drivers: firewall: stm32_etzpc: remove header file

Remove stm32_etzpc.h header file that is not required since the
declared and defined resources are used internally in stm32_etzpc.c

By the way, al

drivers: firewall: stm32_etzpc: remove header file

Remove stm32_etzpc.h header file that is not required since the
declared and defined resources are used internally in stm32_etzpc.c

By the way, also remove inclusion of stm32mp15-etzpc.h DT bindings
header file from stm32_rng.c where it is not needed.

Signed-off-by: Etienne Carriere <etienne.carriere@foss.st.com>
Acked-by: Gatien Chevallier <gatien.chevallier@foss.st.com>

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drivers: stm32_rng: remove registering to shared_resources driver

Remove registering of STM32 RNG driver to shared_resources driver that
is deprecated since integration of the firewall framework and

drivers: stm32_rng: remove registering to shared_resources driver

Remove registering of STM32 RNG driver to shared_resources driver that
is deprecated since integration of the firewall framework and will soon
be removed.

Signed-off-by: Etienne Carriere <etienne.carriere@foss.st.com>
Reviewed-by: Gatien Chevallier <gatien.chevallier@foss.st.com>

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drivers: stm32_rng: embed ETZPC functions when CFG_STM32_ETZPC is set

On platforms when CFG_STM32_ETZPC is disabled, ETZPC cannot be
interrogated to get decprot attributes. Therefore do not embed ET

drivers: stm32_rng: embed ETZPC functions when CFG_STM32_ETZPC is set

On platforms when CFG_STM32_ETZPC is disabled, ETZPC cannot be
interrogated to get decprot attributes. Therefore do not embed ETZPC
related code.

While there, revert commit 326382a059a8 ("drivers: stm32_rng: MP15 RNG is
non-secure when PRNG is enable") and prefer to use ETZPC API.

Signed-off-by: Gatien Chevallier <gatien.chevallier@foss.st.com>
Fixes: d773ec0baf4c ("drivers: stm32_rng: update clock and power management")
Reviewed-by: Etienne Carriere <etienne.carriere@foss.st.com>

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dt-bindings: add platform specific ETZPC bindings

Define ETZPC bindings for STM32MP15 and STM32MP13 and add these
header files into the stm32mp_dt_bindings helper. While there, also
update some incl

dt-bindings: add platform specific ETZPC bindings

Define ETZPC bindings for STM32MP15 and STM32MP13 and add these
header files into the stm32mp_dt_bindings helper. While there, also
update some includes to fix the path errors.

Signed-off-by: Gatien Chevallier <gatien.chevallier@foss.st.com>
Reviewed-by: Etienne Carriere <etienne.carriere@foss.st.com>

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drivers: stm32_rng: MP15 RNG is non-secure when PRNG is enable

Register stm32_rng device as non-secure when software PRNG is enabled
instead of testing the firewall configuration that is applied fro

drivers: stm32_rng: MP15 RNG is non-secure when PRNG is enable

Register stm32_rng device as non-secure when software PRNG is enabled
instead of testing the firewall configuration that is applied from
stm32mp1_init_final_shres() at driver_init_late initcall level, far
after RNG initialization.

Fixes: d773ec0baf4c ("drivers: stm32_rng: update clock and power management")
Signed-off-by: Etienne Carriere <etienne.carriere@foss.st.com>
Acked-by: Gatien Chevallier <gatien.chevallier@foss.st.com>

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drivers: stm32_rng: update clock and power management

Better handle clock and reset resources by implementing
enable_rng_clock()/disable_rng_clock(). Do not implement a PM callback
if OP-TEE runs wi

drivers: stm32_rng: update clock and power management

Better handle clock and reset resources by implementing
enable_rng_clock()/disable_rng_clock(). Do not implement a PM callback
if OP-TEE runs with a software RNG. Finally, implement shared resource
management only for stm32mp15x platforms as it is not used on other
platforms.

Signed-off-by: Gatien Chevallier <gatien.chevallier@foss.st.com>
Reviewed-by: Etienne Carriere <etienne.carriere@foss.st.com>

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drivers: stm32_rng: use default PRNG init if RNG is disabled in the DT

In case RNG peripheral is not enabled in device tree, fallback to the
default RNG initialization implementation.

Signed-off-by

drivers: stm32_rng: use default PRNG init if RNG is disabled in the DT

In case RNG peripheral is not enabled in device tree, fallback to the
default RNG initialization implementation.

Signed-off-by: Thomas Bourgoin <thomas.bourgoin@foss.st.com>
Acked-by: Jens Wiklander <jens.wiklander@linaro.org>
Acked-by: Jerome Forissier <jerome.forissier@linaro.org>
Reviewed-by: Etienne Carriere <etienne.carriere@foss.st.com>

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drivers: stm32_rng: remove use of CFG_PM

Remove use of CFG_PM from STM32 RNG driver since this configuration
switch is not defined in OP-TEE OS.

Reviewed-by: Gatien Chevallier <gatien.chevallier@fo

drivers: stm32_rng: remove use of CFG_PM

Remove use of CFG_PM from STM32 RNG driver since this configuration
switch is not defined in OP-TEE OS.

Reviewed-by: Gatien Chevallier <gatien.chevallier@foss.st.com>
Signed-off-by: Etienne Carriere <etienne.carriere@foss.st.com>

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drivers: stm32_rng: print RNG version at driver probe time

Print the RNG version that is read from RNG_VERR at driver probe time.

Signed-off-by: Gatien Chevallier <gatien.chevallier@foss.st.com>
Re

drivers: stm32_rng: print RNG version at driver probe time

Print the RNG version that is read from RNG_VERR at driver probe time.

Signed-off-by: Gatien Chevallier <gatien.chevallier@foss.st.com>
Reviewed-by: Etienne Carriere <etienne.carriere@foss.st.com>

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drivers: stm32_rng: put max noise freq in compatible data

Define max noise clock frequency in the compatible data structure.
This avoids having configuration flags in the driver.

While there, updat

drivers: stm32_rng: put max noise freq in compatible data

Define max noise clock frequency in the compatible data structure.
This avoids having configuration flags in the driver.

While there, update STM32MP13/15 max RNG clock frequency to 48MHz
to align with latest certifications.

Signed-off-by: Gatien Chevallier <gatien.chevallier@foss.st.com>
Reviewed-by: Etienne Carriere <etienne.carriere@foss.st.com>

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drivers: stm32_rng: move RNG configuration to compat data

Register values cannot be part of the device tree.
As choosing another RNG configuration that is not the default
NIST-certified one should b

drivers: stm32_rng: move RNG configuration to compat data

Register values cannot be part of the device tree.
As choosing another RNG configuration that is not the default
NIST-certified one should be uncommon, it is acceptable to define
it in the compatible data and require to re-compile OP-TEE to change
the RNG configuration.

Also adds support for RNG V4.1 and above. These versions have a power
optimization and a modification of the seed error concealment. New
health tests and noise source registers are configurable and are part
of the RNG configuration.

Signed-off-by: Gatien Chevallier <gatien.chevallier@foss.st.com>
Reviewed-by: Etienne Carriere <etienne.carriere@foss.st.com>

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drivers: stm32_rng: add stm32mp25 support

Add stm32mp25 platform support in stm32_rng driver.
On this platform, a security clock is shared between some hardware
blocks. For the RNG, it is the RNG ke

drivers: stm32_rng: add stm32mp25 support

Add stm32mp25 platform support in stm32_rng driver.
On this platform, a security clock is shared between some hardware
blocks. For the RNG, it is the RNG kernel clock. Therefore, the
clock gate is no more shared between the RNG bus and kernel clocks as
on STM32MP1x platforms and the bus clock has to be managed on its own.

Define the number of clock in the compatible data.

Signed-off-by: Gatien Chevallier <gatien.chevallier@foss.st.com>
Reviewed-by: Etienne Carriere <etienne.carriere@foss.st.com>

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drivers: stm32_rng: ensure conditional reset sequence is done

Add a check on RNG_CR_CONDRST being cleared before continuing the
program to ensure that the conditional reset sequence is done.

Signed

drivers: stm32_rng: ensure conditional reset sequence is done

Add a check on RNG_CR_CONDRST being cleared before continuing the
program to ensure that the conditional reset sequence is done.

Signed-off-by: Gatien Chevallier <gatien.chevallier@foss.st.com>
Reviewed-by: Etienne Carriere <etienne.carriere@foss.st.com>

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drivers: stm32_rng: fix comment in stm32_rng_pm_resume()

Fix comment about the application of the RNG configuration in
stm32_rng_pm_resume(). Old comment mentioned reserved bits.

Signed-off-by: Gat

drivers: stm32_rng: fix comment in stm32_rng_pm_resume()

Fix comment about the application of the RNG configuration in
stm32_rng_pm_resume(). Old comment mentioned reserved bits.

Signed-off-by: Gatien Chevallier <gatien.chevallier@foss.st.com>
Reviewed-by: Etienne Carriere <etienne.carriere@foss.st.com>

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drivers: stm32_rng: remove __unused attribute

Removes a useless __unused attribute for stm32_rng_probe() argument.

Signed-off-by: Gatien Chevallier <gatien.chevallier@foss.st.com>
Reviewed-by: Etie

drivers: stm32_rng: remove __unused attribute

Removes a useless __unused attribute for stm32_rng_probe() argument.

Signed-off-by: Gatien Chevallier <gatien.chevallier@foss.st.com>
Reviewed-by: Etienne Carriere <etienne.carriere@foss.st.com>

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drivers: stm32_rng: check clock enable call

Fixes clock enable request that does not check the return value.

Signed-off-by: Gatien Chevallier <gatien.chevallier@foss.st.com>
Reviewed-by: Etienne Ca

drivers: stm32_rng: check clock enable call

Fixes clock enable request that does not check the return value.

Signed-off-by: Gatien Chevallier <gatien.chevallier@foss.st.com>
Reviewed-by: Etienne Carriere <etienne.carriere@foss.st.com>

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drivers: stm32_rng: fix case when RNG is not ready

Checks RNG data ready status bit before each read of a 32bit
sample from the RNG FIFO. Indeed the data ready status bit tells that
the RNG FIFO con

drivers: stm32_rng: fix case when RNG is not ready

Checks RNG data ready status bit before each read of a 32bit
sample from the RNG FIFO. Indeed the data ready status bit tells that
the RNG FIFO contains random bytes by burst of 32bit word,
not by burst of 4 32bit words.

Acked-by: Jerome Forissier <jerome.forissier@linaro.org>
Acked-by: Jens Wiklander <jens.wiklander@linaro.org>
Signed-off-by: Etienne Carriere <etienne.carriere@foss.st.com>

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core: replace _fdt_ prefix with fdt_ for device tree API

As per upstream discussion, there is no reason to keep _fdt_ prefix.
Replaces it with fdt_ for all occurrences.

Signed-off-by: Gatien Cheval

core: replace _fdt_ prefix with fdt_ for device tree API

As per upstream discussion, there is no reason to keep _fdt_ prefix.
Replaces it with fdt_ for all occurrences.

Signed-off-by: Gatien Chevallier <gatien.chevallier@foss.st.com>
Reviewed-by: Etienne Carriere <etienne.carriere@linaro.org>

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drivers: stm32_*: remove code for when DT is not supported

This change removes implementation managing cases when CFG_EMBED_DTB or
CFG_DT are disabled. This change aims to simplify source files and

drivers: stm32_*: remove code for when DT is not supported

This change removes implementation managing cases when CFG_EMBED_DTB or
CFG_DT are disabled. This change aims to simplify source files and is
related to commit [1] from which stm32mp1 platform requires DTB for the
drivers configuration.

Link: [1] 474ad1856b56 ("plat-stm32mp1: conf: mandate the use of device tree on STM32MP1x platforms")
Acked-by: Jerome Forissier <jerome.forissier@linaro.org>
Acked-by: Gatien Chevallier <gatien.chevallier@foss.st.com>
Signed-off-by: Etienne Carriere <etienne.carriere@linaro.org>

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drivers: stm32_rng: make stm32_rng_read() static

Reading a random number should be done via the generic API.

Makes stm32_rng_read() static as it is unused in other files and remove
stm32_rng.h, whi

drivers: stm32_rng: make stm32_rng_read() static

Reading a random number should be done via the generic API.

Makes stm32_rng_read() static as it is unused in other files and remove
stm32_rng.h, which is now empty.

Signed-off-by: Gatien Chevallier <gatien.chevallier@foss.st.com>
Reviewed-by: Etienne Carriere <etienne.carriere@linaro.org>

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drivers: stm32_rng: override plat_rng_init() if hardware RNG

Avoids useless operations by overriding plat_rng_init() and do nothing.

Signed-off-by: Gatien Chevallier <gatien.chevallier@foss.st.com>

drivers: stm32_rng: override plat_rng_init() if hardware RNG

Avoids useless operations by overriding plat_rng_init() and do nothing.

Signed-off-by: Gatien Chevallier <gatien.chevallier@foss.st.com>
Reviewed-by: Etienne Carriere <etienne.carriere@linaro.org>

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drivers: stm32_rng: implement late seed error detection

As per STM32MP1x specification, rare seed error conditions must be
considered when random value read from DR register is zero.

Signed-off-by:

drivers: stm32_rng: implement late seed error detection

As per STM32MP1x specification, rare seed error conditions must be
considered when random value read from DR register is zero.

Signed-off-by: Gatien Chevallier <gatien.chevallier@foss.st.com>
Reviewed-by: Etienne Carriere <etienne.carriere@linaro.org>

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drivers: stm32_rng: pm callbacks

Implements power management (suspend/resume) functions in stm32_rng
driver.

Signed-off-by: Gatien Chevallier <gatien.chevallier@foss.st.com>
Reviewed-by: Etienne Ca

drivers: stm32_rng: pm callbacks

Implements power management (suspend/resume) functions in stm32_rng
driver.

Signed-off-by: Gatien Chevallier <gatien.chevallier@foss.st.com>
Reviewed-by: Etienne Carriere <etienne.carriere@linaro.org>

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drivers: stm32_rng: support clock error detection

Adds clock error detection configuration when the clock-error-detect
property is set in the RNG node in the device tree.

Signed-off-by: Gatien Chev

drivers: stm32_rng: support clock error detection

Adds clock error detection configuration when the clock-error-detect
property is set in the RNG node in the device tree.

Signed-off-by: Gatien Chevallier <gatien.chevallier@foss.st.com>
Reviewed-by: Etienne Carriere <etienne.carriere@linaro.org>

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drivers: stm32_rng: support conditional reset

Implements a RNG variant error concealment named conditional reset
that requires a software sequence before RNG being able to deliver
again random bytes

drivers: stm32_rng: support conditional reset

Implements a RNG variant error concealment named conditional reset
that requires a software sequence before RNG being able to deliver
again random bytes. It is supported by STM32MP13

RNG peripherals that are supporting conditional reset can dynamically
customize their configuration. Adds support for RNG clock frequency
restraint and NIST configuration.

Signed-off-by: Gatien Chevallier <gatien.chevallier@foss.st.com>
Reviewed-by: Etienne Carriere <etienne.carriere@linaro.org>

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