[PATCH 6/7] tty: 8250: omap: workaround module disable errata on dra7x SoCs

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 




Due to Advisory 21 as documented in AM437x errata document,
UART module cannot be disabled once DMA is used. The only
workaround is to softreset the module before disabling it.

DRA7x UARTs are compatible to AM437x UARTs in terms of
this errata and prescribed workaround.

Enable usage of workaround for this errata on DRA7x SoCs.

Signed-off-by: Sekhar Nori <nsekhar@xxxxxx>
---
 Documentation/devicetree/bindings/serial/omap_serial.txt | 1 +
 drivers/tty/serial/8250/8250_omap.c                      | 1 +
 2 files changed, 2 insertions(+)

diff --git a/Documentation/devicetree/bindings/serial/omap_serial.txt b/Documentation/devicetree/bindings/serial/omap_serial.txt
index 0ee88209b341..7a71b5de77d6 100644
--- a/Documentation/devicetree/bindings/serial/omap_serial.txt
+++ b/Documentation/devicetree/bindings/serial/omap_serial.txt
@@ -6,6 +6,7 @@ Required properties:
 - compatible : should be "ti,omap4-uart" for OMAP4 controllers
 - compatible : should be "ti,am4372-uart" for AM437x controllers
 - compatible : should be "ti,am3352-uart" for AM335x controllers
+- compatible : should be "ti,dra742-uart" for DRA7x controllers
 - reg : address and length of the register space
 - interrupts or interrupts-extended : Should contain the uart interrupt
                                       specifier or both the interrupt
diff --git a/drivers/tty/serial/8250/8250_omap.c b/drivers/tty/serial/8250/8250_omap.c
index af25869d145f..9811f0bcba25 100644
--- a/drivers/tty/serial/8250/8250_omap.c
+++ b/drivers/tty/serial/8250/8250_omap.c
@@ -1082,6 +1082,7 @@ static const struct of_device_id omap8250_dt_ids[] = {
 	{ .compatible = "ti,omap4-uart" },
 	{ .compatible = "ti,am3352-uart", .data = &am3352_habit, },
 	{ .compatible = "ti,am4372-uart", .data = &am4372_habit, },
+	{ .compatible = "ti,dra742-uart", .data = &am4372_habit, },
 	{},
 };
 MODULE_DEVICE_TABLE(of, omap8250_dt_ids);
-- 
2.4.4.408.g16da57c

--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html



[Index of Archives]     [Device Tree Compilter]     [Device Tree Spec]     [Linux Driver Backports]     [Video for Linux]     [Linux USB Devel]     [Linux PCI Devel]     [Linux Audio Users]     [Linux Kernel]     [Linux SCSI]     [XFree86]     [Yosemite Backpacking]
  Powered by Linux