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authorLinus Torvalds <torvalds@linux-foundation.org>2012-05-29 18:27:19 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-05-29 18:27:19 -0700
commit7e5b2db77b05746613516599c916a8cc2e321077 (patch)
treec3ec333ff7b77bcc8e456a3a3d19bf20f5c651b8 /drivers/watchdog
parent227d1e4319ffd8729781941d92f4ae4d85beecd9 (diff)
parentc819baf31f5f91fbb06b2c93de2d5b8c8d096f3f (diff)
Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus
Pull MIPS updates from Ralf Baechle: "The whole series has been sitting in -next for quite a while with no complaints. The last change to the series was before the weekend the removal of an SPI patch which Grant - even though previously acked by himself - appeared to raise objections. So I removed it until the situation is clarified. Other than that all the patches have the acks from their respective maintainers, all MIPS and x86 defconfigs are building fine and I'm not aware of any problems introduced by this series. Among the key features for this patch series is a sizable patchset for Lantiq which among other things introduces support for Lantiq's flagship product, the FALCON SOC. It also means that the opensource developers behind this patchset have overtaken Lantiq's competing inhouse development team that was working behind closed doors. Less noteworthy the ath79 patchset which adds support for a few more chip variants, cleanups and fixes. Finally the usual dose of tweaking of generic code." Fix up trivial conflicts in arch/mips/lantiq/xway/gpio_{ebu,stp}.c where printk spelling fixes clashed with file move and eventual removal of the printk. * 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: (81 commits) MIPS: lantiq: remove orphaned code MIPS: Remove all -Wall and almost all -Werror usage from arch/mips. MIPS: lantiq: implement support for FALCON soc MTD: MIPS: lantiq: verify that the NOR interface is available on falcon soc MTD: MIPS: lantiq: implement OF support watchdog: MIPS: lantiq: implement OF support and minor fixes SERIAL: MIPS: lantiq: implement OF support GPIO: MIPS: lantiq: convert gpio-stp-xway to OF GPIO: MIPS: lantiq: convert gpio-mm-lantiq to OF and of_mm_gpio GPIO: MIPS: lantiq: move gpio-stp and gpio-ebu to the subsystem folder MIPS: pci: convert lantiq driver to OF MIPS: lantiq: convert dma to platform driver MIPS: lantiq: implement support for clkdev api MIPS: lantiq: drop ltq_gpio_request() and gpio_to_irq() OF: MIPS: lantiq: implement irq_domain support OF: MIPS: lantiq: implement OF support MIPS: lantiq: drop mips_machine support OF: PCI: const usage needed by MIPS MIPS: Cavium: Remove smp_reserve_lock. MIPS: Move cache setup to setup_arch(). ...
Diffstat (limited to 'drivers/watchdog')
-rw-r--r--drivers/watchdog/lantiq_wdt.c56
1 files changed, 25 insertions, 31 deletions
diff --git a/drivers/watchdog/lantiq_wdt.c b/drivers/watchdog/lantiq_wdt.c
index a9593a3a32a..2e74c3a8ee5 100644
--- a/drivers/watchdog/lantiq_wdt.c
+++ b/drivers/watchdog/lantiq_wdt.c
@@ -13,14 +13,15 @@
#include <linux/fs.h>
#include <linux/miscdevice.h>
#include <linux/watchdog.h>
-#include <linux/platform_device.h>
+#include <linux/of_platform.h>
#include <linux/uaccess.h>
#include <linux/clk.h>
#include <linux/io.h>
-#include <lantiq.h>
+#include <lantiq_soc.h>
-/* Section 3.4 of the datasheet
+/*
+ * Section 3.4 of the datasheet
* The password sequence protects the WDT control register from unintended
* write actions, which might cause malfunction of the WDT.
*
@@ -70,7 +71,8 @@ ltq_wdt_disable(void)
{
/* write the first password magic */
ltq_w32(LTQ_WDT_PW1, ltq_wdt_membase + LTQ_WDT_CR);
- /* write the second password magic with no config
+ /*
+ * write the second password magic with no config
* this turns the watchdog off
*/
ltq_w32(LTQ_WDT_PW2, ltq_wdt_membase + LTQ_WDT_CR);
@@ -184,7 +186,7 @@ static struct miscdevice ltq_wdt_miscdev = {
.fops = &ltq_wdt_fops,
};
-static int __init
+static int __devinit
ltq_wdt_probe(struct platform_device *pdev)
{
struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
@@ -194,28 +196,27 @@ ltq_wdt_probe(struct platform_device *pdev)
dev_err(&pdev->dev, "cannot obtain I/O memory region");
return -ENOENT;
}
- res = devm_request_mem_region(&pdev->dev, res->start,
- resource_size(res), dev_name(&pdev->dev));
- if (!res) {
- dev_err(&pdev->dev, "cannot request I/O memory region");
- return -EBUSY;
- }
- ltq_wdt_membase = devm_ioremap_nocache(&pdev->dev, res->start,
- resource_size(res));
+
+ ltq_wdt_membase = devm_request_and_ioremap(&pdev->dev, res);
if (!ltq_wdt_membase) {
dev_err(&pdev->dev, "cannot remap I/O memory region\n");
return -ENOMEM;
}
/* we do not need to enable the clock as it is always running */
- clk = clk_get(&pdev->dev, "io");
- WARN_ON(!clk);
+ clk = clk_get_io();
+ if (IS_ERR(clk)) {
+ dev_err(&pdev->dev, "Failed to get clock\n");
+ return -ENOENT;
+ }
ltq_io_region_clk_rate = clk_get_rate(clk);
clk_put(clk);
+ /* find out if the watchdog caused the last reboot */
if (ltq_reset_cause() == LTQ_RST_CAUSE_WDTRST)
ltq_wdt_bootstatus = WDIOF_CARDRESET;
+ dev_info(&pdev->dev, "Init done\n");
return misc_register(&ltq_wdt_miscdev);
}
@@ -227,33 +228,26 @@ ltq_wdt_remove(struct platform_device *pdev)
return 0;
}
+static const struct of_device_id ltq_wdt_match[] = {
+ { .compatible = "lantiq,wdt" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, ltq_wdt_match);
static struct platform_driver ltq_wdt_driver = {
+ .probe = ltq_wdt_probe,
.remove = __devexit_p(ltq_wdt_remove),
.driver = {
- .name = "ltq_wdt",
+ .name = "wdt",
.owner = THIS_MODULE,
+ .of_match_table = ltq_wdt_match,
},
};
-static int __init
-init_ltq_wdt(void)
-{
- return platform_driver_probe(&ltq_wdt_driver, ltq_wdt_probe);
-}
-
-static void __exit
-exit_ltq_wdt(void)
-{
- return platform_driver_unregister(&ltq_wdt_driver);
-}
-
-module_init(init_ltq_wdt);
-module_exit(exit_ltq_wdt);
+module_platform_driver(ltq_wdt_driver);
module_param(nowayout, bool, 0);
MODULE_PARM_DESC(nowayout, "Watchdog cannot be stopped once started");
-
MODULE_AUTHOR("John Crispin <blogic@openwrt.org>");
MODULE_DESCRIPTION("Lantiq SoC Watchdog");
MODULE_LICENSE("GPL");