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dm: serial: Add driver model support for ns16550

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Add driver model support so that ns16550 can support operation both with
and without driver model.

The driver needs a clock frequency so cannot stand alone unfortunately. The
clock frequency must be provided by a separate driver.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass
2014-09-04 16:27:34 -06:00
parent 8bbe33c829
commit 12e431b277
4 changed files with 218 additions and 3 deletions
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10
doc/device-tree-bindings/serial/ns16550.txt Normal file
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NS16550 UART
This UART driver supports many chip variants and is used in mamy SoCs.
Required properties:
- compatible: "ns16550" or "nvidia,tegra20-uart"
- reg: start address and size of registers
- reg-shift: shift value indicating register size: 0=byte, 1=16bit,2=32bit etc.
- clock-frequency: input clock frequency for the UART (used to calculate the
baud rate divisor)