leandrof/linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Allowing UART DMA to be configured on i.MX53

Browse Source 
The UART DMA was only being configured on i.MX6Q compatible devices. We
know that the DMA also works for i.MX53 devices, so enable uart DMA for
imx53 and let the device tree to configure if DMA should be used or not.

Signed-off-by: Martyn Welch <martyn.welch@collabora.co.uk>
Signed-off-by: Fabien Lahoudere <fabien.lahoudere@collabora.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Martyn Welch 2016-09-01 11:30:46 +02:00 committed by Greg Kroah-Hartman
parent 31d054dccc
commit 1c06bde643
1 changed files with 15 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
drivers/tty/serial/imx.c
View File

@ -190,6 +190,7 @@
enum imx_uart_type {
IMX1_UART,
IMX21_UART,
IMX53_UART,
IMX6Q_UART,
};
@ -247,6 +248,10 @@ static struct imx_uart_data imx_uart_devdata[] = {
.uts_reg = IMX21_UTS,
.devtype = IMX21_UART,
},
[IMX53_UART] = {
.uts_reg = IMX21_UTS,
.devtype = IMX53_UART,
},
[IMX6Q_UART] = {
.uts_reg = IMX21_UTS,
.devtype = IMX6Q_UART,
@ -260,6 +265,9 @@ static const struct platform_device_id imx_uart_devtype[] = {
}, {
.name = "imx21-uart",
.driver_data = (kernel_ulong_t) &imx_uart_devdata[IMX21_UART],
}, {
.name = "imx53-uart",
.driver_data = (kernel_ulong_t) &imx_uart_devdata[IMX53_UART],
}, {
.name = "imx6q-uart",
.driver_data = (kernel_ulong_t) &imx_uart_devdata[IMX6Q_UART],
@ -271,6 +279,7 @@ MODULE_DEVICE_TABLE(platform, imx_uart_devtype);
static const struct of_device_id imx_uart_dt_ids[] = {
{ .compatible = "fsl,imx6q-uart", .data = &imx_uart_devdata[IMX6Q_UART], },
{ .compatible = "fsl,imx53-uart", .data = &imx_uart_devdata[IMX53_UART], },
{ .compatible = "fsl,imx1-uart", .data = &imx_uart_devdata[IMX1_UART], },
{ .compatible = "fsl,imx21-uart", .data = &imx_uart_devdata[IMX21_UART], },
{ /* sentinel */ }
@ -292,6 +301,11 @@ static inline int is_imx21_uart(struct imx_port *sport)
return sport->devdata->devtype == IMX21_UART;
}
static inline int is_imx53_uart(struct imx_port *sport)
{
return sport->devdata->devtype == IMX53_UART;
}
static inline int is_imx6q_uart(struct imx_port *sport)
{
return sport->devdata->devtype == IMX6Q_UART;
@ -1254,8 +1268,7 @@ static int imx_startup(struct uart_port *port)
writel(temp & ~UCR4_DREN, sport->port.membase + UCR4);
/* Can we enable the DMA support? */
if (is_imx6q_uart(sport) && !uart_console(port) &&
!sport->dma_is_inited)
if (!uart_console(port) && !sport->dma_is_inited)
imx_uart_dma_init(sport);
spin_lock_irqsave(&sport->port.lock, flags);