diff options
Diffstat (limited to 'drivers/char/hw_random/nomadik-rng.c')
| -rw-r--r-- | drivers/char/hw_random/nomadik-rng.c | 47 |
1 files changed, 13 insertions, 34 deletions
diff --git a/drivers/char/hw_random/nomadik-rng.c b/drivers/char/hw_random/nomadik-rng.c index 232b87fb5fc9..f2a2aa7a531c 100644 --- a/drivers/char/hw_random/nomadik-rng.c +++ b/drivers/char/hw_random/nomadik-rng.c @@ -1,16 +1,11 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * Nomadik RNG support * Copyright 2009 Alessandro Rubini - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. */ #include <linux/kernel.h> #include <linux/module.h> -#include <linux/init.h> #include <linux/device.h> #include <linux/amba/bus.h> #include <linux/hw_random.h> @@ -18,8 +13,6 @@ #include <linux/clk.h> #include <linux/err.h> -static struct clk *rng_clk; - static int nmk_rng_read(struct hwrng *rng, void *data, size_t max, bool wait) { void __iomem *base = (void __iomem *)rng->priv; @@ -41,53 +34,39 @@ static struct hwrng nmk_rng = { static int nmk_rng_probe(struct amba_device *dev, const struct amba_id *id) { + struct clk *rng_clk; void __iomem *base; int ret; - rng_clk = clk_get(&dev->dev, NULL); - if (IS_ERR(rng_clk)) { - dev_err(&dev->dev, "could not get rng clock\n"); - ret = PTR_ERR(rng_clk); - return ret; - } - - clk_prepare_enable(rng_clk); + rng_clk = devm_clk_get_enabled(&dev->dev, NULL); + if (IS_ERR(rng_clk)) + return dev_err_probe(&dev->dev, PTR_ERR(rng_clk), "could not get rng clock\n"); ret = amba_request_regions(dev, dev->dev.init_name); if (ret) - goto out_clk; + return ret; ret = -ENOMEM; - base = ioremap(dev->res.start, resource_size(&dev->res)); + base = devm_ioremap(&dev->dev, dev->res.start, + resource_size(&dev->res)); if (!base) goto out_release; nmk_rng.priv = (unsigned long)base; - ret = hwrng_register(&nmk_rng); + ret = devm_hwrng_register(&dev->dev, &nmk_rng); if (ret) - goto out_unmap; + goto out_release; return 0; -out_unmap: - iounmap(base); out_release: amba_release_regions(dev); -out_clk: - clk_disable(rng_clk); - clk_put(rng_clk); return ret; } -static int nmk_rng_remove(struct amba_device *dev) +static void nmk_rng_remove(struct amba_device *dev) { - void __iomem *base = (void __iomem *)nmk_rng.priv; - hwrng_unregister(&nmk_rng); - iounmap(base); amba_release_regions(dev); - clk_disable(rng_clk); - clk_put(rng_clk); - return 0; } -static struct amba_id nmk_rng_ids[] = { +static const struct amba_id nmk_rng_ids[] = { { .id = 0x000805e1, .mask = 0x000fffff, /* top bits are rev and cfg: accept all */ @@ -99,7 +78,6 @@ MODULE_DEVICE_TABLE(amba, nmk_rng_ids); static struct amba_driver nmk_rng_driver = { .drv = { - .owner = THIS_MODULE, .name = "rng", }, .probe = nmk_rng_probe, @@ -109,4 +87,5 @@ static struct amba_driver nmk_rng_driver = { module_amba_driver(nmk_rng_driver); +MODULE_DESCRIPTION("ST-Ericsson Nomadik Random Number Generator"); MODULE_LICENSE("GPL"); |