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path: root/drivers/tty/goldfish.c
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Diffstat (limited to 'drivers/tty/goldfish.c')
-rw-r--r--drivers/tty/goldfish.c42
1 files changed, 28 insertions, 14 deletions
diff --git a/drivers/tty/goldfish.c b/drivers/tty/goldfish.c
index 0f82c0b146f6..3fc912373adf 100644
--- a/drivers/tty/goldfish.c
+++ b/drivers/tty/goldfish.c
@@ -68,8 +68,7 @@ static void goldfish_tty_do_write(int line, const char *buf, unsigned count)
static irqreturn_t goldfish_tty_interrupt(int irq, void *dev_id)
{
- struct platform_device *pdev = dev_id;
- struct goldfish_tty *qtty = &goldfish_ttys[pdev->id];
+ struct goldfish_tty *qtty = dev_id;
void __iomem *base = qtty->base;
unsigned long irq_flags;
unsigned char *buf;
@@ -162,7 +161,7 @@ static int goldfish_tty_console_setup(struct console *co, char *options)
return 0;
}
-static struct tty_port_operations goldfish_port_ops = {
+static const struct tty_port_operations goldfish_port_ops = {
.activate = goldfish_tty_activate,
.shutdown = goldfish_tty_shutdown
};
@@ -233,6 +232,7 @@ static int goldfish_tty_probe(struct platform_device *pdev)
struct device *ttydev;
void __iomem *base;
u32 irq;
+ unsigned int line;
r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (r == NULL)
@@ -248,10 +248,16 @@ static int goldfish_tty_probe(struct platform_device *pdev)
irq = r->start;
- if (pdev->id >= goldfish_tty_line_count)
- goto err_unmap;
-
mutex_lock(&goldfish_tty_lock);
+
+ if (pdev->id == PLATFORM_DEVID_NONE)
+ line = goldfish_tty_current_line_count;
+ else
+ line = pdev->id;
+
+ if (line >= goldfish_tty_line_count)
+ goto err_create_driver_failed;
+
if (goldfish_tty_current_line_count == 0) {
ret = goldfish_tty_create_driver();
if (ret)
@@ -259,7 +265,7 @@ static int goldfish_tty_probe(struct platform_device *pdev)
}
goldfish_tty_current_line_count++;
- qtty = &goldfish_ttys[pdev->id];
+ qtty = &goldfish_ttys[line];
spin_lock_init(&qtty->lock);
tty_port_init(&qtty->port);
qtty->port.ops = &goldfish_port_ops;
@@ -269,13 +275,13 @@ static int goldfish_tty_probe(struct platform_device *pdev)
writel(GOLDFISH_TTY_CMD_INT_DISABLE, base + GOLDFISH_TTY_CMD);
ret = request_irq(irq, goldfish_tty_interrupt, IRQF_SHARED,
- "goldfish_tty", pdev);
+ "goldfish_tty", qtty);
if (ret)
goto err_request_irq_failed;
ttydev = tty_port_register_device(&qtty->port, goldfish_tty_driver,
- pdev->id, &pdev->dev);
+ line, &pdev->dev);
if (IS_ERR(ttydev)) {
ret = PTR_ERR(ttydev);
goto err_tty_register_device_failed;
@@ -286,8 +292,9 @@ static int goldfish_tty_probe(struct platform_device *pdev)
qtty->console.device = goldfish_tty_console_device;
qtty->console.setup = goldfish_tty_console_setup;
qtty->console.flags = CON_PRINTBUFFER;
- qtty->console.index = pdev->id;
+ qtty->console.index = line;
register_console(&qtty->console);
+ platform_set_drvdata(pdev, qtty);
mutex_unlock(&goldfish_tty_lock);
return 0;
@@ -307,13 +314,12 @@ err_unmap:
static int goldfish_tty_remove(struct platform_device *pdev)
{
- struct goldfish_tty *qtty;
+ struct goldfish_tty *qtty = platform_get_drvdata(pdev);
mutex_lock(&goldfish_tty_lock);
- qtty = &goldfish_ttys[pdev->id];
unregister_console(&qtty->console);
- tty_unregister_device(goldfish_tty_driver, pdev->id);
+ tty_unregister_device(goldfish_tty_driver, qtty->console.index);
iounmap(qtty->base);
qtty->base = NULL;
free_irq(qtty->irq, pdev);
@@ -324,11 +330,19 @@ static int goldfish_tty_remove(struct platform_device *pdev)
return 0;
}
+static const struct of_device_id goldfish_tty_of_match[] = {
+ { .compatible = "google,goldfish-tty", },
+ {},
+};
+
+MODULE_DEVICE_TABLE(of, goldfish_tty_of_match);
+
static struct platform_driver goldfish_tty_platform_driver = {
.probe = goldfish_tty_probe,
.remove = goldfish_tty_remove,
.driver = {
- .name = "goldfish_tty"
+ .name = "goldfish_tty",
+ .of_match_table = goldfish_tty_of_match,
}
};