diff options
Diffstat (limited to 'arch/arm/mach-omap2/io.c')
| -rw-r--r-- | arch/arm/mach-omap2/io.c | 88 |
1 files changed, 86 insertions, 2 deletions
diff --git a/arch/arm/mach-omap2/io.c b/arch/arm/mach-omap2/io.c index 916fcd3a232..3a86b0f6603 100644 --- a/arch/arm/mach-omap2/io.c +++ b/arch/arm/mach-omap2/io.c @@ -4,12 +4,14 @@ * OMAP2 I/O mapping code * * Copyright (C) 2005 Nokia Corporation - * Copyright (C) 2007 Texas Instruments + * Copyright (C) 2007-2009 Texas Instruments * * Author: * Juha Yrjola <juha.yrjola@nokia.com> * Syed Khasim <x0khasim@ti.com> * + * Added OMAP4 support - Santosh Shilimkar <santosh.shilimkar@ti.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. @@ -19,6 +21,7 @@ #include <linux/kernel.h> #include <linux/init.h> #include <linux/io.h> +#include <linux/clk.h> #include <asm/tlb.h> @@ -30,6 +33,7 @@ #include <mach/sdrc.h> #include <mach/gpmc.h> +#ifndef CONFIG_ARCH_OMAP4 /* FIXME: Remove this once clkdev is ready */ #include "clock.h" #include <mach/powerdomain.h> @@ -38,7 +42,7 @@ #include <mach/clockdomain.h> #include "clockdomains.h" - +#endif /* * The machine specific code may provide the extra mapping besides the * default mapping provided here. @@ -166,6 +170,46 @@ static struct map_desc omap34xx_io_desc[] __initdata = { }, }; #endif +#ifdef CONFIG_ARCH_OMAP4 +static struct map_desc omap44xx_io_desc[] __initdata = { + { + .virtual = L3_44XX_VIRT, + .pfn = __phys_to_pfn(L3_44XX_PHYS), + .length = L3_44XX_SIZE, + .type = MT_DEVICE, + }, + { + .virtual = L4_44XX_VIRT, + .pfn = __phys_to_pfn(L4_44XX_PHYS), + .length = L4_44XX_SIZE, + .type = MT_DEVICE, + }, + { + .virtual = L4_WK_44XX_VIRT, + .pfn = __phys_to_pfn(L4_WK_44XX_PHYS), + .length = L4_WK_44XX_SIZE, + .type = MT_DEVICE, + }, + { + .virtual = OMAP44XX_GPMC_VIRT, + .pfn = __phys_to_pfn(OMAP44XX_GPMC_PHYS), + .length = OMAP44XX_GPMC_SIZE, + .type = MT_DEVICE, + }, + { + .virtual = L4_PER_44XX_VIRT, + .pfn = __phys_to_pfn(L4_PER_44XX_PHYS), + .length = L4_PER_44XX_SIZE, + .type = MT_DEVICE, + }, + { + .virtual = L4_EMU_44XX_VIRT, + .pfn = __phys_to_pfn(L4_EMU_44XX_PHYS), + .length = L4_EMU_44XX_SIZE, + .type = MT_DEVICE, + }, +}; +#endif void __init omap2_map_common_io(void) { @@ -183,6 +227,9 @@ void __init omap2_map_common_io(void) iotable_init(omap34xx_io_desc, ARRAY_SIZE(omap34xx_io_desc)); #endif +#if defined(CONFIG_ARCH_OMAP4) + iotable_init(omap44xx_io_desc, ARRAY_SIZE(omap44xx_io_desc)); +#endif /* Normally devicemaps_init() would flush caches and tlb after * mdesc->map_io(), but we must also do it here because of the CPU * revision check below. @@ -195,12 +242,49 @@ void __init omap2_map_common_io(void) omapfb_reserve_sdram(); } +/* + * omap2_init_reprogram_sdrc - reprogram SDRC timing parameters + * + * Sets the CORE DPLL3 M2 divider to the same value that it's at + * currently. This has the effect of setting the SDRC SDRAM AC timing + * registers to the values currently defined by the kernel. Currently + * only defined for OMAP3; will return 0 if called on OMAP2. Returns + * -EINVAL if the dpll3_m2_ck cannot be found, 0 if called on OMAP2, + * or passes along the return value of clk_set_rate(). + */ +static int __init _omap2_init_reprogram_sdrc(void) +{ + struct clk *dpll3_m2_ck; + int v = -EINVAL; + long rate; + + if (!cpu_is_omap34xx()) + return 0; + + dpll3_m2_ck = clk_get(NULL, "dpll3_m2_ck"); + if (!dpll3_m2_ck) + return -EINVAL; + + rate = clk_get_rate(dpll3_m2_ck); + pr_info("Reprogramming SDRC clock to %ld Hz\n", rate); + v = clk_set_rate(dpll3_m2_ck, rate); + if (v) + pr_err("dpll3_m2_clk rate change failed: %d\n", v); + + clk_put(dpll3_m2_ck); + + return v; +} + void __init omap2_init_common_hw(struct omap_sdrc_params *sp) { omap2_mux_init(); +#ifndef CONFIG_ARCH_OMAP4 /* FIXME: Remove this once the clkdev is ready */ pwrdm_init(powerdomains_omap); clkdm_init(clockdomains_omap, clkdm_pwrdm_autodeps); omap2_clk_init(); omap2_sdrc_init(sp); + _omap2_init_reprogram_sdrc(); +#endif gpmc_init(); } |