From 828989ad87af15b555f783a70efa2cc526b35b3f Mon Sep 17 00:00:00 2001 From: Santosh Shilimkar Date: Mon, 10 Jun 2013 11:27:13 -0400 Subject: ARM: keystone: Add minimal TI Keystone platform support Texas Instruments Keystone family of multi-core devices are based on ARM Cortex A15. Patch adds basic definitions for a new Keystone sub-architecture in ARM. The TCI66xxK2H Communications Infrastructure Keystone SoCs are member of the C66x family based on TI's new KeyStone 2 multi-core SoC Architecture designed specifically for high performance wireless and networking infrastructure applications. The SOCs contains many subsystems like Cortex A15 ARM CorePacs, C66XX DSP CorePacs, MSMC memory controller, Tera Net bus, IP Network, Navigator, Hyperlink, 1G/10G Ethernet, Radio layers and queue based communication systems. Cc: Arnd Bergmann Cc: arm@kernel.org Acked-by: Olof Johansson Signed-off-by: Santosh Shilimkar --- arch/arm/mach-keystone/Kconfig | 14 +++++++ arch/arm/mach-keystone/Makefile | 1 + arch/arm/mach-keystone/Makefile.boot | 1 + arch/arm/mach-keystone/keystone.c | 71 ++++++++++++++++++++++++++++++++++++ 4 files changed, 87 insertions(+) create mode 100644 arch/arm/mach-keystone/Kconfig create mode 100644 arch/arm/mach-keystone/Makefile create mode 100644 arch/arm/mach-keystone/Makefile.boot create mode 100644 arch/arm/mach-keystone/keystone.c (limited to 'arch/arm/mach-keystone') diff --git a/arch/arm/mach-keystone/Kconfig b/arch/arm/mach-keystone/Kconfig new file mode 100644 index 000000000000..aebe8cdd88fc --- /dev/null +++ b/arch/arm/mach-keystone/Kconfig @@ -0,0 +1,14 @@ +config ARCH_KEYSTONE + bool "Texas Instruments Keystone Devices" + depends on ARCH_MULTI_V7 + select CPU_V7 + select ARM_GIC + select HAVE_ARM_ARCH_TIMER + select CLKSRC_MMIO + select GENERIC_CLOCKEVENTS + select HAVE_SCHED_CLOCK + select ARCH_WANT_OPTIONAL_GPIOLIB + select ARM_ERRATA_798181 + 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 000000000000..d4671d55215a --- /dev/null +++ b/arch/arm/mach-keystone/Makefile @@ -0,0 +1 @@ +obj-y := keystone.o diff --git a/arch/arm/mach-keystone/Makefile.boot b/arch/arm/mach-keystone/Makefile.boot new file mode 100644 index 000000000000..f3835c43af61 --- /dev/null +++ b/arch/arm/mach-keystone/Makefile.boot @@ -0,0 +1 @@ +zreladdr-y := 0x80008000 diff --git a/arch/arm/mach-keystone/keystone.c b/arch/arm/mach-keystone/keystone.c new file mode 100644 index 000000000000..a67c19b8be20 --- /dev/null +++ b/arch/arm/mach-keystone/keystone.c @@ -0,0 +1,71 @@ +/* + * Keystone2 based boards and SOC related code. + * + * Copyright 2013 Texas Instruments, Inc. + * Cyril Chemparathy + * Santosh Shilimkar + * + * 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. + */ +#include +#include +#include +#include +#include + +#include +#include +#include +#include + +#define PLL_RESET_WRITE_KEY_MASK 0xffff0000 +#define PLL_RESET_WRITE_KEY 0x5a69 +#define PLL_RESET BIT(16) + +static void __iomem *keystone_rstctrl; + +static void __init keystone_init(void) +{ + struct device_node *node; + + node = of_find_compatible_node(NULL, NULL, "ti,keystone-reset"); + if (WARN_ON(!node)) + pr_warn("ti,keystone-reset node undefined\n"); + + keystone_rstctrl = of_iomap(node, 0); + if (WARN_ON(!keystone_rstctrl)) + pr_warn("ti,keystone-reset iomap error\n"); + + of_platform_populate(NULL, of_default_bus_match_table, NULL, NULL); +} + +static const char *keystone_match[] __initconst = { + "ti,keystone-evm", + NULL, +}; + +void keystone_restart(char mode, const char *cmd) +{ + u32 val; + + BUG_ON(!keystone_rstctrl); + + /* Enable write access to RSTCTRL */ + val = readl(keystone_rstctrl); + val &= PLL_RESET_WRITE_KEY_MASK; + val |= PLL_RESET_WRITE_KEY; + writel(val, keystone_rstctrl); + + /* Reset the SOC */ + val = readl(keystone_rstctrl); + val &= ~PLL_RESET; + writel(val, keystone_rstctrl); +} + +DT_MACHINE_START(KEYSTONE, "Keystone") + .init_machine = keystone_init, + .dt_compat = keystone_match, + .restart = keystone_restart, +MACHINE_END -- cgit v1.2.3