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authorMagnus Damm <damm@igel.co.jp>2009-01-21 15:13:42 +0000
committerPaul Mundt <lethal@linux-sh.org>2009-05-08 22:50:47 +0900
commite552de2413edad1a7b0c7f82a2f2753e4f905d93 (patch)
tree45ecd6a536d17318c9b9f279a81d9cbe2a7bd17d /drivers/serial/sh-sci.c
parent7b551f9daa9bd9533ba4ce31622ed4be1dd97d3e (diff)
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sh-sci: add platform device private data
This patch adds per-platform private data to the sh-sci driver. Signed-off-by: Magnus Damm <damm@igel.co.jp> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'drivers/serial/sh-sci.c')
-rw-r--r--drivers/serial/sh-sci.c127
1 files changed, 85 insertions, 42 deletions
diff --git a/drivers/serial/sh-sci.c b/drivers/serial/sh-sci.c
index 728d6a062bf6..af5da110d52b 100644
--- a/drivers/serial/sh-sci.c
+++ b/drivers/serial/sh-sci.c
@@ -47,6 +47,7 @@
#include <linux/clk.h>
#include <linux/ctype.h>
#include <linux/err.h>
+#include <linux/list.h>
#ifdef CONFIG_SUPERH
#include <asm/clock.h>
@@ -78,6 +79,16 @@ struct sci_port {
/* Port clock */
struct clk *clk;
#endif
+ struct list_head node;
+};
+
+struct sh_sci_priv {
+ spinlock_t lock;
+ struct list_head ports;
+
+#ifdef CONFIG_HAVE_CLK
+ struct notifier_block clk_nb;
+#endif
};
#ifdef CONFIG_SERIAL_SH_SCI_CONSOLE
@@ -726,19 +737,22 @@ static irqreturn_t sci_mpxed_interrupt(int irq, void *ptr)
static int sci_notifier(struct notifier_block *self,
unsigned long phase, void *p)
{
- int i;
+ struct sh_sci_priv *priv = container_of(self,
+ struct sh_sci_priv, clk_nb);
+ struct sci_port *sci_port;
+ unsigned long flags;
if ((phase == CPUFREQ_POSTCHANGE) ||
- (phase == CPUFREQ_RESUMECHANGE))
- for (i = 0; i < SCI_NPORTS; i++) {
- struct sci_port *s = &sci_ports[i];
- s->port.uartclk = clk_get_rate(s->clk);
- }
+ (phase == CPUFREQ_RESUMECHANGE)) {
+ spin_lock_irqsave(&priv->lock, flags);
+ list_for_each_entry(sci_port, &priv->ports, node)
+ sci_port->port.uartclk = clk_get_rate(sci_port->clk);
+
+ spin_unlock_irqrestore(&priv->lock, flags);
+ }
return NOTIFY_OK;
}
-
-static struct notifier_block sci_nb = { &sci_notifier, NULL, 0 };
#endif
static int sci_request_irq(struct sci_port *port)
@@ -1201,6 +1215,27 @@ static struct uart_driver sci_uart_driver = {
.cons = SCI_CONSOLE,
};
+
+static int __devexit sci_remove(struct platform_device *dev)
+{
+ struct sh_sci_priv *priv = platform_get_drvdata(dev);
+ struct sci_port *p;
+ unsigned long flags;
+
+#ifdef CONFIG_HAVE_CLK
+ cpufreq_unregister_notifier(&priv->clk_nb, CPUFREQ_TRANSITION_NOTIFIER);
+#endif
+
+ spin_lock_irqsave(&priv->lock, flags);
+ list_for_each_entry(p, &priv->ports, node)
+ uart_remove_one_port(&sci_uart_driver, &p->port);
+
+ spin_unlock_irqrestore(&priv->lock, flags);
+
+ kfree(priv);
+ return 0;
+}
+
/*
* Register a set of serial devices attached to a platform device. The
* list is terminated with a zero flags entry, which means we expect
@@ -1210,7 +1245,22 @@ static struct uart_driver sci_uart_driver = {
static int __devinit sci_probe(struct platform_device *dev)
{
struct plat_sci_port *p = dev->dev.platform_data;
+ struct sh_sci_priv *priv;
int i, ret = -EINVAL;
+ unsigned long flags;
+
+ priv = kzalloc(sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ INIT_LIST_HEAD(&priv->ports);
+ spin_lock_init(&priv->lock);
+ platform_set_drvdata(dev, priv);
+
+#ifdef CONFIG_HAVE_CLK
+ priv->clk_nb.notifier_call = sci_notifier;
+ cpufreq_register_notifier(&priv->clk_nb, CPUFREQ_TRANSITION_NOTIFIER);
+#endif
for (i = 0; p && p->flags != 0; p++, i++) {
struct sci_port *sciport = &sci_ports[i];
@@ -1254,12 +1304,19 @@ static int __devinit sci_probe(struct platform_device *dev)
memcpy(&sciport->irqs, &p->irqs, sizeof(p->irqs));
- uart_add_one_port(&sci_uart_driver, &sciport->port);
- }
+ ret = uart_add_one_port(&sci_uart_driver, &sciport->port);
-#ifdef CONFIG_HAVE_CLK
- cpufreq_register_notifier(&sci_nb, CPUFREQ_TRANSITION_NOTIFIER);
-#endif
+ if (ret && (p->flags & UPF_IOREMAP)) {
+ iounmap(p->membase);
+ goto err_unreg;
+ }
+
+ INIT_LIST_HEAD(&sciport->node);
+
+ spin_lock_irqsave(&priv->lock, flags);
+ list_add(&sciport->node, &priv->ports);
+ spin_unlock_irqrestore(&priv->lock, flags);
+ }
#ifdef CONFIG_SH_STANDARD_BIOS
sh_bios_gdb_detach();
@@ -1268,50 +1325,36 @@ static int __devinit sci_probe(struct platform_device *dev)
return 0;
err_unreg:
- for (i = i - 1; i >= 0; i--)
- uart_remove_one_port(&sci_uart_driver, &sci_ports[i].port);
-
+ sci_remove(dev);
return ret;
}
-static int __devexit sci_remove(struct platform_device *dev)
-{
- int i;
-
-#ifdef CONFIG_HAVE_CLK
- cpufreq_unregister_notifier(&sci_nb, CPUFREQ_TRANSITION_NOTIFIER);
-#endif
-
- for (i = 0; i < SCI_NPORTS; i++)
- uart_remove_one_port(&sci_uart_driver, &sci_ports[i].port);
-
- return 0;
-}
-
static int sci_suspend(struct platform_device *dev, pm_message_t state)
{
- int i;
+ struct sh_sci_priv *priv = platform_get_drvdata(dev);
+ struct sci_port *p;
+ unsigned long flags;
- for (i = 0; i < SCI_NPORTS; i++) {
- struct sci_port *p = &sci_ports[i];
+ spin_lock_irqsave(&priv->lock, flags);
+ list_for_each_entry(p, &priv->ports, node)
+ uart_suspend_port(&sci_uart_driver, &p->port);
- if (p->type != PORT_UNKNOWN && p->port.dev == &dev->dev)
- uart_suspend_port(&sci_uart_driver, &p->port);
- }
+ spin_unlock_irqrestore(&priv->lock, flags);
return 0;
}
static int sci_resume(struct platform_device *dev)
{
- int i;
+ struct sh_sci_priv *priv = platform_get_drvdata(dev);
+ struct sci_port *p;
+ unsigned long flags;
- for (i = 0; i < SCI_NPORTS; i++) {
- struct sci_port *p = &sci_ports[i];
+ spin_lock_irqsave(&priv->lock, flags);
+ list_for_each_entry(p, &priv->ports, node)
+ uart_resume_port(&sci_uart_driver, &p->port);
- if (p->type != PORT_UNKNOWN && p->port.dev == &dev->dev)
- uart_resume_port(&sci_uart_driver, &p->port);
- }
+ spin_unlock_irqrestore(&priv->lock, flags);
return 0;
}