In some situations the GSC firmware where the EEPROM containing the
model and DRAM configuration may not be ready by the time the SoC
is ready to talk to it over I2C.
Instead of a hard delay, poll the I2C lines to wait until they are
released to avoid the I2C drivers 'Arbitation lost' error message.
Signed-off-by: Tim Harvey <tharvey@gateworks.com>
Reviewed-by: Fabio Estevam <festevam@denx.de>
Use the common GSC driver.
This allows us to do some additional cleanup:
- rename gsc{.c,.h} to eeprom{.c.h} for clarity
- collapse eeprom_get_dev
- remove unnecessary header files and alphabatize includes
Signed-off-by: Tim Harvey <tharvey@gateworks.com>
The GW7902 is based on the i.MX 8M Mini / Nano SoC featuring:
- LPDDR4 DRAM
- eMMC FLASH
- Gateworks System Controller
- LTE CAT M1 modem
- USB 2.0 HUB
- M.2 Socket with USB2.0, PCIe, and dual-SIM
- IMX8M FEC
- PCIe based GbE
- RS232/RS485/RS422 serial transceiver
- GPS
- CAN bus
- WiFi / Bluetooth
- MIPI header (DSI/CSI/GPIO/PWM/I2S)
- PMIC
To add support for the i.MX8M Nano GW7902:
- Add imx8mn-venice dts/defconfig/include
- Add imx8mn-gw7902 dts
- Add imx8mn-2gb lpddr4 dram configs
- Add misc support for IMX8M Nano SoC
- rename imx8mm-venice.c to venice.c as it is no longer imx8mm specific
- update README with differences for IMX8MN vs IMX8MM
Signed-off-by: Tim Harvey <tharvey@gateworks.com>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
