This is a note to let you know that I've just added the patch titled
serial: 8250_mtk: Fix register address for XON/XOFF character
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
serial-8250_mtk-fix-register-address-for-xon-xoff-character.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From e1bfdbc7daca171c74a577b3dd0b36d76bb0ffcc Mon Sep 17 00:00:00 2001
From: AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx>
Date: Wed, 27 Apr 2022 15:23:28 +0200
Subject: serial: 8250_mtk: Fix register address for XON/XOFF character
From: AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx>
commit e1bfdbc7daca171c74a577b3dd0b36d76bb0ffcc upstream.
The XON1/XOFF1 character registers are at offset 0xa0 and 0xa8
respectively, so we cannot use the definition in serial_port.h.
Fixes: bdbd0a7f8f03 ("serial: 8250-mtk: modify baudrate setting")
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx>
Cc: stable <stable@xxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20220427132328.228297-4-angelogioacchino.delregno@xxxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/tty/serial/8250/8250_mtk.c | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)
--- a/drivers/tty/serial/8250/8250_mtk.c
+++ b/drivers/tty/serial/8250/8250_mtk.c
@@ -54,6 +54,9 @@
#define MTK_UART_TX_TRIGGER 1
#define MTK_UART_RX_TRIGGER MTK_UART_RX_SIZE
+#define MTK_UART_XON1 40 /* I/O: Xon character 1 */
+#define MTK_UART_XOFF1 42 /* I/O: Xoff character 1 */
+
#ifdef CONFIG_SERIAL_8250_DMA
enum dma_rx_status {
DMA_RX_START = 0,
@@ -275,8 +278,8 @@ static void mtk8250_set_flow_ctrl(struct
(serial_in(up, MTK_UART_EFR) &
(~(MTK_UART_EFR_HW_FC | MTK_UART_EFR_SW_FC_MASK))));
- serial_out(up, UART_XON1, START_CHAR(port->state->port.tty));
- serial_out(up, UART_XOFF1, STOP_CHAR(port->state->port.tty));
+ serial_out(up, MTK_UART_XON1, START_CHAR(port->state->port.tty));
+ serial_out(up, MTK_UART_XOFF1, STOP_CHAR(port->state->port.tty));
serial_out(up, UART_LCR, lcr);
mtk8250_disable_intrs(up, MTK_UART_IER_CTSI|MTK_UART_IER_RTSI);
mtk8250_enable_intrs(up, MTK_UART_IER_XOFFI);
Patches currently in stable-queue which might be from angelogioacchino.delregno@xxxxxxxxxxxxx are
queue-5.15/serial-8250_mtk-make-sure-to-select-the-right-feature_sel.patch
queue-5.15/serial-8250_mtk-fix-register-address-for-xon-xoff-character.patch
queue-5.15/serial-8250_mtk-fix-uart_efr-register-address.patch
