On 06/14/2017 10:29 AM, Neil Armstrong wrote: > This patchset is a re-spin of Helmut Klein's v3 patchset at [0] and the v4 patchset at [1]. > > Initially, the original patchset was made to enable usage on the non-AO UARTS > not enabled by the Bootloader (uart_B and uart_C), but the patchset needed > an overall change to have clean and stable DT bindings. > > The Amlogic Meson UART Driver did not have stable DT bindings and mismatched > clock handling on non-AO UARTs since these "EE" UARTs needs a clock gate to > be ungated to works correctly. > In the same way, the AO UARTs does not need gating and can be used as > Early Consoles. > > In the same time, the UART Interfaces can take clock input for the baudrate > generate from either the external Xtal or the internal Bus Clock (clk81). > > So new bindings was necessary to meet these requirements and the DT > maintainers requirements. > > The "legacy" binding actually used in the driver is left until all the DT > files are switched to the new bindings. > > The GX DT has been tested, but the last 4 Meson6/Meson8/b are only > compile-tested, and testing is welcome. > Thus only the first 3 patches can be merged until the Meson6/Meson8/b are > formally tested. > > It must be noted that the meson6 cannot work today except using an early > console since the UART driver could not probe without a clocks property. > > Changes since v4 at [1]: > - Droped meson8/meson8b DT patches > - Fixes copy/paste error in patch 2 > - Refactored clock probing in patch 2 > - merged meson6 patches together to avoid breaking bisect > > [0] http://lkml.kernel.org/r/20170331165437.26227-1-hgkr.klein@xxxxxxxxx > [1] http://lkml.kernel.org/r/1497001756-942-1-git-send-email-narmstrong@xxxxxxxxxxxx > > Helmut Klein (3): > dt-bindings: serial: Add bindings for the Amlogic Meson UARTs > tty/serial: meson_uart: update to stable bindings > ARM64: dts: meson-gx: use stable UART bindings with correct gate clock > > Neil Armstrong (1): > ARM: dts: meson6: use stable UART bindings > > .../bindings/serial/amlogic,meson-uart.txt | 38 +++++++++ > arch/arm/boot/dts/meson.dtsi | 8 +- > arch/arm/boot/dts/meson6.dtsi | 28 +++++++ > arch/arm64/boot/dts/amlogic/meson-gx.dtsi | 12 ++- > arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi | 25 ++++++ > arch/arm64/boot/dts/amlogic/meson-gxl.dtsi | 25 ++++++ > drivers/tty/serial/meson_uart.c | 90 ++++++++++++++++++++-- > 7 files changed, 209 insertions(+), 17 deletions(-) > create mode 100644 Documentation/devicetree/bindings/serial/amlogic,meson-uart.txt > Hi Greg, Patches 3 & 4 will need a respin to avoid breaking compatibility with old kernel like the tty patch does by keeping the legacy compatible string. I will re-send then in a separate thread and Kevin will handle them. Patches 1 & 2 can be taken if they are OK for you. Thanks, Neil -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
