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serial: sh-sci: Allow for compressed SCIF address 

Some devices with SCIx_SH4_SCIF_REGTYPE have no space between registers.
Use the register area size to determine the spacing between register.

Signed-off-by: Chris Brandt <chris.brandt@renesas.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Chris Brandt 2018-07-31 05:41:37 -05:00 committed by Greg Kroah-Hartman
parent 70a15ff0ed
commit 2d4dd0da45
1 changed files with 15 additions and 10 deletions
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25
drivers/tty/serial/sh-sci.c
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@ -348,15 +348,15 @@ static const struct sci_port_params sci_port_params[SCIx_NR_REGTYPES] = {
[SCIx_SH4_SCIF_REGTYPE] = {
.regs = {
[SCSMR] = { 0x00, 16 },
[SCBRR] = { 0x04, 8 },
[SCSCR] = { 0x08, 16 },
[SCxTDR] = { 0x0c, 8 },
[SCxSR] = { 0x10, 16 },
[SCxRDR] = { 0x14, 8 },
[SCFCR] = { 0x18, 16 },
[SCFDR] = { 0x1c, 16 },
[SCSPTR] = { 0x20, 16 },
[SCLSR] = { 0x24, 16 },
[SCBRR] = { 0x02, 8 },
[SCSCR] = { 0x04, 16 },
[SCxTDR] = { 0x06, 8 },
[SCxSR] = { 0x08, 16 },
[SCxRDR] = { 0x0a, 8 },
[SCFCR] = { 0x0c, 16 },
[SCFDR] = { 0x0e, 16 },
[SCSPTR] = { 0x10, 16 },
[SCLSR] = { 0x12, 16 },
},
.fifosize = 16,
.overrun_reg = SCLSR,
@ -2848,7 +2848,7 @@ static int sci_init_single(struct platform_device *dev,
{
struct uart_port *port = &sci_port->port;
const struct resource *res;
unsigned int i;
unsigned int i, regtype;
int ret;
sci_port->cfg = p;
@ -2885,6 +2885,7 @@ static int sci_init_single(struct platform_device *dev,
if (unlikely(sci_port->params == NULL))
return -EINVAL;
regtype = sci_port->params - sci_port_params;
switch (p->type) {
case PORT_SCIFB:
sci_port->rx_trigger = 48;
@ -2939,6 +2940,10 @@ static int sci_init_single(struct platform_device *dev,
port->regshift = 1;
}
if (regtype == SCIx_SH4_SCIF_REGTYPE)
if (sci_port->reg_size >= 0x20)
port->regshift = 1;
/*
* The UART port needs an IRQ value, so we peg this to the RX IRQ
* for the multi-IRQ ports, which is where we are primarily