diff options
author | 2016-04-11 10:41:07 +0300 | |
---|---|---|
committer | 2016-04-13 08:17:18 +0300 | |
commit | e09b41010ba33a20a87472ee821fa407a5b8da36 (patch) | |
tree | d10dc367189862e7ca5c592f033dc3726e1df4e3 /kernel/drivers/watchdog/at91sam9_wdt.c | |
parent | f93b97fd65072de626c074dbe099a1fff05ce060 (diff) |
These changes are the raw update to linux-4.4.6-rt14. Kernel sources
are taken from kernel.org, and rt patch from the rt wiki download page.
During the rebasing, the following patch collided:
Force tick interrupt and get rid of softirq magic(I70131fb85).
Collisions have been removed because its logic was found on the
source already.
Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769
Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>
Diffstat (limited to 'kernel/drivers/watchdog/at91sam9_wdt.c')
-rw-r--r-- | kernel/drivers/watchdog/at91sam9_wdt.c | 26 |
1 files changed, 22 insertions, 4 deletions
diff --git a/kernel/drivers/watchdog/at91sam9_wdt.c b/kernel/drivers/watchdog/at91sam9_wdt.c index 1443b3c39..7e6acaf3e 100644 --- a/kernel/drivers/watchdog/at91sam9_wdt.c +++ b/kernel/drivers/watchdog/at91sam9_wdt.c @@ -17,6 +17,7 @@ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt +#include <linux/clk.h> #include <linux/errno.h> #include <linux/init.h> #include <linux/interrupt.h> @@ -40,9 +41,9 @@ #define DRV_NAME "AT91SAM9 Watchdog" #define wdt_read(wdt, field) \ - __raw_readl((wdt)->base + (field)) + readl_relaxed((wdt)->base + (field)) #define wdt_write(wtd, field, val) \ - __raw_writel((val), (wdt)->base + (field)) + writel_relaxed((val), (wdt)->base + (field)) /* AT91SAM9 watchdog runs a 12bit counter @ 256Hz, * use this to convert a watchdog @@ -90,6 +91,7 @@ struct at91wdt { unsigned long heartbeat; /* WDT heartbeat in jiffies */ bool nowayout; unsigned int irq; + struct clk *sclk; }; /* ......................................................................... */ @@ -352,15 +354,25 @@ static int __init at91wdt_probe(struct platform_device *pdev) if (IS_ERR(wdt->base)) return PTR_ERR(wdt->base); + wdt->sclk = devm_clk_get(&pdev->dev, NULL); + if (IS_ERR(wdt->sclk)) + return PTR_ERR(wdt->sclk); + + err = clk_prepare_enable(wdt->sclk); + if (err) { + dev_err(&pdev->dev, "Could not enable slow clock\n"); + return err; + } + if (pdev->dev.of_node) { err = of_at91wdt_init(pdev->dev.of_node, wdt); if (err) - return err; + goto err_clk; } err = at91_wdt_init(pdev, wdt); if (err) - return err; + goto err_clk; platform_set_drvdata(pdev, wdt); @@ -368,6 +380,11 @@ static int __init at91wdt_probe(struct platform_device *pdev) wdt->wdd.timeout, wdt->nowayout); return 0; + +err_clk: + clk_disable_unprepare(wdt->sclk); + + return err; } static int __exit at91wdt_remove(struct platform_device *pdev) @@ -377,6 +394,7 @@ static int __exit at91wdt_remove(struct platform_device *pdev) pr_warn("I quit now, hardware will probably reboot!\n"); del_timer(&wdt->timer); + clk_disable_unprepare(wdt->sclk); return 0; } |