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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>
49 lines
1.9 KiB
Plaintext
49 lines
1.9 KiB
Plaintext
What: /sys/devices/platform/kim/dev_name
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Date: January 2010
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KernelVersion: 2.6.38
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Contact: "Pavan Savoy" <pavan_savoy@ti.com>
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Description:
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Name of the UART device at which the WL128x chip
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is connected. example: "/dev/ttyS0".
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The device name flows down to architecture specific board
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initialization file from the SFI/ATAGS bootloader
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firmware. The name exposed is read from the user-space
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dameon and opens the device when install is requested.
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What: /sys/devices/platform/kim/baud_rate
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Date: January 2010
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KernelVersion: 2.6.38
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Contact: "Pavan Savoy" <pavan_savoy@ti.com>
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Description:
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The maximum reliable baud-rate the host can support.
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Different platforms tend to have different high-speed
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UART configurations, so the baud-rate needs to be set
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locally and also sent across to the WL128x via a HCI-VS
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command. The entry is read and made use by the user-space
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daemon when the ldisc install is requested.
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What: /sys/devices/platform/kim/flow_cntrl
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Date: January 2010
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KernelVersion: 2.6.38
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Contact: "Pavan Savoy" <pavan_savoy@ti.com>
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Description:
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The WL128x makes use of flow control mechanism, and this
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entry most often should be 1, the host's UART is required
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to have the capability of flow-control, or else this
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entry can be made use of for exceptions.
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What: /sys/devices/platform/kim/install
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Date: January 2010
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KernelVersion: 2.6.38
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Contact: "Pavan Savoy" <pavan_savoy@ti.com>
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Description:
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When one of the protocols Bluetooth, FM or GPS wants to make
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use of the shared UART transport, it registers to the shared
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transport driver, which will signal the user-space for opening,
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configuring baud and install line discipline via this sysfs
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entry. This entry would be polled upon by the user-space
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daemon managing the UART, and is notified about the change
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by the sysfs_notify. The value would be '1' when UART needs
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to be opened/ldisc installed, and would be '0' when UART
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is no more required and needs to be closed.
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