spi: pl022: expose internal fifo flush API

We identified that the caller of the pl022 driver needs to flush the
pl022's internal fifo to make sure next transaction starts clean.

This PR expose exis

spi: pl022: expose internal fifo flush API

We identified that the caller of the pl022 driver needs to flush the
pl022's internal fifo to make sure next transaction starts clean.

This PR expose existing pl022_flush_fifo API to caller via spi_ops.

The validation is performed on bcm platform.

Signed-off-by: Vahid Dukandar <vahidd@microsoft.com>
Reviewed-by: Victor Chong <victor.chong@linaro.org>

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Remove 'All rights reserved' from Linaro files

The text 'All rights reserved' is useless [1]. The Free Software
Foundation's REUSE Initiative best practices document [2] does not
contain these words

Remove 'All rights reserved' from Linaro files

The text 'All rights reserved' is useless [1]. The Free Software
Foundation's REUSE Initiative best practices document [2] does not
contain these words. Therefore, we can safely remove the text from the
files that are owned by Linaro.

Generated by:
spdxify.py --linaro-only --strip-arr optee_os/

Link: [1] https://en.wikipedia.org/wiki/All_rights_reserved
Link: [2] https://reuse.software/practices/
Link: [3] https://github.com/jforissier/misc/blob/f7b56c8/spdxify.py
Signed-off-by: Jerome Forissier <jerome.forissier@linaro.org>
Acked-by: Joakim Bech <joakim.bech@linaro.org>

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Remove license notice from Linaro files

Now that we have added SPDX identifiers, we can safely remove the
verbose license text from the files that are owned by Linaro.

Generated by [1]:
spdxify.p

Remove license notice from Linaro files

Now that we have added SPDX identifiers, we can safely remove the
verbose license text from the files that are owned by Linaro.

Generated by [1]:
spdxify.py --linaro-only --strip-license-text optee_os/

Link: [1] https://github.com/jforissier/misc/blob/f7b56c8/spdxify.py
Signed-off-by: Jerome Forissier <jerome.forissier@linaro.org>
Acked-by: Joakim Bech <joakim.bech@linaro.org>

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Add SPDX license identifiers

Adds one SPDX-License-Identifier line [1] to each source files that
contains license text.

Generated by [2]:
spdxify.py --add-spdx optee_os/

The scancode tool [3] wa

Add SPDX license identifiers

Adds one SPDX-License-Identifier line [1] to each source files that
contains license text.

Generated by [2]:
spdxify.py --add-spdx optee_os/

The scancode tool [3] was used to double check the license matching
code in the Python script. All the licenses detected by scancode are
either detected by spdxify.py, or have no SPDX identifier, or are false
matches.

Link: [1] https://spdx.org/licenses/
Link: [2] https://github.com/jforissier/misc/blob/f7b56c8/spdxify.py
Link: [3] https://github.com/nexB/scancode-toolkit
Signed-off-by: Jerome Forissier <jerome.forissier@linaro.org>
Acked-by: Joakim Bech <joakim.bech@linaro.org>

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drivers: spi: Make configure, start and end functions generic

Move configure, start and end functions from IP specific files into
spi_ops in spi.h to allow platforms to call and control them via
the

drivers: spi: Make configure, start and end functions generic

Move configure, start and end functions from IP specific files into
spi_ops in spi.h to allow platforms to call and control them via
the generic framework.

Signed-off-by: Victor Chong <victor.chong@linaro.org>
Reviewed-by: Jerome Forissier <jerome.forissier@linaro.org>
Reviewed-by: Etienne Carriere <etienne.carriere@linaro.org>
[jf: rebase on top of master]
Signed-off-by: Jerome Forissier <jerome.forissier@linaro.org>

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drivers: pl022: Add more checks and configuration

- Add checks for proper data size before packet transfer
- Check also busy status before exiting rx loop to avoid possible
endless looping
- Clear

drivers: pl022: Add more checks and configuration

- Add checks for proper data size before packet transfer
- Check also busy status before exiting rx loop to avoid possible
endless looping
- Clear interrupts during configure

Signed-off-by: Victor Chong <victor.chong@linaro.org>
Reviewed-by: Jerome Forissier <jerome.forissier@linaro.org>
Reviewed-by: Etienne Carriere <etienne.carriere@linaro.org>
[jf: rebase on top of master]
Signed-off-by: Jerome Forissier <jerome.forissier@linaro.org>

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drivers: spi: simplify code

1. SPI mandates that sizes of transmitted and received packet are of same
size [1]. As discussed in [2], this means that *num_rxpkts != num_txpkts
is not a valid use case

drivers: spi: simplify code

1. SPI mandates that sizes of transmitted and received packet are of same
size [1]. As discussed in [2], this means that *num_rxpkts != num_txpkts
is not a valid use case so there's no need for both and we can just merge
them and use num_pkts.

2. Remove tx{8,16} and rx{8,16} only functions as these are not
commonly used. If necessary, users can call just txrx{8,16} with
rdat or wdat as NULL for tx{8,16} and rx{8,16} respectively as
replacements. E.g.:

tx8:
txrx8(chip, wdat, NULL, num_pkts);

rx16:
txrx16(chip, NULL, rdat, num_pkts);

3. Remove unnecessary or repetitive enums and headers and line feeds

[1] http://www.quanser.com/products/quarc/documentation/spi_protocol.html
[2] https://github.com/OP-TEE/optee_os/pull/1215

Signed-off-by: Victor Chong <victor.chong@linaro.org>
Reviewed-by: Jerome Forissier <jerome.forissier@linaro.org>
Reviewed-by: Etienne Carriere <etienne.carriere@linaro.org>
[jf: rebase on top of master]
Signed-off-by: Jerome Forissier <jerome.forissier@linaro.org>

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drivers: add spi framework and pl022 driver

Signed-off-by: Victor Chong <victor.chong@linaro.org>
Reviewed-by: etienne carriere <etienne.carriere@linaro.org>
Reviewed-by: Jens Wiklander <jens.wiklan

drivers: add spi framework and pl022 driver

Signed-off-by: Victor Chong <victor.chong@linaro.org>
Reviewed-by: etienne carriere <etienne.carriere@linaro.org>
Reviewed-by: Jens Wiklander <jens.wiklander@linaro.org>
Reviewed-by: Jerome Forissier <jerome.forissier@linaro.org>

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