39 lines
1.0 KiB
Diff
39 lines
1.0 KiB
Diff
--- a/drivers/serial/samsung.c
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+++ b/drivers/serial/samsung.c
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@@ -1263,6 +1263,13 @@ module_exit(s3c24xx_serial_modexit);
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#ifdef CONFIG_SERIAL_SAMSUNG_CONSOLE
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static struct uart_port *cons_uart;
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+static int cons_silenced;
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+
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+void s3c24xx_serial_console_set_silence(int silenced)
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+{
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+ cons_silenced = silenced;
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+}
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+EXPORT_SYMBOL(s3c24xx_serial_console_set_silence);
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static int
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s3c24xx_serial_console_txrdy(struct uart_port *port, unsigned int ufcon)
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@@ -1287,9 +1294,21 @@ static void
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s3c24xx_serial_console_putchar(struct uart_port *port, int ch)
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{
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unsigned int ufcon = rd_regl(cons_uart, S3C2410_UFCON);
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+ unsigned int umcon = rd_regl(cons_uart, S3C2410_UMCON);
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+
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+ if (cons_silenced)
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+ return;
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+
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+ /* If auto HW flow control enabled, temporarily turn it off */
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+ if (umcon & S3C2410_UMCOM_AFC)
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+ wr_regl(port, S3C2410_UMCON, (umcon & !S3C2410_UMCOM_AFC));
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+
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while (!s3c24xx_serial_console_txrdy(port, ufcon))
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barrier();
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wr_regb(cons_uart, S3C2410_UTXH, ch);
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+
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+ if (umcon & S3C2410_UMCOM_AFC)
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+ wr_regl(port, S3C2410_UMCON, umcon);
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}
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static void
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