[PATCH v2] mfd: ab8500: clean up definitions in header after debugfs removal

[Lukas Bulwahn]

Commit 3d4d1266597c ("mfd: ab8500: Drop debugfs module") removes the config
AB8500_DEBUG in drivers/mfd/Kconfig, but missed a reference to this config
in include/linux/mfd/abx500/ab8500.h.

The functions ab8500_dump_all_banks() and ab8500_debug_register_interrupt()
in the ab8500 header, previously with definitions conditioned on
AB8500_DEBUG, are now completely needless to define and handle at all.

The function ab8500_debug_register_interrupt() is not used at all and can
just be removed.

The function ab8500_dump_all_banks() is just registered in the abx500_ops
struct in the dump_all_banks field, but this is then not further referenced
anywhere else at all. So, safely drop the dump_all_banks field from
abx500_ops and delete the ab8500_dump_all_banks() definition.

Signed-off-by: Lukas Bulwahn <lukas.bulwahn@xxxxxxxxx>
Reviewed-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
---
Lee, please pick this minor clean-up patch.

v1:
  https://lore.kernel.org/all/20220311145209.17346-1-lukas.bulwahn@xxxxxxxxx/

v1 -> v2:
  - leave "," in as requested in https://lore.kernel.org/all/Yi8BtWlhWjiUOADk@xxxxxxxxxx/
  - add Reviewed-by tag from Linus W. from 
    https://lore.kernel.org/all/CACRpkdbjy2Cpzs7j6=iWw+wnJxBHkaxgcO2SOx6DeTLeF4ogPw@xxxxxxxxxxxxxx/ 

 drivers/mfd/ab8500-core.c         | 1 -
 include/linux/mfd/abx500.h        | 1 -
 include/linux/mfd/abx500/ab8500.h | 9 ---------
 3 files changed, 11 deletions(-)

diff --git a/drivers/mfd/ab8500-core.c b/drivers/mfd/ab8500-core.c
index 9d9e9787d5e8..eb11caadb801 100644
--- a/drivers/mfd/ab8500-core.c
+++ b/drivers/mfd/ab8500-core.c
@@ -329,7 +329,6 @@ static struct abx500_ops ab8500_ops = {
 	.mask_and_set_register = ab8500_mask_and_set_register,
 	.event_registers_startup_state_get = NULL,
 	.startup_irq_enabled = NULL,
-	.dump_all_banks = ab8500_dump_all_banks,
 };
 
 static void ab8500_irq_lock(struct irq_data *data)
diff --git a/include/linux/mfd/abx500.h b/include/linux/mfd/abx500.h
index 7f07cfe44753..507e3d2f062f 100644
--- a/include/linux/mfd/abx500.h
+++ b/include/linux/mfd/abx500.h
@@ -63,7 +63,6 @@ struct abx500_ops {
 	int (*mask_and_set_register) (struct device *, u8, u8, u8, u8);
 	int (*event_registers_startup_state_get) (struct device *, u8 *);
 	int (*startup_irq_enabled) (struct device *, unsigned int);
-	void (*dump_all_banks) (struct device *);
 };
 
 int abx500_register_ops(struct device *core_dev, struct abx500_ops *ops);
diff --git a/include/linux/mfd/abx500/ab8500.h b/include/linux/mfd/abx500/ab8500.h
index 302a330c5c84..42fd5da7d8a7 100644
--- a/include/linux/mfd/abx500/ab8500.h
+++ b/include/linux/mfd/abx500/ab8500.h
@@ -503,13 +503,4 @@ static inline int is_ab9540_2p0_or_earlier(struct ab8500 *ab)
 
 void ab8500_override_turn_on_stat(u8 mask, u8 set);
 
-#ifdef CONFIG_AB8500_DEBUG
-extern int prcmu_abb_read(u8 slave, u8 reg, u8 *value, u8 size);
-void ab8500_dump_all_banks(struct device *dev);
-void ab8500_debug_register_interrupt(int line);
-#else
-static inline void ab8500_dump_all_banks(struct device *dev) {}
-static inline void ab8500_debug_register_interrupt(int line) {}
-#endif
-
 #endif /* MFD_AB8500_H */
-- 
2.17.1