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watchdog: f71808e_wdt: refactor to platform device/driver pair
Driver so far wasn't ported to the driver model and registered the watchdog device out of the init after probing the I/O ports for a watchdog with correct vendor and device revision. Keep the device detection part at init time, but move watchdog registration to a platform driver probe function. Suggested-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Link: https://lore.kernel.org/r/9e1088839662e5c357286cab0b9de0bb0602e4fd.1628525954.git-series.a.fatoum@pengutronix.de Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
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parent
8bea27edc3
commit
27e0fe00a5
1 changed files with 42 additions and 7 deletions
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@ -13,6 +13,7 @@
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#include <linux/io.h>
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#include <linux/ioport.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/watchdog.h>
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#define DRVNAME "f71808e_wdt"
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@ -431,10 +432,19 @@ static const struct watchdog_ops fintek_wdt_ops = {
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.set_timeout = fintek_wdt_set_timeout,
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};
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static int __init watchdog_init(int sioaddr)
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static int fintek_wdt_probe(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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struct watchdog_device *wdd;
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int wdt_conf, err = 0;
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struct resource *res;
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int sioaddr;
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res = platform_get_resource(pdev, IORESOURCE_IO, 0);
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if (!res)
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return -ENXIO;
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sioaddr = res->start;
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watchdog.sioaddr = sioaddr;
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watchdog.ident.options = WDIOF_SETTIMEOUT
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@ -467,6 +477,7 @@ static int __init watchdog_init(int sioaddr)
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superio_exit(sioaddr);
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wdd->parent = dev;
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wdd->info = &watchdog.ident;
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wdd->ops = &fintek_wdt_ops;
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wdd->min_timeout = 1;
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@ -491,16 +502,16 @@ static int __init watchdog_init(int sioaddr)
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if (start_withtimeout) {
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err = fintek_wdt_start(wdd);
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if (err) {
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pr_err("cannot start watchdog timer\n");
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dev_err(dev, "cannot start watchdog timer\n");
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return err;
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}
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set_bit(WDOG_HW_RUNNING, &wdd->status);
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pr_info("watchdog started with initial timeout of %u sec\n",
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start_withtimeout);
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dev_info(dev, "watchdog started with initial timeout of %u sec\n",
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start_withtimeout);
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}
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return watchdog_register_device(wdd);
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return devm_watchdog_register_device(dev, wdd);
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}
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static int __init fintek_wdt_find(int sioaddr)
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@ -566,9 +577,19 @@ static int __init fintek_wdt_find(int sioaddr)
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return err;
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}
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static struct platform_driver fintek_wdt_driver = {
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.probe = fintek_wdt_probe,
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.driver = {
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.name = DRVNAME,
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},
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};
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static struct platform_device *fintek_wdt_pdev;
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static int __init fintek_wdt_init(void)
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{
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static const unsigned short addrs[] = { 0x2e, 0x4e };
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struct resource wdt_res = {};
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int err = -ENODEV;
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int i;
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@ -585,12 +606,26 @@ static int __init fintek_wdt_init(void)
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if (i == ARRAY_SIZE(addrs))
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return err;
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return watchdog_init(addrs[i]);
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platform_driver_register(&fintek_wdt_driver);
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wdt_res.name = "superio port";
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wdt_res.flags = IORESOURCE_IO;
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wdt_res.start = addrs[i];
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wdt_res.end = addrs[i] + 1;
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fintek_wdt_pdev = platform_device_register_simple(DRVNAME, -1, &wdt_res, 1);
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if (IS_ERR(fintek_wdt_pdev)) {
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platform_driver_unregister(&fintek_wdt_driver);
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return PTR_ERR(fintek_wdt_pdev);
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}
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return 0;
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}
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static void __exit fintek_wdt_exit(void)
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{
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watchdog_unregister_device(&watchdog.wdd);
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platform_device_unregister(fintek_wdt_pdev);
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platform_driver_unregister(&fintek_wdt_driver);
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}
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MODULE_DESCRIPTION("F71808E Watchdog Driver");
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