diff options
| -rw-r--r-- | Documentation/devicetree/bindings/serial/sirf-uart.txt | 16 | ||||
| -rw-r--r-- | drivers/tty/serial/sirfsoc_uart.c | 34 | ||||
| -rw-r--r-- | drivers/tty/serial/sirfsoc_uart.h | 4 |
3 files changed, 46 insertions, 8 deletions
diff --git a/Documentation/devicetree/bindings/serial/sirf-uart.txt b/Documentation/devicetree/bindings/serial/sirf-uart.txt index a2dfc65..3acdd96 100644 --- a/Documentation/devicetree/bindings/serial/sirf-uart.txt +++ b/Documentation/devicetree/bindings/serial/sirf-uart.txt @@ -1,7 +1,9 @@ * CSR SiRFprimaII/atlasVI Universal Synchronous Asynchronous Receiver/Transmitter * Required properties: -- compatible : Should be "sirf,prima2-uart" or "sirf, prima2-usp-uart" +- compatible : Should be "sirf,prima2-uart", "sirf, prima2-usp-uart", + "sirf,marco-uart" or "sirf,marco-bt-uart" which means + uart located in BT module and used for BT. - reg : Offset and length of the register set for the device - interrupts : Should contain uart interrupt - fifosize : Should define hardware rx/tx fifo size @@ -31,3 +33,15 @@ usp@b0090000 { rts-gpios = <&gpio 15 0>; cts-gpios = <&gpio 46 0>; }; + +for uart use in BT module, +uart6: uart@11000000 { + cell-index = <6>; + compatible = "sirf,marco-bt-uart", "sirf,marco-uart"; + reg = <0x11000000 0x1000>; + interrupts = <0 100 0>; + clocks = <&clks 138>, <&clks 140>, <&clks 141>; + clock-names = "uart", "general", "noc"; + fifosize = <128>; + status = "disabled"; +} diff --git a/drivers/tty/serial/sirfsoc_uart.c b/drivers/tty/serial/sirfsoc_uart.c index 4102192..2f6c6b0 100644 --- a/drivers/tty/serial/sirfsoc_uart.c +++ b/drivers/tty/serial/sirfsoc_uart.c @@ -1032,10 +1032,19 @@ static void sirfsoc_uart_pm(struct uart_port *port, unsigned int state, unsigned int oldstate) { struct sirfsoc_uart_port *sirfport = to_sirfport(port); - if (!state) + if (!state) { + if (sirfport->is_bt_uart) { + clk_prepare_enable(sirfport->clk_noc); + clk_prepare_enable(sirfport->clk_general); + } clk_prepare_enable(sirfport->clk); - else + } else { clk_disable_unprepare(sirfport->clk); + if (sirfport->is_bt_uart) { + clk_disable_unprepare(sirfport->clk_general); + clk_disable_unprepare(sirfport->clk_noc); + } + } } static int sirfsoc_uart_startup(struct uart_port *port) @@ -1378,12 +1387,26 @@ usp_no_flow_control: } port->irq = res->start; - sirfport->clk = clk_get(&pdev->dev, NULL); + sirfport->clk = devm_clk_get(&pdev->dev, NULL); if (IS_ERR(sirfport->clk)) { ret = PTR_ERR(sirfport->clk); goto err; } port->uartclk = clk_get_rate(sirfport->clk); + if (of_device_is_compatible(pdev->dev.of_node, "sirf,marco-bt-uart")) { + sirfport->clk_general = devm_clk_get(&pdev->dev, "general"); + if (IS_ERR(sirfport->clk_general)) { + ret = PTR_ERR(sirfport->clk_general); + goto err; + } + sirfport->clk_noc = devm_clk_get(&pdev->dev, "noc"); + if (IS_ERR(sirfport->clk_noc)) { + ret = PTR_ERR(sirfport->clk_noc); + goto err; + } + sirfport->is_bt_uart = true; + } else + sirfport->is_bt_uart = false; port->ops = &sirfsoc_uart_ops; spin_lock_init(&port->lock); @@ -1392,7 +1415,7 @@ usp_no_flow_control: ret = uart_add_one_port(&sirfsoc_uart_drv, port); if (ret != 0) { dev_err(&pdev->dev, "Cannot add UART port(%d).\n", pdev->id); - goto port_err; + goto err; } sirfport->rx_dma_chan = dma_request_slave_channel(port->dev, "rx"); @@ -1421,8 +1444,6 @@ alloc_coherent_err: sirfport->rx_dma_items[j].xmit.buf, sirfport->rx_dma_items[j].dma_addr); dma_release_channel(sirfport->rx_dma_chan); -port_err: - clk_put(sirfport->clk); err: return ret; } @@ -1431,7 +1452,6 @@ static int sirfsoc_uart_remove(struct platform_device *pdev) { struct sirfsoc_uart_port *sirfport = platform_get_drvdata(pdev); struct uart_port *port = &sirfport->port; - clk_put(sirfport->clk); uart_remove_one_port(&sirfsoc_uart_drv, port); if (sirfport->rx_dma_chan) { int i; diff --git a/drivers/tty/serial/sirfsoc_uart.h b/drivers/tty/serial/sirfsoc_uart.h index 6a7ebf7..275d038 100644 --- a/drivers/tty/serial/sirfsoc_uart.h +++ b/drivers/tty/serial/sirfsoc_uart.h @@ -417,6 +417,10 @@ struct sirfsoc_uart_port { struct uart_port port; struct clk *clk; + /* UART6 for BT usage in A7DA platform need multi-clock source */ + bool is_bt_uart; + struct clk *clk_general; + struct clk *clk_noc; /* for SiRFmarco, there are SET/CLR for UART_INT_EN */ bool is_marco; struct sirfsoc_uart_register *uart_reg; |