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mfd: khadas-mcu: Add per-variant configuration infrastructure and VIM4 support

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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 <neil.armstrong@linaro.org>
Signed-off-by: Ronald Claveau <linux-kernel-dev@aliel.fr>
Link: https://patch.msgid.link/20260917-add-mcu-fan-khadas-vim4-v12-1-497cd543a148@aliel.fr
Signed-off-by: Lee Jones <lee@kernel.org>
This commit is contained in:
Ronald Claveau 2026-09-17 09:59:00 +02:00 committed by Lee Jones
parent cee9395acd
commit 6277c3cd74
1 changed files with 18 additions and 1 deletions
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19
include/linux/mfd/khadas-mcu.h
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@ -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 */