[PATCH v3 0/5] Renesas SCI fixes

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RZ/G2UL SMARC EVK has sci pins exposed through PMOD1 interface.
On testing, found that irq handler, tx and rx is broken.

This series fixes these issues.

 * Cced stable@xxxxxxxxxxxxxxx
 * Added Rx, Tx and Tx end interrupt handler patch.
 * Replaced the wrong fixes tag
 * Added a simpler check in sci_init_single() and added a check in
   probe to catch invalid interrupt count.
Tested the SCI0 interface on RZ/G2UL by connecting to PMOD USBUART.
 39:          0     GICv3 437 Level     1004d000.serial:rx err
 40:         12     GICv3 438 Edge      1004d000.serial:rx full
 41:         70     GICv3 439 Edge      1004d000.serial:tx empty
 42:         18     GICv3 440 Level     1004d000.serial:tx end

Overlay compilation:
Enable CONFIG_OF_OVERLAY in defconfig

cpp -nostdinc -I include -I arch -undef -x assembler-with-cpp \
  arch/arm64/boot//dts/renesas/r9a07g043u11-smarc.dts \

dtc -@ -i include/ -I dts -O dtb -o arch/arm64/boot/dts/renesas/r9a07g043u11-smarc.dtb   r9a07g043u11-smarc.dts.tmp

cpp -nostdinc -I include -I arch -undef -x assembler-with-cpp \
  arch/arm64/boot/dts/renesas/r9a07g043-smarc.dtso \

dtc -@ -i include/ -I dts -O dtb -o arch/arm64/boot/dts/renesas/r9a07g043-smarc.dtbo   r9a07g043-smarc.dtso.tmp

Applying overlay:
apply_overlay=tftp 0x48000000 RZ-G2UL/r9a07g043u11-smarc.dtb;fdt addr 0x48000000;fdt resize 8192;tftp 0x4A000000 RZ-G2UL/r9a07g043-smarc.dtbo;fdt apply 0x4A000000
bootcmd-overlay=run apply_overlay;tftp 0x48080000 RZ-G2UL/Image;booti 0x48080000 - 0x48000000

Biju Das (5):
  tty: serial: sh-sci: Fix transmit end interrupt handler
  tty: serial: sh-sci: Fix Rx on RZ/G2L SCI
  tty: serial: sh-sci: Fix Tx on SCI IP
  tty: serial: sh-sci: Add support for tx end interrupt handling
  arm64: dts: renesas: r9a07g044: Enable sci0 nodes using dt overlay

 arch/arm64/boot/dts/renesas/Makefile          |  1 +
 .../boot/dts/renesas/r9a07g043-smarc.dtso     | 45 ++++++++++++
 drivers/tty/serial/sh-sci.c                   | 72 +++++++++++++++++--
 drivers/tty/serial/sh-sci.h                   |  3 +
 4 files changed, 115 insertions(+), 6 deletions(-)
 create mode 100644 arch/arm64/boot/dts/renesas/r9a07g043-smarc.dtso


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