[PATCH 10/34] sparc32: drop tadpole specific code

[PATCH 10/34] sparc32: drop tadpole specific code

[Sam Ravnborg]

tadpole.c assigned cpu_pwr_save based on the current configuration.
The rest of the tadpole.c file was only used if cpu_pwr_save was
dereferenced.
But this variable was never dereferenced - and I went back to a 2.6.12
kernel to check (from June 2005) - and not even then was it used.

Drop this code as it has not been in use for ~10 years.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
---
 arch/sparc/kernel/Makefile  |   1 -
 arch/sparc/kernel/devices.c |   1 -
 arch/sparc/kernel/kernel.h  |   3 -
 arch/sparc/kernel/tadpole.c | 130 --------------------------------------------
 4 files changed, 135 deletions(-)
 delete mode 100644 arch/sparc/kernel/tadpole.c

diff --git a/arch/sparc/kernel/Makefile b/arch/sparc/kernel/Makefile
index d15cc17..7cf9c6e 100644
--- a/arch/sparc/kernel/Makefile
+++ b/arch/sparc/kernel/Makefile
@@ -42,7 +42,6 @@ obj-y                   += time_$(BITS).o
 obj-$(CONFIG_SPARC32)   += windows.o
 obj-y                   += cpu.o
 obj-$(CONFIG_SPARC32)   += devices.o
-obj-$(CONFIG_SPARC32)   += tadpole.o
 obj-y                   += ptrace_$(BITS).o
 obj-y                   += unaligned_$(BITS).o
 obj-y                   += una_asm_$(BITS).o
diff --git a/arch/sparc/kernel/devices.c b/arch/sparc/kernel/devices.c
index 6f39916..8d5d09f 100644
--- a/arch/sparc/kernel/devices.c
+++ b/arch/sparc/kernel/devices.c
@@ -134,5 +134,4 @@ void __init device_scan(void)
 
 	auxio_probe();
 	auxio_power_probe();
-	clock_stop_probe();
 }
diff --git a/arch/sparc/kernel/kernel.h b/arch/sparc/kernel/kernel.h
index 4a8d0db..beaba3a 100644
--- a/arch/sparc/kernel/kernel.h
+++ b/arch/sparc/kernel/kernel.h
@@ -133,9 +133,6 @@ asmlinkage void user_unaligned_trap(struct pt_regs *regs, unsigned int insn);
 /* windows.c */
 void try_to_clear_window_buffer(struct pt_regs *regs, int who);
 
-/* tadpole.c */
-void __init clock_stop_probe(void);
-
 /* auxio_32.c */
 void __init auxio_probe(void);
 void __init auxio_power_probe(void);
diff --git a/arch/sparc/kernel/tadpole.c b/arch/sparc/kernel/tadpole.c
deleted file mode 100644
index 4bbfe4e..0000000
--- a/arch/sparc/kernel/tadpole.c
+++ /dev/null
@@ -1,130 +0,0 @@
-/* tadpole.c: Probing for the tadpole clock stopping h/w at boot time.
- *
- * Copyright (C) 1996 David Redman (djhr@tadpole.co.uk)
- */
-
-#include <linux/string.h>
-#include <linux/kernel.h>
-#include <linux/sched.h>
-#include <linux/init.h>
-
-#include <asm/asi.h>
-#include <asm/oplib.h>
-#include <asm/io.h>
-
-#include "kernel.h"
-
-#define MACIO_SCSI_CSR_ADDR	0x78400000
-#define MACIO_EN_DMA		0x00000200
-#define CLOCK_INIT_DONE		1
-
-static int clk_state;
-static volatile unsigned char *clk_ctrl;
-
-/* TODO - cpu_pwr_save is only assigned - cleanup potential. */
-static void (*cpu_pwr_save)(void);
-
-static inline unsigned int ldphys(unsigned int addr)
-{
-	unsigned long data;
-    
-	__asm__ __volatile__("\n\tlda [%1] %2, %0\n\t" : 
-			     "=r" (data) :
-			     "r" (addr), "i" (ASI_M_BYPASS));
-	return data;
-}
-
-static void clk_init(void)
-{
-	__asm__ __volatile__("mov 0x6c, %%g1\n\t"
-			     "mov 0x4c, %%g2\n\t"
-			     "mov 0xdf, %%g3\n\t"
-			     "stb %%g1, [%0+3]\n\t"
-			     "stb %%g2, [%0+3]\n\t"
-			     "stb %%g3, [%0+3]\n\t" : :
-			     "r" (clk_ctrl) :
-			     "g1", "g2", "g3");
-}
-
-static void clk_slow(void)
-{
-	__asm__ __volatile__("mov 0xcc, %%g2\n\t"
-			     "mov 0x4c, %%g3\n\t"
-			     "mov 0xcf, %%g4\n\t"
-			     "mov 0xdf, %%g5\n\t"
-			     "stb %%g2, [%0+3]\n\t"
-			     "stb %%g3, [%0+3]\n\t"
-			     "stb %%g4, [%0+3]\n\t"
-			     "stb %%g5, [%0+3]\n\t" : :
-			     "r" (clk_ctrl) :
-			     "g2", "g3", "g4", "g5");
-}
-
-/*
- * Tadpole is guaranteed to be UP, using local_irq_save.
- */
-static void tsu_clockstop(void)
-{
-	unsigned int mcsr;
-	unsigned long flags;
-
-	if (!clk_ctrl)
-		return;
-	if (!(clk_state & CLOCK_INIT_DONE)) {
-		local_irq_save(flags);
-		clk_init();
-		clk_state |= CLOCK_INIT_DONE;       /* all done */
-		local_irq_restore(flags);
-		return;
-	}
-	if (!(clk_ctrl[2] & 1))
-		return;               /* no speed up yet */
-
-	local_irq_save(flags);
-
-	/* if SCSI DMA in progress, don't slow clock */
-	mcsr = ldphys(MACIO_SCSI_CSR_ADDR);
-	if ((mcsr&MACIO_EN_DMA) != 0) {
-		local_irq_restore(flags);
-		return;
-	}
-	/* TODO... the minimum clock setting ought to increase the
-	 * memory refresh interval..
-	 */
-	clk_slow();
-	local_irq_restore(flags);
-}
-
-static void swift_clockstop(void)
-{
-	if (!clk_ctrl)
-		return;
-	clk_ctrl[0] = 0;
-}
-
-void __init clock_stop_probe(void)
-{
-	phandle node, clk_nd;
-	char name[20];
-    
-	prom_getstring(prom_root_node, "name", name, sizeof(name));
-	if (strncmp(name, "Tadpole", 7))
-		return;
-	node = prom_getchild(prom_root_node);
-	node = prom_searchsiblings(node, "obio");
-	node = prom_getchild(node);
-	clk_nd = prom_searchsiblings(node, "clk-ctrl");
-	if (!clk_nd)
-		return;
-	printk("Clock Stopping h/w detected... ");
-	clk_ctrl = (char *) prom_getint(clk_nd, "address");
-	clk_state = 0;
-	if (name[10] = '\0') {
-		cpu_pwr_save = tsu_clockstop;
-		printk("enabled (S3)\n");
-	} else if ((name[10] = 'X') || (name[10] = 'G')) {
-		cpu_pwr_save = swift_clockstop;
-		printk("enabled (%s)\n",name+7);
-	} else
-		printk("disabled %s\n",name+7);
-}
-- 
1.9.0