From 1c06bde643d0a0b17f117539e961300cad69aad3 Mon Sep 17 00:00:00 2001 From: Martyn Welch Date: Thu, 1 Sep 2016 11:30:46 +0200 Subject: [PATCH] Allowing UART DMA to be configured on i.MX53 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 Signed-off-by: Fabien Lahoudere Signed-off-by: Greg Kroah-Hartman --- drivers/tty/serial/imx.c | 17 +++++++++++++++-- 1 file changed, 15 insertions(+), 2 deletions(-) diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c index dc6d6e35488c..782b0e524e14 100644 --- a/drivers/tty/serial/imx.c +++ b/drivers/tty/serial/imx.c @@ -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); -- 2.20.1