diff options
Diffstat (limited to 'drivers/watchdog/pic32-dmt.c')
| -rw-r--r-- | drivers/watchdog/pic32-dmt.c | 56 |
1 files changed, 21 insertions, 35 deletions
diff --git a/drivers/watchdog/pic32-dmt.c b/drivers/watchdog/pic32-dmt.c index c797305f8338..4f2aca78f13a 100644 --- a/drivers/watchdog/pic32-dmt.c +++ b/drivers/watchdog/pic32-dmt.c @@ -1,13 +1,9 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* * PIC32 deadman timer driver * * Purna Chandra Mandal <purna.mandal@microchip.com> * Copyright (c) 2016, Microchip Technology Inc. - * - * 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/clk.h> #include <linux/device.h> @@ -168,70 +164,61 @@ static struct watchdog_device pic32_dmt_wdd = { .ops = &pic32_dmt_fops, }; +static void pic32_clk_disable_unprepare(void *data) +{ + clk_disable_unprepare(data); +} + static int pic32_dmt_probe(struct platform_device *pdev) { + struct device *dev = &pdev->dev; int ret; struct pic32_dmt *dmt; - struct resource *mem; struct watchdog_device *wdd = &pic32_dmt_wdd; - dmt = devm_kzalloc(&pdev->dev, sizeof(*dmt), GFP_KERNEL); + dmt = devm_kzalloc(dev, sizeof(*dmt), GFP_KERNEL); if (!dmt) return -ENOMEM; - mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); - dmt->regs = devm_ioremap_resource(&pdev->dev, mem); + dmt->regs = devm_platform_ioremap_resource(pdev, 0); if (IS_ERR(dmt->regs)) return PTR_ERR(dmt->regs); - dmt->clk = devm_clk_get(&pdev->dev, NULL); + dmt->clk = devm_clk_get(dev, NULL); if (IS_ERR(dmt->clk)) { - dev_err(&pdev->dev, "clk not found\n"); + dev_err(dev, "clk not found\n"); return PTR_ERR(dmt->clk); } ret = clk_prepare_enable(dmt->clk); if (ret) return ret; + ret = devm_add_action_or_reset(dev, pic32_clk_disable_unprepare, + dmt->clk); + if (ret) + return ret; wdd->timeout = pic32_dmt_get_timeout_secs(dmt); if (!wdd->timeout) { - dev_err(&pdev->dev, - "failed to read watchdog register timeout\n"); - ret = -EINVAL; - goto out_disable_clk; + dev_err(dev, "failed to read watchdog register timeout\n"); + return -EINVAL; } - dev_info(&pdev->dev, "timeout %d\n", wdd->timeout); + dev_info(dev, "timeout %d\n", wdd->timeout); wdd->bootstatus = pic32_dmt_bootstatus(dmt) ? WDIOF_CARDRESET : 0; watchdog_set_nowayout(wdd, WATCHDOG_NOWAYOUT); watchdog_set_drvdata(wdd, dmt); - ret = watchdog_register_device(wdd); + ret = devm_watchdog_register_device(dev, wdd); if (ret) { - dev_err(&pdev->dev, "watchdog register failed, err %d\n", ret); - goto out_disable_clk; + dev_err(dev, "watchdog register failed, err %d\n", ret); + return ret; } platform_set_drvdata(pdev, wdd); return 0; - -out_disable_clk: - clk_disable_unprepare(dmt->clk); - return ret; -} - -static int pic32_dmt_remove(struct platform_device *pdev) -{ - struct watchdog_device *wdd = platform_get_drvdata(pdev); - struct pic32_dmt *dmt = watchdog_get_drvdata(wdd); - - watchdog_unregister_device(wdd); - clk_disable_unprepare(dmt->clk); - - return 0; } static const struct of_device_id pic32_dmt_of_ids[] = { @@ -242,7 +229,6 @@ MODULE_DEVICE_TABLE(of, pic32_dmt_of_ids); static struct platform_driver pic32_dmt_driver = { .probe = pic32_dmt_probe, - .remove = pic32_dmt_remove, .driver = { .name = "pic32-dmt", .of_match_table = of_match_ptr(pic32_dmt_of_ids), |