diff options
Diffstat (limited to 'arch/arm/mach-keystone')
| -rw-r--r-- | arch/arm/mach-keystone/Kconfig | 16 | ||||
| -rw-r--r-- | arch/arm/mach-keystone/Makefile | 2 | ||||
| -rw-r--r-- | arch/arm/mach-keystone/keystone.c | 148 |
3 files changed, 166 insertions, 0 deletions
diff --git a/arch/arm/mach-keystone/Kconfig b/arch/arm/mach-keystone/Kconfig new file mode 100644 index 0000000000..de69cc2dd4 --- /dev/null +++ b/arch/arm/mach-keystone/Kconfig @@ -0,0 +1,16 @@ +# SPDX-License-Identifier: GPL-2.0-only +config ARCH_KEYSTONE + bool "Texas Instruments Keystone Devices" + depends on ARCH_MULTI_V7 + select ARM_GIC + select HAVE_ARM_ARCH_TIMER + select KEYSTONE_TIMER + select ARCH_HAS_RESET_CONTROLLER + select ARM_ERRATA_798181 if SMP + select COMMON_CLK_KEYSTONE + select ZONE_DMA if ARM_LPAE + select PINCTRL + select PM_GENERIC_DOMAINS if PM + help + Support for boards based on the Texas Instruments Keystone family of + SoCs. diff --git a/arch/arm/mach-keystone/Makefile b/arch/arm/mach-keystone/Makefile new file mode 100644 index 0000000000..66598d29dd --- /dev/null +++ b/arch/arm/mach-keystone/Makefile @@ -0,0 +1,2 @@ +# SPDX-License-Identifier: GPL-2.0 +obj-y := keystone.o 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 |