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authorAlistair Popple <alistair@popple.id.au>2015-05-15 14:06:39 +1000
committerMichael Ellerman <mpe@ellerman.id.au>2015-05-22 15:14:38 +1000
commit2def86a7200ca3a9828926eef927a89adb82ce32 (patch)
tree0a1d9c2225617fea111b47e6c8639ecc6e0c9f99 /drivers/tty/hvc
parentdce143c3381c355ef73be3dd97cf3ca1b15359b8 (diff)
hvc: Convert to using interrupts instead of opal events
Convert the opal hvc driver to use the new irqchip to register for opal events. As older firmware versions may not have device tree bindings for the interrupt parent we just use a hardcoded hwirq based on the event number. Signed-off-by: Alistair Popple <alistair@popple.id.au> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'drivers/tty/hvc')
-rw-r--r--drivers/tty/hvc/hvc_opal.c33
1 files changed, 10 insertions, 23 deletions
diff --git a/drivers/tty/hvc/hvc_opal.c b/drivers/tty/hvc/hvc_opal.c
index 543b234e70fc..47b54c6aefd2 100644
--- a/drivers/tty/hvc/hvc_opal.c
+++ b/drivers/tty/hvc/hvc_opal.c
@@ -29,6 +29,7 @@
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/export.h>
+#include <linux/interrupt.h>
#include <asm/hvconsole.h>
#include <asm/prom.h>
@@ -61,7 +62,6 @@ static struct hvc_opal_priv *hvc_opal_privs[MAX_NR_HVC_CONSOLES];
/* For early boot console */
static struct hvc_opal_priv hvc_opal_boot_priv;
static u32 hvc_opal_boot_termno;
-static bool hvc_opal_event_registered;
static const struct hv_ops hvc_opal_raw_ops = {
.get_chars = opal_get_chars,
@@ -162,28 +162,15 @@ static const struct hv_ops hvc_opal_hvsi_ops = {
.tiocmset = hvc_opal_hvsi_tiocmset,
};
-static int hvc_opal_console_event(struct notifier_block *nb,
- unsigned long events, void *change)
-{
- if (events & OPAL_EVENT_CONSOLE_INPUT)
- hvc_kick();
- return 0;
-}
-
-static struct notifier_block hvc_opal_console_nb = {
- .notifier_call = hvc_opal_console_event,
-};
-
static int hvc_opal_probe(struct platform_device *dev)
{
const struct hv_ops *ops;
struct hvc_struct *hp;
struct hvc_opal_priv *pv;
hv_protocol_t proto;
- unsigned int termno, boot = 0;
+ unsigned int termno, irq, boot = 0;
const __be32 *reg;
-
if (of_device_is_compatible(dev->dev.of_node, "ibm,opal-console-raw")) {
proto = HV_PROTOCOL_RAW;
ops = &hvc_opal_raw_ops;
@@ -227,18 +214,18 @@ static int hvc_opal_probe(struct platform_device *dev)
dev->dev.of_node->full_name,
boot ? " (boot console)" : "");
- /* We don't do IRQ ... */
- hp = hvc_alloc(termno, 0, ops, MAX_VIO_PUT_CHARS);
+ irq = opal_event_request(ilog2(OPAL_EVENT_CONSOLE_INPUT));
+ if (!irq) {
+ pr_err("hvc_opal: Unable to map interrupt for device %s\n",
+ dev->dev.of_node->full_name);
+ return irq;
+ }
+
+ hp = hvc_alloc(termno, irq, ops, MAX_VIO_PUT_CHARS);
if (IS_ERR(hp))
return PTR_ERR(hp);
dev_set_drvdata(&dev->dev, hp);
- /* ... but we use OPAL event to kick the console */
- if (!hvc_opal_event_registered) {
- opal_notifier_register(&hvc_opal_console_nb);
- hvc_opal_event_registered = true;
- }
-
return 0;
}