cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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meson-eeclk.c (1457B)

      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#include <linux/module.h>
     13
     14#include "clk-regmap.h"
     15#include "meson-eeclk.h"
     16
     17int meson_eeclkc_probe(struct platform_device *pdev)
     18{
     19	const struct meson_eeclkc_data *data;
     20	struct device *dev = &pdev->dev;
     21	struct regmap *map;
     22	int ret, i;
     23
     24	data = of_device_get_match_data(dev);
     25	if (!data)
     26		return -EINVAL;
     27
     28	/* Get the hhi system controller node */
     29	map = syscon_node_to_regmap(of_get_parent(dev->of_node));
     30	if (IS_ERR(map)) {
     31		dev_err(dev,
     32			"failed to get HHI regmap\n");
     33		return PTR_ERR(map);
     34	}
     35
     36	if (data->init_count)
     37		regmap_multi_reg_write(map, data->init_regs, data->init_count);
     38
     39	/* Populate regmap for the regmap backed clocks */
     40	for (i = 0; i < data->regmap_clk_num; i++)
     41		data->regmap_clks[i]->map = map;
     42
     43	for (i = 0; i < data->hw_onecell_data->num; i++) {
     44		/* array might be sparse */
     45		if (!data->hw_onecell_data->hws[i])
     46			continue;
     47
     48		ret = devm_clk_hw_register(dev, data->hw_onecell_data->hws[i]);
     49		if (ret) {
     50			dev_err(dev, "Clock registration failed\n");
     51			return ret;
     52		}
     53	}
     54
     55	return devm_of_clk_add_hw_provider(dev, of_clk_hw_onecell_get,
     56					   data->hw_onecell_data);
     57}
     58EXPORT_SYMBOL_GPL(meson_eeclkc_probe);
     59MODULE_LICENSE("GPL v2");