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[v3,0/3] tty: serial: samsung: Serial fixes for Apple A7-A11 SoCs

Message ID 20240908090939.2745-1-towinchenmi@gmail.com
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Series tty: serial: samsung: Serial fixes for Apple A7-A11 SoCs | expand

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Nick Chan Sept. 8, 2024, 9:05 a.m. UTC 
Hi,

This series fixes issues with serial on A7-A11 SoCs. The changes do not
seem to affect existing M1 and up users so they can be applied
unconditionally.

Firstly, these SoCs require 32-bit writes on the serial port. This only
manifested in earlycon as reg-io-width in device tree is consulted for
normal serial writes.

Secondly, A7-A9 SoCs seems to use different bits for RXTO and RXTO
enable. Accessing these bits in addition to the original RXTO and RXTO
enable bits will allow serial rx to work correctly on those SoCs.

Changes in v3:
  - v2 did not declare itself as v2 in subject line... resend as v3.

Changes in v2:
  - Mention A7-A11 in the comment about changing register accesses to
    MMIO32.

  - Use BIT() macro for new entries, and change the existing APPLE_S5L_*
    entries for consistency.

v1: https://lore.kernel.org/linux-samsung-soc/20240907111431.2970-1-towinchenmi@gmail.com
v2: https://lore.kernel.org/linux-samsung-soc/20240908075904.12133-1-towinchenmi@gmail.com

Nick Chan

---

Nick Chan (3):
  tty: serial: samsung: Use BIT() macro for APPLE_S5L_*
  tty: serial: samsung: Fix A7-A11 serial earlycon SError
  tty: serial: samsung: Fix serial rx on Apple A7-A9

 drivers/tty/serial/samsung_tty.c | 22 ++++++++++++++++------
 include/linux/serial_s3c.h       | 24 ++++++++++++++----------
 2 files changed, 30 insertions(+), 16 deletions(-)


base-commit: 9aaeb87ce1e966169a57f53a02ba05b30880ffb8