1 // SPDX-License-Identifier: GPL-2.0-only 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 * 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 } 92