powerpc: Drop MPC5200 LocalPlus bus FIFO driver

While mpc5200b.dtsi contains a device that this driver can bind to, the
only purpose of a bound device is to be used by the four exported functions
mpc52xx_lpbfifo_submit(), mpc52xx_lpbfifo_abort(), mpc52xx_lpbfifo_poll()
and mpc52xx_lpbfifo_start_xfer(). However there are no callers to this
function and so the driver is effectively superfluous and can be deleted.
Also drop some defines and a struct from <asm/mpc52xx.h> that are unused
now together with the declarations of the four mentioned functions.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230413061642.kqkor4wkt7lp2mhp@pengutronix.de

arch/powerpc/include/asm/mpc52xx.h

@@ -285,47 +285,6 @@ extern int mpc52xx_gpt_start_timer(struct mpc52xx_gpt_priv *gpt, u64 period,
 extern u64 mpc52xx_gpt_timer_period(struct mpc52xx_gpt_priv *gpt);
 extern int mpc52xx_gpt_stop_timer(struct mpc52xx_gpt_priv *gpt);
 
-/* mpc52xx_lpbfifo.c */
-#define MPC52XX_LPBFIFO_FLAG_READ		(0)
-#define MPC52XX_LPBFIFO_FLAG_WRITE		(1<<0)
-#define MPC52XX_LPBFIFO_FLAG_NO_INCREMENT	(1<<1)
-#define MPC52XX_LPBFIFO_FLAG_NO_DMA		(1<<2)
-#define MPC52XX_LPBFIFO_FLAG_POLL_DMA		(1<<3)
-
-struct mpc52xx_lpbfifo_request {
-	struct list_head list;
-
-	/* localplus bus address */
-	unsigned int cs;
-	size_t offset;
-
-	/* Memory address */
-	void *data;
-	phys_addr_t data_phys;
-
-	/* Details of transfer */
-	size_t size;
-	size_t pos;	/* current position of transfer */
-	int flags;
-	int defer_xfer_start;
-
-	/* What to do when finished */
-	void (*callback)(struct mpc52xx_lpbfifo_request *);
-
-	void *priv;		/* Driver private data */
-
-	/* statistics */
-	int irq_count;
-	int irq_ticks;
-	u8 last_byte;
-	int buffer_not_done_cnt;
-};
-
-extern int mpc52xx_lpbfifo_submit(struct mpc52xx_lpbfifo_request *req);
-extern void mpc52xx_lpbfifo_abort(struct mpc52xx_lpbfifo_request *req);
-extern void mpc52xx_lpbfifo_poll(void);
-extern int mpc52xx_lpbfifo_start_xfer(struct mpc52xx_lpbfifo_request *req);
-
 /* mpc52xx_pic.c */
 extern void mpc52xx_init_irq(void);
 extern unsigned int mpc52xx_get_irq(void);

arch/powerpc/platforms/52xx/Kconfig

@@ -54,8 +54,3 @@ config PPC_MPC5200_BUGFIX
 	  for MPC5200B based boards.
 
 	  It is safe to say 'Y' here
-
-config PPC_MPC5200_LPBFIFO
-	tristate "MPC5200 LocalPlus bus FIFO driver"
-	depends on PPC_MPC52xx && PPC_BESTCOMM
-	select PPC_BESTCOMM_GEN_BD

arch/powerpc/platforms/52xx/Makefile

@@ -14,5 +14,3 @@ obj-$(CONFIG_PM)		+= mpc52xx_sleep.o mpc52xx_pm.o
 ifdef CONFIG_PPC_LITE5200
 	obj-$(CONFIG_PM)	+= lite5200_sleep.o lite5200_pm.o
 endif
-
-obj-$(CONFIG_PPC_MPC5200_LPBFIFO)	+= mpc52xx_lpbfifo.o