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| author | Xiubo Li <Li.Xiubo@freescale.com> | 2014-06-03 10:45:14 +0800 |
|---|---|---|
| committer | Wim Van Sebroeck <wim@iguana.be> | 2014-08-05 22:43:11 +0200 |
| commit | f728f4bfc495a588abda4661c09595112677be25 (patch) | |
| tree | 40d1b38ae81dd8a979d44eef44508883cb8d3bdc | |
| parent | 2cdf25bb574c20efde0340ffa90f08d1609ef97c (diff) | |
| download | linux-f728f4bfc495a588abda4661c09595112677be25.tar.gz linux-f728f4bfc495a588abda4661c09595112677be25.tar.bz2 linux-f728f4bfc495a588abda4661c09595112677be25.zip | |
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: Xiubo Li <Li.Xiubo@freescale.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
| -rw-r--r-- | Documentation/devicetree/bindings/watchdog/fsl-imx-wdt.txt | 5 | ||||
| -rw-r--r-- | drivers/watchdog/imx2_wdt.c | 7 |
2 files changed, 12 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/watchdog/fsl-imx-wdt.txt b/Documentation/devicetree/bindings/watchdog/fsl-imx-wdt.txt index 2144af1a5264..e52ba2da868c 100644 --- a/Documentation/devicetree/bindings/watchdog/fsl-imx-wdt.txt +++ b/Documentation/devicetree/bindings/watchdog/fsl-imx-wdt.txt @@ -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; }; diff --git a/drivers/watchdog/imx2_wdt.c b/drivers/watchdog/imx2_wdt.c index 9d4874f09948..68c3d379ffa8 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; + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); base = devm_ioremap_resource(&pdev->dev, res); if (IS_ERR(base)) |