arch/arm/cpu/armv7/sc8830/clock_test.c

   1 #include <ubi_uboot.h>\r
   2 #include <linux/compiler.h>\r
   3 #include <asm/arch/clock.h>\r
   4 \r
   5 extern const u32 __clkinit0 __clkinit_begin;\r
   6 extern const u32 __clkinit2 __clkinit_end;\r
   7 \r
   8 static unsigned int get_clock_rate(const char *clk_name)\r
   9 {       \r
  10         unsigned int rate;\r
  11         struct clk *clk;\r
  12 \r
  13         clk =clk_get(0, clk_name);\r
  14 \r
  15         if (clk == NULL)\r
  16         {\r
  17                 printf("%s can't find!\r\n");\r
  18                 return 0;\r
  19         }\r
  20 \r
  21         if (clk->ops)\r
  22         {\r
  23                 rate = clk->ops->get_rate(clk);\r
  24         }\r
  25         else\r
  26         {\r
  27                 rate = clk->rate;\r
  28         }\r
  29         printf("%s : %d\r\n", clk_name, rate);\r
  30         return rate;\r
  31 }\r
  32 \r
  33 static unsigned int change_clock_rate(const *clk_name, unsigned int rate)\r
  34 {\r
  35         struct clk *clk;\r
  36 \r
  37         clk =clk_get(0, clk_name);\r
  38 \r
  39         if (clk == NULL)\r
  40         {\r
  41                 printf("%s can't find!\r\n");\r
  42                 return -1;\r
  43         }\r
  44 \r
  45         if (clk->ops)\r
  46         {\r
  47                 if (clk->ops->set_rate)\r
  48                 {\r
  49                         clk->ops->set_rate(clk, rate);\r
  50                 }\r
  51                 else\r
  52                 {\r
  53                         return -1;\r
  54                 }\r
  55         }\r
  56         else\r
  57         {\r
  58                 return -1;\r
  59         }\r
  60         printf("%s ==> %d\r\n", clk_name, rate);\r
  61         return 0;\r
  62 }\r
  63 \r
  64 void clock_test()\r
  65 {\r
  66         struct clk *clk;\r
  67                 \r
  68         sci_clock_init();\r
  69 \r
  70         printf("clock_test, __clkinit_begin:%08X (%08X), __clkinit_end:%08X (%08X)\r\n\r\n", \r
  71                 &__clkinit_begin, __clkinit_begin, &__clkinit_end, __clkinit_end);\r
  72 \r
  73         {\r
  74                 struct clk_lookup *cl = (struct clk_lookup *)(&__clkinit_begin + 1);\r
  75                 while (cl < (struct clk_lookup *)&__clkinit_end)\r
  76                 {\r
  77                         clk =clk_get(0, cl->con_id);\r
  78                         if (clk != ERR_PTR(-2))\r
  79                         {\r
  80                                 if (clk->ops)\r
  81                                 {\r
  82                                         printf("1.clk: %s, rate: %d\r\n", cl->con_id, clk->ops->get_rate(clk));\r
  83                                 }\r
  84                                 else\r
  85                                 {\r
  86                                         printf("2.clk: %s, rate: %d\r\n", cl->con_id, clk->rate);\r
  87                                 }\r
  88                         }\r
  89                         else\r
  90                         {\r
  91                                 printf("get %s error!\r\n", cl->con_id);\r
  92                         }\r
  93                         cl++;\r
  94                 }
  95         }\r
  96         printf("---------------------------------------\r\n");\r
  97         get_clock_rate("clk_arm");\r
  98         get_clock_rate("clk_axi");\r
  99         get_clock_rate("clk_ahb");\r
 100         get_clock_rate("clk_apb");\r
 101         \r
 102         get_clock_rate("clk_emmc");\r
 103         change_clock_rate("clk_emmc", 192000000);\r
 104         get_clock_rate("clk_emmc");\r
 105         \r
 106         get_clock_rate("clk_apb");\r
 107         change_clock_rate("clk_apb", 100000000);\r
 108         get_clock_rate("clk_apb");\r
 109 \r
 110 \r
 111         get_clock_rate("clk_emc");\r
 112         change_clock_rate("clk_emc", 100000000);\r
 113         get_clock_rate("clk_emc");\r
 114 \r
 115         get_clock_rate("clk_dbg");\r
 116         change_clock_rate("clk_dbg", 200000000);\r
 117         get_clock_rate("clk_dbg");\r
 118 \r
 119         printf("clock test end!\r\n");\r
 120 }\r
 121 \r