Fix spelling errors in comments.

Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Signed-off-by: Igor Opaniuk <igor.opaniuk@gmail.com>

Change optee driver service enumeration to not enumerate (and
allocate a zero sized shared memory buffer) when OP-TEE
reports that there is no service to enumerate.

This change fixes an existing issue that occurs when the such zero
sized shared memory buffer allocated from malloc() has a physical
address of offset 0 of a physical 4kB page. In such case, OP-TEE
secure world refuses to register the zero-sized shared memory
area and makes U-Boot optee service enumeration to fail.

Fixes: 94ccfb78a4d6 ("drivers: tee: optee: discover OP-TEE services")
Signed-off-by: Etienne Carriere <etienne.carriere@foss.st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>
Reviewed-by: Jens Wiklander <jens.wiklander@linaro.org>

Change optee probe function to only warn when service enumeration
sequence fails instead of reporting an optee driver probe failure.
Indeed U-Boot can still use OP-TEE even if some OP-TEE services are
not discovered.

Fixes: 94ccfb78a4d6 ("drivers: tee: optee: discover OP-TEE services")
Signed-off-by: Etienne Carriere <etienne.carriere@foss.st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>
Reviewed-by: Jens Wiklander <jens.wiklander@linaro.org>

Fix and document the Secure Channel Protocol03 emulator.

Fixes: 5a8783c80c39 ("drivers: tee: sandbox: SCP03 control emulator")

Signed-off-by: Jorge Ramirez-Ortiz <jorge@foundries.io>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>

When comparing UUIDs for discovered services we only compare up to the
ptr size instead of the entire UUID

Fixes: 94ccfb78a4d61 ("drivers: tee: optee: discover OP-TEE services")
Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Reviewed-by: Etienne Carriere <etienne.carriere@linaro.org>
Reviewed-by: Jens Wiklander <jens.wiklander@linaro.org>

If we fail to probe the optee-rng device, we print a wrong message
referring to the firmware tpm.

Fixes: 476a3d58dfeb ("tee: optee: don't fail probe because of optee-rng")
Reviewed-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Reviewed-by: Etienne Carriere <etienne.carriere@linaro.org>
Reviewed-by: Jens Wiklander <jens.wiklander@linaro.org>
Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>

In U-Boot driver model the devices can be referenced by
phandle in the U-Boot configuration nodes.

Without a valid node provided during the bind, the driver
associated to OP-TEE TA can't be referenced.

For example to force the sequence number with alias
(.flags = DM_UC_FLAG_SEQ_ALIAS)

 	aliases {
		rng0 = &optee;
 	};

or other configuration:

board-sysinfo {
   compatible = "vendor,sysinfo-board";
   ramdom = <&optee>;
}

With this patch all drivers bound from OP-TEE service
discovery are now associated are associated to OP-TEE
node, allowing to identify by phandle the driver
provided by the TA for one UCLASS without modifying
device tree.

Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>

Makes OP-TEE to enumerate also services depending on tee-supplicant
support in U-Boot. This change allows OP-TEE services like fTPM TA
to be discovered and get a TPM device registered in U-Boot.

Signed-off-by: Etienne Carriere <etienne.carriere@linaro.org>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Reviewed-by: Jens Wiklander <jens.wiklander@linaro.org>
Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>

Fixes optee-rng driver bind sequence in optee driver to print a warning
message but not report an error status when a optee-rng service driver
fails to be bound as the optee driver itself is still fully functional.

Signed-off-by: Etienne Carriere <etienne.carriere@linaro.org>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Reviewed-by: Jens Wiklander <jens.wiklander@linaro.org>
Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>

We currently have an if_type (interface type) and a uclass id. These are
closely related and we don't need to have both.

Drop the if_type values and use the uclass ones instead.

Maintain the existing, subtle, one-way conversion between UCLASS_USB and
UCLASS_MASS_STORAGE for now, and add a comment.

Signed-off-by: Simon Glass <sjg@chromium.org>