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Commit f728f4bf authored by Xiubo Li's avatar Xiubo Li Committed by Wim Van Sebroeck
Browse files

watchdog: imx2_wdt: adds big endianness support. 



This watchdog driver will be working on IMX2+, Vybrid, LS1, LS2+
platforms, and will be in different endianness mode in those SoCs:

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

Signed-off-by: default avatarXiubo Li <Li.Xiubo@freescale.com>
Reviewed-by: default avatarGuenter Roeck <linux@roeck-us.net>
Signed-off-by: default avatarWim Van Sebroeck <wim@iguana.be>
parent 2cdf25bb

Documentation/devicetree/bindings/watchdog/fsl-imx-wdt.txt

+5 −0
Original line number Diff line number Diff line
@@ -5,10 +5,15 @@ Required properties: 
- reg : Should contain WDT registers location and length

- interrupts : Should contain WDT interrupt



Optional property:

- big-endian: If present the watchdog device's registers are implemented

  in big endian mode, otherwise in little mode.



Examples:



wdt@73f98000 {

	compatible = "fsl,imx51-wdt", "fsl,imx21-wdt";

	reg = <0x73f98000 0x4000>;

	interrupts = <58>;

	big-endian;

};

drivers/watchdog/imx2_wdt.c

+7 −0
Original line number Diff line number Diff line
@@ -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;



	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);

	base = devm_ioremap_resource(&pdev->dev, res);

	if (IS_ERR(base))