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-rw-r--r--arch/arm/mach-keystone/keystone.c148
1 files changed, 148 insertions, 0 deletions
diff --git a/arch/arm/mach-keystone/keystone.c b/arch/arm/mach-keystone/keystone.c
new file mode 100644
index 0000000000..f63671a302
--- /dev/null
+++ b/arch/arm/mach-keystone/keystone.c
@@ -0,0 +1,148 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Keystone2 based boards and SOC related code.
+ *
+ * Copyright 2013 Texas Instruments, Inc.
+ * Cyril Chemparathy <cyril@ti.com>
+ * Santosh Shilimkar <santosh.shillimkar@ti.com>
+ */
+
+#include <linux/io.h>
+#include <linux/dma-map-ops.h>
+#include <linux/init.h>
+#include <linux/pm_runtime.h>
+#include <linux/pm_clock.h>
+#include <linux/memblock.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+
+#include <asm/setup.h>
+#include <asm/mach/map.h>
+#include <asm/mach/arch.h>
+#include <asm/mach/time.h>
+#include <asm/page.h>
+
+#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)
+
+static struct dev_pm_domain keystone_pm_domain = {
+ .ops = {
+ USE_PM_CLK_RUNTIME_OPS
+ USE_PLATFORM_PM_SLEEP_OPS
+ },
+};
+
+static struct pm_clk_notifier_block platform_domain_notifier = {
+ .pm_domain = &keystone_pm_domain,
+ .con_ids = { NULL },
+};
+
+static const struct of_device_id of_keystone_table[] = {
+ {.compatible = "ti,k2hk"},
+ {.compatible = "ti,k2e"},
+ {.compatible = "ti,k2l"},
+ { /* end of list */ },
+};
+
+static int __init keystone_pm_runtime_init(void)
+{
+ struct device_node *np;
+
+ np = of_find_matching_node(NULL, of_keystone_table);
+ if (!np)
+ return 0;
+
+ pm_clk_add_notifier(&platform_bus_type, &platform_domain_notifier);
+
+ return 0;
+}
+
+#ifdef CONFIG_ARM_LPAE
+static int keystone_platform_notifier(struct notifier_block *nb,
+ unsigned long event, void *data)
+{
+ struct device *dev = data;
+
+ if (event != BUS_NOTIFY_ADD_DEVICE)
+ return NOTIFY_DONE;
+
+ if (!dev)
+ return NOTIFY_BAD;
+
+ if (!dev->of_node) {
+ int ret = dma_direct_set_offset(dev, KEYSTONE_HIGH_PHYS_START,
+ KEYSTONE_LOW_PHYS_START,
+ KEYSTONE_HIGH_PHYS_SIZE);
+ dev_err(dev, "set dma_offset%08llx%s\n",
+ KEYSTONE_HIGH_PHYS_START - KEYSTONE_LOW_PHYS_START,
+ ret ? " failed" : "");
+ }
+ return NOTIFY_OK;
+}
+
+static struct notifier_block platform_nb = {
+ .notifier_call = keystone_platform_notifier,
+};
+#endif /* CONFIG_ARM_LPAE */
+
+static void __init keystone_init(void)
+{
+#ifdef CONFIG_ARM_LPAE
+ if (PHYS_OFFSET >= KEYSTONE_HIGH_PHYS_START)
+ bus_register_notifier(&platform_bus_type, &platform_nb);
+#endif
+ keystone_pm_runtime_init();
+}
+
+static long long __init keystone_pv_fixup(void)
+{
+ long long offset;
+ u64 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 0;
+
+ if (mem_start < KEYSTONE_HIGH_PHYS_START ||
+ mem_end > KEYSTONE_HIGH_PHYS_END) {
+ pr_crit("Invalid address space for memory (%08llx-%08llx)\n",
+ mem_start, mem_end);
+ return 0;
+ }
+
+ offset = KEYSTONE_HIGH_PHYS_START - KEYSTONE_LOW_PHYS_START;
+
+ /* Populate the arch idmap hook */
+ arch_phys_to_idmap_offset = -offset;
+
+ return offset;
+}
+
+static const char *const keystone_match[] __initconst = {
+ "ti,k2hk",
+ "ti,k2e",
+ "ti,k2l",
+ "ti,k2g",
+ "ti,keystone",
+ NULL,
+};
+
+DT_MACHINE_START(KEYSTONE, "Keystone")
+#if defined(CONFIG_ZONE_DMA) && defined(CONFIG_ARM_LPAE)
+ .dma_zone_size = SZ_2G,
+#endif
+ .init_machine = keystone_init,
+ .dt_compat = keystone_match,
+ .pv_fixup = keystone_pv_fixup,
+MACHINE_END