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| author | Clement Leger <cleger@kalray.eu> | 2020-04-04 22:29:08 +0200 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2020-04-15 08:40:34 +0200 |
| commit | 83040a72125f3f0211fbc9d237f8567e3022ef3c (patch) | |
| tree | de1d4b3625fc0607d4c600f8736ac0d50c5be436 /arch/kvx | |
| parent | b9f8a97e130769a1d00c6461013cd1e48e42361c (diff) | |
| download | barebox-83040a72125f3f0211fbc9d237f8567e3022ef3c.tar.gz barebox-83040a72125f3f0211fbc9d237f8567e3022ef3c.tar.xz | |
kvx: Implement reset source and reset
Implement reset and reset source handling using ftu. This support uses
regmap to access the ftu easily using "kalray,kvx-syscon" compatible.
Signed-off-by: Clement Leger <cleger@kalray.eu>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'arch/kvx')
| -rw-r--r-- | arch/kvx/Kconfig | 2 | ||||
| -rw-r--r-- | arch/kvx/configs/generic_defconfig | 1 | ||||
| -rw-r--r-- | arch/kvx/cpu/Makefile | 2 | ||||
| -rw-r--r-- | arch/kvx/cpu/reset.c | 67 | ||||
| -rw-r--r-- | arch/kvx/include/asm/ftu.h | 24 |
5 files changed, 95 insertions, 1 deletions
diff --git a/arch/kvx/Kconfig b/arch/kvx/Kconfig index 5af94cca77..5463bb4f14 100644 --- a/arch/kvx/Kconfig +++ b/arch/kvx/Kconfig @@ -7,9 +7,11 @@ config KVX select FLEXIBLE_BOOTARGS select GENERIC_FIND_NEXT_BIT select LIBFDT + select MFD_SYSCON select OF_BAREBOX_DRIVERS select OFDEVICE select PARTITION + select RESET_SOURCE default y config PHYS_ADDR_T_64BIT diff --git a/arch/kvx/configs/generic_defconfig b/arch/kvx/configs/generic_defconfig index 535f1cf8be..3f7bb0f195 100644 --- a/arch/kvx/configs/generic_defconfig +++ b/arch/kvx/configs/generic_defconfig @@ -4,6 +4,7 @@ CONFIG_BAUDRATE=115200 CONFIG_CMD_CMP=y CONFIG_CMD_OF_DUMP=y CONFIG_CMD_POWEROFF=y +CONFIG_CMD_RESET=y CONFIG_CONSOLE_RATP=y CONFIG_DRIVER_SERIAL_NS16550=y CONFIG_PINCTRL_SINGLE=y diff --git a/arch/kvx/cpu/Makefile b/arch/kvx/cpu/Makefile index 1d06352061..4a140ffd1b 100644 --- a/arch/kvx/cpu/Makefile +++ b/arch/kvx/cpu/Makefile @@ -3,5 +3,5 @@ # Copyright (C) 2019 Kalray Inc. # -obj-y += start.o cpu.o exception.o +obj-y += start.o cpu.o exception.o reset.o extra-y += barebox.lds diff --git a/arch/kvx/cpu/reset.c b/arch/kvx/cpu/reset.c new file mode 100644 index 0000000000..c7f2018e00 --- /dev/null +++ b/arch/kvx/cpu/reset.c @@ -0,0 +1,67 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (C) 2020 Kalray Inc. + */ + +#include <common.h> +#include <reset_source.h> +#include <mfd/syscon.h> +#include <restart.h> +#include <regmap.h> +#include <init.h> + +#include <asm/ftu.h> + +static struct regmap *ftu_regmap; + +static void __noreturn kvx_restart_soc(struct restart_handler *rst) +{ + regmap_write(ftu_regmap, KVX_FTU_SW_RESET_OFFSET, 0x1); + + /* Not reached */ + hang(); +} + + +static int kvx_reset_init(void) +{ + int ret; + u32 rst_cause; + + ftu_regmap = syscon_regmap_lookup_by_compatible("kalray,kvx-syscon"); + if (IS_ERR(ftu_regmap)) + return PTR_ERR(ftu_regmap); + + ret = regmap_read(ftu_regmap, KVX_FTU_RESET_CAUSE_OFFSET, &rst_cause); + if (ret < 0) { + reset_source_set(RESET_UKWN); + return ret; + } + + switch (rst_cause) { + case KVX_FTU_RESET_CAUSE_CODE_DSU: + reset_source_set(RESET_JTAG); + break; + case KVX_FTU_RESET_CAUSE_CODE_SW: + reset_source_set(RESET_RST); + break; + case KVX_FTU_RESET_CAUSE_CODE_MPPA: + reset_source_set(RESET_POR); + break; + case KVX_FTU_RESET_CAUSE_CODE_PCIE: + reset_source_set(RESET_EXT); + break; + case KVX_FTU_RESET_CAUSE_CODE_WDOG_0: + case KVX_FTU_RESET_CAUSE_CODE_WDOG_1: + case KVX_FTU_RESET_CAUSE_CODE_WDOG_2: + case KVX_FTU_RESET_CAUSE_CODE_WDOG_3: + case KVX_FTU_RESET_CAUSE_CODE_WDOG_4: + reset_source_set(RESET_WDG); + break; + } + + restart_handler_register_fn(kvx_restart_soc); + + return 0; +} +device_initcall(kvx_reset_init); diff --git a/arch/kvx/include/asm/ftu.h b/arch/kvx/include/asm/ftu.h new file mode 100644 index 0000000000..4bc935721d --- /dev/null +++ b/arch/kvx/include/asm/ftu.h @@ -0,0 +1,24 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (C) 2019 Kalray Inc. + */ + +#ifndef _ASM_KVX_FTU_H +#define _ASM_KVX_FTU_H + +/* FTU reset cause register definitions */ +#define KVX_FTU_RESET_CAUSE_OFFSET 0x48 +#define KVX_FTU_RESET_CAUSE_CODE_MPPA 0x0 +#define KVX_FTU_RESET_CAUSE_CODE_DSU 0x1 +#define KVX_FTU_RESET_CAUSE_CODE_SW 0x2 +#define KVX_FTU_RESET_CAUSE_CODE_PCIE 0x3 +#define KVX_FTU_RESET_CAUSE_CODE_WDOG_0 0x8 +#define KVX_FTU_RESET_CAUSE_CODE_WDOG_1 0x9 +#define KVX_FTU_RESET_CAUSE_CODE_WDOG_2 0xA +#define KVX_FTU_RESET_CAUSE_CODE_WDOG_3 0xB +#define KVX_FTU_RESET_CAUSE_CODE_WDOG_4 0xC + +/* FTU reset register definitions */ +#define KVX_FTU_SW_RESET_OFFSET 0x50 + +#endif /* _ASM_KVX_FTU_H */ |