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-input.h" 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 clk_hw *input; 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 map = syscon_node_to_regmap(of_get_parent(dev->of_node)); 31 if (IS_ERR(map)) { 32 dev_err(dev, 33 "failed to get HHI regmap\n"); 34 return PTR_ERR(map); 35 } 36 37 input = meson_clk_hw_register_input(dev, "xtal", IN_PREFIX "xtal", 0); 38 if (IS_ERR(input)) { 39 ret = PTR_ERR(input); 40 if (ret != -EPROBE_DEFER) 41 dev_err(dev, "failed to get input clock"); 42 return ret; 43 } 44 45 /* Populate regmap for the regmap backed clocks */ 46 for (i = 0; i < data->regmap_clk_num; i++) 47 data->regmap_clks[i]->map = map; 48 49 for (i = 0; i < data->hw_onecell_data->num; i++) { 50 /* array might be sparse */ 51 if (!data->hw_onecell_data->hws[i]) 52 continue; 53 54 ret = devm_clk_hw_register(dev, data->hw_onecell_data->hws[i]); 55 if (ret) { 56 dev_err(dev, "Clock registration failed\n"); 57 return ret; 58 } 59 } 60 61 return devm_of_clk_add_hw_provider(dev, of_clk_hw_onecell_get, 62 data->hw_onecell_data); 63 } 64