From 6277c3cd74f54c26bf4d5e88182a378ee7190d90 Mon Sep 17 00:00:00 2001 From: Ronald Claveau Date: Thu, 17 Sep 2026 09:59:00 +0200 Subject: [PATCH] mfd: khadas-mcu: Add per-variant configuration infrastructure and VIM4 support Some values change per variant, add the structure to manage it. Add VIM4 specific registers done for a subsequent patch, which will use a new compatible especially to get the right regmap config. Add an enum khadas_mcu_type used as value to match. Also fix a kernel-doc warning for the khadas_mcu struct. Reviewed-by: Neil Armstrong Signed-off-by: Ronald Claveau Link: https://patch.msgid.link/20260917-add-mcu-fan-khadas-vim4-v12-1-497cd543a148@aliel.fr Signed-off-by: Lee Jones --- include/linux/mfd/khadas-mcu.h | 19 ++++++++++++++++++- 1 file changed, 18 insertions(+), 1 deletion(-) diff --git a/include/linux/mfd/khadas-mcu.h b/include/linux/mfd/khadas-mcu.h index a99ba2ed0e4e..acd3291061b4 100644 --- a/include/linux/mfd/khadas-mcu.h +++ b/include/linux/mfd/khadas-mcu.h @@ -70,6 +70,13 @@ #define KHADAS_MCU_WOL_INIT_START_REG 0x87 /* WO */ #define KHADAS_MCU_CMD_FAN_STATUS_CTRL_REG 0x88 /* WO */ +/* VIM4 specific registers */ +#define KHADAS_MCU_VIM4_REST_CONF_REG 0x2c /* WO - reset EEPROM */ +#define KHADAS_MCU_VIM4_LED_ON_RAM_REG 0x89 /* WO - LED volatile */ +#define KHADAS_MCU_VIM4_FAN_CTRL_REG 0x8a /* WO */ +#define KHADAS_MCU_VIM4_WDT_EN_REG 0x8b /* WO */ +#define KHADAS_MCU_VIM4_SYS_RST_REG 0x91 /* WO */ + enum { KHADAS_BOARD_VIM1 = 0x1, KHADAS_BOARD_VIM2, @@ -80,7 +87,7 @@ enum { /** * struct khadas_mcu - Khadas MCU structure - * @device: device reference used for logs + * @dev: device reference used for logs * @regmap: register map */ struct khadas_mcu { @@ -88,4 +95,14 @@ struct khadas_mcu { struct regmap *regmap; }; +/** + * enum khadas_mcu_type - Khadas MCU hardware variant + * @KHADAS_MCU_GENERIC: VIM1, VIM2, VIM3, Edge, Edge-V (shared register map) + * @KHADAS_MCU_VIM4: VIM4 (extended register map, distinct fan/LED/WDT regs) + */ +enum khadas_mcu_type { + KHADAS_MCU_GENERIC = 1, + KHADAS_MCU_VIM4, +}; + #endif /* MFD_KHADAS_MCU_H */