This change adds a new API ufshcd_do_config_device() to
write configuration descriptor with the provisioning data.
Configfs support is added in driver to trigger ufs provisioning at
runtime. Provisioning data is parsed from vendor specific provisioning
file. This parsed data is passed as a buffer via configfs to provision
ufs device.
Changes since V3:
1)scsi: ufs: set the device reference clock setting
Updated logic to retain default ref_clk frequency setting
programmed in device in case if invalid value is passed via
devicetree setting.
Replaced of_property_read_u32() with device_property_read_u32().
Removed invalid checks.
2)scsi: ufs: Add ufs provisioning support
Added pm_runtime_get/put_sync and scsi_block/unblock_request
in runtime provisioning for stable operation.
3)scsi: ufs: Add configfs support for ufs provisioning
Updated Documentation with missing buffer entries required for
runtime provisioning. Used config option to support conditional
compilation for configfs api's.
Changes since V2:
Added configfs support for ufs provisioning and removed sysfs
support.
Changes since V1:
Added device tree entry to parse reference clock frequency
instead of hardcoding 19.2 MHz, as it can vary for different
vendors. Also removed setting ref_clk again during runtime
provisioning as it will be already set during probe.
Used get_unaligned_be*/put_unaligned_be* where applicable.
Changes since RFC:
Added check to avoid ufs runtime provisioning if
Configuration decriptor lock attribute is set to one.
Instead of parsing ref_clk frequency via device tree, used
correct enum ref_clk_freq value(19.2 Mhz for proviosioning).
Added config_descriptor sysfs entry to provision ufs and also
updated documentation for its correct usage.
Added more protection against bad data handling in sysfs code.
Sayali Lokhande (2):
scsi: ufs: Add ufs provisioning support
scsi: ufs: Add configfs support for ufs provisioning
Subhash Jadavani (1):
scsi: ufs: set the device reference clock setting
Documentation/ABI/testing/configfs-driver-ufs | 15 ++
.../devicetree/bindings/ufs/ufshcd-pltfrm.txt | 7 +
drivers/scsi/ufs/Makefile | 1 +
drivers/scsi/ufs/ufs-configfs.c | 198 +++++++++++++++
drivers/scsi/ufs/ufs.h | 39 +++
drivers/scsi/ufs/ufshcd-pltfrm.c | 2 +
drivers/scsi/ufs/ufshcd.c | 272 +++++++++++++++++++++
drivers/scsi/ufs/ufshcd.h | 22 ++
8 files changed, 556 insertions(+)
create mode 100644 Documentation/ABI/testing/configfs-driver-ufs
create mode 100644 drivers/scsi/ufs/ufs-configfs.c
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