linux-kernel - [PATCH v3 0/4] tty/serial: meson_uart: add support for core clock handling

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Date:   Fri, 31 Mar 2017 18:54:33 +0200
From:   Helmut Klein <hgkr.klein@...il.com>
To:     unlisted-recipients:; (no To-header on input)
Cc:     Helmut Klein <hgkr.klein@...il.com>, linux-clk@...r.kernel.org,
        linux-serial@...r.kernel.org, linux-amlogic@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org
Subject: [PATCH v3 0/4] tty/serial: meson_uart: add support for core clock handling

To be able to use the three none AO uarts of the meson gx SoCs (uart_A,
uart_B & uart_C), the core clock has to be enabled (see chapter 22.3 of
the public s905 data sheet).
At least the u-boot of my s905 based media player (netxeon minimx-g)
doesn't do this. so the driver must enable the clock.

This patch set does:
- exposes the UART clock ids to the dtb
- adds documentation for the dt-bindings of meson_uart
- adds the core clock handling to the driver
- adds the core clock handling to meson-gxbb.dtsi and meson-gxl.dtsi

The patchset is based on the branch "master" of the repository in [1]

Changes since v2
- mail subjects reworked
- add clocks/clock-names to the documentation
- add core clock handling to meson-gxbb.dtsi & meson-gxl.dtsi

Changes since v1
- use git to produce the patch set
- added the clock ids for uart_B and uart_C

[1] git://git.kernel.org/pub/scm/linux/kernel/git/khilman/linux-amlogic.git

Helmut Klein (4):
  clk: meson: gxbb: expose CLKID_UARTx
  dt-bindings: meson_uart: add documentation for meson UARTs
  tty/serial: meson_uart: add the core clock handling to the driver
  ARM64: dts: meson-gx: add core clock support for uart_A, uart_B and
    uart_C

 .../bindings/serial/amlogic,meson_uart.txt         | 30 ++++++++++++++++++++++
 arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi        | 15 +++++++++++
 arch/arm64/boot/dts/amlogic/meson-gxl.dtsi         | 15 +++++++++++
 drivers/clk/meson/gxbb.h                           |  6 ++---
 drivers/tty/serial/meson_uart.c                    | 10 ++++++++
 include/dt-bindings/clock/gxbb-clkc.h              |  3 +++
 6 files changed, 76 insertions(+), 3 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/serial/amlogic,meson_uart.txt

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2.11.0