arch/arm/mach-spear/spear3xx.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * arch/arm/mach-spear3xx/spear3xx.c
   4  *
   5  * SPEAr3XX machines common source file
   6  *
   7  * Copyright (C) 2009-2012 ST Microelectronics
   8  * Viresh Kumar <vireshk@kernel.org>
   9  */
  10
  11 #define pr_fmt(fmt) "SPEAr3xx: " fmt
  12
  13 #include <linux/amba/pl022.h>
  14 #include <linux/amba/pl080.h>
  15 #include <linux/clk.h>
  16 #include <linux/clk/spear.h>
  17 #include <linux/io.h>
  18 #include <asm/mach/map.h>
  19 #include "pl080.h"
  20 #include "generic.h"
  21 #include "spear.h"
  22 #include "misc_regs.h"
  23
  24 /* ssp device registration */
  25 struct pl022_ssp_controller pl022_plat_data = {
  26         .bus_id = 0,
  27         .enable_dma = 1,
  28         .dma_filter = pl08x_filter_id,
  29         .dma_tx_param = "ssp0_tx",
  30         .dma_rx_param = "ssp0_rx",
  31 };
  32
  33 /* dmac device registration */
  34 struct pl08x_platform_data pl080_plat_data = {
  35         .memcpy_burst_size = PL08X_BURST_SZ_16,
  36         .memcpy_bus_width = PL08X_BUS_WIDTH_32_BITS,
  37         .memcpy_prot_buff = true,
  38         .memcpy_prot_cache = true,
  39         .lli_buses = PL08X_AHB1,
  40         .mem_buses = PL08X_AHB1,
  41         .get_xfer_signal = pl080_get_signal,
  42         .put_xfer_signal = pl080_put_signal,
  43 };
  44
  45 /*
  46  * Following will create 16MB static virtual/physical mappings
  47  * PHYSICAL             VIRTUAL
  48  * 0xD0000000           0xFD000000
  49  * 0xFC000000           0xFC000000
  50  */
  51 struct map_desc spear3xx_io_desc[] __initdata = {
  52         {
  53                 .virtual        = (unsigned long)VA_SPEAR_ICM1_2_BASE,
  54                 .pfn            = __phys_to_pfn(SPEAR_ICM1_2_BASE),
  55                 .length         = SZ_16M,
  56                 .type           = MT_DEVICE
  57         }, {
  58                 .virtual        = (unsigned long)VA_SPEAR_ICM3_SMI_CTRL_BASE,
  59                 .pfn            = __phys_to_pfn(SPEAR_ICM3_SMI_CTRL_BASE),
  60                 .length         = SZ_16M,
  61                 .type           = MT_DEVICE
  62         },
  63 };
  64
  65 /* This will create static memory mapping for selected devices */
  66 void __init spear3xx_map_io(void)
  67 {
  68         iotable_init(spear3xx_io_desc, ARRAY_SIZE(spear3xx_io_desc));
  69 }
  70
  71 void __init spear3xx_timer_init(void)
  72 {
  73         char pclk_name[] = "pll3_clk";
  74         struct clk *gpt_clk, *pclk;
  75
  76         spear3xx_clk_init(MISC_BASE, VA_SPEAR320_SOC_CONFIG_BASE);
  77
  78         /* get the system timer clock */
  79         gpt_clk = clk_get_sys("gpt0", NULL);
  80         if (IS_ERR(gpt_clk)) {
  81                 pr_err("%s:couldn't get clk for gpt\n", __func__);
  82                 BUG();
  83         }
  84
  85         /* get the suitable parent clock for timer*/
  86         pclk = clk_get(NULL, pclk_name);
  87         if (IS_ERR(pclk)) {
  88                 pr_err("%s:couldn't get %s as parent for gpt\n",
  89                                 __func__, pclk_name);
  90                 BUG();
  91         }
  92
  93         clk_set_parent(gpt_clk, pclk);
  94         clk_put(gpt_clk);
  95         clk_put(pclk);
  96
  97         spear_setup_of_timer();
  98 }