Hi Simon, Magnus,
This patch series adds support for the external crystal feeding SCIF_CLK
to (H)SCIF on the various Renesas R-Car Gen1, Gen2, and Gen3 development
boards. This increases the range and accuracy of supported baud rates.
Support for this has been accepted in the driver in v4.5-rc1.
Changes compared to v3:
- Change one-line summary prefix to match current arm-soc practices,
- Tested on r8a7794/alt,
- Rebased,
Changes compared to v2:
- Add support for r8a7778/bockw, r8a7779/marzen, r8a7790/lager,
r8a7791/porter, r8a7793/gose, r8a7794/alt, and r8a7794/silk,
- Add Reviewed-by.
Testing:
- This was tested locally on r8a7791/koelsch and r8a7795/salvator-x,
- This was tested remotely on r8a7778/bockw, r8a7779/marzen, and
r8a7794/alt,
- This has been in renesas-drivers for a while, so I assume it has
received basic testing on other boards,
- Hints for various levels of testing:
- Change the "dev_dbg" after "done:" in
drivers/tty/serial/sh-sci.c to "dev_info" to print clock and bit
rate,
- "yes U | tr -d '\n' > /dev/ttySCx" outputs a square wave with a
frequency of half the bit rate on TXD,
- Modifying the frequency of SCIF_CLK causes garbage on the serial
console, unless you compensate by changing the bit rate in
/chosen/stdout-path,
- If you disable the SCIF_CLK, the brg_int clock will be used. If
you change that clock, you'll get garbage again.
Dependencies:
- renesas-devel-20160129-v4.5-rc1,
- series "[PATCH v4 0/7] ARM: dts: R-Car: Add SCIF fallback
compatibility strings",
- series "[PATCH v4 00/11] ARM: dts: shmobile: Rename the serial port
clock to fck",
- series "[PATCH v4 0/7] ARM: dts: r-car: Add BRG support for
(H)SCIF".
Thanks for applying!
Geert Uytterhoeven (9):
ARM: dts: alt: Enable SCIF_CLK frequency and pins
ARM: dts: bockw: Enable SCIF_CLK frequency and pins
ARM: dts: gose: Enable SCIF_CLK frequency and pins
ARM: dts: koelsch: Enable SCIF_CLK frequency and pins
ARM: dts: lager: Enable SCIF_CLK frequency and pins
ARM: dts: marzen: Enable SCIF_CLK frequency and pins
ARM: dts: porter: Enable SCIF_CLK frequency and pins
ARM: dts: silk: Enable SCIF_CLK frequency and pins
arm64: dts: salvator-x: Enable SCIF_CLK frequency and pins
arch/arm/boot/dts/r8a7778-bockw.dts | 13 +++++++++++++
arch/arm/boot/dts/r8a7779-marzen.dts | 13 +++++++++++++
arch/arm/boot/dts/r8a7790-lager.dts | 13 +++++++++++++
arch/arm/boot/dts/r8a7791-koelsch.dts | 13 +++++++++++++
arch/arm/boot/dts/r8a7791-porter.dts | 13 +++++++++++++
arch/arm/boot/dts/r8a7793-gose.dts | 13 +++++++++++++
arch/arm/boot/dts/r8a7794-alt.dts | 13 +++++++++++++
arch/arm/boot/dts/r8a7794-silk.dts | 13 +++++++++++++
arch/arm64/boot/dts/renesas/r8a7795-salvator-x.dts | 12 ++++++++++++
9 files changed, 116 insertions(+)
--
1.9.1
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
