[Rebase to next-20151105 and re-sending work done by Tim Harvey] The IMX6 watchdog supports assertion of a signal (WDOG_B) which can be pinmux'd to an external pin. This is typically used for boards that have PMIC's in control of the IMX6 power rails. In fact, failure to use such an external reset on boards with external PMIC's can result in various hangs due to the IMX6 not being fully reset [1] as well as the board failing to reset because its PMIC has not been reset to provide adequate voltate for the CPU when comming out of reset at 800Mhz when it was at 400Mhz prior to reset. This adds a new device-tree property 'ext-reset-output' to fsl-imx-wdt in order to indicate the board has such a reset and to cause the watchdog to be configured to assert WDOG_B instead of an internal reset both on a watchdog timeout and in system_restart. The second patch adds the watchdog configuration and pinmux for Gateworks Ventana boards. [1] http://lists.infradead.org/pipermail/linux-arm-kernel/2015-March/333689.html Changes: v3->v4: - Rebase and test against linux-next tag next-20151105 History: v1: http://lists.infradead.org/pipermail/linux-arm-kernel/2015-May/347168.html v2: http://lists.infradead.org/pipermail/linux-arm-kernel/2015-June/348761.html v3: http://lists.infradead.org/pipermail/linux-arm-kernel/2015-July/360188.html Tim Harvey (2): watchdog: imx2_wdt: add external reset support via 'ext-reset-output' dt prop ARM: dts: ventana: Add ext-reset support .../devicetree/bindings/watchdog/fsl-imx-wdt.txt | 2 ++ arch/arm/boot/dts/imx6qdl-gw51xx.dtsi | 12 ++++++++++++ arch/arm/boot/dts/imx6qdl-gw52xx.dtsi | 12 ++++++++++++ arch/arm/boot/dts/imx6qdl-gw53xx.dtsi | 13 +++++++++++++ arch/arm/boot/dts/imx6qdl-gw54xx.dtsi | 17 +++++++++++++++++ arch/arm/boot/dts/imx6qdl-gw551x.dtsi | 12 ++++++++++++ arch/arm/boot/dts/imx6qdl-gw552x.dtsi | 12 ++++++++++++ drivers/watchdog/imx2_wdt.c | 20 ++++++++++++++++++-- 8 files changed, 98 insertions(+), 2 deletions(-) -- 2.6.2 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
