diff options
Diffstat (limited to 'target/linux/imx6/patches-4.4/113-serial-imx-make-sure-unhandled-irqs-are-disabled.patch')
| -rw-r--r-- | target/linux/imx6/patches-4.4/113-serial-imx-make-sure-unhandled-irqs-are-disabled.patch | 56 |
1 files changed, 0 insertions, 56 deletions
diff --git a/target/linux/imx6/patches-4.4/113-serial-imx-make-sure-unhandled-irqs-are-disabled.patch b/target/linux/imx6/patches-4.4/113-serial-imx-make-sure-unhandled-irqs-are-disabled.patch deleted file mode 100644 index 1c7de3fa6e..0000000000 --- a/target/linux/imx6/patches-4.4/113-serial-imx-make-sure-unhandled-irqs-are-disabled.patch +++ /dev/null @@ -1,56 +0,0 @@ -From a58c6360b9eb3a2374b0b069ba9ce7baec0f26df Mon Sep 17 00:00:00 2001 -From: =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= <u.kleine-koenig@pengutronix.de> -Date: Thu, 24 Mar 2016 14:24:22 +0100 -Subject: [PATCH 3/3] serial: imx: make sure unhandled irqs are disabled -MIME-Version: 1.0 -Content-Type: text/plain; charset=UTF-8 -Content-Transfer-Encoding: 8bit - -Make sure that events that are not handled in the irq function don't -trigger an interrupt. - -When the serial port is operated in DTE mode, the events for DCD and RI -events are enabled after a system reset by default. - -Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> -Signed-off-by: Petr Štetiar <ynezz@true.cz> ---- - drivers/tty/serial/imx.c | 23 ++++++++++++++++++++++- - 1 file changed, 22 insertions(+), 1 deletion(-) - ---- a/drivers/tty/serial/imx.c -+++ b/drivers/tty/serial/imx.c -@@ -1184,11 +1184,32 @@ static int imx_startup(struct uart_port - temp |= (UCR2_RXEN | UCR2_TXEN); - if (!sport->have_rtscts) - temp |= UCR2_IRTS; -+ /* -+ * make sure the edge sensitive RTS-irq is disabled, -+ * we're using RTSD instead. -+ */ -+ if (!is_imx1_uart(sport)) -+ temp &= ~UCR2_RTSEN; - writel(temp, sport->port.membase + UCR2); - - if (!is_imx1_uart(sport)) { - temp = readl(sport->port.membase + UCR3); -- temp |= IMX21_UCR3_RXDMUXSEL | UCR3_ADNIMP; -+ -+ /* -+ * The effect of RI and DCD differs depending on the UFCR_DCEDTE -+ * bit. In DCE mode they control the outputs, in DTE mode they -+ * enable the respective irqs. At least the DCD irq cannot be -+ * cleared on i.MX25 at least, so it's not usable and must be -+ * disabled. I don't have test hardware to check if RI has the -+ * same problem but I consider this likely so it's disabled for -+ * now, too. -+ */ -+ temp |= IMX21_UCR3_RXDMUXSEL | UCR3_ADNIMP | -+ UCR3_RI | UCR3_DCD; -+ -+ if (sport->dte_mode) -+ temp &= ~(UCR3_RI | UCR3_DCD); -+ - writel(temp, sport->port.membase + UCR3); - } - |