Current serial device driver has the common sysfs I/F for all serial
devices, but it does not have device specific sysfs I/F. To make device
specific sysfs I/F, this patch introduces device specific attribute group to
uart_port structure.
Changes in V8:
- Divide this patch from V7's patch based on Greg's comment
Signed-off-by: Yoshihiro YUNOMAE <yoshihiro.yunomae.ez@xxxxxxxxxxx>
---
drivers/tty/serial/serial_core.c | 18 +++++++++++-------
include/linux/serial_core.h | 4 ++++
2 files changed, 15 insertions(+), 7 deletions(-)
diff --git a/drivers/tty/serial/serial_core.c b/drivers/tty/serial/serial_core.c
index b68550d..524cb49 100644
--- a/drivers/tty/serial/serial_core.c
+++ b/drivers/tty/serial/serial_core.c
@@ -2552,15 +2552,16 @@ static struct attribute *tty_dev_attrs[] = {
NULL,
};
-static const struct attribute_group tty_dev_attr_group = {
+static struct attribute_group tty_dev_attr_group = {
.attrs = tty_dev_attrs,
};
-static const struct attribute_group *tty_dev_attr_groups[] = {
- &tty_dev_attr_group,
- NULL
- };
-
+static void make_uport_attr_grps(struct uart_port *uport)
+{
+ uport->attr_grps[0] = &tty_dev_attr_group;
+ if (uport->dev_spec_attr_group)
+ uport->attr_grps[1] = uport->dev_spec_attr_group;
+}
/**
* uart_add_one_port - attach a driver-defined port structure
@@ -2611,12 +2612,15 @@ int uart_add_one_port(struct uart_driver *drv, struct uart_port *uport)
uart_configure_port(drv, state, uport);
+ make_uport_attr_grps(uport);
+
/*
* Register the port whether it's detected or not. This allows
* setserial to be used to alter this port's parameters.
*/
tty_dev = tty_port_register_device_attr(port, drv->tty_driver,
- uport->line, uport->dev, port, tty_dev_attr_groups);
+ uport->line, uport->dev, port,
+ (const struct attribute_group **)uport->attr_grps);
if (likely(!IS_ERR(tty_dev))) {
device_set_wakeup_capable(tty_dev, 1);
} else {
diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h
index f729be9..7e3122f 100644
--- a/include/linux/serial_core.h
+++ b/include/linux/serial_core.h
@@ -113,6 +113,8 @@ struct uart_icount {
typedef unsigned int __bitwise__ upf_t;
+#define MAX_ATTR_GRPS 3
+
struct uart_port {
spinlock_t lock; /* port lock */
unsigned long iobase; /* in/out[bwl] */
@@ -195,6 +197,8 @@ struct uart_port {
unsigned int line; /* port index */
resource_size_t mapbase; /* for ioremap */
struct device *dev; /* parent device */
+ struct attribute_group *dev_spec_attr_group; /* specific attribute */
+ struct attribute_group *attr_grps[MAX_ATTR_GRPS];/* all attr. groups */
unsigned char hub6; /* this should be in the 8250 driver */
unsigned char suspended;
unsigned char irq_wake;
--
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