LXR linux/drivers/clk/sirf/clk-atlas6.c

   1/*
   2 * Clock tree for CSR SiRFatlasVI
   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 "atlas6.h"
  19#include "clk-common.c"
  20
  21static struct clk_dmn clk_mmc01 = {
  22        .regofs = SIRFSOC_CLKC_MMC01_CFG,
  23        .enable_bit = 59,
  24        .hw = {
  25                .init = &clk_mmc01_init,
  26        },
  27};
  28
  29static struct clk_dmn clk_mmc23 = {
  30        .regofs = SIRFSOC_CLKC_MMC23_CFG,
  31        .enable_bit = 60,
  32        .hw = {
  33                .init = &clk_mmc23_init,
  34        },
  35};
  36
  37static struct clk_dmn clk_mmc45 = {
  38        .regofs = SIRFSOC_CLKC_MMC45_CFG,
  39        .enable_bit = 61,
  40        .hw = {
  41                .init = &clk_mmc45_init,
  42        },
  43};
  44
  45static struct clk_init_data clk_nand_init = {
  46        .name = "nand",
  47        .ops = &dmn_ops,
  48        .parent_names = dmn_clk_parents,
  49        .num_parents = ARRAY_SIZE(dmn_clk_parents),
  50};
  51
  52static struct clk_dmn clk_nand = {
  53        .regofs = SIRFSOC_CLKC_NAND_CFG,
  54        .enable_bit = 34,
  55        .hw = {
  56                .init = &clk_nand_init,
  57        },
  58};
  59
  60enum atlas6_clk_index {
  61        /* 0    1     2      3      4      5      6       7         8      9 */
  62        rtc,    osc,   pll1,  pll2,  pll3,  mem,   sys,   security, dsp,   gps,
  63        mf,     io,    cpu,   uart0, uart1, uart2, tsc,   i2c0,     i2c1,  spi0,
  64        spi1,   pwmc,  efuse, pulse, dmac0, dmac1, nand,  audio,    usp0,  usp1,
  65        usp2,   vip,   gfx,   gfx2d,    lcd,   vpp,   mmc01, mmc23,    mmc45, usbpll,
  66        usb0,  usb1,   cphif, maxclk,
  67};
  68
  69static __initdata struct clk_hw *atlas6_clk_hw_array[maxclk] = {
  70        NULL, /* dummy */
  71        NULL,
  72        &clk_pll1.hw,
  73        &clk_pll2.hw,
  74        &clk_pll3.hw,
  75        &clk_mem.hw,
  76        &clk_sys.hw,
  77        &clk_security.hw,
  78        &clk_dsp.hw,
  79        &clk_gps.hw,
  80        &clk_mf.hw,
  81        &clk_io.hw,
  82        &clk_cpu.hw,
  83        &clk_uart0.hw,
  84        &clk_uart1.hw,
  85        &clk_uart2.hw,
  86        &clk_tsc.hw,
  87        &clk_i2c0.hw,
  88        &clk_i2c1.hw,
  89        &clk_spi0.hw,
  90        &clk_spi1.hw,
  91        &clk_pwmc.hw,
  92        &clk_efuse.hw,
  93        &clk_pulse.hw,
  94        &clk_dmac0.hw,
  95        &clk_dmac1.hw,
  96        &clk_nand.hw,
  97        &clk_audio.hw,
  98        &clk_usp0.hw,
  99        &clk_usp1.hw,
 100        &clk_usp2.hw,
 101        &clk_vip.hw,
 102        &clk_gfx.hw,
 103        &clk_gfx2d.hw,
 104        &clk_lcd.hw,
 105        &clk_vpp.hw,
 106        &clk_mmc01.hw,
 107        &clk_mmc23.hw,
 108        &clk_mmc45.hw,
 109        &usb_pll_clk_hw,
 110        &clk_usb0.hw,
 111        &clk_usb1.hw,
 112        &clk_cphif.hw,
 113};
 114
 115static struct clk *atlas6_clks[maxclk];
 116
 117static void __init atlas6_clk_init(struct device_node *np)
 118{
 119        struct device_node *rscnp;
 120        int i;
 121
 122        rscnp = of_find_compatible_node(NULL, NULL, "sirf,prima2-rsc");
 123        sirfsoc_rsc_vbase = of_iomap(rscnp, 0);
 124        if (!sirfsoc_rsc_vbase)
 125                panic("unable to map rsc registers\n");
 126        of_node_put(rscnp);
 127
 128        sirfsoc_clk_vbase = of_iomap(np, 0);
 129        if (!sirfsoc_clk_vbase)
 130                panic("unable to map clkc registers\n");
 131
 132        /* These are always available (RTC and 26MHz OSC)*/
 133        atlas6_clks[rtc] = clk_register_fixed_rate(NULL, "rtc", NULL, 0, 32768);
 134        atlas6_clks[osc] = clk_register_fixed_rate(NULL, "osc", NULL, 0,
 135                                                   26000000);
 136
 137        for (i = pll1; i < maxclk; i++) {
 138                atlas6_clks[i] = clk_register(NULL, atlas6_clk_hw_array[i]);
 139                BUG_ON(!atlas6_clks[i]);
 140        }
 141        clk_register_clkdev(atlas6_clks[cpu], NULL, "cpu");
 142        clk_register_clkdev(atlas6_clks[io],  NULL, "io");
 143        clk_register_clkdev(atlas6_clks[mem],  NULL, "mem");
 144        clk_register_clkdev(atlas6_clks[mem],  NULL, "osc");
 145
 146        clk_data.clks = atlas6_clks;
 147        clk_data.clk_num = maxclk;
 148
 149        of_clk_add_provider(np, of_clk_src_onecell_get, &clk_data);
 150}
 151CLK_OF_DECLARE(atlas6_clk, "sirf,atlas6-clkc", atlas6_clk_init);
 152