drivers:misc: ti-st: move from rfkill to sysfs

The communication between ST KIM and UIM was interfaced
over the /dev/rfkill device node.
Move the interface to a simpler less abusive sysfs entry
mechanism and document it in Documentation/ABI/testing/
under sysfs-platform-kim.

Shared transport driver would now read the UART details
originally received by bootloader or firmware as platform
data.
The data read will be shared over sysfs entries for the user-space
UIM or other n/w manager/plugins to be read, and assist the driver
by opening up the UART, setting the baud-rate and installing the
line discipline.

Signed-off-by: Pavan Savoy <pavan_savoy@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 17 insertions, 2 deletions

diff --git a/include/linux/ti_wilink_st.h b/include/linux/ti_wilink_st.h
index 1674ca7ab86d..010cda7287a0 100644
--- a/include/linux/ti_wilink_st.h
+++ b/include/linux/ti_wilink_st.h
@@ -206,8 +206,8 @@ void gps_chrdrv_stub_init(void);
 /* time in msec to wait for
  * line discipline to be installed
  */
-#define LDISC_TIME      500
-#define CMD_RESP_TIME   500
+#define LDISC_TIME      1000
+#define CMD_RESP_TIME   800
 #define MAKEWORD(a, b)  ((unsigned short)(((unsigned char)(a)) \
         | ((unsigned short)((unsigned char)(b))) << 8))
 
@@ -230,6 +230,7 @@ struct chip_version {
         unsigned short maj_ver;
 };
 
+#define UART_DEV_NAME_LEN 32
 /**
  * struct kim_data_s - the KIM internal data, embedded as the
  *      platform's drv data. One for each ST device in the system.
@@ -271,6 +272,10 @@ struct kim_data_s {
         enum proto_type rf_protos[ST_MAX_CHANNELS];
         struct st_data_s *core_data;
         struct chip_version version;
+        unsigned char ldisc_install;
+        unsigned char dev_name[UART_DEV_NAME_LEN];
+        unsigned char flow_cntrl;
+        unsigned long baud_rate;
 };
 
 /**
@@ -413,4 +418,14 @@ struct gps_event_hdr {
         u16 plen;
 } __attribute__ ((packed));
 
+/* platform data */
+struct ti_st_plat_data {
+        long gpios[ST_MAX_CHANNELS]; /* BT, FM and GPS */
+        unsigned char dev_name[UART_DEV_NAME_LEN]; /* uart name */
+        unsigned char flow_cntrl; /* flow control flag */
+        unsigned long baud_rate;
+        int (*suspend)(struct platform_device *, pm_message_t);
+        int (*resume)(struct platform_device *);
+};
+
 #endif /* TI_WILINK_ST_H */