The lpuart of imx8ulp is basically the same as imx7ulp, but it supports
some new features based on imx7ulp, such as it can assert the DMA
request on EOP(end-of-packet).
Here add lpuart support for imx8ulp, and rx_watermark is set to 3 as
imx8ulp RX FIFO depth is 8.
Signed-off-by: Sherry Sun <sherry.sun@xxxxxxx>
---
drivers/tty/serial/fsl_lpuart.c | 16 +++++++++++++++-
1 file changed, 15 insertions(+), 1 deletion(-)
diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c
index c35e49a09bcc..644827e97cb0 100644
--- a/drivers/tty/serial/fsl_lpuart.c
+++ b/drivers/tty/serial/fsl_lpuart.c
@@ -252,6 +252,7 @@ enum lpuart_type {
LS1021A_LPUART,
LS1028A_LPUART,
IMX7ULP_LPUART,
+ IMX8ULP_LPUART,
IMX8QXP_LPUART,
IMXRT1050_LPUART,
};
@@ -319,6 +320,13 @@ static struct lpuart_soc_data imx7ulp_data = {
.rx_watermark = 1,
};
+static struct lpuart_soc_data imx8ulp_data = {
+ .devtype = IMX8ULP_LPUART,
+ .iotype = UPIO_MEM32,
+ .reg_off = IMX_REG_OFF,
+ .rx_watermark = 3,
+};
+
static struct lpuart_soc_data imx8qxp_data = {
.devtype = IMX8QXP_LPUART,
.iotype = UPIO_MEM32,
@@ -337,6 +345,7 @@ static const struct of_device_id lpuart_dt_ids[] = {
{ .compatible = "fsl,ls1021a-lpuart", .data = &ls1021a_data, },
{ .compatible = "fsl,ls1028a-lpuart", .data = &ls1028a_data, },
{ .compatible = "fsl,imx7ulp-lpuart", .data = &imx7ulp_data, },
+ { .compatible = "fsl,imx8ulp-lpuart", .data = &imx8ulp_data, },
{ .compatible = "fsl,imx8qxp-lpuart", .data = &imx8qxp_data, },
{ .compatible = "fsl,imxrt1050-lpuart", .data = &imxrt1050_data},
{ /* sentinel */ }
@@ -357,6 +366,11 @@ static inline bool is_imx7ulp_lpuart(struct lpuart_port *sport)
return sport->devtype == IMX7ULP_LPUART;
}
+static inline bool is_imx8ulp_lpuart(struct lpuart_port *sport)
+{
+ return sport->devtype == IMX8ULP_LPUART;
+}
+
static inline bool is_imx8qxp_lpuart(struct lpuart_port *sport)
{
return sport->devtype == IMX8QXP_LPUART;
@@ -2691,7 +2705,7 @@ static int lpuart_global_reset(struct lpuart_port *sport)
return ret;
}
- if (is_imx7ulp_lpuart(sport) || is_imx8qxp_lpuart(sport)) {
+ if (is_imx7ulp_lpuart(sport) || is_imx8ulp_lpuart(sport) || is_imx8qxp_lpuart(sport)) {
/*
* If the transmitter is used by earlycon, wait for transmit engine to
* complete and then reset.
--
2.17.1
