Merge tag 'soc2-for-3.16' of git://git.kernel.org/pub/scm/linux/kerne…

…l/git/arm/arm-soc

Pull part two of ARM SoC updates from Arnd Bergmann:
 "This is a small follow-up to the larger ARM SoC updates merged last
  week, almost entirely for the keystone platform.

  The main change here is to use the new dma-ranges parsing code that
  came in through Russell's ARM tree.  This allows the keystone platform
  to do cache-coherent DMA and to finally support all the available
  physical memory when LPAE is enabled.

  Aside from this, the keystone reset driver has been rewritten, and
  there is a small bug fix to allow building the orion5x platform again"

* tag 'soc2-for-3.16' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
  ARM: keystone: Drop use of meminfo since its not available anymore
  ARM: orion5x: fix mvebu_mbus_dt_init call
  ARM: configs: keystone: enable reset driver support
  ARM: dts: keystone: update reset node to work with reset driver
  ARM: keystone: remove redundant reset stuff
  ARM: keystone: Update the dma offset for non-dt platform devices
  ARM: keystone: Switch over to coherent memory address space
  ARM: configs: keystone: add MTD_SPI_NOR (new dependency for M25P80)
  ARM: configs: keystone: drop CONFIG_COMMON_CLK_DEBUG

arch/arm/boot/dts/keystone.dtsi

@@ -66,9 +66,21 @@
 		ranges = <0x0 0x0 0x0 0xc0000000>;
 		dma-ranges = <0x80000000 0x8 0x00000000 0x80000000>;
 
+		pllctrl: pll-controller@02310000 {
+			compatible = "ti,keystone-pllctrl", "syscon";
+			reg = <0x02310000 0x200>;
+		};
+
+		devctrl: device-state-control@02620000 {
+			compatible = "ti,keystone-devctrl", "syscon";
+			reg = <0x02620000 0x1000>;
+		};
+
 		rstctrl: reset-controller {
 			compatible = "ti,keystone-reset";
-			reg = <0x023100e8 4>;	/* pll reset control reg */
+			ti,syscon-pll = <&pllctrl 0xe4>;
+			ti,syscon-dev = <&devctrl 0x328>;
+			ti,wdt-list = <0>;
 		};
 
 		/include/ "keystone-clocks.dtsi"

arch/arm/configs/integrator_defconfig

@@ -73,7 +73,6 @@ CONFIG_LEDS_TRIGGER_HEARTBEAT=y
 CONFIG_LEDS_TRIGGER_CPU=y
 CONFIG_RTC_CLASS=y
 CONFIG_RTC_DRV_PL030=y
-CONFIG_COMMON_CLK_DEBUG=y
 CONFIG_EXT2_FS=y
 CONFIG_VFAT_FS=y
 CONFIG_TMPFS=y

arch/arm/configs/keystone_defconfig

@@ -112,6 +112,7 @@ CONFIG_MTD_PLATRAM=y
 CONFIG_MTD_M25P80=y
 CONFIG_MTD_NAND=y
 CONFIG_MTD_NAND_DAVINCI=y
+CONFIG_MTD_SPI_NOR=y
 CONFIG_MTD_UBI=y
 CONFIG_PROC_DEVICETREE=y
 CONFIG_BLK_DEV_LOOP=y
@@ -131,6 +132,9 @@ CONFIG_SPI=y
 CONFIG_SPI_DAVINCI=y
 CONFIG_SPI_SPIDEV=y
 # CONFIG_HWMON is not set
+CONFIG_POWER_SUPPLY=y
+CONFIG_POWER_RESET=y
+CONFIG_POWER_RESET_KEYSTONE=y
 CONFIG_WATCHDOG=y
 CONFIG_WATCHDOG_CORE=y
 CONFIG_DAVINCI_WATCHDOG=y
@@ -145,7 +149,6 @@ CONFIG_USB_DWC3_VERBOSE=y
 CONFIG_KEYSTONE_USB_PHY=y
 CONFIG_DMADEVICES=y
 CONFIG_TI_EDMA=y
-CONFIG_COMMON_CLK_DEBUG=y
 CONFIG_MEMORY=y
 CONFIG_TI_AEMIF=y
 CONFIG_EXT4_FS=y

arch/arm/configs/vt8500_v6_v7_defconfig

@@ -73,7 +73,6 @@ CONFIG_LEDS_TRIGGERS=y
 CONFIG_RTC_CLASS=y
 CONFIG_RTC_DRV_VT8500=y
 CONFIG_DMADEVICES=y
-CONFIG_COMMON_CLK_DEBUG=y
 # CONFIG_IOMMU_SUPPORT is not set
 CONFIG_PWM=y
 CONFIG_PWM_VT8500=y

arch/arm/mach-keystone/keystone.c

@@ -14,66 +14,106 @@
 #include <linux/init.h>
 #include <linux/of_platform.h>
 #include <linux/of_address.h>
+#include <linux/memblock.h>
 
 #include <asm/setup.h>
 #include <asm/mach/map.h>
 #include <asm/mach/arch.h>
 #include <asm/mach/time.h>
 #include <asm/smp_plat.h>
+#include <asm/memory.h>
 
-#include "keystone.h"
+#include "memory.h"
 
-#define PLL_RESET_WRITE_KEY_MASK		0xffff0000
-#define PLL_RESET_WRITE_KEY			0x5a69
-#define PLL_RESET				BIT(16)
+#include "keystone.h"
 
-static void __iomem *keystone_rstctrl;
+static struct notifier_block platform_nb;
+static unsigned long keystone_dma_pfn_offset __read_mostly;
 
-static void __init keystone_init(void)
+static int keystone_platform_notifier(struct notifier_block *nb,
+				      unsigned long event, void *data)
 {
-	struct device_node *node;
+	struct device *dev = data;
 
-	node = of_find_compatible_node(NULL, NULL, "ti,keystone-reset");
-	if (WARN_ON(!node))
-		pr_warn("ti,keystone-reset node undefined\n");
+	if (event != BUS_NOTIFY_ADD_DEVICE)
+		return NOTIFY_DONE;
 
-	keystone_rstctrl = of_iomap(node, 0);
-	if (WARN_ON(!keystone_rstctrl))
-		pr_warn("ti,keystone-reset iomap error\n");
+	if (!dev)
+		return NOTIFY_BAD;
 
+	if (!dev->of_node) {
+		dev->dma_pfn_offset = keystone_dma_pfn_offset;
+		dev_err(dev, "set dma_pfn_offset%08lx\n",
+			dev->dma_pfn_offset);
+	}
+	return NOTIFY_OK;
+}
+
+static void __init keystone_init(void)
+{
 	keystone_pm_runtime_init();
+	if (platform_nb.notifier_call)
+		bus_register_notifier(&platform_bus_type, &platform_nb);
 	of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL);
 }
 
-static const char *keystone_match[] __initconst = {
-	"ti,keystone",
-	NULL,
-};
+static phys_addr_t keystone_virt_to_idmap(unsigned long x)
+{
+	return (phys_addr_t)(x) - CONFIG_PAGE_OFFSET + KEYSTONE_LOW_PHYS_START;
+}
 
-void keystone_restart(enum reboot_mode mode, const char *cmd)
+static void __init keystone_init_meminfo(void)
 {
-	u32 val;
+	bool lpae = IS_ENABLED(CONFIG_ARM_LPAE);
+	bool pvpatch = IS_ENABLED(CONFIG_ARM_PATCH_PHYS_VIRT);
+	phys_addr_t offset = PHYS_OFFSET - KEYSTONE_LOW_PHYS_START;
+	phys_addr_t mem_start, mem_end;
+
+	mem_start = memblock_start_of_DRAM();
+	mem_end = memblock_end_of_DRAM();
+
+	/* nothing to do if we are running out of the <32-bit space */
+	if (mem_start >= KEYSTONE_LOW_PHYS_START &&
+	    mem_end   <= KEYSTONE_LOW_PHYS_END)
+		return;
+
+	if (!lpae || !pvpatch) {
+		pr_crit("Enable %s%s%s to run outside 32-bit space\n",
+		      !lpae ? __stringify(CONFIG_ARM_LPAE) : "",
+		      (!lpae && !pvpatch) ? " and " : "",
+		      !pvpatch ? __stringify(CONFIG_ARM_PATCH_PHYS_VIRT) : "");
+	}
+
+	if (mem_start < KEYSTONE_HIGH_PHYS_START ||
+	    mem_end   > KEYSTONE_HIGH_PHYS_END) {
+		pr_crit("Invalid address space for memory (%08llx-%08llx)\n",
+		      (u64)mem_start, (u64)mem_end);
+	}
 
-	BUG_ON(!keystone_rstctrl);
+	offset += KEYSTONE_HIGH_PHYS_START;
+	__pv_phys_pfn_offset = PFN_DOWN(offset);
+	__pv_offset = (offset - PAGE_OFFSET);
 
-	/* Enable write access to RSTCTRL */
-	val = readl(keystone_rstctrl);
-	val &= PLL_RESET_WRITE_KEY_MASK;
-	val |= PLL_RESET_WRITE_KEY;
-	writel(val, keystone_rstctrl);
+	/* Populate the arch idmap hook */
+	arch_virt_to_idmap = keystone_virt_to_idmap;
+	platform_nb.notifier_call = keystone_platform_notifier;
+	keystone_dma_pfn_offset = PFN_DOWN(KEYSTONE_HIGH_PHYS_START -
+						KEYSTONE_LOW_PHYS_START);
 
-	/* Reset the SOC */
-	val = readl(keystone_rstctrl);
-	val &= ~PLL_RESET;
-	writel(val, keystone_rstctrl);
+	pr_info("Switching to high address space at 0x%llx\n", (u64)offset);
 }
 
+static const char *keystone_match[] __initconst = {
+	"ti,keystone",
+	NULL,
+};
+
 DT_MACHINE_START(KEYSTONE, "Keystone")
 #if defined(CONFIG_ZONE_DMA) && defined(CONFIG_ARM_LPAE)
 	.dma_zone_size	= SZ_2G,
 #endif
 	.smp		= smp_ops(keystone_smp_ops),
 	.init_machine	= keystone_init,
 	.dt_compat	= keystone_match,
-	.restart	= keystone_restart,
+	.init_meminfo   = keystone_init_meminfo,
 MACHINE_END

arch/arm/mach-keystone/memory.h

@@ -0,0 +1,24 @@
+/*
+ * Copyright 2014 Texas Instruments, Inc.
+ *	Santosh Shilimkar <santosh.shilimkar@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ */
+#ifndef __MEMORY_H
+#define __MEMORY_H
+
+#define MAX_PHYSMEM_BITS	36
+#define SECTION_SIZE_BITS	34
+
+#define KEYSTONE_LOW_PHYS_START		0x80000000ULL
+#define KEYSTONE_LOW_PHYS_SIZE		0x80000000ULL /* 2G */
+#define KEYSTONE_LOW_PHYS_END		(KEYSTONE_LOW_PHYS_START + \
+					 KEYSTONE_LOW_PHYS_SIZE - 1)
+
+#define KEYSTONE_HIGH_PHYS_START	0x800000000ULL
+#define KEYSTONE_HIGH_PHYS_SIZE		0x400000000ULL	/* 16G */
+#define KEYSTONE_HIGH_PHYS_END		(KEYSTONE_HIGH_PHYS_START + \
+					 KEYSTONE_HIGH_PHYS_SIZE - 1)
+#endif /* __MEMORY_H */

arch/arm/mach-keystone/platsmp.c

@@ -17,13 +17,16 @@
 #include <linux/io.h>
 
 #include <asm/smp_plat.h>
+#include <asm/prom.h>
+#include <asm/tlbflush.h>
+#include <asm/pgtable.h>
 
 #include "keystone.h"
 
 static int keystone_smp_boot_secondary(unsigned int cpu,
 						struct task_struct *idle)
 {
-	unsigned long start = virt_to_phys(&secondary_startup);
+	unsigned long start = virt_to_idmap(&secondary_startup);
 	int error;
 
 	pr_debug("keystone-smp: booting cpu %d, vector %08lx\n",
@@ -36,6 +39,19 @@ static int keystone_smp_boot_secondary(unsigned int cpu,
 	return error;
 }
 
+#ifdef CONFIG_ARM_LPAE
+static void __cpuinit keystone_smp_secondary_initmem(unsigned int cpu)
+{
+	pgd_t *pgd0 = pgd_offset_k(0);
+	cpu_set_ttbr(1, __pa(pgd0) + TTBR1_OFFSET);
+	local_flush_tlb_all();
+}
+#else
+static inline void __cpuinit keystone_smp_secondary_initmem(unsigned int cpu)
+{}
+#endif
+
 struct smp_operations keystone_smp_ops __initdata = {
 	.smp_boot_secondary	= keystone_smp_boot_secondary,
+	.smp_secondary_init     = keystone_smp_secondary_initmem,
 };

arch/arm/mach-orion5x/board-dt.c

@@ -45,7 +45,7 @@ static void __init orion5x_dt_init(void)
 	orion5x_id(&dev, &rev, &dev_name);
 	printk(KERN_INFO "Orion ID: %s. TCLK=%d.\n", dev_name, orion5x_tclk);
 
-	BUG_ON(mvebu_mbus_dt_init());
+	BUG_ON(mvebu_mbus_dt_init(false));
 
 	/*
 	 * Setup Orion address map