[imx9 boot reason 4/4] Use PMIC registers to store bootmode information #886
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jlaitine
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Signed-off-by: Tero Salminen <[email protected]>
Signed-off-by: Tero Salminen <[email protected]>
WDOG_B pin is unused in current HW design. Related configuration bits (WDOG_B_CFG) from PMIC RESET_CTRL register are borrowed for stay in bootloader boot reason delivery. -stay in bootloader: WDOG_B_CFG value 11b -boot normally: PMIC register power on value Signed-off-by: Tero Salminen <[email protected]>
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PMIC WDOG_B pin is unused in current HW design.
Related configuration bits (WDOG_B_CFG) from PMIC RESET_CTRL register are borrowed for bootmode reason delivery.
boot normally: register has power on value
stay in bootloader: WDOG_B_CFG 11b
NOTE: I've observed the device goes occasionally to NXP flash / serial download mode after sending cold reset request to PMIC. The reason is unknown.
Corresponding bootloader functionality is needed for the complete functionality.
The full set of PRs: