diff options
Diffstat (limited to 'drivers/watchdog')
| -rw-r--r-- | drivers/watchdog/sp805_wdt.c | 40 |
1 files changed, 19 insertions, 21 deletions
diff --git a/drivers/watchdog/sp805_wdt.c b/drivers/watchdog/sp805_wdt.c index 58a00e1ab23b..531551216c8c 100644 --- a/drivers/watchdog/sp805_wdt.c +++ b/drivers/watchdog/sp805_wdt.c @@ -11,7 +11,6 @@ * warranty of any kind, whether express or implied. */ -#include <linux/acpi.h> #include <linux/device.h> #include <linux/resource.h> #include <linux/amba/bus.h> @@ -23,8 +22,8 @@ #include <linux/math64.h> #include <linux/module.h> #include <linux/moduleparam.h> -#include <linux/of.h> #include <linux/pm.h> +#include <linux/property.h> #include <linux/slab.h> #include <linux/spinlock.h> #include <linux/types.h> @@ -231,6 +230,7 @@ static int sp805_wdt_probe(struct amba_device *adev, const struct amba_id *id) { struct sp805_wdt *wdt; + u64 rate = 0; int ret = 0; wdt = devm_kzalloc(&adev->dev, sizeof(*wdt), GFP_KERNEL); @@ -243,25 +243,23 @@ sp805_wdt_probe(struct amba_device *adev, const struct amba_id *id) if (IS_ERR(wdt->base)) return PTR_ERR(wdt->base); - if (adev->dev.of_node) { - wdt->clk = devm_clk_get(&adev->dev, NULL); - if (IS_ERR(wdt->clk)) { - dev_err(&adev->dev, "Clock not found\n"); - return PTR_ERR(wdt->clk); - } - wdt->rate = clk_get_rate(wdt->clk); - } else if (has_acpi_companion(&adev->dev)) { - /* - * When Driver probe with ACPI device, clock devices - * are not available, so watchdog rate get from - * clock-frequency property given in _DSD object. - */ - device_property_read_u64(&adev->dev, "clock-frequency", - &wdt->rate); - if (!wdt->rate) { - dev_err(&adev->dev, "no clock-frequency property\n"); - return -ENODEV; - } + /* + * When driver probe with ACPI device, clock devices + * are not available, so watchdog rate get from + * clock-frequency property given in _DSD object. + */ + device_property_read_u64(&adev->dev, "clock-frequency", &rate); + + wdt->clk = devm_clk_get_optional(&adev->dev, NULL); + if (IS_ERR(wdt->clk)) + return dev_err_probe(&adev->dev, PTR_ERR(wdt->clk), "Clock not found\n"); + + wdt->rate = clk_get_rate(wdt->clk); + if (!wdt->rate) + wdt->rate = rate; + if (!wdt->rate) { + dev_err(&adev->dev, "no clock-frequency property\n"); + return -ENODEV; } wdt->adev = adev; |