drivers/clk/sirf/clk-prima2.c

   1 /*
   2  * Clock tree for CSR SiRFprimaII
   3  *
   4  * Copyright (c) 2011 - 2014 Cambridge Silicon Radio Limited, a CSR plc group
   5  * company.
   6  *
   7  * Licensed under GPLv2 or later.
   8  */
   9
  10 #include <linux/module.h>
  11 #include <linux/bitops.h>
  12 #include <linux/io.h>
  13 #include <linux/clkdev.h>
  14 #include <linux/clk-provider.h>
  15 #include <linux/of_address.h>
  16 #include <linux/syscore_ops.h>
  17
  18 #include "prima2.h"
  19 #include "clk-common.c"
  20
  21 static struct clk_dmn clk_mmc01 = {
  22         .regofs = SIRFSOC_CLKC_MMC_CFG,
  23         .enable_bit = 59,
  24         .hw = {
  25                 .init = &clk_mmc01_init,
  26         },
  27 };
  28
  29 static struct clk_dmn clk_mmc23 = {
  30         .regofs = SIRFSOC_CLKC_MMC_CFG,
  31         .enable_bit = 60,
  32         .hw = {
  33                 .init = &clk_mmc23_init,
  34         },
  35 };
  36
  37 static struct clk_dmn clk_mmc45 = {
  38         .regofs = SIRFSOC_CLKC_MMC_CFG,
  39         .enable_bit = 61,
  40         .hw = {
  41                 .init = &clk_mmc45_init,
  42         },
  43 };
  44
  45 static struct clk_init_data clk_nand_init = {
  46         .name = "nand",
  47         .ops = &ios_ops,
  48         .parent_names = std_clk_io_parents,
  49         .num_parents = ARRAY_SIZE(std_clk_io_parents),
  50 };
  51
  52 static struct clk_std clk_nand = {
  53         .enable_bit = 34,
  54         .hw = {
  55                 .init = &clk_nand_init,
  56         },
  57 };
  58
  59 enum prima2_clk_index {
  60         /* 0    1     2      3      4      5      6       7         8      9 */
  61         rtc,    osc,   pll1,  pll2,  pll3,  mem,   sys,   security, dsp,   gps,
  62         mf,     io,    cpu,   uart0, uart1, uart2, tsc,   i2c0,     i2c1,  spi0,
  63         spi1,   pwmc,  efuse, pulse, dmac0, dmac1, nand,  audio,    usp0,  usp1,
  64         usp2,   vip,   gfx,   mm,    lcd,   vpp,   mmc01, mmc23,    mmc45, usbpll,
  65         usb0,  usb1,   cphif, maxclk,
  66 };
  67
  68 static __initdata struct clk_hw *prima2_clk_hw_array[maxclk] = {
  69         NULL, /* dummy */
  70         NULL,
  71         &clk_pll1.hw,
  72         &clk_pll2.hw,
  73         &clk_pll3.hw,
  74         &clk_mem.hw,
  75         &clk_sys.hw,
  76         &clk_security.hw,
  77         &clk_dsp.hw,
  78         &clk_gps.hw,
  79         &clk_mf.hw,
  80         &clk_io.hw,
  81         &clk_cpu.hw,
  82         &clk_uart0.hw,
  83         &clk_uart1.hw,
  84         &clk_uart2.hw,
  85         &clk_tsc.hw,
  86         &clk_i2c0.hw,
  87         &clk_i2c1.hw,
  88         &clk_spi0.hw,
  89         &clk_spi1.hw,
  90         &clk_pwmc.hw,
  91         &clk_efuse.hw,
  92         &clk_pulse.hw,
  93         &clk_dmac0.hw,
  94         &clk_dmac1.hw,
  95         &clk_nand.hw,
  96         &clk_audio.hw,
  97         &clk_usp0.hw,
  98         &clk_usp1.hw,
  99         &clk_usp2.hw,
 100         &clk_vip.hw,
 101         &clk_gfx.hw,
 102         &clk_mm.hw,
 103         &clk_lcd.hw,
 104         &clk_vpp.hw,
 105         &clk_mmc01.hw,
 106         &clk_mmc23.hw,
 107         &clk_mmc45.hw,
 108         &usb_pll_clk_hw,
 109         &clk_usb0.hw,
 110         &clk_usb1.hw,
 111         &clk_cphif.hw,
 112 };
 113
 114 static struct clk *prima2_clks[maxclk];
 115
 116 static void __init prima2_clk_init(struct device_node *np)
 117 {
 118         struct device_node *rscnp;
 119         int i;
 120
 121         rscnp = of_find_compatible_node(NULL, NULL, "sirf,prima2-rsc");
 122         sirfsoc_rsc_vbase = of_iomap(rscnp, 0);
 123         if (!sirfsoc_rsc_vbase)
 124                 panic("unable to map rsc registers\n");
 125         of_node_put(rscnp);
 126
 127         sirfsoc_clk_vbase = of_iomap(np, 0);
 128         if (!sirfsoc_clk_vbase)
 129                 panic("unable to map clkc registers\n");
 130
 131         /* These are always available (RTC and 26MHz OSC)*/
 132         prima2_clks[rtc] = clk_register_fixed_rate(NULL, "rtc", NULL,
 133                 CLK_IS_ROOT, 32768);
 134         prima2_clks[osc] = clk_register_fixed_rate(NULL, "osc", NULL,
 135                 CLK_IS_ROOT, 26000000);
 136
 137         for (i = pll1; i < maxclk; i++) {
 138                 prima2_clks[i] = clk_register(NULL, prima2_clk_hw_array[i]);
 139                 BUG_ON(!prima2_clks[i]);
 140         }
 141         clk_register_clkdev(prima2_clks[cpu], NULL, "cpu");
 142         clk_register_clkdev(prima2_clks[io],  NULL, "io");
 143         clk_register_clkdev(prima2_clks[mem],  NULL, "mem");
 144         clk_register_clkdev(prima2_clks[mem],  NULL, "osc");
 145
 146         clk_data.clks = prima2_clks;
 147         clk_data.clk_num = maxclk;
 148
 149         of_clk_add_provider(np, of_clk_src_onecell_get, &clk_data);
 150 }
 151 CLK_OF_DECLARE(prima2_clk, "sirf,prima2-clkc", prima2_clk_init);