drivers: lpspi: patch for errata ERR050456

[manuargue]

LPSPI in S32K3X4 is affected by errata ERR050456 as described in S32K3X4-0P55A-1P55A-ERRATA document.

The user can reset the transmit FIFO using LPSPIn_CR[RTF] bit and can reset the receive FIFO using LPSPIn_CR[RRF]. However, resetting the FIFO using CR[RTF] and CR[RRF] does not clear the FIFO pointers completely. Workaround this by resetting resetting the entire module using LPSPIn_CR[RST] bit.

Prerequisites

• [x] I have checked latest main branch and the issue still exists.
• [x] I did not see it is stated as known-issue in release notes.
• [x] No similar GitHub issue is related to this change.
• [x] My code follows the commit guidelines of this project.
• [x] I have performed a self-review of my own code.
• [x] My changes generate no new warnings.
• [ ] I have added tests that prove my fix is effective or that my feature works.

Describe the pull request NXP have introduced support for S32K3 SoCs to Zephyr RTOS (see https://github.com/zephyrproject-rtos/zephyr/pull/58332) and that port reuse existing Zephyr shim drivers -which are backed by MCUX SDK baremetal drivers- for the hardware blocks that are common between the S32K3 devices and other NXP devices.

LPSPI is one these reused drivers. S32K344 version currently supported in Zephyr boards, is affected by errata ERR050456 (LPSPI: Reset to fifo does not work as expected) as described in https://www.nxp.com/webapp/Download?colCode=S32K3X4-0P55A-1P55A-ERRATA. This patch implements the first workaround described in this document.

This feature is being used in https://github.com/zephyrproject-rtos/hal_nxp/pull/250/files#diff-6b55f3d19303119b783fb5e686289dab902cc3dc0a00759018cba330fc9447a0R92-R93

Type of change

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] This change requires a documentation update

Tests

• Test configuration (please complete the following information):
  • Hardware setting: NXP S32K344
  • Toolchain: Zephyr SDK 0.16.1
  • Test Tool preparation: NA
  • Any other dependencies: Zephyr RTOS
• Test executed Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce.
  • [ ] Build Test
  • [ ] Run Test

[manuargue]

cc @mmahadevan108 @dleach02

[mmahadevan108]

@mcuxsusan . The S32 team is reusing the SDK driver for the work they do in Zephyr. They have a hardware issue for which this workaround is needed. Can you please help review and integrate.