed spurious references to mach-k210. Don't load pre-relocation.
arch/riscv/Kconfig | 11 +++++++ arch/riscv/include/asm/k210_sysctl.h | 43 ++++++++++++++++++++++++++++ arch/riscv/lib/Makefile | 1 + arch/riscv/lib/k210_sysctl.c | 21 ++++++++++++++ board/sipeed/maix/Kconfig | 1 + 5 files changed, 77 insertions(+) create mode 100644 arch/riscv/include/asm/k210_sysctl.h create mode 100644 arch/riscv/lib/k210_sysctl.c
diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index 4c62b8dd77..677cdf5f24 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -196,6 +196,14 @@ config RISCV_RDTIME standard rdtime instruction. This is the case for S-mode U-Boot, and is useful for processors that support rdtime in M-mode too.
+config K210_SYSCTL + bool + select SYSCON + select SPL_SYSCON if SPL + help + The K210 sysctl block holds memory-mapped control and status + registers associated with clocks, resets, power, and dma handshakes. + config SYS_MALLOC_F_LEN default 0x1000
@@ -240,4 +248,7 @@ config STACK_SIZE_SHIFT config SPL_LDSCRIPT default "arch/riscv/cpu/u-boot-spl.lds"
+config ARCH_K210 + bool "Support Kendryte K210 SOCs" + endmenu diff --git a/arch/riscv/include/asm/k210_sysctl.h b/arch/riscv/include/asm/k210_sysctl.h new file mode 100644 index 0000000000..94170f4f31 --- /dev/null +++ b/arch/riscv/include/asm/k210_sysctl.h @@ -0,0 +1,43 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * Copyright (C) 2019 Sean Anderson seanga2@gmail.com + */ + +#ifndef K210_SYSCTL_H +#define K210_SYSCTL_H + +#include <linux/compiler.h> + +/* + * sysctl registers + * Taken from kendryte-standalone-sdk/lib/drivers/include/sysctl.h + */ +struct k210_sysctl { + u32 git_id; + u32 clk_freq; + u32 pll0; + u32 pll1; + u32 pll2; + u32 resv5; + u32 pll_lock; + u32 rom_error; + u32 clk_sel[2]; + u32 clk_en_cent; + u32 clk_en_peri; + u32 soft_reset; + u32 peri_reset; + u32 clk_thr[7]; + u32 misc; + u32 peri; + u32 spi_sleep; + u32 reset_status; + u32 dma_sel0; + u32 dma_sel1; + u32 power_sel; + u32 resv28; + u32 resv29; + u32 resv30; + u32 resv31; +} __packed; + +#endif /* K210_SYSCTL_H */ diff --git a/arch/riscv/lib/Makefile b/arch/riscv/lib/Makefile index c9179a5ff8..4c31e824d9 100644 --- a/arch/riscv/lib/Makefile +++ b/arch/riscv/lib/Makefile @@ -14,6 +14,7 @@ ifeq ($(CONFIG_$(SPL_)RISCV_MMODE),y) obj-$(CONFIG_SIFIVE_CLINT) += sifive_clint.o obj-$(CONFIG_ANDES_PLIC) += andes_plic.o obj-$(CONFIG_ANDES_PLMT) += andes_plmt.o +obj-$(CONFIG_K210_SYSCTL) += k210_sysctl.o else obj-$(CONFIG_RISCV_RDTIME) += rdtime.o obj-$(CONFIG_SBI_IPI) += sbi_ipi.o diff --git a/arch/riscv/lib/k210_sysctl.c b/arch/riscv/lib/k210_sysctl.c new file mode 100644 index 0000000000..db2e79c974 --- /dev/null +++ b/arch/riscv/lib/k210_sysctl.c @@ -0,0 +1,21 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2019 Sean Anderson seanga2@gmail.com + */ +#include <asm/k210_sysctl.h> + +#include <dm.h> + +static const struct udevice_id k210_sysctl_ids[] = { + { .compatible = "kendryte,k210-sysctl", }, + { } +}; + +U_BOOT_DRIVER(k210_sysctl) = { + .name = "k210_sysctl", + .id = UCLASS_SYSCON, +#if !CONFIG_IS_ENABLED(OF_PLATDATA) + .bind = dm_scan_fdt_dev, +#endif + .of_match = k210_sysctl_ids, +}; diff --git a/board/sipeed/maix/Kconfig b/board/sipeed/maix/Kconfig index efeaddf317..9ffd3aa7aa 100644 --- a/board/sipeed/maix/Kconfig +++ b/board/sipeed/maix/Kconfig @@ -36,6 +36,7 @@ config BOARD_SPECIFIC_OPTIONS select ENV_IS_NOWHERE select SYS_RISCV_NOCOUNTER imply SIFIVE_CLINT + imply K210_SYSCTL imply SPI imply DM_GPIO imply CMD_GPIO