This series adds support for a serial uclass, enabling serial drivers to be converted to use driver model.
Unfortunately this is quite a complicated process for a number of reasons:
- serial is used before relocation, but driver model does not support this - stdio member functions are not passed a device pointer, but driver model requires this (so does serial, but it uses an ugly work-around) - driver model requires malloc() but this is not available before relocation - for sandbox, if something goes wrong with the console, we still need to get an error message out through the fallback console
So this series relies on quite a few patches to address the above, as well as the serial uclass and an implementation for sandbox.
If you have limited time, please take a look at least at the uclass patch which is 'dm: Add a uclass for serial devices' (see include/serial.h).
With v4, exynos boards all build and a second attempt has been made to add Tegra support via the ns16550 driver, tested on beaver.
To see the current state of driver model, look at u-boot-dm.git branch 'working'.
Changes in v4: - Add a binding for sandbox serial - Add a separate Tegra serial driver to deal with the clock issue - Add new CONFIG_TEGRA_SERIAL option to enable dm driver - Remove 'clock-frequency' property from serial nodes - Remove clock frequency setup for ns16550 driver - Remove pre-reloc fdt property - Use hard-coded UART clock from Tegra configuration
Changes in v3: - Add new change to enhance lists_bind_fdt() - Add new patch for tegra serial port details - Add new patch to collect common baud rate code in ns16550 - Add new patch to enable driver model for serial on tegra - Add new patch to move baud rate calculation to ns16550.c - Add new patch to support driver model in ns16550 - Add new patch to use V_NS16550_CLK only in SPL builds - Automatically bind the console even if not marked for pre-relocation - Avoid reordering functions - Change pre-reloc fdt property to 'u-boot,dm-pre-reloc' - Fix typo in commit message
Changes in v2: - Add exynos serial support - Remove RFC status - Rename struct device to struct udevice - Split out core driver model patches into a separate set
Simon Glass (15): serial: Set up the 'priv' pointer when creating a serial device dm: Adjust lists_bind_fdt() to return the bound device dm: Add a uclass for serial devices Set up stdio earlier when using driver model sandbox: Convert serial driver to use driver model sandbox: serial: Support a coloured console sandbox: dts: Add a serial console node dm: exynos: Mark exynos5 console as pre-reloc dm: exynos: Move serial to driver model dm: Make driver model available before board_init() dm: serial: Move baud rate calculation to ns16550.c dm: serial: Collect common baud rate code in ns16550 dm: serial: Add driver model support for ns16550 tegra: dts: Add serial port details dm: tegra: Enable driver model for serial
arch/arm/dts/exynos5.dtsi | 1 + arch/arm/dts/tegra114-dalmore.dts | 1 + arch/arm/dts/tegra114.dtsi | 35 +++ arch/arm/dts/tegra124-jetson-tk1.dts | 1 + arch/arm/dts/tegra124-venice2.dts | 1 + arch/arm/dts/tegra124.dtsi | 35 +++ arch/arm/dts/tegra20-colibri_t20_iris.dts | 1 + arch/arm/dts/tegra20-harmony.dts | 1 + arch/arm/dts/tegra20-medcom-wide.dts | 1 + arch/arm/dts/tegra20-paz00.dts | 1 + arch/arm/dts/tegra20-plutux.dts | 1 + arch/arm/dts/tegra20-seaboard.dts | 1 + arch/arm/dts/tegra20-tec.dts | 1 + arch/arm/dts/tegra20-trimslice.dts | 1 + arch/arm/dts/tegra20-ventana.dts | 1 + arch/arm/dts/tegra20-whistler.dts | 1 + arch/arm/dts/tegra20.dtsi | 10 +- arch/arm/dts/tegra30-beaver.dts | 1 + arch/arm/dts/tegra30-cardhu.dts | 1 + arch/arm/dts/tegra30-tamonten.dtsi | 1 + arch/arm/dts/tegra30.dtsi | 35 +++ arch/sandbox/dts/sandbox.dts | 10 + common/board_r.c | 19 +- common/stdio.c | 18 +- doc/device-tree-bindings/serial/ns16550.txt | 10 + doc/device-tree-bindings/serial/sandbox-serial.txt | 13 ++ drivers/core/lists.c | 10 +- drivers/core/root.c | 2 +- drivers/serial/Makefile | 7 +- drivers/serial/ns16550.c | 203 ++++++++++++++-- drivers/serial/sandbox.c | 140 ++++++++--- drivers/serial/serial-uclass.c | 211 +++++++++++++++++ drivers/serial/serial.c | 1 + drivers/serial/serial_ns16550.c | 23 +- drivers/serial/serial_s5p.c | 255 ++++++--------------- drivers/serial/serial_tegra.c | 38 +++ include/configs/exynos-common.h | 1 + include/configs/sandbox.h | 3 + include/configs/tegra-common.h | 10 +- include/dm/lists.h | 6 +- include/dm/uclass-id.h | 1 + include/ns16550.h | 64 ++++++ include/serial.h | 92 ++++++++ include/stdio_dev.h | 24 +- 44 files changed, 1021 insertions(+), 272 deletions(-) create mode 100644 doc/device-tree-bindings/serial/ns16550.txt create mode 100644 doc/device-tree-bindings/serial/sandbox-serial.txt create mode 100644 drivers/serial/serial-uclass.c create mode 100644 drivers/serial/serial_tegra.c