Searched hist:bc2be239 (Results 1 – 1 of 1) sorted by relevance
| /openbmc/linux/drivers/tty/serial/ |
| H A D | imx.c | bc2be239 Mon Jan 30 05:12:12 CST 2017 Fabio Estevam <fabio.estevam@nxp.com> serial: imx: Fix the CTS_B polarity in RS485 mode
When userspace passes the SER_RS485_RTS_ON_SEND flag it means that the
CTS_B pin should go to logic level high before the transmission begins.
CTS_B goes to logic level high when both CTSC and CTS bits are cleared.
When userspace passes the SER_RS485_RTS_AFTER_SEND flag it means that the
CTS_B pin should go to logic level low after the transmission finishes.
CTS_B goes to logic level low when CTSC bit is cleared and CTS bit is set.
So fix the CTS_B polarity logic.
Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
bc2be239 Mon Jan 30 05:12:12 CST 2017 Fabio Estevam <fabio.estevam@nxp.com> serial: imx: Fix the CTS_B polarity in RS485 mode
When userspace passes the SER_RS485_RTS_ON_SEND flag it means that the
CTS_B pin should go to logic level high before the transmission begins.
CTS_B goes to logic level high when both CTSC and CTS bits are cleared.
When userspace passes the SER_RS485_RTS_AFTER_SEND flag it means that the
CTS_B pin should go to logic level low after the transmission finishes.
CTS_B goes to logic level low when CTSC bit is cleared and CTS bit is set.
So fix the CTS_B polarity logic.
Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|