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