drivers/clk/clk-nomadik.c

   1 #include <linux/clk.h>
   2 #include <linux/clkdev.h>
   3 #include <linux/err.h>
   4 #include <linux/io.h>
   5 #include <linux/clk-provider.h>
   6
   7 /*
   8  * The Nomadik clock tree is described in the STN8815A12 DB V4.2
   9  * reference manual for the chip, page 94 ff.
  10  */
  11
  12 void __init nomadik_clk_init(void)
  13 {
  14         struct clk *clk;
  15
  16         clk = clk_register_fixed_rate(NULL, "apb_pclk", NULL, CLK_IS_ROOT, 0);
  17         clk_register_clkdev(clk, "apb_pclk", NULL);
  18         clk_register_clkdev(clk, NULL, "gpio.0");
  19         clk_register_clkdev(clk, NULL, "gpio.1");
  20         clk_register_clkdev(clk, NULL, "gpio.2");
  21         clk_register_clkdev(clk, NULL, "gpio.3");
  22         clk_register_clkdev(clk, NULL, "rng");
  23
  24         /*
  25          * The 2.4 MHz TIMCLK reference clock is active at boot time, this is
  26          * actually the MXTALCLK @19.2 MHz divided by 8. This clock is used
  27          * by the timers and watchdog. See page 105 ff.
  28          */
  29         clk = clk_register_fixed_rate(NULL, "TIMCLK", NULL, CLK_IS_ROOT,
  30                                       2400000);
  31         clk_register_clkdev(clk, NULL, "mtu0");
  32         clk_register_clkdev(clk, NULL, "mtu1");
  33
  34         /*
  35          * At boot time, PLL2 is set to generate a set of fixed clocks,
  36          * one of them is CLK48, the 48 MHz clock, routed to the UART, MMC/SD
  37          * I2C, IrDA, USB and SSP blocks.
  38          */
  39         clk = clk_register_fixed_rate(NULL, "CLK48", NULL, CLK_IS_ROOT,
  40                                       48000000);
  41         clk_register_clkdev(clk, NULL, "uart0");
  42         clk_register_clkdev(clk, NULL, "uart1");
  43         clk_register_clkdev(clk, NULL, "mmci");
  44         clk_register_clkdev(clk, NULL, "ssp");
  45         clk_register_clkdev(clk, NULL, "nmk-i2c.0");
  46         clk_register_clkdev(clk, NULL, "nmk-i2c.1");
  47 }