Add gpio hog support for board-specific gpio lines:
- put hogs in u-boot.dtsi so as to keep the regular dts files
in sync with the kernel. The hogs will not be put in the kernel
as that makes them un-usable by userspace as well as
re-initializes them to dt defaults overriding changes which may
have been done by bootloader commands.
- specify gpio names and initial config
- enable GPIO_HOG
Signed-off-by: Tim Harvey <tharvey@gateworks.com>
Acked-by: Peng Fan <peng.fan@nxp.com>
The GW7903 is based on the i.MX 8M Mini SoC featuring:
- LPDDR4 DRAM
- eMMC FLASH
- microSD socket with voltage select support
- Gateworks System Controller
- M.2 A-E Socket with USB2.0 and PCIe
- MiniPCIe Socket with PCIe, USB2.0, and SIM
- IMX8M FEC
- RS232/RS485/RS422 serial transceiver
- LIS2DE12 3-axis accelerometer
- front panel LED's
- off-board isolated digital I/O
- Wide range DC power input
- 802.3at PoE
- PMIC
Signed-off-by: Tim Harvey <tharvey@gateworks.com>
Reviewed-by: Fabio Estevam <festevam@denx.de>
