From: Sekhar Nori Date: Tue, 14 Jul 2015 08:02:08 +0000 (+0530) Subject: serial: 8250_omap: workaround module disable errata on dra7x SoCs X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=27c93af7e7d9ccdfa28e26767c09106bf0721998;p=linux-beck.git serial: 8250_omap: workaround module disable errata on dra7x SoCs 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 Acked-by: Tony Lindgren Reviewed-by: Peter Hurley Signed-off-by: Greg Kroah-Hartman --- 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 a2ee75dee070..d9a37191a1ae 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);