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| author | Robert Baldyga <r.baldyga@samsung.com> | 2014-12-10 12:49:23 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-01-09 23:25:39 +0100 |
| commit | 658c9d2b735fbc066a6608754b0eda77c92e637b (patch) | |
| tree | 57815a986c4ad06568d2ba6a237b46a9db238e11 /drivers/tty/serial/samsung.c | |
| parent | serial: samsung: add struct s3c24xx_uart_dma (diff) | |
| download | linux-658c9d2b735fbc066a6608754b0eda77c92e637b.tar.xz linux-658c9d2b735fbc066a6608754b0eda77c92e637b.zip | |
serial: samsung: alloc dma stucture in ourport
When we have "dmas" property in serial node in device-tree, we do
memory alocation for dma structure which will be used in DMA handling
code.
Based on previous work of Sylwester Nawrocki and Lukasz Czerwinski.
Signed-off-by: Robert Baldyga <r.baldyga@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial/samsung.c')
| -rw-r--r-- | drivers/tty/serial/samsung.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/tty/serial/samsung.c b/drivers/tty/serial/samsung.c index 19273e31d224..7196a3e586cf 100644 --- a/drivers/tty/serial/samsung.c +++ b/drivers/tty/serial/samsung.c @@ -1209,6 +1209,18 @@ static int s3c24xx_serial_init_port(struct s3c24xx_uart_port *ourport, ret = platform_get_irq(platdev, 1); if (ret > 0) ourport->tx_irq = ret; + /* + * DMA is currently supported only on DT platforms, if DMA properties + * are specified. + */ + if (platdev->dev.of_node && of_find_property(platdev->dev.of_node, + "dmas", NULL)) { + ourport->dma = devm_kzalloc(port->dev, + sizeof(*ourport->dma), + GFP_KERNEL); + if (!ourport->dma) + return -ENOMEM; + } ourport->clk = clk_get(&platdev->dev, "uart"); if (IS_ERR(ourport->clk)) { |