13495e295SManivannan Sadhasivam // SPDX-License-Identifier: GPL-2.0+
23495e295SManivannan Sadhasivam //
33495e295SManivannan Sadhasivam // OWL common clock driver
43495e295SManivannan Sadhasivam //
53495e295SManivannan Sadhasivam // Copyright (c) 2014 Actions Semi Inc.
63495e295SManivannan Sadhasivam // Author: David Liu <liuwei@actions-semi.com>
73495e295SManivannan Sadhasivam //
83495e295SManivannan Sadhasivam // Copyright (c) 2018 Linaro Ltd.
93495e295SManivannan Sadhasivam // Author: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
103495e295SManivannan Sadhasivam
113495e295SManivannan Sadhasivam #include <linux/platform_device.h>
123495e295SManivannan Sadhasivam #include <linux/regmap.h>
133495e295SManivannan Sadhasivam
143495e295SManivannan Sadhasivam #include "owl-common.h"
153495e295SManivannan Sadhasivam
163495e295SManivannan Sadhasivam static const struct regmap_config owl_regmap_config = {
173495e295SManivannan Sadhasivam .reg_bits = 32,
183495e295SManivannan Sadhasivam .reg_stride = 4,
193495e295SManivannan Sadhasivam .val_bits = 32,
203495e295SManivannan Sadhasivam .max_register = 0x00cc,
213495e295SManivannan Sadhasivam .fast_io = true,
223495e295SManivannan Sadhasivam };
233495e295SManivannan Sadhasivam
owl_clk_set_regmap(const struct owl_clk_desc * desc,struct regmap * regmap)243495e295SManivannan Sadhasivam static void owl_clk_set_regmap(const struct owl_clk_desc *desc,
253495e295SManivannan Sadhasivam struct regmap *regmap)
263495e295SManivannan Sadhasivam {
273495e295SManivannan Sadhasivam int i;
283495e295SManivannan Sadhasivam struct owl_clk_common *clks;
293495e295SManivannan Sadhasivam
303495e295SManivannan Sadhasivam for (i = 0; i < desc->num_clks; i++) {
313495e295SManivannan Sadhasivam clks = desc->clks[i];
323495e295SManivannan Sadhasivam if (!clks)
333495e295SManivannan Sadhasivam continue;
343495e295SManivannan Sadhasivam
353495e295SManivannan Sadhasivam clks->regmap = regmap;
363495e295SManivannan Sadhasivam }
373495e295SManivannan Sadhasivam }
383495e295SManivannan Sadhasivam
owl_clk_regmap_init(struct platform_device * pdev,struct owl_clk_desc * desc)393495e295SManivannan Sadhasivam int owl_clk_regmap_init(struct platform_device *pdev,
403a23eb72SManivannan Sadhasivam struct owl_clk_desc *desc)
413495e295SManivannan Sadhasivam {
423495e295SManivannan Sadhasivam void __iomem *base;
433495e295SManivannan Sadhasivam struct regmap *regmap;
443495e295SManivannan Sadhasivam
45*47b4ec0dSYangtao Li base = devm_platform_ioremap_resource(pdev, 0);
463495e295SManivannan Sadhasivam if (IS_ERR(base))
473495e295SManivannan Sadhasivam return PTR_ERR(base);
483495e295SManivannan Sadhasivam
493495e295SManivannan Sadhasivam regmap = devm_regmap_init_mmio(&pdev->dev, base, &owl_regmap_config);
503495e295SManivannan Sadhasivam if (IS_ERR(regmap)) {
513495e295SManivannan Sadhasivam pr_err("failed to init regmap\n");
523495e295SManivannan Sadhasivam return PTR_ERR(regmap);
533495e295SManivannan Sadhasivam }
543495e295SManivannan Sadhasivam
553495e295SManivannan Sadhasivam owl_clk_set_regmap(desc, regmap);
563a23eb72SManivannan Sadhasivam desc->regmap = regmap;
573495e295SManivannan Sadhasivam
583495e295SManivannan Sadhasivam return 0;
593495e295SManivannan Sadhasivam }
603495e295SManivannan Sadhasivam
owl_clk_probe(struct device * dev,struct clk_hw_onecell_data * hw_clks)613495e295SManivannan Sadhasivam int owl_clk_probe(struct device *dev, struct clk_hw_onecell_data *hw_clks)
623495e295SManivannan Sadhasivam {
633495e295SManivannan Sadhasivam int i, ret;
643495e295SManivannan Sadhasivam struct clk_hw *hw;
653495e295SManivannan Sadhasivam
663495e295SManivannan Sadhasivam for (i = 0; i < hw_clks->num; i++) {
67cf9ec1fcSStephen Boyd const char *name;
683495e295SManivannan Sadhasivam
693495e295SManivannan Sadhasivam hw = hw_clks->hws[i];
703495e295SManivannan Sadhasivam if (IS_ERR_OR_NULL(hw))
713495e295SManivannan Sadhasivam continue;
723495e295SManivannan Sadhasivam
73cf9ec1fcSStephen Boyd name = hw->init->name;
743495e295SManivannan Sadhasivam ret = devm_clk_hw_register(dev, hw);
753495e295SManivannan Sadhasivam if (ret) {
763495e295SManivannan Sadhasivam dev_err(dev, "Couldn't register clock %d - %s\n",
77cf9ec1fcSStephen Boyd i, name);
783495e295SManivannan Sadhasivam return ret;
793495e295SManivannan Sadhasivam }
803495e295SManivannan Sadhasivam }
813495e295SManivannan Sadhasivam
823495e295SManivannan Sadhasivam ret = devm_of_clk_add_hw_provider(dev, of_clk_hw_onecell_get, hw_clks);
833495e295SManivannan Sadhasivam if (ret)
843495e295SManivannan Sadhasivam dev_err(dev, "Failed to add clock provider\n");
853495e295SManivannan Sadhasivam
863495e295SManivannan Sadhasivam return ret;
873495e295SManivannan Sadhasivam }
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