Re: [PATCH] watchdog: imx2_wdt: adds big endianness support.

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On 05/29/2014 11:10 PM, Xiubo Li wrote:
This watchdog driver will be working on IMX2+, Vybrid, LS1, LS2+
platforms, and will be in different endianness mode in those SoCs:

SoCs         CPU endian mode      WDT endian mode
------------------------------------------------
IMX2+            LE                    LE
Vybird           LE                    LE
LS1              LE                    BE
LS2              LE                    LE

Signed-off-by: Xiubo Li <Li.Xiubo@xxxxxxxxxxxxx>
---
  drivers/watchdog/imx2_wdt.c | 7 +++++++
  1 file changed, 7 insertions(+)

diff --git a/drivers/watchdog/imx2_wdt.c b/drivers/watchdog/imx2_wdt.c
index 9d4874f..68c3d37 100644
--- a/drivers/watchdog/imx2_wdt.c
+++ b/drivers/watchdog/imx2_wdt.c
@@ -28,6 +28,7 @@
  #include <linux/kernel.h>
  #include <linux/module.h>
  #include <linux/moduleparam.h>
+#include <linux/of_address.h>
  #include <linux/platform_device.h>
  #include <linux/regmap.h>
  #include <linux/timer.h>
@@ -190,10 +191,12 @@ static struct regmap_config imx2_wdt_regmap_config = {

  static int __init imx2_wdt_probe(struct platform_device *pdev)
  {
+	struct device_node *np = pdev->dev.of_node;
  	struct imx2_wdt_device *wdev;
  	struct watchdog_device *wdog;
  	struct resource *res;
  	void __iomem *base;
+	bool big_endian;
  	int ret;
  	u32 val;

@@ -201,6 +204,10 @@ static int __init imx2_wdt_probe(struct platform_device *pdev)
  	if (!wdev)
  		return -ENOMEM;

+	big_endian = of_property_read_bool(np, "big-endian");
+	if (big_endian)
+		imx2_wdt_regmap_config.val_format_endian = REGMAP_ENDIAN_BIG;
+

You'll need to document the use of this property in
Documentation/devicetree/bindings/watchdog/fsl-imx-wdt.txt.

Guenter

  	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
  	base = devm_ioremap_resource(&pdev->dev, res);
  	if (IS_ERR(base))


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