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path: root/drivers/rtc/rtc-mxc.c
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Diffstat (limited to 'drivers/rtc/rtc-mxc.c')
-rw-r--r--drivers/rtc/rtc-mxc.c60
1 files changed, 46 insertions, 14 deletions
diff --git a/drivers/rtc/rtc-mxc.c b/drivers/rtc/rtc-mxc.c
index 5fc292c2d..7bd89d900 100644
--- a/drivers/rtc/rtc-mxc.c
+++ b/drivers/rtc/rtc-mxc.c
@@ -16,6 +16,8 @@
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/clk.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
#define RTC_INPUT_CLK_32768HZ (0x00 << 5)
#define RTC_INPUT_CLK_32000HZ (0x01 << 5)
@@ -79,7 +81,8 @@ struct rtc_plat_data {
struct rtc_device *rtc;
void __iomem *ioaddr;
int irq;
- struct clk *clk;
+ struct clk *clk_ref;
+ struct clk *clk_ipg;
struct rtc_time g_rtc_alarm;
enum imx_rtc_type devtype;
};
@@ -97,6 +100,15 @@ static const struct platform_device_id imx_rtc_devtype[] = {
};
MODULE_DEVICE_TABLE(platform, imx_rtc_devtype);
+#ifdef CONFIG_OF
+static const struct of_device_id imx_rtc_dt_ids[] = {
+ { .compatible = "fsl,imx1-rtc", .data = (const void *)IMX1_RTC },
+ { .compatible = "fsl,imx21-rtc", .data = (const void *)IMX21_RTC },
+ {}
+};
+MODULE_DEVICE_TABLE(of, imx_rtc_dt_ids);
+#endif
+
static inline int is_imx1_rtc(struct rtc_plat_data *data)
{
return data->devtype == IMX1_RTC;
@@ -361,29 +373,45 @@ static int mxc_rtc_probe(struct platform_device *pdev)
u32 reg;
unsigned long rate;
int ret;
+ const struct of_device_id *of_id;
pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
if (!pdata)
return -ENOMEM;
- pdata->devtype = pdev->id_entry->driver_data;
+ of_id = of_match_device(imx_rtc_dt_ids, &pdev->dev);
+ if (of_id)
+ pdata->devtype = (enum imx_rtc_type)of_id->data;
+ else
+ pdata->devtype = pdev->id_entry->driver_data;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
pdata->ioaddr = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(pdata->ioaddr))
return PTR_ERR(pdata->ioaddr);
- pdata->clk = devm_clk_get(&pdev->dev, NULL);
- if (IS_ERR(pdata->clk)) {
- dev_err(&pdev->dev, "unable to get clock!\n");
- return PTR_ERR(pdata->clk);
+ pdata->clk_ipg = devm_clk_get(&pdev->dev, "ipg");
+ if (IS_ERR(pdata->clk_ipg)) {
+ dev_err(&pdev->dev, "unable to get ipg clock!\n");
+ return PTR_ERR(pdata->clk_ipg);
}
- ret = clk_prepare_enable(pdata->clk);
+ ret = clk_prepare_enable(pdata->clk_ipg);
if (ret)
return ret;
- rate = clk_get_rate(pdata->clk);
+ pdata->clk_ref = devm_clk_get(&pdev->dev, "ref");
+ if (IS_ERR(pdata->clk_ref)) {
+ dev_err(&pdev->dev, "unable to get ref clock!\n");
+ ret = PTR_ERR(pdata->clk_ref);
+ goto exit_put_clk_ipg;
+ }
+
+ ret = clk_prepare_enable(pdata->clk_ref);
+ if (ret)
+ goto exit_put_clk_ipg;
+
+ rate = clk_get_rate(pdata->clk_ref);
if (rate == 32768)
reg = RTC_INPUT_CLK_32768HZ;
@@ -394,7 +422,7 @@ static int mxc_rtc_probe(struct platform_device *pdev)
else {
dev_err(&pdev->dev, "rtc clock is not valid (%lu)\n", rate);
ret = -EINVAL;
- goto exit_put_clk;
+ goto exit_put_clk_ref;
}
reg |= RTC_ENABLE_BIT;
@@ -402,7 +430,7 @@ static int mxc_rtc_probe(struct platform_device *pdev)
if (((readw(pdata->ioaddr + RTC_RTCCTL)) & RTC_ENABLE_BIT) == 0) {
dev_err(&pdev->dev, "hardware module can't be enabled!\n");
ret = -EIO;
- goto exit_put_clk;
+ goto exit_put_clk_ref;
}
platform_set_drvdata(pdev, pdata);
@@ -424,15 +452,17 @@ static int mxc_rtc_probe(struct platform_device *pdev)
THIS_MODULE);
if (IS_ERR(rtc)) {
ret = PTR_ERR(rtc);
- goto exit_put_clk;
+ goto exit_put_clk_ref;
}
pdata->rtc = rtc;
return 0;
-exit_put_clk:
- clk_disable_unprepare(pdata->clk);
+exit_put_clk_ref:
+ clk_disable_unprepare(pdata->clk_ref);
+exit_put_clk_ipg:
+ clk_disable_unprepare(pdata->clk_ipg);
return ret;
}
@@ -441,7 +471,8 @@ static int mxc_rtc_remove(struct platform_device *pdev)
{
struct rtc_plat_data *pdata = platform_get_drvdata(pdev);
- clk_disable_unprepare(pdata->clk);
+ clk_disable_unprepare(pdata->clk_ref);
+ clk_disable_unprepare(pdata->clk_ipg);
return 0;
}
@@ -473,6 +504,7 @@ static SIMPLE_DEV_PM_OPS(mxc_rtc_pm_ops, mxc_rtc_suspend, mxc_rtc_resume);
static struct platform_driver mxc_rtc_driver = {
.driver = {
.name = "mxc_rtc",
+ .of_match_table = of_match_ptr(imx_rtc_dt_ids),
.pm = &mxc_rtc_pm_ops,
},
.id_table = imx_rtc_devtype,