Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1307788

[PATCH v4 09/11] serial: 8250_early: Use port->regshift

Show all headers | View raw

earlycon initializes struct uart_port::regshift to the correct
value for UPIO_MEM32 already. Use the port field rather than
hard-coded value.

This enables broader support for various i/o access methods in
8250 earlycon (eg., omap8250 earlycon).

Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
---
 drivers/tty/serial/8250/8250_early.c | 16 ++++++++++------
 1 file changed, 10 insertions(+), 6 deletions(-)

diff --git a/drivers/tty/serial/8250/8250_early.c b/drivers/tty/serial/8250/8250_early.c
index 307fb23..e7cdc0c 100644
--- a/drivers/tty/serial/8250/8250_early.c
+++ b/drivers/tty/serial/8250/8250_early.c
@@ -39,15 +39,17 @@
 
 static unsigned int __init serial8250_early_in(struct uart_port *port, int offset)
 {
+	offset <<= port->regshift;
+
 	switch (port->iotype) {
 	case UPIO_MEM:
 		return readb(port->membase + offset);
 	case UPIO_MEM16:
-		return readw(port->membase + (offset << 1));
+		return readw(port->membase + offset);
 	case UPIO_MEM32:
-		return readl(port->membase + (offset << 2));
+		return readl(port->membase + offset);
 	case UPIO_MEM32BE:
-		return ioread32be(port->membase + (offset << 2));
+		return ioread32be(port->membase + offset);
 	case UPIO_PORT:
 		return inb(port->iobase + offset);
 	default:
@@ -57,18 +59,20 @@ static unsigned int __init serial8250_early_in(struct uart_port *port, int offse
 
 static void __init serial8250_early_out(struct uart_port *port, int offset, int value)
 {
+	offset <<= port->regshift;
+
 	switch (port->iotype) {
 	case UPIO_MEM:
 		writeb(value, port->membase + offset);
 		break;
 	case UPIO_MEM16:
-		writew(value, port->membase + (offset << 1));
+		writew(value, port->membase + offset);
 		break;
 	case UPIO_MEM32:
-		writel(value, port->membase + (offset << 2));
+		writel(value, port->membase + offset);
 		break;
 	case UPIO_MEM32BE:
-		iowrite32be(value, port->membase + (offset << 2));
+		iowrite32be(value, port->membase + offset);
 		break;
 	case UPIO_PORT:
 		outb(value, port->iobase + offset);
-- 
2.7.0

Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

[PATCH v4 00/11] Earlycon cleanup Peter Hurley <peter@hurleysoftware.com> - 2016-01-12 20:50 +0100
  [PATCH v4 08/11] serial: earlycon: Show the earlycon "driver" in banner Peter Hurley <peter@hurleysoftware.com> - 2016-01-12 20:50 +0100
  [PATCH v4 11/11] serial: 8250_omap: Add omap8250 earlycon Peter Hurley <peter@hurleysoftware.com> - 2016-01-12 20:50 +0100
    Re: [PATCH v4 11/11] serial: 8250_omap: Add omap8250 earlycon Peter Hurley <peter@hurleysoftware.com> - 2016-01-12 21:00 +0100
      Re: [PATCH v4 11/11] serial: 8250_omap: Add omap8250 earlycon Jon Hunter <jonathanh@nvidia.com> - 2016-01-13 10:30 +0100
        Re: [PATCH v4 11/11] serial: 8250_omap: Add omap8250 earlycon Jon Hunter <jonathanh@nvidia.com> - 2016-01-13 11:00 +0100
        Re: [PATCH v4 11/11] serial: 8250_omap: Add omap8250 earlycon Jon Hunter <jonathanh@nvidia.com> - 2016-01-13 11:20 +0100
          Re: [PATCH v4 11/11] serial: 8250_omap: Add omap8250 earlycon Peter Hurley <peter@hurleysoftware.com> - 2016-01-13 18:10 +0100
            Re: [PATCH v4 11/11] serial: 8250_omap: Add omap8250 earlycon Jon Hunter <jonathanh@nvidia.com> - 2016-01-13 18:20 +0100
  [PATCH v4 10/11] of: earlycon: Log more helpful message if stdout-path node not found Peter Hurley <peter@hurleysoftware.com> - 2016-01-12 20:50 +0100
    Re: [PATCH v4 10/11] of: earlycon: Log more helpful message if  stdout-path node not found Rob Herring <robh+dt@kernel.org> - 2016-01-13 00:40 +0100
  [PATCH v4 02/11] serial: earlycon: Fixup earlycon console name and index Peter Hurley <peter@hurleysoftware.com> - 2016-01-12 20:50 +0100
  [PATCH v4 05/11] of: earlycon: Initialize port fields from DT properties Peter Hurley <peter@hurleysoftware.com> - 2016-01-12 20:50 +0100
    Re: [PATCH v4 05/11] of: earlycon: Initialize port fields from DT properties Rob Herring <robh+dt@kernel.org> - 2016-01-13 01:00 +0100
      Re: [PATCH v4 05/11] of: earlycon: Initialize port fields from DT  properties Peter Hurley <peter@hurleysoftware.com> - 2016-01-13 17:40 +0100
  [PATCH v4 06/11] of: earlycon: Move address translation to of_setup_earlycon() Peter Hurley <peter@hurleysoftware.com> - 2016-01-12 20:50 +0100
  [PATCH v4 07/11] serial: earlycon: Common log banner for command line and DT Peter Hurley <peter@hurleysoftware.com> - 2016-01-12 20:50 +0100
  [PATCH v4 09/11] serial: 8250_early: Use port->regshift Peter Hurley <peter@hurleysoftware.com> - 2016-01-12 20:50 +0100
  Re: [PATCH v4 00/11] Earlycon cleanup Rob Herring <robh+dt@kernel.org> - 2016-01-13 01:00 +0100

csiph-web