| // SPDX-License-Identifier: GPL-2.0+ |
| // |
| // OWL common clock driver |
| // |
| // Copyright (c) 2014 Actions Semi Inc. |
| // Author: David Liu <liuwei@actions-semi.com> |
| // |
| // Copyright (c) 2018 Linaro Ltd. |
| // Author: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> |
| |
| #include <linux/of_address.h> |
| #include <linux/of_platform.h> |
| #include <linux/platform_device.h> |
| #include <linux/regmap.h> |
| |
| #include "owl-common.h" |
| |
| static const struct regmap_config owl_regmap_config = { |
| .reg_bits = 32, |
| .reg_stride = 4, |
| .val_bits = 32, |
| .max_register = 0x00cc, |
| .fast_io = true, |
| }; |
| |
| static void owl_clk_set_regmap(const struct owl_clk_desc *desc, |
| struct regmap *regmap) |
| { |
| int i; |
| struct owl_clk_common *clks; |
| |
| for (i = 0; i < desc->num_clks; i++) { |
| clks = desc->clks[i]; |
| if (!clks) |
| continue; |
| |
| clks->regmap = regmap; |
| } |
| } |
| |
| int owl_clk_regmap_init(struct platform_device *pdev, |
| struct owl_clk_desc *desc) |
| { |
| void __iomem *base; |
| struct regmap *regmap; |
| struct resource *res; |
| |
| res = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
| base = devm_ioremap_resource(&pdev->dev, res); |
| if (IS_ERR(base)) |
| return PTR_ERR(base); |
| |
| regmap = devm_regmap_init_mmio(&pdev->dev, base, &owl_regmap_config); |
| if (IS_ERR(regmap)) { |
| pr_err("failed to init regmap\n"); |
| return PTR_ERR(regmap); |
| } |
| |
| owl_clk_set_regmap(desc, regmap); |
| desc->regmap = regmap; |
| |
| return 0; |
| } |
| |
| int owl_clk_probe(struct device *dev, struct clk_hw_onecell_data *hw_clks) |
| { |
| int i, ret; |
| struct clk_hw *hw; |
| |
| for (i = 0; i < hw_clks->num; i++) { |
| |
| hw = hw_clks->hws[i]; |
| |
| if (IS_ERR_OR_NULL(hw)) |
| continue; |
| |
| ret = devm_clk_hw_register(dev, hw); |
| if (ret) { |
| dev_err(dev, "Couldn't register clock %d - %s\n", |
| i, hw->init->name); |
| return ret; |
| } |
| } |
| |
| ret = devm_of_clk_add_hw_provider(dev, of_clk_hw_onecell_get, hw_clks); |
| if (ret) |
| dev_err(dev, "Failed to add clock provider\n"); |
| |
| return ret; |
| } |