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tty: serial: fsl_lpuart: add imx8ulp support

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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@nxp.com>
Link: https://lore.kernel.org/r/20230130064449.9564-7-sherry.sun@nxp.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Sherry Sun 2023-01-30 14:44:49 +08:00 committed by Greg Kroah-Hartman
parent ecba98f9dd
commit ed35d9dc3a
1 changed files with 15 additions and 1 deletions
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16
drivers/tty/serial/fsl_lpuart.c
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@ -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.