serial: 8250_omap: workaround module disable errata on dra7x SoCs
authorSekhar Nori <nsekhar@ti.com>
Tue, 14 Jul 2015 08:02:08 +0000 (13:32 +0530)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 23 Jul 2015 22:24:11 +0000 (15:24 -0700)
commit27c93af7e7d9ccdfa28e26767c09106bf0721998
tree64c81e5525d0e76f7f97390ed876e88f518f61fb
parentcdb929e4452a8dab15daccc88e43d0f7e73b5500
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 <nsekhar@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Reviewed-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Documentation/devicetree/bindings/serial/omap_serial.txt
drivers/tty/serial/8250/8250_omap.c