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29 lines
875 B
Diff
29 lines
875 B
Diff
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From 74d7e639cce7ae95cacd948dcf5ed3b28c3fff5c Mon Sep 17 00:00:00 2001
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From: Fugang Duan <fugang.duan@nxp.com>
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Date: Mon, 28 Jan 2019 10:27:27 +0800
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Subject: [PATCH] tty: serial: fsl_lpuart: add magic SysRq support
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Add magic SysRq key support.
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Signed-off-by: Fugang Duan <fugang.duan@nxp.com>
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---
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drivers/tty/serial/fsl_lpuart.c | 7 ++++++-
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1 file changed, 6 insertions(+), 1 deletion(-)
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--- a/drivers/tty/serial/fsl_lpuart.c
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+++ b/drivers/tty/serial/fsl_lpuart.c
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@@ -920,7 +920,12 @@ static void lpuart32_rxint(struct lpuart
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*/
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sr = lpuart32_read(&sport->port, UARTSTAT);
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rx = lpuart32_read(&sport->port, UARTDATA);
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- rx &= 0x3ff;
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+
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+ if ((sr & UARTSTAT_FE) && (rx & UARTDATA_FRETSC) &&
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+ !(rx & UARTDATA_MASK)) {
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+ if (uart_handle_break(&sport->port))
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+ continue;
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+ }
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if (uart_handle_sysrq_char(&sport->port, (unsigned char)rx))
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continue;
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