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 #include <linux/soc/pxa/cpu.h> 21 22 #include <asm/mach/map.h> 23 #include <asm/mach-types.h> 24 25 #include <mach/addr-map.h> 26 #include <mach/irqs.h> 27 #include <mach/reset.h> 28 #include <mach/smemc.h> 29 #include <mach/pxa3xx-regs.h> 30 31 #include "generic.h" 32 #include <clocksource/pxa.h> 33 34 void clear_reset_status(unsigned int mask) 35 { 36 if (cpu_is_pxa2xx()) 37 pxa2xx_clear_reset_status(mask); 38 else { 39 /* RESET_STATUS_* has a 1:1 mapping with ARSR */ 40 ARSR = mask; 41 } 42 } 43 44 /* 45 * For non device-tree builds, keep legacy timer init 46 */ 47 void __init pxa_timer_init(void) 48 { 49 if (cpu_is_pxa25x()) 50 pxa25x_clocks_init(); 51 if (cpu_is_pxa27x()) 52 pxa27x_clocks_init(); 53 if (cpu_is_pxa3xx()) 54 pxa3xx_clocks_init(); 55 pxa_timer_nodt_init(IRQ_OST0, io_p2v(0x40a00000)); 56 } 57 58 /* 59 * Get the clock frequency as reflected by CCCR and the turbo flag. 60 * We assume these values have been applied via a fcs. 61 * If info is not 0 we also display the current settings. 62 */ 63 unsigned int get_clk_frequency_khz(int info) 64 { 65 if (cpu_is_pxa25x()) 66 return pxa25x_get_clk_frequency_khz(info); 67 else if (cpu_is_pxa27x()) 68 return pxa27x_get_clk_frequency_khz(info); 69 return 0; 70 } 71 EXPORT_SYMBOL(get_clk_frequency_khz); 72 73 /* 74 * Intel PXA2xx internal register mapping. 75 * 76 * Note: virtual 0xfffe0000-0xffffffff is reserved for the vector table 77 * and cache flush area. 78 */ 79 static struct map_desc common_io_desc[] __initdata = { 80 { /* Devs */ 81 .virtual = (unsigned long)PERIPH_VIRT, 82 .pfn = __phys_to_pfn(PERIPH_PHYS), 83 .length = PERIPH_SIZE, 84 .type = MT_DEVICE 85 } 86 }; 87 88 void __init pxa_map_io(void) 89 { 90 debug_ll_io_init(); 91 iotable_init(ARRAY_AND_SIZE(common_io_desc)); 92 } 93