kernel/linux.git/drivers/tty/serial/sh-sci.h, branch v4.11.5

serial: sh-sci: consider DR (data ready) bit adequately

2017-02-03T09:14:10+00:00

To allow operation with a higher RX FIFO interrupt threshold in PIO mode, it is necessary to consider the DR bit ("FIFO not full, but no data received for 1.5 frames") as an indicator that data can be read. Otherwise the driver will let data rot in the FIFO until the threshold is reached. Signed-off-by: Ulrich Hecht Signed-off-by: Greg Kroah-Hartman

serial: sh-sci: add FIFO trigger bits

2017-02-03T09:14:10+00:00

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: Extend sci_port_params with more port parameters

2017-01-19T13:17:05+00:00

The fifo size, overrun register and mask, sampling rate mask and error mask all depend on the port type only and don't need to be computed at runtime. Add them to the sci_port_parameters structure. Signed-off-by: Laurent Pinchart Reviewed-by: Geert Uytterhoeven Signed-off-by: Greg Kroah-Hartman

serial: sh-sci: Clear (H)SCIF timeout and overrun during reset

2016-06-25T16:09:53+00:00

Add the missing timeout bit definition for (H)SCIF. Clear the timeout and overrun flag bits during UART reset, cfr. the initialization flowchart in the datasheet. Signed-off-by: Geert Uytterhoeven Signed-off-by: Greg Kroah-Hartman

serial: sh-sci: Add more Serial Port Control/Data Register documentation

2016-06-25T16:07:51+00:00

Improve documentation for the SCIFA/SCIFB Serial Port Control and Data Registers: - State clearly that the RTS and CTS lines are active-low, - Document the bits related to the serial port's SCK, RXD, and TXD pins. Signed-off-by: Geert Uytterhoeven Reviewed-by: Peter Hurley Signed-off-by: Greg Kroah-Hartman

serial: sh-sci: Add more Serial Port Register documentation

2016-06-25T16:07:51+00:00

Improve documentation for the (H)SCIF Serial Port Register: - Make it clear the RTS and CTS lines are active-low, - Document the bits related to the serial port's clock pin. Signed-off-by: Geert Uytterhoeven Reviewed-by: Peter Hurley Signed-off-by: Greg Kroah-Hartman

serial: sh-sci: Add more Serial Mode Register documentation

2016-02-07T06:54:55+00:00

Signed-off-by: Geert Uytterhoeven Signed-off-by: Greg Kroah-Hartman

serial: sh-sci: Add BRG register definitions

2015-12-17T10:18:44+00:00

Add register definitions for the Baud Rate Generator for External Clock (BRG), as found in some SCIF and in HSCIF, including a new regtype for the "SH-4(A)"-derived SCIF variant with BRG. Signed-off-by: Geert Uytterhoeven Acked-by: Greg Kroah-Hartman

serial: sh-sci: Correct SCIF_ERROR_CLEAR for plain SCIF

2015-10-04T16:33:48+00:00

SCIF_ERROR_CLEAR includes SCIFA_ORER, which exists only on SCIFA/SCIFB and SCIF on sh7705/sh7720/sh7721. To fix this: 1. Remove SCIFA_ORER from the definition of SCIF_ERROR_CLEAR, 2. During initialization, store the error clear mask to use, incorporating the overrun bit only if it applies to the SCxSR register. Signed-off-by: Geert Uytterhoeven Signed-off-by: Greg Kroah-Hartman

serial: sh-sci: Prevent compiler warnings on 64-bit

2015-10-04T16:33:48+00:00

Expressions involving "BIT(...)" create values of type "long", which is 64-bit on 64-bit. Hence "~BIT(...)" no longer fits in 32-bit, which will cause future compiler warnings when assigning to 32-bit variables: drivers/tty/serial/sh-sci.c: In function 'sci_init_single': drivers/tty/serial/sh-sci.h:58:25: warning: large integer implicitly truncated to unsigned type [-Woverflow] #define SCI_ERROR_CLEAR ~(SCI_RESERVED | SCI_PER | SCI_FER | SCI_ORER) ^ drivers/tty/serial/sh-sci.c:2325:27: note: in expansion of macro 'SCI_ERROR_CLEAR' sci_port->error_clear = SCI_ERROR_CLEAR; As these values are (at most) 32-bit register values anyway, cast them to "u32" at the definition level to prevent such compiler warnings. Reported-by: kbuild test robot Signed-off-by: Geert Uytterhoeven Signed-off-by: Greg Kroah-Hartman