diff options
Diffstat (limited to 'arch/arm/mach-exynos/mach-exynos5-dt.c')
| -rw-r--r-- | arch/arm/mach-exynos/mach-exynos5-dt.c | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/arch/arm/mach-exynos/mach-exynos5-dt.c b/arch/arm/mach-exynos/mach-exynos5-dt.c new file mode 100644 index 00000000..d88234e1 --- /dev/null +++ b/arch/arm/mach-exynos/mach-exynos5-dt.c @@ -0,0 +1,114 @@ +/* + * SAMSUNG EXYNOS5250 Flattened Device Tree enabled machine + * + * Copyright (c) 2012 Samsung Electronics Co., Ltd. + * http://www.samsung.com + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. +*/ + +#include <linux/of_platform.h> +#include <linux/of_fdt.h> +#include <linux/memblock.h> +#include <linux/io.h> +#include <linux/clocksource.h> +#include <linux/dma-mapping.h> + +#include <asm/mach/arch.h> +#include <mach/regs-pmu.h> + +#include <plat/cpu.h> +#include <plat/mfc.h> + +#include "common.h" + +static u64 dma_mask64 = DMA_BIT_MASK(64); + +static void __init exynos5_dt_map_io(void) +{ + exynos_init_io(NULL, 0); +} + +static int exynos5250_platform_notifier(struct notifier_block *nb, + unsigned long event, void *__dev) +{ + struct device *dev = __dev; + + if (event != BUS_NOTIFY_ADD_DEVICE) + return NOTIFY_DONE; + + dev->dma_mask = &dma_mask64; + dev->coherent_dma_mask = DMA_BIT_MASK(64); + + return NOTIFY_OK; +} + +static struct notifier_block exynos5250_platform_nb = { + .notifier_call = exynos5250_platform_notifier, +}; + +static void __init exynos5_dt_machine_init(void) +{ + struct device_node *i2c_np; + const char *i2c_compat = "samsung,s3c2440-i2c"; + unsigned int tmp; + + /* + * Exynos5's legacy i2c controller and new high speed i2c + * controller have muxed interrupt sources. By default the + * interrupts for 4-channel HS-I2C controller are enabled. + * If node for first four channels of legacy i2c controller + * are available then re-configure the interrupts via the + * system register. + */ + for_each_compatible_node(i2c_np, NULL, i2c_compat) { + if (of_device_is_available(i2c_np)) { + if (of_alias_get_id(i2c_np, "i2c") < 4) { + tmp = readl(EXYNOS5_SYS_I2C_CFG); + writel(tmp & ~(0x1 << of_alias_get_id(i2c_np, "i2c")), + EXYNOS5_SYS_I2C_CFG); + } + } + } + + if (config_enabled(CONFIG_ARM_LPAE) && + of_machine_is_compatible("samsung,exynos5250")) + bus_register_notifier(&platform_bus_type, + &exynos5250_platform_nb); + + of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL); +} + +static char const *exynos5_dt_compat[] __initdata = { + "samsung,exynos5250", + "samsung,exynos5440", + NULL +}; + +static void __init exynos5_reserve(void) +{ +#ifdef CONFIG_S5P_DEV_MFC + struct s5p_mfc_dt_meminfo mfc_mem; + + /* Reserve memory for MFC only if it's available */ + mfc_mem.compatible = "samsung,mfc-v6"; + if (of_scan_flat_dt(s5p_fdt_find_mfc_mem, &mfc_mem)) + s5p_mfc_reserve_mem(mfc_mem.roff, mfc_mem.rsize, mfc_mem.loff, + mfc_mem.lsize); +#endif +} + +DT_MACHINE_START(EXYNOS5_DT, "SAMSUNG EXYNOS5 (Flattened Device Tree)") + /* Maintainer: Kukjin Kim <kgene.kim@samsung.com> */ + .init_irq = exynos5_init_irq, + .smp = smp_ops(exynos_smp_ops), + .map_io = exynos5_dt_map_io, + .init_machine = exynos5_dt_machine_init, + .init_late = exynos_init_late, + .init_time = exynos_init_time, + .dt_compat = exynos5_dt_compat, + .restart = exynos5_restart, + .reserve = exynos5_reserve, +MACHINE_END |