clk/meson/meson-eeclk.c

0001 // SPDX-License-Identifier: GPL-2.0
0002 /*
0003  * Copyright (c) 2019 BayLibre, SAS.
0004  * Author: Jerome Brunet <jbrunet@baylibre.com>
0005  */
0006
0007 #include <linux/clk-provider.h>
0008 #include <linux/of_device.h>
0009 #include <linux/platform_device.h>
0010 #include <linux/mfd/syscon.h>
0011 #include <linux/regmap.h>
0012 #include <linux/module.h>
0013
0014 #include "clk-regmap.h"
0015 #include "meson-eeclk.h"
0016
0017 int meson_eeclkc_probe(struct platform_device *pdev)
0018 {
0019     const struct meson_eeclkc_data *data;
0020     struct device *dev = &pdev->dev;
0021     struct regmap *map;
0022     int ret, i;
0023
0024     data = of_device_get_match_data(dev);
0025     if (!data)
0026         return -EINVAL;
0027
0028     /* Get the hhi system controller node */
0029     map = syscon_node_to_regmap(of_get_parent(dev->of_node));
0030     if (IS_ERR(map)) {
0031         dev_err(dev,
0032             "failed to get HHI regmap\n");
0033         return PTR_ERR(map);
0034     }
0035
0036     if (data->init_count)
0037         regmap_multi_reg_write(map, data->init_regs, data->init_count);
0038
0039     /* Populate regmap for the regmap backed clocks */
0040     for (i = 0; i < data->regmap_clk_num; i++)
0041         data->regmap_clks[i]->map = map;
0042
0043     for (i = 0; i < data->hw_onecell_data->num; i++) {
0044         /* array might be sparse */
0045         if (!data->hw_onecell_data->hws[i])
0046             continue;
0047
0048         ret = devm_clk_hw_register(dev, data->hw_onecell_data->hws[i]);
0049         if (ret) {
0050             dev_err(dev, "Clock registration failed\n");
0051             return ret;
0052         }
0053     }
0054
0055     return devm_of_clk_add_hw_provider(dev, of_clk_hw_onecell_get,
0056                        data->hw_onecell_data);
0057 }
0058 EXPORT_SYMBOL_GPL(meson_eeclkc_probe);
0059 MODULE_LICENSE("GPL v2");