Hi! This is an attempt to add multiplexer support to serdev, specifically GPIO-based multiplexing. Our use case is the Renesas Blanche V2H board with several MAX9260 GMSL deserializers attached to one serial port. A sample driver that implements i2c passthrough over the GMSL link is part of this series. This device wants to be talked to with even parity, so a patch implementing parity control in serdev is included as well. The board-specific part of this series depends on the "pinctrl: sh-pfc: r8a7792: Add SCIF1 pin groups" patch. Please tell me if this is a suitable way to implement this functionality in serdev, or how to improve it. Thank you. CU Uli Ulrich Hecht (4): serdev: add method to set parity serdev: add GPIO-based multiplexer support max9260: add driver for i2c over GMSL passthrough ARM: dts: blanche: add SCIF1 and MAX9260 deserializer arch/arm/boot/dts/r8a7792-blanche.dts | 45 ++++++ drivers/media/i2c/Kconfig | 6 + drivers/media/i2c/Makefile | 1 + drivers/media/i2c/max9260.c | 294 ++++++++++++++++++++++++++++++++++ drivers/tty/serdev/Kconfig | 3 + drivers/tty/serdev/Makefile | 1 + drivers/tty/serdev/core.c | 55 ++++++- drivers/tty/serdev/mux-gpio.c | 80 +++++++++ drivers/tty/serdev/serdev-ttyport.c | 17 ++ include/linux/serdev.h | 30 +++- 10 files changed, 528 insertions(+), 4 deletions(-) create mode 100644 drivers/media/i2c/max9260.c create mode 100644 drivers/tty/serdev/mux-gpio.c -- 2.7.4
