diff options
| author | Sherry Sun | 2023-01-30 14:44:44 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman | 2023-06-28 11:12:17 +0200 |
| commit | 17732fed852a3a50f8ceb92399c45a3f5e8a08a3 (patch) | |
| tree | 62fadd86a67473acab002fb3857b80ca9966bdf5 /drivers/tty | |
| parent | 9bcac453890bf2c0ab5a7cefb407c0a9d6cbc4cb (diff) | |
tty: serial: fsl_lpuart: make rx_watermark configurable for different platforms
[ Upstream commit 34ebb26f12a84b744f43c5c4869516f122a2dfaa ]
Add rx_watermark parameter for struct lpuart_port to make the receive
watermark configurable for different platforms.
No function changed.
Signed-off-by: Sherry Sun <sherry.sun@nxp.com>
Link: https://lore.kernel.org/r/20230130064449.9564-2-sherry.sun@nxp.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Stable-dep-of: a82c3df955f8 ("tty: serial: fsl_lpuart: reduce RX watermark to 0 on LS1028A")
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/serial/fsl_lpuart.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/drivers/tty/serial/fsl_lpuart.c b/drivers/tty/serial/fsl_lpuart.c index dc7ac1ddbca5..82066f17bdfb 100644 --- a/drivers/tty/serial/fsl_lpuart.c +++ b/drivers/tty/serial/fsl_lpuart.c @@ -257,6 +257,7 @@ struct lpuart_port { unsigned int txfifo_size; unsigned int rxfifo_size; + u8 rx_watermark; bool lpuart_dma_tx_use; bool lpuart_dma_rx_use; struct dma_chan *dma_tx_chan; @@ -283,38 +284,45 @@ struct lpuart_soc_data { enum lpuart_type devtype; char iotype; u8 reg_off; + u8 rx_watermark; }; static const struct lpuart_soc_data vf_data = { .devtype = VF610_LPUART, .iotype = UPIO_MEM, + .rx_watermark = 1, }; static const struct lpuart_soc_data ls1021a_data = { .devtype = LS1021A_LPUART, .iotype = UPIO_MEM32BE, + .rx_watermark = 1, }; static const struct lpuart_soc_data ls1028a_data = { .devtype = LS1028A_LPUART, .iotype = UPIO_MEM32, + .rx_watermark = 1, }; static struct lpuart_soc_data imx7ulp_data = { .devtype = IMX7ULP_LPUART, .iotype = UPIO_MEM32, .reg_off = IMX_REG_OFF, + .rx_watermark = 1, }; static struct lpuart_soc_data imx8qxp_data = { .devtype = IMX8QXP_LPUART, .iotype = UPIO_MEM32, .reg_off = IMX_REG_OFF, + .rx_watermark = 1, }; static struct lpuart_soc_data imxrt1050_data = { .devtype = IMXRT1050_LPUART, .iotype = UPIO_MEM32, .reg_off = IMX_REG_OFF, + .rx_watermark = 1, }; static const struct of_device_id lpuart_dt_ids[] = { @@ -1533,7 +1541,7 @@ static void lpuart_setup_watermark(struct lpuart_port *sport) } writeb(0, sport->port.membase + UARTTWFIFO); - writeb(1, sport->port.membase + UARTRWFIFO); + writeb(sport->rx_watermark, sport->port.membase + UARTRWFIFO); /* Restore cr2 */ writeb(cr2_saved, sport->port.membase + UARTCR2); @@ -1568,7 +1576,8 @@ static void lpuart32_setup_watermark(struct lpuart_port *sport) lpuart32_write(&sport->port, val, UARTFIFO); /* set the watermark */ - val = (0x1 << UARTWATER_RXWATER_OFF) | (0x0 << UARTWATER_TXWATER_OFF); + val = (sport->rx_watermark << UARTWATER_RXWATER_OFF) | + (0x0 << UARTWATER_TXWATER_OFF); lpuart32_write(&sport->port, val, UARTWATER); /* Restore cr2 */ @@ -2714,6 +2723,7 @@ static int lpuart_probe(struct platform_device *pdev) sport->port.dev = &pdev->dev; sport->port.type = PORT_LPUART; sport->devtype = sdata->devtype; + sport->rx_watermark = sdata->rx_watermark; ret = platform_get_irq(pdev, 0); if (ret < 0) return ret; |