LXR uboot/drivers/clk/imx/clk-imx8.c

   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 * Copyright 2018 NXP
   4 * Peng Fan <peng.fan@nxp.com>
   5 */
   6
   7#include <common.h>
   8#include <clk-uclass.h>
   9#include <dm.h>
  10#include <asm/arch/sci/sci.h>
  11#include <asm/arch/clock.h>
  12#include <dt-bindings/clock/imx8qxp-clock.h>
  13#include <dt-bindings/soc/imx_rsrc.h>
  14#include <misc.h>
  15
  16#include "clk-imx8.h"
  17
  18__weak ulong imx8_clk_get_rate(struct clk *clk)
  19{
  20        return 0;
  21}
  22
  23__weak ulong imx8_clk_set_rate(struct clk *clk, unsigned long rate)
  24{
  25        return 0;
  26}
  27
  28__weak int __imx8_clk_enable(struct clk *clk, bool enable)
  29{
  30        return -ENOTSUPP;
  31}
  32
  33static int imx8_clk_disable(struct clk *clk)
  34{
  35        return __imx8_clk_enable(clk, 0);
  36}
  37
  38static int imx8_clk_enable(struct clk *clk)
  39{
  40        return __imx8_clk_enable(clk, 1);
  41}
  42
  43#if CONFIG_IS_ENABLED(CMD_CLK)
  44int soc_clk_dump(void)
  45{
  46        struct udevice *dev;
  47        struct clk clk;
  48        unsigned long rate;
  49        int i, ret;
  50
  51        ret = uclass_get_device_by_driver(UCLASS_CLK,
  52                                          DM_GET_DRIVER(imx8_clk), &dev);
  53        if (ret)
  54                return ret;
  55
  56        printf("Clk\t\tHz\n");
  57
  58        for (i = 0; i < num_clks; i++) {
  59                clk.id = imx8_clk_names[i].id;
  60                ret = clk_request(dev, &clk);
  61                if (ret < 0) {
  62                        debug("%s clk_request() failed: %d\n", __func__, ret);
  63                        continue;
  64                }
  65
  66                ret = clk_get_rate(&clk);
  67                rate = ret;
  68
  69                clk_free(&clk);
  70
  71                if (ret == -ENOTSUPP) {
  72                        printf("clk ID %lu not supported yet\n",
  73                               imx8_clk_names[i].id);
  74                        continue;
  75                }
  76                if (ret < 0) {
  77                        printf("%s %lu: get_rate err: %d\n",
  78                               __func__, imx8_clk_names[i].id, ret);
  79                        continue;
  80                }
  81
  82                printf("%s(%3lu):\t%lu\n",
  83                       imx8_clk_names[i].name, imx8_clk_names[i].id, rate);
  84        }
  85
  86        return 0;
  87}
  88#endif
  89
  90static struct clk_ops imx8_clk_ops = {
  91        .set_rate = imx8_clk_set_rate,
  92        .get_rate = imx8_clk_get_rate,
  93        .enable = imx8_clk_enable,
  94        .disable = imx8_clk_disable,
  95};
  96
  97static int imx8_clk_probe(struct udevice *dev)
  98{
  99        return 0;
 100}
 101
 102static const struct udevice_id imx8_clk_ids[] = {
 103        { .compatible = "fsl,imx8qxp-clk" },
 104        { .compatible = "fsl,imx8qm-clk" },
 105        { },
 106};
 107
 108U_BOOT_DRIVER(imx8_clk) = {
 109        .name = "clk_imx8",
 110        .id = UCLASS_CLK,
 111        .of_match = imx8_clk_ids,
 112        .ops = &imx8_clk_ops,
 113        .probe = imx8_clk_probe,
 114        .flags = DM_FLAG_PRE_RELOC,
 115};
 116