Signed-off-by: Philippe Reynes <tremyfr@xxxxxxxxx>
---
Documentation/devicetree/bindings/rtc/rtc-mxc.txt | 27 +++++++++++++++++++++
drivers/rtc/rtc-mxc.c | 22 ++++++++++++++++-
2 files changed, 48 insertions(+), 1 deletions(-)
create mode 100644 Documentation/devicetree/bindings/rtc/rtc-mxc.txt
diff --git a/Documentation/devicetree/bindings/rtc/rtc-mxc.txt b/Documentation/devicetree/bindings/rtc/rtc-mxc.txt
new file mode 100644
index 0000000..5505493
--- /dev/null
+++ b/Documentation/devicetree/bindings/rtc/rtc-mxc.txt
@@ -0,0 +1,27 @@
+* Real Time Clock of the i.MX SoCs
+
+RTC controller for the i.MX SoCs
+
+Required properties:
+- compatible: Should be "fsl,imx1-rtc" or "fsl,imx21-rtc".
+- reg: physical base address of the controller and length of memory mapped
+ region.
+- interrupts: IRQ line for the RTC.
+- clocks: should contain two entries:
+ * one for the input reference
+ * one for the the SoC RTC
+- clock-names: should contain:
+ * "rtc" for the input reference clock
+ * "ipg" for the SoC RTC clock
+
+Example:
+
+rtc@10007000 {
+ compatible = "fsl,imx21-rtc";
+ reg = <0x10007000 0x1000>;
+ interrupts = <22>;
+ clocks = <&clks IMX27_CLK_CKIL>,
+ <&clks IMX27_CLK_RTC_IPG_GATE>;
+ clock-names = "rtc, "ipg";
+ status = "disabled";
+};
diff --git a/drivers/rtc/rtc-mxc.c b/drivers/rtc/rtc-mxc.c
index e916a91..df6483d 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)
@@ -98,6 +100,15 @@ static 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 = &imx_rtc_devtype[IMX1_RTC] },
+ { .compatible = "fsl,imx21-rtc", .data = &imx_rtc_devtype[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;
@@ -362,12 +373,20 @@ 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) {
+ struct platform_device_id *id_entry;
+
+ id_entry = (struct platform_device_id *)of_id->data;
+ pdata->devtype = id_entry->driver_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);
@@ -481,6 +500,7 @@ 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,
--
1.7.4.4
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