arch/arm/mach-s3c/pll-s3c2440-12000000.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 //
   3 // Copyright (c) 2006-2007 Simtec Electronics
   4 //      http://armlinux.simtec.co.uk/
   5 //      Ben Dooks <ben@simtec.co.uk>
   6 //      Vincent Sanders <vince@arm.linux.org.uk>
   7 //
   8 // S3C2440/S3C2442 CPU PLL tables (12MHz Crystal)
   9
  10 #include <linux/types.h>
  11 #include <linux/kernel.h>
  12 #include <linux/device.h>
  13 #include <linux/clk.h>
  14 #include <linux/err.h>
  15
  16 #include <linux/soc/samsung/s3c-cpufreq-core.h>
  17 #include <linux/soc/samsung/s3c-pm.h>
  18
  19 /* This array should be sorted in ascending order of the frequencies */
  20 static struct cpufreq_frequency_table s3c2440_plls_12[] = {
  21         { .frequency = 75000000,        .driver_data = PLLVAL(0x75, 3, 3),  },  /* FVco 600.000000 */
  22         { .frequency = 80000000,        .driver_data = PLLVAL(0x98, 4, 3),  },  /* FVco 640.000000 */
  23         { .frequency = 90000000,        .driver_data = PLLVAL(0x70, 2, 3),  },  /* FVco 720.000000 */
  24         { .frequency = 100000000,       .driver_data = PLLVAL(0x5c, 1, 3),  },  /* FVco 800.000000 */
  25         { .frequency = 110000000,       .driver_data = PLLVAL(0x66, 1, 3),  },  /* FVco 880.000000 */
  26         { .frequency = 120000000,       .driver_data = PLLVAL(0x70, 1, 3),  },  /* FVco 960.000000 */
  27         { .frequency = 150000000,       .driver_data = PLLVAL(0x75, 3, 2),  },  /* FVco 600.000000 */
  28         { .frequency = 160000000,       .driver_data = PLLVAL(0x98, 4, 2),  },  /* FVco 640.000000 */
  29         { .frequency = 170000000,       .driver_data = PLLVAL(0x4d, 1, 2),  },  /* FVco 680.000000 */
  30         { .frequency = 180000000,       .driver_data = PLLVAL(0x70, 2, 2),  },  /* FVco 720.000000 */
  31         { .frequency = 190000000,       .driver_data = PLLVAL(0x57, 1, 2),  },  /* FVco 760.000000 */
  32         { .frequency = 200000000,       .driver_data = PLLVAL(0x5c, 1, 2),  },  /* FVco 800.000000 */
  33         { .frequency = 210000000,       .driver_data = PLLVAL(0x84, 2, 2),  },  /* FVco 840.000000 */
  34         { .frequency = 220000000,       .driver_data = PLLVAL(0x66, 1, 2),  },  /* FVco 880.000000 */
  35         { .frequency = 230000000,       .driver_data = PLLVAL(0x6b, 1, 2),  },  /* FVco 920.000000 */
  36         { .frequency = 240000000,       .driver_data = PLLVAL(0x70, 1, 2),  },  /* FVco 960.000000 */
  37         { .frequency = 300000000,       .driver_data = PLLVAL(0x75, 3, 1),  },  /* FVco 600.000000 */
  38         { .frequency = 310000000,       .driver_data = PLLVAL(0x93, 4, 1),  },  /* FVco 620.000000 */
  39         { .frequency = 320000000,       .driver_data = PLLVAL(0x98, 4, 1),  },  /* FVco 640.000000 */
  40         { .frequency = 330000000,       .driver_data = PLLVAL(0x66, 2, 1),  },  /* FVco 660.000000 */
  41         { .frequency = 340000000,       .driver_data = PLLVAL(0x4d, 1, 1),  },  /* FVco 680.000000 */
  42         { .frequency = 350000000,       .driver_data = PLLVAL(0xa7, 4, 1),  },  /* FVco 700.000000 */
  43         { .frequency = 360000000,       .driver_data = PLLVAL(0x70, 2, 1),  },  /* FVco 720.000000 */
  44         { .frequency = 370000000,       .driver_data = PLLVAL(0xb1, 4, 1),  },  /* FVco 740.000000 */
  45         { .frequency = 380000000,       .driver_data = PLLVAL(0x57, 1, 1),  },  /* FVco 760.000000 */
  46         { .frequency = 390000000,       .driver_data = PLLVAL(0x7a, 2, 1),  },  /* FVco 780.000000 */
  47         { .frequency = 400000000,       .driver_data = PLLVAL(0x5c, 1, 1),  },  /* FVco 800.000000 */
  48 };
  49
  50 static int s3c2440_plls12_add(struct device *dev, struct subsys_interface *sif)
  51 {
  52         struct clk *xtal_clk;
  53         unsigned long xtal;
  54
  55         xtal_clk = clk_get(NULL, "xtal");
  56         if (IS_ERR(xtal_clk))
  57                 return PTR_ERR(xtal_clk);
  58
  59         xtal = clk_get_rate(xtal_clk);
  60         clk_put(xtal_clk);
  61
  62         if (xtal == 12000000) {
  63                 printk(KERN_INFO "Using PLL table for 12MHz crystal\n");
  64                 return s3c_plltab_register(s3c2440_plls_12,
  65                                            ARRAY_SIZE(s3c2440_plls_12));
  66         }
  67
  68         return 0;
  69 }
  70
  71 static struct subsys_interface s3c2440_plls12_interface = {
  72         .name           = "s3c2440_plls12",
  73         .subsys         = &s3c2440_subsys,
  74         .add_dev        = s3c2440_plls12_add,
  75 };
  76
  77 static int __init s3c2440_pll_12mhz(void)
  78 {
  79         return subsys_interface_register(&s3c2440_plls12_interface);
  80
  81 }
  82 arch_initcall(s3c2440_pll_12mhz);
  83
  84 static struct subsys_interface s3c2442_plls12_interface = {
  85         .name           = "s3c2442_plls12",
  86         .subsys         = &s3c2442_subsys,
  87         .add_dev        = s3c2440_plls12_add,
  88 };
  89
  90 static int __init s3c2442_pll_12mhz(void)
  91 {
  92         return subsys_interface_register(&s3c2442_plls12_interface);
  93
  94 }
  95 arch_initcall(s3c2442_pll_12mhz);