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
meson_eeclkc_probe(struct platform_device * pdev)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);
65