diff options
Diffstat (limited to 'drivers/rtc')
| -rw-r--r-- | drivers/rtc/rtc-sa1100.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/rtc/rtc-sa1100.c b/drivers/rtc/rtc-sa1100.c index 0a36c7ee3b4..962510cf726 100644 --- a/drivers/rtc/rtc-sa1100.c +++ b/drivers/rtc/rtc-sa1100.c @@ -23,6 +23,7 @@ #include <linux/platform_device.h> #include <linux/module.h> +#include <linux/clk.h> #include <linux/rtc.h> #include <linux/init.h> #include <linux/fs.h> @@ -48,6 +49,7 @@ struct sa1100_rtc { int irq_1hz; int irq_alarm; struct rtc_device *rtc; + struct clk *clk; }; static irqreturn_t sa1100_rtc_interrupt(int irq, void *dev_id) @@ -104,6 +106,9 @@ static int sa1100_rtc_open(struct device *dev) struct rtc_device *rtc = info->rtc; int ret; + ret = clk_prepare_enable(info->clk); + if (ret) + goto fail_clk; ret = request_irq(info->irq_1hz, sa1100_rtc_interrupt, IRQF_DISABLED, "rtc 1Hz", dev); if (ret) { @@ -124,6 +129,8 @@ static int sa1100_rtc_open(struct device *dev) fail_ai: free_irq(info->irq_1hz, dev); fail_ui: + clk_disable_unprepare(info->clk); + fail_clk: return ret; } @@ -137,6 +144,7 @@ static void sa1100_rtc_release(struct device *dev) free_irq(info->irq_alarm, dev); free_irq(info->irq_1hz, dev); + clk_disable_unprepare(info->clk); } static int sa1100_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled) @@ -234,6 +242,12 @@ static int sa1100_rtc_probe(struct platform_device *pdev) info = kzalloc(sizeof(struct sa1100_rtc), GFP_KERNEL); if (!info) return -ENOMEM; + info->clk = clk_get(&pdev->dev, NULL); + if (IS_ERR(info->clk)) { + dev_err(&pdev->dev, "failed to find rtc clock source\n"); + ret = PTR_ERR(info->clk); + goto err_clk; + } info->irq_1hz = irq_1hz; info->irq_alarm = irq_alarm; spin_lock_init(&info->lock); @@ -292,6 +306,8 @@ static int sa1100_rtc_probe(struct platform_device *pdev) return 0; err_dev: platform_set_drvdata(pdev, NULL); + clk_put(info->clk); +err_clk: kfree(info); return ret; } @@ -302,6 +318,7 @@ static int sa1100_rtc_remove(struct platform_device *pdev) if (info) { rtc_device_unregister(info->rtc); + clk_put(info->clk); platform_set_drvdata(pdev, NULL); kfree(info); } |