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tty/serial: atmel: add ISO7816 support

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When mode is set in atmel_config_iso7816() we backup last RS232 mode
for coming back to this mode if requested.
Also allow setup of T=0 and T=1 parameter and basic support in set_termios
function as well.

Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
[ludovic.desroches@microchip.com: rebase, add check on fidi ratio, checkpatch fixes]
Signed-off-by: Ludovic Desroches <ludovic.desroches@microchip.com>
Acked-by: Richard Genoud <richard.genoud@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Nicolas Ferre
2018-09-26 14:58:48 +02:00
committed by Greg Kroah-Hartman
parent ad8c0eaa0a
commit 377fedd186
2 changed files with 181 additions and 12 deletions
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3
drivers/tty/serial/atmel_serial.h
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@@ -78,7 +78,8 @@
#define ATMEL_US_OVER BIT(19) /* Oversampling Mode */
#define ATMEL_US_INACK BIT(20) /* Inhibit Non Acknowledge */
#define ATMEL_US_DSNACK BIT(21) /* Disable Successive NACK */
#define ATMEL_US_MAX_ITER GENMASK(26, 24) /* Max Iterations */
#define ATMEL_US_MAX_ITER_MASK GENMASK(26, 24) /* Max Iterations */
#define ATMEL_US_MAX_ITER(n) (((n) << 24) & ATMEL_US_MAX_ITER_MASK)
#define ATMEL_US_FILTER BIT(28) /* Infrared Receive Line Filter */
#define ATMEL_US_IER 0x08 /* Interrupt Enable Register */