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author | Qipan Li <Qipan.Li@csr.com> | 2014-11-11 20:44:58 +0800 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-11-25 17:06:38 -0800 |
commit | 52bec4ed4ef83f1a14dbcfd1a97e35f77c6e261e (patch) | |
tree | d927ba80016be050c55d1563d02c1d9c8c0b62fb /drivers/tty | |
parent | e620e54884ceb983c38f979a22fd04ae0820c725 (diff) | |
download | linux-stable-52bec4ed4ef83f1a14dbcfd1a97e35f77c6e261e.tar.gz linux-stable-52bec4ed4ef83f1a14dbcfd1a97e35f77c6e261e.tar.bz2 linux-stable-52bec4ed4ef83f1a14dbcfd1a97e35f77c6e261e.zip |
serial: sirf: add a new uart type support
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 909102db44f "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>
Diffstat (limited to 'drivers/tty')
-rw-r--r-- | drivers/tty/serial/sirfsoc_uart.c | 34 | ||||
-rw-r--r-- | drivers/tty/serial/sirfsoc_uart.h | 4 |
2 files changed, 31 insertions, 7 deletions
diff --git a/drivers/tty/serial/sirfsoc_uart.c b/drivers/tty/serial/sirfsoc_uart.c index 4102192687ee..2f6c6b04cc8d 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 6a7ebf7ef130..275d03893990 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; |