forked from Minki/linux
52bec4ed4e
in CSR A7DA SoC, uart6 located at BT module and it need multiple clock
sources, so for "sirf,marco-bt-uart" compatible uarts, drivers take 3
clock sources and enable them.
this patch also replaces clk_get by devm_clk_get function and fix DT
binding document in which we missed to fix when we added marco platform
in commit 909102db44 "serial: sirf: add support for Marco chip".
Signed-off-by: Qipan Li <Qipan.Li@csr.com>
Signed-off-by: Barry Song <Baohua.Song@csr.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
48 lines
1.4 KiB
Plaintext
48 lines
1.4 KiB
Plaintext
* CSR SiRFprimaII/atlasVI Universal Synchronous Asynchronous Receiver/Transmitter *
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Required properties:
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- compatible : Should be "sirf,prima2-uart", "sirf, prima2-usp-uart",
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"sirf,marco-uart" or "sirf,marco-bt-uart" which means
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uart located in BT module and used for BT.
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- reg : Offset and length of the register set for the device
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- interrupts : Should contain uart interrupt
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- fifosize : Should define hardware rx/tx fifo size
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- clocks : Should contain uart clock number
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Optional properties:
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- sirf,uart-has-rtscts: we have hardware flow controller pins in hardware
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- rts-gpios: RTS pin for USP-based UART if sirf,uart-has-rtscts is true
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- cts-gpios: CTS pin for USP-based UART if sirf,uart-has-rtscts is true
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Example:
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uart0: uart@b0050000 {
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cell-index = <0>;
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compatible = "sirf,prima2-uart";
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reg = <0xb0050000 0x1000>;
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interrupts = <17>;
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fifosize = <128>;
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clocks = <&clks 13>;
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};
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On the board-specific dts, we can put rts-gpios and cts-gpios like
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usp@b0090000 {
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compatible = "sirf,prima2-usp-uart";
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sirf,uart-has-rtscts;
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rts-gpios = <&gpio 15 0>;
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cts-gpios = <&gpio 46 0>;
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};
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for uart use in BT module,
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uart6: uart@11000000 {
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cell-index = <6>;
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compatible = "sirf,marco-bt-uart", "sirf,marco-uart";
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reg = <0x11000000 0x1000>;
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interrupts = <0 100 0>;
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clocks = <&clks 138>, <&clks 140>, <&clks 141>;
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clock-names = "uart", "general", "noc";
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fifosize = <128>;
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status = "disabled";
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}
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