drivers/clk/at91/clk-slow.c

   1 /*
   2  * Copyright (C) 2016 Atmel Corporation
   3  *               Wenyou.Yang <wenyou.yang@atmel.com>
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #include <common.h>
   9 #include <clk-uclass.h>
  10 #include <dm/device.h>
  11
  12 static int at91_slow_clk_enable(struct clk *clk)
  13 {
  14         return 0;
  15 }
  16
  17 static ulong at91_slow_clk_get_rate(struct clk *clk)
  18 {
  19         return CONFIG_SYS_AT91_SLOW_CLOCK;
  20 }
  21
  22 static struct clk_ops at91_slow_clk_ops = {
  23         .enable = at91_slow_clk_enable,
  24         .get_rate = at91_slow_clk_get_rate,
  25 };
  26
  27 static const struct udevice_id at91_slow_clk_match[] = {
  28         { .compatible = "atmel,at91sam9x5-clk-slow" },
  29         {}
  30 };
  31
  32 U_BOOT_DRIVER(at91_slow_clk) = {
  33         .name = "at91-slow-clk",
  34         .id = UCLASS_CLK,
  35         .of_match = at91_slow_clk_match,
  36         .ops = &at91_slow_clk_ops,
  37 };