The vdd_mpu regulator maximum voltage was previously limited to 1.2985V,
which prevented the CPU from reaching the 1GHz operating point. This
limitation was put in place because voltage changes were not working
correctly, causing the board to stall when attempting higher frequencies.
Increase the maximum voltage to 1.3515V to allow the full 1GHz OPP to be
used.

Add a TPS65219 PMIC driver fixes that properly implement the LOCK register
handling, to make voltage transitions work reliably.

Changes in v5:
- Add a error message.
- Link to v4: https://lore.kernel.org/r/20251112-fix_tps65219-v4-0-696a0f55d5d8@bootlin.com

Changes in v4:
- Move the registers unlock in the probe instead of a custom regmap write
  operation.
- Link to v3: https://lore.kernel.org/r/20251112-fix_tps65219-v3-0-e49bab4c01ce@bootlin.com

Changes in v3:
- Remove an unused variable
- Link to v2: https://lore.kernel.org/r/20251106-fix_tps65219-v2-0-a7d608c4272f@bootlin.com

Changes in v2:
- Setup a custom regmap_bus only for the TPS65214 instead of checking
  the chip_id every time reg_write is called.
- Add the am335x-bonegreen-eco devicetree change in the same patch
  series.

Signed-off-by: Kory Maincent (TI.com) <kory.maincent@bootlin.com>
---
Kory Maincent (TI.com) (2):
      mfd: tps65219: Implement LOCK register handling for TPS65214
      ARM: dts: am335x-bonegreen-eco: Enable 1GHz OPP by increasing vdd_mpu voltage

 arch/arm/boot/dts/ti/omap/am335x-bonegreen-eco.dts | 2 +-
 drivers/mfd/tps65219.c                             | 9 +++++++++
 include/linux/mfd/tps65219.h                       | 2 ++
 3 files changed, 12 insertions(+), 1 deletion(-)
---
base-commit: 2bb202416d33347102b12bbd1db4837fb6685617
change-id: 20251106-fix_tps65219-dd62141d22cf

Best regards,
-- 
Köry Maincent, Bootlin
Embedded Linux and kernel engineering
https://bootlin.com