Hi Li Jun,
On 2018-05-03 02:24, Li Jun wrote:
This patch adds 3 APIs to get the typec port power and data type,
and preferred power role by its name string.
Signed-off-by: Li Jun <jun.li@xxxxxxx>
---
drivers/usb/typec/class.c | 52 +++++++++++++++++++++++++++++++++++++++++++++++
include/linux/usb/typec.h | 3 +++
2 files changed, 55 insertions(+)
diff --git a/drivers/usb/typec/class.c b/drivers/usb/typec/class.c
index 53df10d..5981e18 100644
--- a/drivers/usb/typec/class.c
+++ b/drivers/usb/typec/class.c
@@ -9,6 +9,7 @@
#include <linux/device.h>
#include <linux/module.h>
#include <linux/mutex.h>
+#include <linux/property.h>
#include <linux/slab.h>
#include <linux/usb/typec.h>
#include <linux/usb/typec_mux.h>
@@ -802,6 +803,12 @@ static const char * const typec_port_types[] = {
[TYPEC_PORT_DRP] = "dual",
};
+static const char * const typec_data_types[] = {
+ [TYPEC_PORT_DFP] = "host",
+ [TYPEC_PORT_UFP] = "device",
+ [TYPEC_PORT_DRD] = "dual",
+};
+
static const char * const typec_port_types_drp[] = {
[TYPEC_PORT_SRC] = "dual [source] sink",
[TYPEC_PORT_SNK] = "dual source [sink]",
@@ -1252,6 +1259,51 @@ void typec_set_pwr_opmode(struct typec_port *port,
}
EXPORT_SYMBOL_GPL(typec_set_pwr_opmode);
+/**
+ * typec_find_power_type - Get the typec port power type
Why is this function called typec_find_power_type() and not typec_find_port_type()?
It's called port_type in sysfs, having different names just adds confusion.
(Otherwise I agree power_type is a better name but...)
+ * @name: port type string
+ *
+ * This routine is used to find the typec_port_type by its string name.
+ *
+ * Returns typec_port_type if success, otherwise negative error code.
+ */
+int typec_find_power_type(const char *name)
+{
+ return match_string(typec_port_types, ARRAY_SIZE(typec_port_types),
+ name);
+}
+EXPORT_SYMBOL_GPL(typec_find_power_type);
+
+/**
+ * typec_find_preferred_role - Find the typec drp port preferred power role
Why typec_find_preferred_role()? Could be used for any power_role so
why not typec_find_power_role()?
BR // Mats
+ * @name: power role string
+ *
+ * This routine is used to find the typec_role by its string name of
+ * preferred power role(Try.SRC or Try.SNK).
+ *
+ * Returns typec_role if success, otherwise negative error code.
+ */
+int typec_find_preferred_role(const char *name)
+{
+ return match_string(typec_roles, ARRAY_SIZE(typec_roles), name);
+}
+EXPORT_SYMBOL_GPL(typec_find_preferred_role);
+
+/**
+ * typec_find_data_type - Get the typec port data capability
+ * @name: data type string
+ *
+ * This routine is used to find the typec_port_data by its string name.
+ *
+ * Returns typec_port_data if success, otherwise negative error code.
+ */
+int typec_find_data_type(const char *name)
+{
+ return match_string(typec_data_types, ARRAY_SIZE(typec_data_types),
+ name);
+}
+EXPORT_SYMBOL_GPL(typec_find_data_type);
+
/* ------------------------------------------ */
/* API for Multiplexer/DeMultiplexer Switches */
diff --git a/include/linux/usb/typec.h b/include/linux/usb/typec.h
index 672b39b..00c93e7 100644
--- a/include/linux/usb/typec.h
+++ b/include/linux/usb/typec.h
@@ -267,4 +267,7 @@ int typec_set_orientation(struct typec_port *port,
enum typec_orientation orientation);
int typec_set_mode(struct typec_port *port, int mode);
+int typec_find_power_type(const char *name);
+int typec_find_preferred_role(const char *name);
+int typec_find_data_type(const char *name);
#endif /* __LINUX_USB_TYPEC_H */
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