Add new method hsi_add_clients_from_dt, which can be used
to initialize HSI clients from a device tree node.
The function currently only registers the generic hsi_char
device, which is the only one available in the Linux kernel.
Support for loading generic hsi clients will be added once
a common binding has been specified for them.
Signed-off-by: Sebastian Reichel <sre@xxxxxxxxxx>
---
drivers/hsi/hsi.c | 32 +++++++++++++++++++++++++++++++-
include/linux/hsi/hsi.h | 2 ++
2 files changed, 33 insertions(+), 1 deletion(-)
diff --git a/drivers/hsi/hsi.c b/drivers/hsi/hsi.c
index 749f7b5..6fde590 100644
--- a/drivers/hsi/hsi.c
+++ b/drivers/hsi/hsi.c
@@ -26,8 +26,14 @@
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/notifier.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
#include "hsi_core.h"
+static struct hsi_board_info hsi_char_dev_info = {
+ .name = "hsi_char",
+};
+
static ssize_t modalias_show(struct device *dev,
struct device_attribute *a __maybe_unused, char *buf)
{
@@ -50,7 +56,13 @@ static int hsi_bus_uevent(struct device *dev, struct kobj_uevent_env *env)
static int hsi_bus_match(struct device *dev, struct device_driver *driver)
{
- return strcmp(dev_name(dev), driver->name) == 0;
+ if (of_driver_match_device(dev, driver))
+ return true;
+
+ if (strcmp(dev_name(dev), driver->name) == 0)
+ return true;
+
+ return false;
}
static struct bus_type hsi_bus_type = {
@@ -101,6 +113,24 @@ static void hsi_scan_board_info(struct hsi_controller *hsi)
}
}
+static void hsi_add_client_from_dt(struct hsi_port *port,
+ struct device_node *client)
+{
+ /* TODO */
+}
+
+void hsi_add_clients_from_dt(struct hsi_port *port, struct device_node *clients)
+{
+ struct device_node *child;
+
+ /* register hsi-char device */
+ hsi_new_client(port, &hsi_char_dev_info);
+
+ for_each_available_child_of_node(clients, child)
+ hsi_add_client_from_dt(port, child);
+}
+EXPORT_SYMBOL_GPL(hsi_add_clients_from_dt);
+
static int hsi_remove_client(struct device *dev, void *data __maybe_unused)
{
device_unregister(dev);
diff --git a/include/linux/hsi/hsi.h b/include/linux/hsi/hsi.h
index 0dca785..fb07339 100644
--- a/include/linux/hsi/hsi.h
+++ b/include/linux/hsi/hsi.h
@@ -282,6 +282,8 @@ struct hsi_controller *hsi_alloc_controller(unsigned int n_ports, gfp_t flags);
void hsi_put_controller(struct hsi_controller *hsi);
int hsi_register_controller(struct hsi_controller *hsi);
void hsi_unregister_controller(struct hsi_controller *hsi);
+void hsi_add_clients_from_dt(struct hsi_port *port,
+ struct device_node *clients);
static inline void hsi_controller_set_drvdata(struct hsi_controller *hsi,
void *data)
--
1.9.0
--
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