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158 lines
3.2 KiB
158 lines
3.2 KiB
// SPDX-License-Identifier: GPL-2.0 |
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#include <linux/clk.h> |
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#include <linux/device.h> |
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#include <linux/export.h> |
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#include <linux/gfp.h> |
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static void devm_clk_release(struct device *dev, void *res) |
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{ |
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clk_put(*(struct clk **)res); |
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} |
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struct clk *devm_clk_get(struct device *dev, const char *id) |
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{ |
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struct clk **ptr, *clk; |
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ptr = devres_alloc(devm_clk_release, sizeof(*ptr), GFP_KERNEL); |
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if (!ptr) |
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return ERR_PTR(-ENOMEM); |
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clk = clk_get(dev, id); |
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if (!IS_ERR(clk)) { |
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*ptr = clk; |
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devres_add(dev, ptr); |
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} else { |
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devres_free(ptr); |
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} |
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return clk; |
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} |
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EXPORT_SYMBOL(devm_clk_get); |
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struct clk *devm_clk_get_optional(struct device *dev, const char *id) |
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{ |
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struct clk *clk = devm_clk_get(dev, id); |
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if (clk == ERR_PTR(-ENOENT)) |
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return NULL; |
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return clk; |
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} |
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EXPORT_SYMBOL(devm_clk_get_optional); |
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struct clk_bulk_devres { |
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struct clk_bulk_data *clks; |
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int num_clks; |
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}; |
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static void devm_clk_bulk_release(struct device *dev, void *res) |
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{ |
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struct clk_bulk_devres *devres = res; |
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clk_bulk_put(devres->num_clks, devres->clks); |
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} |
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static int __devm_clk_bulk_get(struct device *dev, int num_clks, |
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struct clk_bulk_data *clks, bool optional) |
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{ |
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struct clk_bulk_devres *devres; |
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int ret; |
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devres = devres_alloc(devm_clk_bulk_release, |
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sizeof(*devres), GFP_KERNEL); |
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if (!devres) |
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return -ENOMEM; |
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if (optional) |
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ret = clk_bulk_get_optional(dev, num_clks, clks); |
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else |
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ret = clk_bulk_get(dev, num_clks, clks); |
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if (!ret) { |
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devres->clks = clks; |
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devres->num_clks = num_clks; |
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devres_add(dev, devres); |
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} else { |
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devres_free(devres); |
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} |
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return ret; |
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} |
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int __must_check devm_clk_bulk_get(struct device *dev, int num_clks, |
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struct clk_bulk_data *clks) |
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{ |
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return __devm_clk_bulk_get(dev, num_clks, clks, false); |
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} |
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EXPORT_SYMBOL_GPL(devm_clk_bulk_get); |
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int __must_check devm_clk_bulk_get_optional(struct device *dev, int num_clks, |
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struct clk_bulk_data *clks) |
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{ |
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return __devm_clk_bulk_get(dev, num_clks, clks, true); |
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} |
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EXPORT_SYMBOL_GPL(devm_clk_bulk_get_optional); |
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int __must_check devm_clk_bulk_get_all(struct device *dev, |
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struct clk_bulk_data **clks) |
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{ |
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struct clk_bulk_devres *devres; |
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int ret; |
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devres = devres_alloc(devm_clk_bulk_release, |
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sizeof(*devres), GFP_KERNEL); |
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if (!devres) |
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return -ENOMEM; |
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ret = clk_bulk_get_all(dev, &devres->clks); |
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if (ret > 0) { |
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*clks = devres->clks; |
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devres->num_clks = ret; |
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devres_add(dev, devres); |
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} else { |
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devres_free(devres); |
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} |
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return ret; |
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} |
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EXPORT_SYMBOL_GPL(devm_clk_bulk_get_all); |
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static int devm_clk_match(struct device *dev, void *res, void *data) |
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{ |
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struct clk **c = res; |
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if (!c || !*c) { |
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WARN_ON(!c || !*c); |
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return 0; |
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} |
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return *c == data; |
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} |
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void devm_clk_put(struct device *dev, struct clk *clk) |
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{ |
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int ret; |
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ret = devres_release(dev, devm_clk_release, devm_clk_match, clk); |
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WARN_ON(ret); |
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} |
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EXPORT_SYMBOL(devm_clk_put); |
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struct clk *devm_get_clk_from_child(struct device *dev, |
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struct device_node *np, const char *con_id) |
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{ |
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struct clk **ptr, *clk; |
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ptr = devres_alloc(devm_clk_release, sizeof(*ptr), GFP_KERNEL); |
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if (!ptr) |
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return ERR_PTR(-ENOMEM); |
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clk = of_clk_get_by_name(np, con_id); |
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if (!IS_ERR(clk)) { |
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*ptr = clk; |
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devres_add(dev, ptr); |
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} else { |
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devres_free(ptr); |
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} |
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return clk; |
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} |
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EXPORT_SYMBOL(devm_get_clk_from_child);
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