LXR uboot/drivers/clk/tegra/tegra186-clk.c

   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 * Copyright (c) 2016, NVIDIA CORPORATION.
   4 */
   5
   6#include <common.h>
   7#include <clk-uclass.h>
   8#include <dm.h>
   9#include <misc.h>
  10#include <asm/arch-tegra/bpmp_abi.h>
  11
  12static ulong tegra186_clk_get_rate(struct clk *clk)
  13{
  14        struct mrq_clk_request req;
  15        struct mrq_clk_response resp;
  16        int ret;
  17
  18        debug("%s(clk=%p) (dev=%p, id=%lu)\n", __func__, clk, clk->dev,
  19              clk->id);
  20
  21        req.cmd_and_id = (CMD_CLK_GET_RATE << 24) | clk->id;
  22
  23        ret = misc_call(clk->dev->parent, MRQ_CLK, &req, sizeof(req), &resp,
  24                        sizeof(resp));
  25        if (ret < 0)
  26                return ret;
  27
  28        return resp.clk_get_rate.rate;
  29}
  30
  31static ulong tegra186_clk_set_rate(struct clk *clk, ulong rate)
  32{
  33        struct mrq_clk_request req;
  34        struct mrq_clk_response resp;
  35        int ret;
  36
  37        debug("%s(clk=%p, rate=%lu) (dev=%p, id=%lu)\n", __func__, clk, rate,
  38              clk->dev, clk->id);
  39
  40        req.cmd_and_id = (CMD_CLK_SET_RATE << 24) | clk->id;
  41        req.clk_set_rate.rate = rate;
  42
  43        ret = misc_call(clk->dev->parent, MRQ_CLK, &req, sizeof(req), &resp,
  44                        sizeof(resp));
  45        if (ret < 0)
  46                return ret;
  47
  48        return resp.clk_set_rate.rate;
  49}
  50
  51static int tegra186_clk_en_dis(struct clk *clk,
  52                               enum mrq_reset_commands cmd)
  53{
  54        struct mrq_clk_request req;
  55        struct mrq_clk_response resp;
  56        int ret;
  57
  58        req.cmd_and_id = (cmd << 24) | clk->id;
  59
  60        ret = misc_call(clk->dev->parent, MRQ_CLK, &req, sizeof(req), &resp,
  61                        sizeof(resp));
  62        if (ret < 0)
  63                return ret;
  64
  65        return 0;
  66}
  67
  68static int tegra186_clk_enable(struct clk *clk)
  69{
  70        debug("%s(clk=%p) (dev=%p, id=%lu)\n", __func__, clk, clk->dev,
  71              clk->id);
  72
  73        return tegra186_clk_en_dis(clk, CMD_CLK_ENABLE);
  74}
  75
  76static int tegra186_clk_disable(struct clk *clk)
  77{
  78        debug("%s(clk=%p) (dev=%p, id=%lu)\n", __func__, clk, clk->dev,
  79              clk->id);
  80
  81        return tegra186_clk_en_dis(clk, CMD_CLK_DISABLE);
  82}
  83
  84static struct clk_ops tegra186_clk_ops = {
  85        .get_rate = tegra186_clk_get_rate,
  86        .set_rate = tegra186_clk_set_rate,
  87        .enable = tegra186_clk_enable,
  88        .disable = tegra186_clk_disable,
  89};
  90
  91static int tegra186_clk_probe(struct udevice *dev)
  92{
  93        debug("%s(dev=%p)\n", __func__, dev);
  94
  95        return 0;
  96}
  97
  98U_BOOT_DRIVER(tegra186_clk) = {
  99        .name           = "tegra186_clk",
 100        .id             = UCLASS_CLK,
 101        .probe          = tegra186_clk_probe,
 102        .ops = &tegra186_clk_ops,
 103};
 104