linux/drivers/tty/serial/sh-sci.c, branch v4.11

serial: sh-sci: fix hardware RX trigger level setting

2017-02-10T14:10:16Z

1. Do not set the RX trigger level for software timeout devices on reset; there is no timeout by default, and data will rot. 2. Do set the RX trigger level for hardware timeout devices when set via sysfs attribute. Fixes SCIFA-type serial consoles. Signed-off-by: Ulrich Hecht Tested-by: Geert Uytterhoeven Signed-off-by: Greg Kroah-Hartman

serial: sh-sci: make RX FIFO parameters tunable via sysfs

2017-02-06T08:47:52Z

Allows tuning of the RX FIFO fill threshold and timeout. (The latter is only applicable to SCIFA and SCIFB). Signed-off-by: Ulrich Hecht Reviewed-by: Geert Uytterhoeven Signed-off-by: Greg Kroah-Hartman

serial: sh-sci: SCIFA/B RX FIFO software timeout

2017-02-06T08:47:51Z

Implements support for FIFO fill thresholds greater than one with software timeout. This mechanism is not possible (or at least not useful) on SCIF family hardware other than SCIFA and SCIFB because they do not support turning off the DR hardware timeout interrupt separately from the RI interrupt. Signed-off-by: Ulrich Hecht Signed-off-by: Greg Kroah-Hartman

serial: sh-sci: increase RX FIFO trigger defaults for (H)SCIF

2017-02-06T08:47:51Z

Sets reasonable trigger defaults for the various SCIF variants. Also corrects the FIFO size for SH7705-style ports. Signed-off-by: Ulrich Hecht Reviewed-by: Geert Uytterhoeven Signed-off-by: Greg Kroah-Hartman

serial: sh-sci: implement FIFO threshold register setting

2017-02-03T09:14:10Z

Sets the closest match for a desired RX trigger level. Signed-off-by: Ulrich Hecht Reviewed-by: Geert Uytterhoeven Signed-off-by: Greg Kroah-Hartman

serial: sh-sci: add FIFO trigger bits

2017-02-03T09:14:10Z

Defines the bits controlling FIFO thresholds, adds the additional HSCIF registers to the register map. Signed-off-by: Ulrich Hecht Reviewed-by: Geert Uytterhoeven Signed-off-by: Greg Kroah-Hartman

serial: sh-sci: Reformat sci_parse_dt() for git diff

2017-01-27T08:23:36Z

As the function header of sci_parse_dt() is split in an unusual way, "git diff" gets confused when changes to the body of the function are made, and attributes them to the wrong function. Reformat the function header to fix this. Signed-off-by: Geert Uytterhoeven Reviewed-by: Simon Horman Signed-off-by: Greg Kroah-Hartman

serial: sh-sci: Compute the regshift value for SCI ports

2017-01-19T13:17:05Z

SCI instances found in SH SoCs have different spacing between registers depending on the SoC. The platform data contains a regshift field that tells the driver by how many bits to shift the register offset to compute its address. We can compute the regshift value automatically based on the memory resource size, there's no need to pass the value through platform data. Fix the sh7750 SCI and sh7760 SIM port memory resources length to ensure proper computation of the regshift value. Signed-off-by: Laurent Pinchart Reviewed-by: Geert Uytterhoeven Signed-off-by: Greg Kroah-Hartman

serial: sh-sci: Remove unused platform data capabilities field

2017-01-19T13:17:05Z

The field isn't set by any platform but is only used internally in the driver to hold data parsed from DT. Move it to the sci_port structure. Signed-off-by: Laurent Pinchart Reviewed-by: Geert Uytterhoeven Signed-off-by: Greg Kroah-Hartman

serial: sh-sci: Remove manual break debouncing

2017-01-19T13:17:05Z

The sh-sci driver implements manual break debouncing for a few SH platforms by reading the value of the RX pin port register. This feature is optional and the driver considers all negative or zero values of the platform data port_reg field as invalid. As the four platforms that set the field to a register address all use an address higher than 0x7fffffff, the driver will always consider the value as invalid and never perform debouncing. The feature is unused, remove it. Debouncing could be implemented properly in the future using the pinctrl and GPIO APIs if desired. Signed-off-by: Laurent Pinchart Reviewed-by: Geert Uytterhoeven Signed-off-by: Greg Kroah-Hartman