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drivers: watchdog: Adding watchdog support for sam SOC

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Adding watchdog driver for sam SoC. The current implemntation just
diables the watchdog on device boot.
This PR adds the following support for SAM3X, SAM4S and SAME70
1. Activate processor reset
2. Activate all reset
3. Generate interrupt on watchdog timer expiration.

Signed-off-by: Subramanian Meenakshi Sundaram <subbu147@gmail.com>
Signed-off-by: Kumar Gala <kumar.gala@linaro.org>
This commit is contained in:
Subramanian Meenakshi Sundaram 2018-10-24 22:16:25 -07:00 • committed by Maureen Helm
commit 4e1179bba5
16 changed files with 294 additions and 29 deletions
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9
dts/arm/atmel/sam3x.dtsi
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@ -32,6 +32,15 @@
};
soc {
wdog: watchdog@400E1A50 {
compatible = "atmel,sam-watchdog";
reg = <0x400E1A50 0xc>;
interrupts = <4 0>;
peripheral-id = <4>;
label = "WATCHDOG_0";
status = "disabled";
};
i2c0: i2c@4008C000 {
compatible = "atmel,sam-i2c-twi";
clock-frequency = <I2C_BITRATE_STANDARD>;