| David Brazdil | 0f672f6 | 2019-12-10 10:32:29 +0000 | [diff] [blame^] | 1 | // SPDX-License-Identifier: GPL-2.0-only |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 2 | /* |
| 3 | * linux/arch/arm/mach-pxa/generic.c |
| 4 | * |
| 5 | * Author: Nicolas Pitre |
| 6 | * Created: Jun 15, 2001 |
| 7 | * Copyright: MontaVista Software Inc. |
| 8 | * |
| 9 | * Code common to all PXA machines. |
| 10 | * |
| Andrew Scull | b4b6d4a | 2019-01-02 15:54:55 +0000 | [diff] [blame] | 11 | * Since this file should be linked before any other machine specific file, |
| 12 | * the __initcall() here will be executed first. This serves as default |
| 13 | * initialization stuff for PXA machines which can be overridden later if |
| 14 | * need be. |
| 15 | */ |
| 16 | #include <linux/gpio.h> |
| 17 | #include <linux/module.h> |
| 18 | #include <linux/kernel.h> |
| 19 | #include <linux/init.h> |
| 20 | |
| 21 | #include <mach/hardware.h> |
| 22 | #include <asm/mach/map.h> |
| 23 | #include <asm/mach-types.h> |
| 24 | |
| 25 | #include <mach/irqs.h> |
| 26 | #include <mach/reset.h> |
| 27 | #include <mach/smemc.h> |
| 28 | #include <mach/pxa3xx-regs.h> |
| 29 | |
| 30 | #include "generic.h" |
| 31 | #include <clocksource/pxa.h> |
| 32 | |
| 33 | void clear_reset_status(unsigned int mask) |
| 34 | { |
| 35 | if (cpu_is_pxa2xx()) |
| 36 | pxa2xx_clear_reset_status(mask); |
| 37 | else { |
| 38 | /* RESET_STATUS_* has a 1:1 mapping with ARSR */ |
| 39 | ARSR = mask; |
| 40 | } |
| 41 | } |
| 42 | |
| 43 | /* |
| 44 | * For non device-tree builds, keep legacy timer init |
| 45 | */ |
| 46 | void __init pxa_timer_init(void) |
| 47 | { |
| 48 | if (cpu_is_pxa25x()) |
| 49 | pxa25x_clocks_init(); |
| 50 | if (cpu_is_pxa27x()) |
| 51 | pxa27x_clocks_init(); |
| 52 | if (cpu_is_pxa3xx()) |
| 53 | pxa3xx_clocks_init(); |
| 54 | pxa_timer_nodt_init(IRQ_OST0, io_p2v(0x40a00000)); |
| 55 | } |
| 56 | |
| 57 | /* |
| 58 | * Get the clock frequency as reflected by CCCR and the turbo flag. |
| 59 | * We assume these values have been applied via a fcs. |
| 60 | * If info is not 0 we also display the current settings. |
| 61 | */ |
| 62 | unsigned int get_clk_frequency_khz(int info) |
| 63 | { |
| 64 | if (cpu_is_pxa25x()) |
| 65 | return pxa25x_get_clk_frequency_khz(info); |
| 66 | else if (cpu_is_pxa27x()) |
| 67 | return pxa27x_get_clk_frequency_khz(info); |
| 68 | return 0; |
| 69 | } |
| 70 | EXPORT_SYMBOL(get_clk_frequency_khz); |
| 71 | |
| 72 | /* |
| 73 | * Intel PXA2xx internal register mapping. |
| 74 | * |
| 75 | * Note: virtual 0xfffe0000-0xffffffff is reserved for the vector table |
| 76 | * and cache flush area. |
| 77 | */ |
| 78 | static struct map_desc common_io_desc[] __initdata = { |
| 79 | { /* Devs */ |
| 80 | .virtual = (unsigned long)PERIPH_VIRT, |
| 81 | .pfn = __phys_to_pfn(PERIPH_PHYS), |
| 82 | .length = PERIPH_SIZE, |
| 83 | .type = MT_DEVICE |
| 84 | } |
| 85 | }; |
| 86 | |
| 87 | void __init pxa_map_io(void) |
| 88 | { |
| 89 | debug_ll_io_init(); |
| 90 | iotable_init(ARRAY_AND_SIZE(common_io_desc)); |
| 91 | } |