diff options
Diffstat (limited to 'drivers/clk/clk-bulk.c')
| -rw-r--r-- | drivers/clk/clk-bulk.c | 108 |
1 files changed, 104 insertions, 4 deletions
diff --git a/drivers/clk/clk-bulk.c b/drivers/clk/clk-bulk.c index ddbe32f9c2..db775dc40b 100644 --- a/drivers/clk/clk-bulk.c +++ b/drivers/clk/clk-bulk.c @@ -1,4 +1,4 @@ -// SPDX-License-Identifier: GPL-2.0 +// SPDX-License-Identifier: GPL-2.0-only /* * Copyright 2017 NXP * @@ -23,8 +23,9 @@ void clk_bulk_put(int num_clks, struct clk_bulk_data *clks) } EXPORT_SYMBOL_GPL(clk_bulk_put); -int __must_check clk_bulk_get(struct device_d *dev, int num_clks, - struct clk_bulk_data *clks) +static int __clk_bulk_get(struct device *dev, int num_clks, + struct clk_bulk_data *clks, + bool optional) { int ret; int i; @@ -36,10 +37,15 @@ int __must_check clk_bulk_get(struct device_d *dev, int num_clks, clks[i].clk = clk_get(dev, clks[i].id); if (IS_ERR(clks[i].clk)) { ret = PTR_ERR(clks[i].clk); + clks[i].clk = NULL; + + if (ret == -ENOENT && optional) + continue; + if (ret != -EPROBE_DEFER) dev_err(dev, "Failed to get clk '%s': %d\n", clks[i].id, ret); - clks[i].clk = NULL; + goto err; } } @@ -51,8 +57,102 @@ err: return ret; } + +int __must_check clk_bulk_get(struct device *dev, int num_clks, + struct clk_bulk_data *clks) +{ + return __clk_bulk_get(dev, num_clks, clks, false); +} EXPORT_SYMBOL(clk_bulk_get); +int __must_check clk_bulk_get_optional(struct device *dev, int num_clks, + struct clk_bulk_data *clks) +{ + return __clk_bulk_get(dev, num_clks, clks, true); +} +EXPORT_SYMBOL(clk_bulk_get_optional); + +static int __must_check of_clk_bulk_get(struct device_node *np, int num_clks, + struct clk_bulk_data *clks) +{ + int ret; + int i; + + for (i = 0; i < num_clks; i++) { + clks[i].id = NULL; + clks[i].clk = NULL; + } + + for (i = 0; i < num_clks; i++) { + of_property_read_string_index(np, "clock-names", i, &clks[i].id); + clks[i].clk = of_clk_get(np, i); + if (IS_ERR(clks[i].clk)) { + ret = PTR_ERR(clks[i].clk); + if (ret != -EPROBE_DEFER) + pr_err("%s: Failed to get clk index: %d ret: %pe\n", + np->name, i, clks[i].clk); + clks[i].clk = NULL; + goto err; + } + } + + return 0; + +err: + clk_bulk_put(i, clks); + + return ret; +} + +static int __must_check of_clk_bulk_get_all(struct device_node *np, + struct clk_bulk_data **clks) +{ + struct clk_bulk_data *clk_bulk; + int num_clks; + int ret; + + num_clks = of_clk_get_parent_count(np); + if (!num_clks) + return 0; + + clk_bulk = kmalloc_array(num_clks, sizeof(*clk_bulk), GFP_KERNEL); + if (!clk_bulk) + return -ENOMEM; + + ret = of_clk_bulk_get(np, num_clks, clk_bulk); + if (ret) { + kfree(clk_bulk); + return ret; + } + + *clks = clk_bulk; + + return num_clks; +} + +void clk_bulk_put_all(int num_clks, struct clk_bulk_data *clks) +{ + if (IS_ERR_OR_NULL(clks)) + return; + + clk_bulk_put(num_clks, clks); + + kfree(clks); +} +EXPORT_SYMBOL(clk_bulk_put_all); + +int __must_check clk_bulk_get_all(struct device *dev, + struct clk_bulk_data **clks) +{ + struct device_node *np = dev->of_node; + + if (!np) + return 0; + + return of_clk_bulk_get_all(np, clks); +} +EXPORT_SYMBOL(clk_bulk_get_all); + /** * clk_bulk_disable - gate a set of clocks * @num_clks: the number of clk_bulk_data |