drivers/clk/meson/meson-eeclk.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright (c) 2019 BayLibre, SAS.
   4  * Author: Jerome Brunet <jbrunet@baylibre.com>
   5  */
   6
   7 #include <linux/clk-provider.h>
   8 #include <linux/of_device.h>
   9 #include <linux/platform_device.h>
  10 #include <linux/mfd/syscon.h>
  11 #include <linux/regmap.h>
  12
  13 #include "clk-regmap.h"
  14 #include "meson-eeclk.h"
  15
  16 int meson_eeclkc_probe(struct platform_device *pdev)
  17 {
  18         const struct meson_eeclkc_data *data;
  19         struct device *dev = &pdev->dev;
  20         struct regmap *map;
  21         int ret, i;
  22
  23         data = of_device_get_match_data(dev);
  24         if (!data)
  25                 return -EINVAL;
  26
  27         /* Get the hhi system controller node */
  28         map = syscon_node_to_regmap(of_get_parent(dev->of_node));
  29         if (IS_ERR(map)) {
  30                 dev_err(dev,
  31                         "failed to get HHI regmap\n");
  32                 return PTR_ERR(map);
  33         }
  34
  35         if (data->init_count)
  36                 regmap_multi_reg_write(map, data->init_regs, data->init_count);
  37
  38         /* Populate regmap for the regmap backed clocks */
  39         for (i = 0; i < data->regmap_clk_num; i++)
  40                 data->regmap_clks[i]->map = map;
  41
  42         for (i = 0; i < data->hw_onecell_data->num; i++) {
  43                 /* array might be sparse */
  44                 if (!data->hw_onecell_data->hws[i])
  45                         continue;
  46
  47                 ret = devm_clk_hw_register(dev, data->hw_onecell_data->hws[i]);
  48                 if (ret) {
  49                         dev_err(dev, "Clock registration failed\n");
  50                         return ret;
  51                 }
  52         }
  53
  54         return devm_of_clk_add_hw_provider(dev, of_clk_hw_onecell_get,
  55                                            data->hw_onecell_data);
  56 }