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.h>
   9 #include <linux/platform_device.h>
  10 #include <linux/mfd/syscon.h>
  11 #include <linux/regmap.h>
  12 #include <linux/module.h>
  13
  14 #include "clk-regmap.h"
  15 #include "meson-eeclk.h"
  16
  17 int meson_eeclkc_probe(struct platform_device *pdev)
  18 {
  19         const struct meson_eeclkc_data *data;
  20         struct device *dev = &pdev->dev;
  21         struct device_node *np;
  22         struct regmap *map;
  23         int ret, i;
  24
  25         data = of_device_get_match_data(dev);
  26         if (!data)
  27                 return -EINVAL;
  28
  29         /* Get the hhi system controller node */
  30         np = of_get_parent(dev->of_node);
  31         map = syscon_node_to_regmap(np);
  32         of_node_put(np);
  33         if (IS_ERR(map)) {
  34                 dev_err(dev,
  35                         "failed to get HHI regmap\n");
  36                 return PTR_ERR(map);
  37         }
  38
  39         if (data->init_count)
  40                 regmap_multi_reg_write(map, data->init_regs, data->init_count);
  41
  42         /* Populate regmap for the regmap backed clocks */
  43         for (i = 0; i < data->regmap_clk_num; i++)
  44                 data->regmap_clks[i]->map = map;
  45
  46         for (i = 0; i < data->hw_clks.num; i++) {
  47                 /* array might be sparse */
  48                 if (!data->hw_clks.hws[i])
  49                         continue;
  50
  51                 ret = devm_clk_hw_register(dev, data->hw_clks.hws[i]);
  52                 if (ret) {
  53                         dev_err(dev, "Clock registration failed\n");
  54                         return ret;
  55                 }
  56         }
  57
  58         return devm_of_clk_add_hw_provider(dev, meson_clk_hw_get, (void *)&data->hw_clks);
  59 }
  60 EXPORT_SYMBOL_NS_GPL(meson_eeclkc_probe, CLK_MESON);
  61
  62 MODULE_DESCRIPTION("Amlogic Main Clock Controller Helpers");
  63 MODULE_LICENSE("GPL");
  64 MODULE_IMPORT_NS(CLK_MESON);