diff options
Diffstat (limited to 'drivers/char/hw_random/pasemi-rng.c')
| -rw-r--r-- | drivers/char/hw_random/pasemi-rng.c | 59 |
1 files changed, 11 insertions, 48 deletions
diff --git a/drivers/char/hw_random/pasemi-rng.c b/drivers/char/hw_random/pasemi-rng.c index c6df5b29af08..6959d6edd44c 100644 --- a/drivers/char/hw_random/pasemi-rng.c +++ b/drivers/char/hw_random/pasemi-rng.c @@ -1,31 +1,19 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (C) 2006-2007 PA Semi, Inc * * Maintained by: Olof Johansson <olof@lixom.net> * * Driver for the PWRficient onchip rng - * - * 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. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include <linux/module.h> #include <linux/kernel.h> +#include <linux/mod_devicetable.h> #include <linux/platform_device.h> #include <linux/hw_random.h> #include <linux/delay.h> -#include <linux/of_platform.h> -#include <asm/io.h> +#include <linux/io.h> #define SDCRNG_CTL_REG 0x00 #define SDCRNG_CTL_FVLD_M 0x0000f000 @@ -94,58 +82,33 @@ static struct hwrng pasemi_rng = { .data_read = pasemi_rng_data_read, }; -static int rng_probe(struct platform_device *ofdev) +static int rng_probe(struct platform_device *pdev) { void __iomem *rng_regs; - struct device_node *rng_np = ofdev->dev.of_node; - struct resource res; - int err = 0; - - err = of_address_to_resource(rng_np, 0, &res); - if (err) - return -ENODEV; - rng_regs = ioremap(res.start, 0x100); - - if (!rng_regs) - return -ENOMEM; + rng_regs = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(rng_regs)) + return PTR_ERR(rng_regs); pasemi_rng.priv = (unsigned long)rng_regs; - printk(KERN_INFO "Registering PA Semi RNG\n"); - - err = hwrng_register(&pasemi_rng); - - if (err) - iounmap(rng_regs); - - return err; -} - -static int rng_remove(struct platform_device *dev) -{ - void __iomem *rng_regs = (void __iomem *)pasemi_rng.priv; - - hwrng_unregister(&pasemi_rng); - iounmap(rng_regs); - - return 0; + pr_info("Registering PA Semi RNG\n"); + return devm_hwrng_register(&pdev->dev, &pasemi_rng); } -static struct of_device_id rng_match[] = { +static const struct of_device_id rng_match[] = { { .compatible = "1682m-rng", }, { .compatible = "pasemi,pwrficient-rng", }, { }, }; +MODULE_DEVICE_TABLE(of, rng_match); static struct platform_driver rng_driver = { .driver = { .name = "pasemi-rng", - .owner = THIS_MODULE, .of_match_table = rng_match, }, .probe = rng_probe, - .remove = rng_remove, }; module_platform_driver(rng_driver); |