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hvc: Convert to using interrupts instead of opal events

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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>
This commit is contained in:
Alistair Popple 2015-05-15 14:06:39 +10:00 committed by Michael Ellerman
parent dce143c338
commit 2def86a720
1 changed files with 10 additions and 23 deletions
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33
drivers/tty/hvc/hvc_opal.c
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@ -29,6 +29,7 @@
#include <linux/of.h> #include <linux/of.h>
#include <linux/of_platform.h> #include <linux/of_platform.h>
#include <linux/export.h> #include <linux/export.h>
#include <linux/interrupt.h>
#include <asm/hvconsole.h> #include <asm/hvconsole.h>
#include <asm/prom.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 */ /* For early boot console */
static struct hvc_opal_priv hvc_opal_boot_priv; static struct hvc_opal_priv hvc_opal_boot_priv;
static u32 hvc_opal_boot_termno; static u32 hvc_opal_boot_termno;
static bool hvc_opal_event_registered;
static const struct hv_ops hvc_opal_raw_ops = { static const struct hv_ops hvc_opal_raw_ops = {
.get_chars = opal_get_chars, .get_chars = opal_get_chars,
@ -162,28 +162,15 @@ static const struct hv_ops hvc_opal_hvsi_ops = {
.tiocmset = hvc_opal_hvsi_tiocmset, .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) static int hvc_opal_probe(struct platform_device *dev)
{ {
const struct hv_ops *ops; const struct hv_ops *ops;
struct hvc_struct *hp; struct hvc_struct *hp;
struct hvc_opal_priv *pv; struct hvc_opal_priv *pv;
hv_protocol_t proto; hv_protocol_t proto;
unsigned int termno, boot = 0; unsigned int termno, irq, boot = 0;
const __be32 *reg; const __be32 *reg;
if (of_device_is_compatible(dev->dev.of_node, "ibm,opal-console-raw")) { if (of_device_is_compatible(dev->dev.of_node, "ibm,opal-console-raw")) {
proto = HV_PROTOCOL_RAW; proto = HV_PROTOCOL_RAW;
ops = &hvc_opal_raw_ops; ops = &hvc_opal_raw_ops;
@ -227,18 +214,18 @@ static int hvc_opal_probe(struct platform_device *dev)
dev->dev.of_node->full_name, dev->dev.of_node->full_name,
boot ? " (boot console)" : ""); boot ? " (boot console)" : "");
/* We don't do IRQ ... */ irq = opal_event_request(ilog2(OPAL_EVENT_CONSOLE_INPUT));
hp = hvc_alloc(termno, 0, ops, MAX_VIO_PUT_CHARS); 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)) if (IS_ERR(hp))
return PTR_ERR(hp); return PTR_ERR(hp);
dev_set_drvdata(&dev->dev, 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; return 0;
} }