[PATCH v9 1/6] mfd: khadas-mcu: Add per-variant configuration infrastructure and VIM4 support

From: Ronald Claveau <[email protected]>

Some values change per variant, add the structure to manage it.

Add an enum khadas_mcu_type used as value to match.

Also introduce khadas_mcu_fan_pdata to pass fan register address, a
table named levels to get fan-supported levels on the MCU, and the number
of levels to the fan sub-driver, removing the hardcoded constants.

Reviewed-by: Neil Armstrong <[email protected]>
Signed-off-by: Ronald Claveau <[email protected]>
---
 include/linux/mfd/khadas-mcu.h | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/include/linux/mfd/khadas-mcu.h b/include/linux/mfd/khadas-mcu.h
index a99ba2ed0e4e0..e4044c251b97e 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,
@@ -88,4 +95,21 @@ struct khadas_mcu {
 	struct regmap *regmap;
 };
 
+/**
+ * struct khadas_mcu_fan_pdata - fan sub-driver configuration
+ * @fan_reg: register address to write the fan level
+ * @levels: table mapping logical cooling-device states to raw fan levels
+ * @nlevels: number of entries in @levels
+ */
+struct khadas_mcu_fan_pdata {
+	unsigned int fan_reg;
+	const unsigned int *levels;
+	unsigned int nlevels;
+};
+
+enum khadas_mcu_type {
+	KHADAS_MCU_GENERIC, /* VIM1/2/3, Edge, Edge-V */
+	KHADAS_MCU_VIM4,
+};
+
 #endif /* MFD_KHADAS_MCU_H */

-- 
2.49.0