powerpc/mpic: Remove duplicate MPIC_WANTS_RESET flag

There are two separate flags controlling whether or not the MPIC is
reset during initialization, which is completely unnecessary, and only
one of them can be specified in the device tree.

Also, most platforms in-tree right now do actually want to reset the
MPIC during initialization anyways, which means lots of duplicate code
passing the MPIC_WANTS_RESET flag.

Fix all of the callers which currently do not pass the MPIC_WANTS_RESET
flag to pass the MPIC_NO_RESET flag, then remove the MPIC_WANTS_RESET
flag and make the code reset the MPIC by default.

Signed-off-by: Kyle Moffett <Kyle.D.Moffett@boeing.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

arch/powerpc/include/asm/mpic.h

@@ -348,8 +348,6 @@ struct mpic
 #define MPIC_U3_HT_IRQS			0x00000004
 /* Broken IPI registers (autodetected) */
 #define MPIC_BROKEN_IPI			0x00000008
-/* MPIC wants a reset */
-#define MPIC_WANTS_RESET		0x00000010
 /* Spurious vector requires EOI */
 #define MPIC_SPV_EOI			0x00000020
 /* No passthrough disable */
@@ -366,9 +364,7 @@ struct mpic
 #define MPIC_SINGLE_DEST_CPU		0x00001000
 /* Enable CoreInt delivery of interrupts */
 #define MPIC_ENABLE_COREINT		0x00002000
-/* Disable resetting of the MPIC.
- * NOTE: This flag trumps MPIC_WANTS_RESET.
- */
+/* Do not reset the MPIC during initialization */
 #define MPIC_NO_RESET			0x00004000
 /* Freescale MPIC (compatible includes "fsl,mpic") */
 #define MPIC_FSL			0x00008000

arch/powerpc/platforms/44x/currituck.c

@@ -83,7 +83,7 @@ static void __init ppc47x_init_irq(void)
 		 * device-tree, just pass 0 to all arguments
 		 */
 		struct mpic *mpic =
-			mpic_alloc(np, 0, 0, 0, 0, " MPIC     ");
+			mpic_alloc(np, 0, MPIC_NO_RESET, 0, 0, " MPIC     ");
 		BUG_ON(mpic == NULL);
 		mpic_init(mpic);
 		ppc_md.get_irq = mpic_get_irq;

arch/powerpc/platforms/44x/iss4xx.c

@@ -71,8 +71,7 @@ static void __init iss4xx_init_irq(void)
 		/* The MPIC driver will get everything it needs from the
 		 * device-tree, just pass 0 to all arguments
 		 */
-		struct mpic *mpic = mpic_alloc(np, 0, 0, 0, 0,
-					       " MPIC     ");
+		struct mpic *mpic = mpic_alloc(np, 0, MPIC_NO_RESET, 0, 0, " MPIC     ");
 		BUG_ON(mpic == NULL);
 		mpic_init(mpic);
 		ppc_md.get_irq = mpic_get_irq;

arch/powerpc/platforms/85xx/corenet_ds.c

@@ -36,7 +36,8 @@
 void __init corenet_ds_pic_init(void)
 {
 	struct mpic *mpic;
-	unsigned int flags = MPIC_BIG_ENDIAN | MPIC_SINGLE_DEST_CPU;
+	unsigned int flags = MPIC_BIG_ENDIAN | MPIC_SINGLE_DEST_CPU |
+		MPIC_NO_RESET;
 
 	if (ppc_md.get_irq == mpic_get_coreint_irq)
 		flags |= MPIC_ENABLE_COREINT;

arch/powerpc/platforms/85xx/ksi8560.c

@@ -57,8 +57,7 @@ static void machine_restart(char *cmd)
 
 static void __init ksi8560_pic_init(void)
 {
-	struct mpic *mpic = mpic_alloc(NULL, 0,
-			MPIC_WANTS_RESET | MPIC_BIG_ENDIAN,
+	struct mpic *mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN,
 			0, 256, " OpenPIC  ");
 	BUG_ON(mpic == NULL);
 	mpic_init(mpic);

arch/powerpc/platforms/85xx/mpc8536_ds.c

@@ -36,9 +36,7 @@
 
 void __init mpc8536_ds_pic_init(void)
 {
-	struct mpic *mpic = mpic_alloc(NULL, 0,
-			  MPIC_WANTS_RESET |
-			  MPIC_BIG_ENDIAN,
+	struct mpic *mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN,
 			0, 256, " OpenPIC  ");
 	BUG_ON(mpic == NULL);
 	mpic_init(mpic);

arch/powerpc/platforms/85xx/mpc85xx_ads.c

@@ -50,8 +50,7 @@ static int mpc85xx_exclude_device(struct pci_controller *hose,
 
 static void __init mpc85xx_ads_pic_init(void)
 {
-	struct mpic *mpic = mpic_alloc(NULL, 0,
-			MPIC_WANTS_RESET | MPIC_BIG_ENDIAN,
+	struct mpic *mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN,
 			0, 256, " OpenPIC  ");
 	BUG_ON(mpic == NULL);
 	mpic_init(mpic);

arch/powerpc/platforms/85xx/mpc85xx_cds.c

@@ -188,8 +188,7 @@ static struct irqaction mpc85xxcds_8259_irqaction = {
 static void __init mpc85xx_cds_pic_init(void)
 {
 	struct mpic *mpic;
-	mpic = mpic_alloc(NULL, 0,
-			MPIC_WANTS_RESET | MPIC_BIG_ENDIAN,
+	mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN,
 			0, 256, " OpenPIC  ");
 	BUG_ON(mpic == NULL);
 	mpic_init(mpic);

arch/powerpc/platforms/85xx/mpc85xx_ds.c

@@ -72,12 +72,12 @@ void __init mpc85xx_ds_pic_init(void)
 
 	if (of_flat_dt_is_compatible(root, "fsl,MPC8572DS-CAMP")) {
 		mpic = mpic_alloc(NULL, 0,
+			MPIC_NO_RESET |
 			MPIC_BIG_ENDIAN |
 			MPIC_SINGLE_DEST_CPU,
 			0, 256, " OpenPIC  ");
 	} else {
 		mpic = mpic_alloc(NULL, 0,
-			  MPIC_WANTS_RESET |
 			  MPIC_BIG_ENDIAN |
 			  MPIC_SINGLE_DEST_CPU,
 			0, 256, " OpenPIC  ");

arch/powerpc/platforms/85xx/mpc85xx_mds.c

@@ -434,8 +434,7 @@ machine_arch_initcall(p1021_mds, swiotlb_setup_bus_notifier);
 
 static void __init mpc85xx_mds_pic_init(void)
 {
-	struct mpic *mpic = mpic_alloc(NULL, 0,
-			MPIC_WANTS_RESET | MPIC_BIG_ENDIAN |
+	struct mpic *mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN |
 			MPIC_SINGLE_DEST_CPU,
 			0, 256, " OpenPIC  ");
 	BUG_ON(mpic == NULL);

arch/powerpc/platforms/85xx/mpc85xx_rdb.c

@@ -48,13 +48,12 @@ void __init mpc85xx_rdb_pic_init(void)
 	unsigned long root = of_get_flat_dt_root();
 
 	if (of_flat_dt_is_compatible(root, "fsl,MPC85XXRDB-CAMP")) {
-		mpic = mpic_alloc(NULL, 0,
+		mpic = mpic_alloc(NULL, 0, MPIC_NO_RESET |
 			MPIC_BIG_ENDIAN |
 			MPIC_SINGLE_DEST_CPU,
 			0, 256, " OpenPIC  ");
 	} else {
 		mpic = mpic_alloc(NULL, 0,
-		  MPIC_WANTS_RESET |
 		  MPIC_BIG_ENDIAN |
 		  MPIC_SINGLE_DEST_CPU,
 		  0, 256, " OpenPIC  ");

arch/powerpc/platforms/85xx/p1010rdb.c

@@ -32,8 +32,7 @@
 
 void __init p1010_rdb_pic_init(void)
 {
-	struct mpic *mpic = mpic_alloc(NULL, 0,
-	  MPIC_WANTS_RESET | MPIC_BIG_ENDIAN |
+	struct mpic *mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN |
 	  MPIC_SINGLE_DEST_CPU,
 	  0, 256, " OpenPIC  ");
 

arch/powerpc/platforms/85xx/p1022_ds.c

@@ -242,9 +242,7 @@ p1022ds_valid_monitor_port(enum fsl_diu_monitor_port port)
 
 void __init p1022_ds_pic_init(void)
 {
-	struct mpic *mpic = mpic_alloc(NULL, 0,
-		MPIC_WANTS_RESET |
-		MPIC_BIG_ENDIAN |
+	struct mpic *mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN |
 		MPIC_SINGLE_DEST_CPU,
 		0, 256, " OpenPIC  ");
 	BUG_ON(mpic == NULL);

arch/powerpc/platforms/85xx/p1023_rds.c

@@ -93,8 +93,7 @@ machine_device_initcall(p1023_rds, mpc85xx_common_publish_devices);
 
 static void __init mpc85xx_rds_pic_init(void)
 {
-	struct mpic *mpic = mpic_alloc(NULL, 0,
-		MPIC_WANTS_RESET | MPIC_BIG_ENDIAN |
+	struct mpic *mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN |
 		MPIC_SINGLE_DEST_CPU,
 		0, 256, " OpenPIC  ");
 

arch/powerpc/platforms/85xx/sbc8548.c

@@ -54,8 +54,7 @@ static int sbc_rev;
 
 static void __init sbc8548_pic_init(void)
 {
-	struct mpic *mpic = mpic_alloc(NULL, 0,
-			MPIC_WANTS_RESET | MPIC_BIG_ENDIAN,
+	struct mpic *mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN,
 			0, 256, " OpenPIC  ");
 	BUG_ON(mpic == NULL);
 	mpic_init(mpic);

arch/powerpc/platforms/85xx/sbc8560.c

@@ -41,8 +41,7 @@
 
 static void __init sbc8560_pic_init(void)
 {
-	struct mpic *mpic = mpic_alloc(NULL, 0,
-			MPIC_WANTS_RESET | MPIC_BIG_ENDIAN,
+	struct mpic *mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN,
 			0, 256, " OpenPIC  ");
 	BUG_ON(mpic == NULL);
 	mpic_init(mpic);

arch/powerpc/platforms/85xx/socrates.c

@@ -48,8 +48,7 @@ static void __init socrates_pic_init(void)
 {
 	struct device_node *np;
 
-	struct mpic *mpic = mpic_alloc(NULL, 0,
-			MPIC_WANTS_RESET | MPIC_BIG_ENDIAN,
+	struct mpic *mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN,
 			0, 256, " OpenPIC  ");
 	BUG_ON(mpic == NULL);
 	mpic_init(mpic);

arch/powerpc/platforms/85xx/stx_gp3.c

@@ -48,8 +48,7 @@
 
 static void __init stx_gp3_pic_init(void)
 {
-	struct mpic *mpic = mpic_alloc(NULL, 0,
-			MPIC_WANTS_RESET | MPIC_BIG_ENDIAN,
+	struct mpic *mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN,
 			0, 256, " OpenPIC  ");
 	BUG_ON(mpic == NULL);
 	mpic_init(mpic);

arch/powerpc/platforms/85xx/tqm85xx.c

@@ -47,7 +47,7 @@
 static void __init tqm85xx_pic_init(void)
 {
 	struct mpic *mpic = mpic_alloc(NULL, 0,
-			MPIC_WANTS_RESET | MPIC_BIG_ENDIAN,
+			MPIC_BIG_ENDIAN,
 			0, 256, " OpenPIC  ");
 	BUG_ON(mpic == NULL);
 	mpic_init(mpic);

arch/powerpc/platforms/85xx/xes_mpc85xx.c

@@ -43,9 +43,7 @@
 
 void __init xes_mpc85xx_pic_init(void)
 {
-	struct mpic *mpic = mpic_alloc(NULL, 0,
-			  MPIC_WANTS_RESET |
-			  MPIC_BIG_ENDIAN,
+	struct mpic *mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN,
 			0, 256, " OpenPIC  ");
 	BUG_ON(mpic == NULL);
 	mpic_init(mpic);

arch/powerpc/platforms/86xx/pic.c

@@ -37,8 +37,7 @@ void __init mpc86xx_init_irq(void)
 	int cascade_irq;
 #endif
 
-	struct mpic *mpic = mpic_alloc(NULL, 0,
-			MPIC_WANTS_RESET | MPIC_BIG_ENDIAN |
+	struct mpic *mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN |
 			MPIC_SINGLE_DEST_CPU,
 			0, 256, " MPIC     ");
 	BUG_ON(mpic == NULL);

arch/powerpc/platforms/cell/setup.c

@@ -197,7 +197,8 @@ static void __init mpic_init_IRQ(void)
 		/* The MPIC driver will get everything it needs from the
 		 * device-tree, just pass 0 to all arguments
 		 */
-		mpic = mpic_alloc(dn, 0, MPIC_SECONDARY, 0, 0, " MPIC     ");
+		mpic = mpic_alloc(dn, 0, MPIC_SECONDARY | MPIC_NO_RESET,
+				0, 0, " MPIC     ");
 		if (mpic == NULL)
 			continue;
 		mpic_init(mpic);

arch/powerpc/platforms/chrp/setup.c

@@ -435,7 +435,8 @@ static void __init chrp_find_openpic(void)
 	if (len > 1)
 		isu_size = iranges[3];
 
-	chrp_mpic = mpic_alloc(np, opaddr, 0, isu_size, 0, " MPIC    ");
+	chrp_mpic = mpic_alloc(np, opaddr, MPIC_NO_RESET,
+			isu_size, 0, " MPIC    ");
 	if (chrp_mpic == NULL) {
 		printk(KERN_ERR "Failed to allocate MPIC structure\n");
 		goto bail;

arch/powerpc/platforms/embedded6xx/holly.c

@@ -154,8 +154,7 @@ static void __init holly_init_IRQ(void)
 	struct device_node *cascade_node = NULL;
 #endif
 
-	mpic = mpic_alloc(NULL, 0,
-			MPIC_BIG_ENDIAN | MPIC_WANTS_RESET |
+	mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN |
 			MPIC_SPV_EOI | MPIC_NO_PTHROU_DIS | MPIC_REGSET_TSI108,
 			24, 0,
 			"Tsi108_PIC");

arch/powerpc/platforms/embedded6xx/linkstation.c

@@ -82,8 +82,7 @@ static void __init linkstation_init_IRQ(void)
 {
 	struct mpic *mpic;
 
-	mpic = mpic_alloc(NULL, 0, MPIC_WANTS_RESET,
-			4, 0, " EPIC     ");
+	mpic = mpic_alloc(NULL, 0, 0, 4, 0, " EPIC     ");
 	BUG_ON(mpic == NULL);
 
 	/* PCI IRQs */

arch/powerpc/platforms/embedded6xx/mpc7448_hpc2.c

@@ -108,8 +108,7 @@ static void __init mpc7448_hpc2_init_IRQ(void)
 	struct device_node *cascade_node = NULL;
 #endif
 
-	mpic = mpic_alloc(NULL, 0,
-			MPIC_BIG_ENDIAN | MPIC_WANTS_RESET |
+	mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN |
 			MPIC_SPV_EOI | MPIC_NO_PTHROU_DIS | MPIC_REGSET_TSI108,
 			24, 0,
 			"Tsi108_PIC");

arch/powerpc/platforms/embedded6xx/storcenter.c

@@ -84,8 +84,7 @@ static void __init storcenter_init_IRQ(void)
 {
 	struct mpic *mpic;
 
-	mpic = mpic_alloc(NULL, 0, MPIC_WANTS_RESET,
-			16, 0, " OpenPIC  ");
+	mpic = mpic_alloc(NULL, 0, 0, 16, 0, " OpenPIC  ");
 	BUG_ON(mpic == NULL);
 
 	/*

arch/powerpc/platforms/maple/setup.c

@@ -262,7 +262,7 @@ static void __init maple_init_IRQ(void)
 		flags |= MPIC_BIG_ENDIAN;
 
 	/* XXX Maple specific bits */
-	flags |= MPIC_U3_HT_IRQS | MPIC_WANTS_RESET;
+	flags |= MPIC_U3_HT_IRQS;
 	/* All U3/U4 are big-endian, older SLOF firmware doesn't encode this */
 	flags |= MPIC_BIG_ENDIAN;
 

arch/powerpc/platforms/pasemi/setup.c

@@ -224,7 +224,7 @@ static __init void pas_init_IRQ(void)
 	openpic_addr = of_read_number(opprop, naddr);
 	printk(KERN_DEBUG "OpenPIC addr: %lx\n", openpic_addr);
 
-	mpic_flags = MPIC_LARGE_VECTORS | MPIC_NO_BIAS;
+	mpic_flags = MPIC_LARGE_VECTORS | MPIC_NO_BIAS | MPIC_NO_RESET;
 
 	nmiprop = of_get_property(mpic_node, "nmi-source", NULL);
 	if (nmiprop)

arch/powerpc/platforms/powermac/pic.c

@@ -469,7 +469,6 @@ static struct mpic * __init pmac_setup_one_mpic(struct device_node *np,
 
 	pmac_call_feature(PMAC_FTR_ENABLE_MPIC, np, 0, 0);
 
-	flags |= MPIC_WANTS_RESET;
 	if (of_get_property(np, "big-endian", NULL))
 		flags |= MPIC_BIG_ENDIAN;
 

arch/powerpc/platforms/pseries/setup.c

@@ -190,7 +190,8 @@ static void __init pseries_mpic_init_IRQ(void)
 	BUG_ON(openpic_addr == 0);
 
 	/* Setup the openpic driver */
-	mpic = mpic_alloc(pSeries_mpic_node, openpic_addr, 0, 16, 0, " MPIC     ");
+	mpic = mpic_alloc(pSeries_mpic_node, openpic_addr,
+			MPIC_NO_RESET, 16, 0, " MPIC     ");
 	BUG_ON(mpic == NULL);
 
 	/* Add ISUs */

arch/powerpc/sysdev/mpic.c

@@ -1286,7 +1286,7 @@ struct mpic * __init mpic_alloc(struct device_node *node,
 	/* When using a device-node, reset requests are only honored if the MPIC
 	 * is allowed to reset.
 	 */
-	if ((mpic->flags & MPIC_WANTS_RESET) && !(mpic->flags & MPIC_NO_RESET)) {
+	if (!(mpic->flags & MPIC_NO_RESET)) {
 		printk(KERN_DEBUG "mpic: Resetting\n");
 		mpic_write(mpic->gregs, MPIC_INFO(GREG_GLOBAL_CONF_0),
 			   mpic_read(mpic->gregs, MPIC_INFO(GREG_GLOBAL_CONF_0))