staging: gpib: mite: remove unused global functions

The mite.c file was originally copied from the COMEDI code, and now that
it is in the kernel tree, along with the comedi code, on some build
configurations there are errors due to duplicate symbols (specifically
mite_dma_disarm).

Remove all of the unused functions in the gpib mite.c and .h files as
they aren't needed and cause the compiler to be confused.

Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/r/202501081239.BAPhfAHJ-lkp@intel.com/
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Link: https://lore.kernel.org/r/2025010809-padding-survive-91b3@gregkh
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/gpib/tnt4882/mite.c

@@ -148,72 +148,3 @@ void mite_list_devices(void)
 	}
 	pr_info("\n");
 }
-
-int mite_bytes_transferred(struct mite_struct *mite, int chan)
-{
-	int dar, fcr;
-
-	dar = readl(mite->mite_io_addr + MITE_DAR + CHAN_OFFSET(chan));
-	fcr = readl(mite->mite_io_addr + MITE_FCR + CHAN_OFFSET(chan)) & 0x000000FF;
-	return dar - fcr;
-}
-
-int mite_dma_tcr(struct mite_struct *mite)
-{
-	int tcr;
-	int lkar;
-
-	lkar = readl(mite->mite_io_addr + CHAN_OFFSET(0) + MITE_LKAR);
-	tcr = readl(mite->mite_io_addr + CHAN_OFFSET(0) + MITE_TCR);
-	MDPRINTK("lkar=0x%08x tcr=%d\n", lkar, tcr);
-
-	return tcr;
-}
-
-void mite_dma_disarm(struct mite_struct *mite)
-{
-	int chor;
-
-	/* disarm */
-	chor = CHOR_ABORT;
-	writel(chor, mite->mite_io_addr + CHAN_OFFSET(0) + MITE_CHOR);
-}
-
-void mite_dump_regs(struct mite_struct *mite)
-{
-	void *addr = 0;
-	unsigned long temp = 0;
-
-	pr_info("mite address is  =0x%p\n", mite->mite_io_addr);
-
-	addr = mite->mite_io_addr + MITE_CHOR + CHAN_OFFSET(0);
-	pr_info("mite status[CHOR]at 0x%p =0x%08lx\n", addr, temp = readl(addr));
-	//mite_decode(mite_CHOR_strings,temp);
-	addr = mite->mite_io_addr + MITE_CHCR + CHAN_OFFSET(0);
-	pr_info("mite status[CHCR]at 0x%p =0x%08lx\n", addr, temp = readl(addr));
-	//mite_decode(mite_CHCR_strings,temp);
-	addr = mite->mite_io_addr + MITE_TCR + CHAN_OFFSET(0);
-	pr_info("mite status[TCR] at 0x%p =0x%08x\n", addr, readl(addr));
-	addr = mite->mite_io_addr + MITE_MCR + CHAN_OFFSET(0);
-	pr_info("mite status[MCR] at 0x%p =0x%08lx\n", addr, temp = readl(addr));
-	//mite_decode(mite_MCR_strings,temp);
-	addr = mite->mite_io_addr + MITE_MAR + CHAN_OFFSET(0);
-	pr_info("mite status[MAR] at 0x%p =0x%08x\n", addr, readl(addr));
-	addr = mite->mite_io_addr + MITE_DCR + CHAN_OFFSET(0);
-	pr_info("mite status[DCR] at 0x%p =0x%08lx\n", addr, temp = readl(addr));
-	//mite_decode(mite_CR_strings,temp);
-	addr = mite->mite_io_addr + MITE_DAR + CHAN_OFFSET(0);
-	pr_info("mite status[DAR] at 0x%p =0x%08x\n", addr, readl(addr));
-	addr = mite->mite_io_addr + MITE_LKCR + CHAN_OFFSET(0);
-	pr_info("mite status[LKCR]at 0x%p =0x%08lx\n", addr, temp = readl(addr));
-	//mite_decode(mite_CR_strings,temp);
-	addr = mite->mite_io_addr + MITE_LKAR + CHAN_OFFSET(0);
-	pr_info("mite status[LKAR]at 0x%p =0x%08x\n", addr, readl(addr));
-
-	addr = mite->mite_io_addr + MITE_CHSR + CHAN_OFFSET(0);
-	pr_info("mite status[CHSR]at 0x%p =0x%08lx\n", addr, temp = readl(addr));
-	//mite_decode(mite_CHSR_strings,temp);
-	addr = mite->mite_io_addr + MITE_FCR + CHAN_OFFSET(0);
-	pr_info("mite status[FCR] at 0x%p =0x%08x\n\n", addr, readl(addr));
-}
-

drivers/staging/gpib/tnt4882/mite.h

@@ -61,15 +61,6 @@ int mite_setup(struct mite_struct *mite);
 void mite_unsetup(struct mite_struct *mite);
 void mite_list_devices(void);
 
-int mite_dma_tcr(struct mite_struct *mite);
-
-void mite_dma_arm(struct mite_struct *mite);
-void mite_dma_disarm(struct mite_struct *mite);
-
-void mite_dump_regs(struct mite_struct *mite);
-void mite_setregs(struct mite_struct *mite, unsigned long ll_start, int chan, int dir);
-int mite_bytes_transferred(struct mite_struct *mite, int chan);
-
 #define CHAN_OFFSET(x)			(0x100 * (x))
 
 /* DMA base for chan 0 is 0x500, chan 1 is 0x600 */