/* * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #include <linux/clk.h> #include <linux/device.h> #include <linux/export.h> #include <linux/gfp.h> static void devm_clk_release(struct device *dev, void *res) { clk_put(*(struct clk **)res); } struct clk *devm_clk_get(struct device *dev, const char *id) { struct clk **ptr, *clk; ptr = devres_alloc(devm_clk_release, sizeof(*ptr), GFP_KERNEL); if (!ptr) return ERR_PTR(-ENOMEM); clk = clk_get(dev, id); if (!IS_ERR(clk)) { *ptr = clk; devres_add(dev, ptr); } else { devres_free(ptr); } return clk; } EXPORT_SYMBOL(devm_clk_get); struct clk_bulk_devres { struct clk_bulk_data *clks; int num_clks; }; static void devm_clk_bulk_release(struct device *dev, void *res) { struct clk_bulk_devres *devres = res; clk_bulk_put(devres->num_clks, devres->clks); } int __must_check devm_clk_bulk_get(struct device *dev, int num_clks, struct clk_bulk_data *clks) { struct clk_bulk_devres *devres; int ret; devres = devres_alloc(devm_clk_bulk_release, sizeof(*devres), GFP_KERNEL); if (!devres) return -ENOMEM; ret = clk_bulk_get(dev, num_clks, clks); if (!ret) { devres->clks = clks; devres->num_clks = num_clks; devres_add(dev, devres); } else { devres_free(devres); } return ret; } EXPORT_SYMBOL_GPL(devm_clk_bulk_get); static int devm_clk_match(struct device *dev, void *res, void *data) { struct clk **c = res; if (!c || !*c) { WARN_ON(!c || !*c); return 0; } return *c == data; } void devm_clk_put(struct device *dev, struct clk *clk) { int ret; ret = devres_release(dev, devm_clk_release, devm_clk_match, clk); WARN_ON(ret); } EXPORT_SYMBOL(devm_clk_put); struct clk *devm_get_clk_from_child(struct device *dev, struct device_node *np, const char *con_id) { struct clk **ptr, *clk; ptr = devres_alloc(devm_clk_release, sizeof(*ptr), GFP_KERNEL); if (!ptr) return ERR_PTR(-ENOMEM); clk = of_clk_get_by_name(np, con_id); if (!IS_ERR(clk)) { *ptr = clk; devres_add(dev, ptr); } else { devres_free(ptr); } return clk; } EXPORT_SYMBOL(devm_get_clk_from_child);