Merge tag 'ux500-cleanup-v4.2' of git://git.kernel.org/pub/scm/linux/…

…kernel/git/linusw/linux-stericsson into next/cleanup

Merge "Ux500 cleanups for the v4.2 merge window" from Linus Walleij:

* tag 'ux500-cleanup-v4.2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-stericsson:
  ARM: ux500: delete static resource defines
  ARM: ux500: rename ux500_map_io
  ARM: ux500: look up PRCMU resource from DT
  ARM: ux500: kill off L2CC static map
  ARM: ux500: get rid of SCU and backupram static maps
  ARM: ux500: get rid of static GIC dist base
  ARM: ux500: get SCU base from device tree
  ARM: ux500: remap BB offset dynamically
  ARM: ux500: remove static maps from platsmp
  ARM: ux500: delete UART static map

arch/arm/mach-ux500/cache-l2x0.c

@@ -6,6 +6,7 @@
 
 #include <linux/io.h>
 #include <linux/of.h>
+#include <linux/of_address.h>
 
 #include <asm/hardware/cache-l2x0.h>
 
@@ -15,7 +16,14 @@
 static int __init ux500_l2x0_unlock(void)
 {
 	int i;
-	void __iomem *l2x0_base = __io_address(U8500_L2CC_BASE);
+	struct device_node *np;
+	void __iomem *l2x0_base;
+
+	np = of_find_compatible_node(NULL, NULL, "arm,pl310-cache");
+	l2x0_base = of_iomap(np, 0);
+	of_node_put(np);
+	if (!l2x0_base)
+		return -ENODEV;
 
 	/*
 	 * Unlock Data and Instruction Lock if locked. Ux500 U-Boot versions
@@ -30,6 +38,7 @@ static int __init ux500_l2x0_unlock(void)
 		writel_relaxed(0x0, l2x0_base + L2X0_LOCKDOWN_WAY_I_BASE +
 			       i * L2X0_LOCKDOWN_STRIDE);
 	}
+	iounmap(l2x0_base);
 	return 0;
 }
 

arch/arm/mach-ux500/cpu-db8500.c

@@ -43,49 +43,10 @@ static struct prcmu_pdata db8500_prcmu_pdata = {
 	.legacy_offset	= DB8500_PRCMU_LEGACY_OFFSET,
 };
 
-/* minimum static i/o mapping required to boot U8500 platforms */
-static struct map_desc u8500_uart_io_desc[] __initdata = {
-	__IO_DEV_DESC(U8500_UART0_BASE, SZ_4K),
-	__IO_DEV_DESC(U8500_UART2_BASE, SZ_4K),
-};
-
-/*  U8500 and U9540 common io_desc */
-static struct map_desc u8500_common_io_desc[] __initdata = {
-	/* SCU base also covers GIC CPU BASE and TWD with its 4K page */
-	__IO_DEV_DESC(U8500_SCU_BASE, SZ_4K),
-	__IO_DEV_DESC(U8500_GIC_DIST_BASE, SZ_4K),
-	__IO_DEV_DESC(U8500_L2CC_BASE, SZ_4K),
-	__IO_DEV_DESC(U8500_BACKUPRAM0_BASE, SZ_8K),
-};
-
-/* U8500 IO map specific description */
-static struct map_desc u8500_io_desc[] __initdata = {
-	__IO_DEV_DESC(U8500_PRCMU_BASE, SZ_4K),
-	__IO_DEV_DESC(U8500_PRCMU_TCDM_BASE, SZ_4K),
-
-};
-
-/* U9540 IO map specific description */
-static struct map_desc u9540_io_desc[] __initdata = {
-	__IO_DEV_DESC(U8500_PRCMU_BASE, SZ_4K + SZ_8K),
-	__IO_DEV_DESC(U8500_PRCMU_TCDM_BASE, SZ_4K + SZ_8K),
-};
-
 static void __init u8500_map_io(void)
 {
-	/*
-	 * Map the UARTs early so that the DEBUG_LL stuff continues to work.
-	 */
-	iotable_init(u8500_uart_io_desc, ARRAY_SIZE(u8500_uart_io_desc));
-
-	ux500_map_io();
-
-	iotable_init(u8500_common_io_desc, ARRAY_SIZE(u8500_common_io_desc));
-
-	if (cpu_is_ux540_family())
-		iotable_init(u9540_io_desc, ARRAY_SIZE(u9540_io_desc));
-	else
-		iotable_init(u8500_io_desc, ARRAY_SIZE(u8500_io_desc));
+	debug_ll_io_init();
+	ux500_setup_id();
 }
 
 /*
@@ -114,14 +75,18 @@ static struct arm_pmu_platdata db8500_pmu_platdata = {
 
 static const char *db8500_read_soc_id(void)
 {
-	void __iomem *uid = __io_address(U8500_BB_UID_BASE);
+	void __iomem *uid;
 
+	uid = ioremap(U8500_BB_UID_BASE, 0x20);
+	if (!uid)
+		return NULL;
 	/* Throw these device-specific numbers into the entropy pool */
 	add_device_randomness(uid, 0x14);
 	return kasprintf(GFP_KERNEL, "%08x%08x%08x%08x%08x",
 			 readl((u32 *)uid+0),
 			 readl((u32 *)uid+1), readl((u32 *)uid+2),
 			 readl((u32 *)uid+3), readl((u32 *)uid+4));
+	iounmap(uid);
 }
 
 static struct device * __init db8500_soc_device_init(void)

arch/arm/mach-ux500/cpu.c

@@ -16,6 +16,7 @@
 #include <linux/stat.h>
 #include <linux/of.h>
 #include <linux/of_irq.h>
+#include <linux/of_address.h>
 #include <linux/irq.h>
 #include <linux/irqchip.h>
 #include <linux/irqchip/arm-gic.h>
@@ -52,31 +53,36 @@ void ux500_restart(enum reboot_mode mode, const char *cmd)
 */
 void __init ux500_init_irq(void)
 {
+	struct device_node *np;
+	struct resource r;
+
 	gic_set_irqchip_flags(IRQCHIP_SKIP_SET_WAKE | IRQCHIP_MASK_ON_SUSPEND);
 	irqchip_init();
+	np = of_find_compatible_node(NULL, NULL, "stericsson,db8500-prcmu");
+	of_address_to_resource(np, 0, &r);
+	of_node_put(np);
+	if (!r.start) {
+		pr_err("could not find PRCMU base resource\n");
+		return;
+	}
+	prcmu_early_init(r.start, r.end-r.start);
+	ux500_pm_init(r.start, r.end-r.start);
 
 	/*
 	 * Init clocks here so that they are available for system timer
 	 * initialization.
 	 */
 	if (cpu_is_u8500_family()) {
-		prcmu_early_init(U8500_PRCMU_BASE, SZ_8K - 1);
-		ux500_pm_init(U8500_PRCMU_BASE, SZ_8K - 1);
-
 		u8500_of_clk_init(U8500_CLKRST1_BASE,
 				  U8500_CLKRST2_BASE,
 				  U8500_CLKRST3_BASE,
 				  U8500_CLKRST5_BASE,
 				  U8500_CLKRST6_BASE);
 	} else if (cpu_is_u9540()) {
-		prcmu_early_init(U8500_PRCMU_BASE, SZ_8K - 1);
-		ux500_pm_init(U8500_PRCMU_BASE, SZ_8K - 1);
 		u9540_clk_init(U8500_CLKRST1_BASE, U8500_CLKRST2_BASE,
 			       U8500_CLKRST3_BASE, U8500_CLKRST5_BASE,
 			       U8500_CLKRST6_BASE);
 	} else if (cpu_is_u8540()) {
-		prcmu_early_init(U8500_PRCMU_BASE, SZ_8K + SZ_4K - 1);
-		ux500_pm_init(U8500_PRCMU_BASE, SZ_8K + SZ_4K - 1);
 		u8540_clk_init(U8500_CLKRST1_BASE, U8500_CLKRST2_BASE,
 			       U8500_CLKRST3_BASE, U8500_CLKRST5_BASE,
 			       U8500_CLKRST6_BASE);

arch/arm/mach-ux500/id.c

@@ -72,7 +72,7 @@ static unsigned int partnumber(unsigned int asicid)
  * DB9540	0x413fc090	0xFFFFDBF4		0x009540xx
  */
 
-void __init ux500_map_io(void)
+void __init ux500_setup_id(void)
 {
 	unsigned int cpuid = read_cpuid_id();
 	unsigned int asicid = 0;

arch/arm/mach-ux500/platsmp.c

@@ -16,6 +16,8 @@
 #include <linux/device.h>
 #include <linux/smp.h>
 #include <linux/io.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
 
 #include <asm/cacheflush.h>
 #include <asm/smp_plat.h>
@@ -26,6 +28,9 @@
 #include "db8500-regs.h"
 #include "id.h"
 
+static void __iomem *scu_base;
+static void __iomem *backupram;
+
 /* This is called from headsmp.S to wakeup the secondary core */
 extern void u8500_secondary_startup(void);
 
@@ -41,16 +46,6 @@ static void write_pen_release(int val)
 	sync_cache_w(&pen_release);
 }
 
-static void __iomem *scu_base_addr(void)
-{
-	if (cpu_is_u8500_family() || cpu_is_ux540_family())
-		return __io_address(U8500_SCU_BASE);
-	else
-		ux500_unknown_soc();
-
-	return NULL;
-}
-
 static DEFINE_SPINLOCK(boot_lock);
 
 static void ux500_secondary_init(unsigned int cpu)
@@ -104,13 +99,6 @@ static int ux500_boot_secondary(unsigned int cpu, struct task_struct *idle)
 
 static void __init wakeup_secondary(void)
 {
-	void __iomem *backupram;
-
-	if (cpu_is_u8500_family() || cpu_is_ux540_family())
-		backupram = __io_address(U8500_BACKUPRAM0_BASE);
-	else
-		ux500_unknown_soc();
-
 	/*
 	 * write the address of secondary startup into the backup ram register
 	 * at offset 0x1FF4, then write the magic number 0xA1FEED01 to the
@@ -135,10 +123,16 @@ static void __init wakeup_secondary(void)
  */
 static void __init ux500_smp_init_cpus(void)
 {
-	void __iomem *scu_base = scu_base_addr();
 	unsigned int i, ncores;
+	struct device_node *np;
 
-	ncores = scu_base ? scu_get_core_count(scu_base) : 1;
+	np = of_find_compatible_node(NULL, NULL, "arm,cortex-a9-scu");
+	scu_base = of_iomap(np, 0);
+	of_node_put(np);
+	if (!scu_base)
+		return;
+	backupram = ioremap(U8500_BACKUPRAM0_BASE, SZ_8K);
+	ncores = scu_get_core_count(scu_base);
 
 	/* sanity check */
 	if (ncores > nr_cpu_ids) {
@@ -153,8 +147,7 @@ static void __init ux500_smp_init_cpus(void)
 
 static void __init ux500_smp_prepare_cpus(unsigned int max_cpus)
 {
-
-	scu_enable(scu_base_addr());
+	scu_enable(scu_base);
 	wakeup_secondary();
 }
 

arch/arm/mach-ux500/pm.c

@@ -15,6 +15,8 @@
 #include <linux/io.h>
 #include <linux/suspend.h>
 #include <linux/platform_data/arm-ux500-pm.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
 
 #include "db8500-regs.h"
 #include "pm_domains.h"
@@ -42,6 +44,7 @@
 #define PRCM_ARMITVAL127TO96	(prcmu_base + 0x26C)
 
 static void __iomem *prcmu_base;
+static void __iomem *dist_base;
 
 /* This function decouple the gic from the prcmu */
 int prcmu_gic_decouple(void)
@@ -88,7 +91,6 @@ bool prcmu_gic_pending_irq(void)
 {
 	u32 pr; /* Pending register */
 	u32 er; /* Enable register */
-	void __iomem *dist_base = __io_address(U8500_GIC_DIST_BASE);
 	int i;
 
 	/* 5 registers. STI & PPI not skipped */
@@ -143,7 +145,6 @@ bool prcmu_is_cpu_in_wfi(int cpu)
 int prcmu_copy_gic_settings(void)
 {
 	u32 er; /* Enable register */
-	void __iomem *dist_base = __io_address(U8500_GIC_DIST_BASE);
 	int i;
 
 	/* We skip the STI and PPI */
@@ -179,11 +180,21 @@ static const struct platform_suspend_ops ux500_suspend_ops = {
 
 void __init ux500_pm_init(u32 phy_base, u32 size)
 {
+	struct device_node *np;
+
 	prcmu_base = ioremap(phy_base, size);
 	if (!prcmu_base) {
 		pr_err("could not remap PRCMU for PM functions\n");
 		return;
 	}
+	np = of_find_compatible_node(NULL, NULL, "arm,cortex-a9-gic");
+	dist_base = of_iomap(np, 0);
+	of_node_put(np);
+	if (!dist_base) {
+		pr_err("could not remap GIC dist base for PM functions\n");
+		return;
+	}
+
 	/*
 	 * On watchdog reboot the GIC is in some cases decoupled.
 	 * This will make sure that the GIC is correctly configured.

arch/arm/mach-ux500/setup.h

@@ -18,28 +18,14 @@
 
 void ux500_restart(enum reboot_mode mode, const char *cmd);
 
-void __init ux500_map_io(void);
+void __init ux500_setup_id(void);
 
 extern void __init ux500_init_irq(void);
 
 extern struct device *ux500_soc_device_init(const char *soc_id);
 
 extern void ux500_timer_init(void);
 
-#define __IO_DEV_DESC(x, sz)	{		\
-	.virtual	= IO_ADDRESS(x),	\
-	.pfn		= __phys_to_pfn(x),	\
-	.length		= sz,			\
-	.type		= MT_DEVICE,		\
-}
-
-#define __MEM_DEV_DESC(x, sz)	{		\
-	.virtual	= IO_ADDRESS(x),	\
-	.pfn		= __phys_to_pfn(x),	\
-	.length		= sz,			\
-	.type		= MT_MEMORY_RWX,		\
-}
-
 extern struct smp_operations ux500_smp_ops;
 extern void ux500_cpu_die(unsigned int cpu);