LXR linux/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
  12void __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}
  48