Add apu core driver. The core driver will init the reset part of apu functions.
Signed-off-by: Flora Fu flora.fu@mediatek.com --- drivers/soc/mediatek/Kconfig | 18 +++++ drivers/soc/mediatek/apusys/Makefile | 3 + drivers/soc/mediatek/apusys/apu-core.c | 91 ++++++++++++++++++++++++++ drivers/soc/mediatek/apusys/apu-core.h | 11 ++++ 4 files changed, 123 insertions(+) create mode 100644 drivers/soc/mediatek/apusys/apu-core.c create mode 100644 drivers/soc/mediatek/apusys/apu-core.h
diff --git a/drivers/soc/mediatek/Kconfig b/drivers/soc/mediatek/Kconfig index d9bac2710494..074b0cf24c44 100644 --- a/drivers/soc/mediatek/Kconfig +++ b/drivers/soc/mediatek/Kconfig @@ -24,6 +24,24 @@ config MTK_APU_PM APU power domain shall be enabled before accessing the internal sub modules.
+config MTK_APU + tristate "MediaTek APUSYS Support" + select REGMAP + select MTK_APU_PM + select MTK_SCP + help + Say yes here to add support for the APU tinysys. The tinsys is + running on a micro processor in APU. + Its firmware is load and boot from Kernel side. Kernel and tinysys use + IPI to tx/rx messages. + +config MTK_APU_DEBUG + tristate "MediaTek APUSYS debug functions" + depends on MTK_APU + help + Say yes here to enalbe debug on APUSYS. + Disable it if you don't need them. + config MTK_CMDQ tristate "MediaTek CMDQ Support" depends on ARCH_MEDIATEK || COMPILE_TEST diff --git a/drivers/soc/mediatek/apusys/Makefile b/drivers/soc/mediatek/apusys/Makefile index 8821c0f0b7b7..6b5249ec7064 100644 --- a/drivers/soc/mediatek/apusys/Makefile +++ b/drivers/soc/mediatek/apusys/Makefile @@ -1,2 +1,5 @@ # SPDX-License-Identifier: GPL-2.0 obj-$(CONFIG_MTK_APU_PM) += mtk-apu-pm.o + +obj-$(CONFIG_MTK_APU) += apu.o +apu-objs += apu-core.o diff --git a/drivers/soc/mediatek/apusys/apu-core.c b/drivers/soc/mediatek/apusys/apu-core.c new file mode 100644 index 000000000000..c1db2394307f --- /dev/null +++ b/drivers/soc/mediatek/apusys/apu-core.c @@ -0,0 +1,91 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2021 MediaTek Inc. + */ + +#include <linux/debugfs.h> +#include <linux/kernel.h> +#include <linux/module.h> + +#include "apu-core.h" + +#define APUSYS_DEV_NAME "apusys" + +static struct apusys_core_info g_core_info; + +/* + * init function at other modulses + * call init function in order at apu.ko init stage + */ +static int (*apusys_init_func[])(struct apusys_core_info *) = { +}; + +/* + * exit function at other modulses + * call exit function in order at apu.ko exit stage + */ +static void (*apusys_exit_func[])(void) = { +}; + +static void create_dbg_root(void) +{ + g_core_info.dbg_root = debugfs_create_dir(APUSYS_DEV_NAME, NULL); + + /* check dbg root create status */ + if (IS_ERR_OR_NULL(g_core_info.dbg_root)) + pr_info("failed to create debug dir.\n"); +} + +static void destroy_dbg_root(void) +{ + debugfs_remove_recursive(g_core_info.dbg_root); +} + +static int __init apusys_init(void) +{ + int i, j, ret = 0; + int func_num = sizeof(apusys_init_func) / sizeof(int *); + + /* init apusys_dev */ + create_dbg_root(); + + /* call init func */ + for (i = 0; i < func_num; i++) { + if (!apusys_init_func[i]) + break; + + ret = apusys_init_func[i](&g_core_info); + if (ret) { + pr_info("init function(%d) fail(%d)", i, ret); + + /* exit device */ + for (j = i - 1; j >= 0; j--) + apusys_exit_func[j](); + + destroy_dbg_root(); + break; + } + } + + return 0; +} + +static void __exit apusys_exit(void) +{ + int func_num = sizeof(apusys_exit_func) / sizeof(int *); + int i; + + /* call release func */ + for (i = 0; i < func_num; i++) { + if (!apusys_exit_func[i]) + break; + + apusys_exit_func[i](); + } + + destroy_dbg_root(); +} + +module_init(apusys_init); +module_exit(apusys_exit); +MODULE_LICENSE("GPL"); diff --git a/drivers/soc/mediatek/apusys/apu-core.h b/drivers/soc/mediatek/apusys/apu-core.h new file mode 100644 index 000000000000..bac730bbc7ea --- /dev/null +++ b/drivers/soc/mediatek/apusys/apu-core.h @@ -0,0 +1,11 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (c) 2021 MediaTek Inc. + */ +#ifndef APU_CORE_H +#define APU_CORE_H + +struct apusys_core_info { + struct dentry *dbg_root; +}; +#endif