drivers: clk: make API function description more consistent

Change inline description comments of clock framework API functions,
macros and structures to be more consistent.

Reviewed-by: Gatien Che

drivers: clk: make API function description more consistent

Change inline description comments of clock framework API functions,
macros and structures to be more consistent.

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

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drivers: clk: pre-enable new parent on clock re-parent

Add new clock flag CLK_SET_PARENT_PRE_ENABLE for when an already
enabled clock is re-parented and the new parent clock must be enabled
before w

drivers: clk: pre-enable new parent on clock re-parent

Add new clock flag CLK_SET_PARENT_PRE_ENABLE for when an already
enabled clock is re-parented and the new parent clock must be enabled
before we switch of parents.

This is needed for some system clocks that cannot be disabled, for
example an interconnect AXI bus clock or a CPU clock.

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

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drivers: clk: get linear rates description

Implement clk_get_rates_steps() clock API function to get the supported
clock rates description as a triplet min/max/step. This function can be
used in the

drivers: clk: get linear rates description

Implement clk_get_rates_steps() clock API function to get the supported
clock rates description as a triplet min/max/step. This function can be
used in the scope of SCMI communication where a clock can report a
linear rate list without listing all supported clock is an array
which size could be quite big.

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

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drivers: clk: enable clock on rate change

Add new clock flag CLK_SET_RATE_UNGATE for clocks that must be
enabled in order to change their rate.

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

drivers: clk: enable clock on rate change

Add new clock flag CLK_SET_RATE_UNGATE for clocks that must be
enabled in order to change their rate.

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

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drivers: clk: change parent clock rate if needed

Add clock flag CLK_SET_RATE_PARENT for clocks for which rate change
request must be propagated to the parent clock.

Reviewed-by: Gatien Chevallier <

drivers: clk: change parent clock rate if needed

Add clock flag CLK_SET_RATE_PARENT for clocks for which rate change
request must be propagated to the parent clock.

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

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drivers: clk: Get duty cycle from parent clock

Add CLK_DUTY_CYCLE_PARENT clock flag for clock which duty cycle
information needs to be retrieved for the clock parent.

Reviewed-by: Gatien Chevallier

drivers: clk: Get duty cycle from parent clock

Add CLK_DUTY_CYCLE_PARENT clock flag for clock which duty cycle
information needs to be retrieved for the clock parent.

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

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drivers: clk: Add clock duty cycle

Implement reading a clock duty cycle with new clock API function
clk_get_duty_cycle() and clock operation handle ::clk_get_duty_cycle.
When a clock does not provid

drivers: clk: Add clock duty cycle

Implement reading a clock duty cycle with new clock API function
clk_get_duty_cycle() and clock operation handle ::clk_get_duty_cycle.
When a clock does not provide the operation, it is assumed that the clock
has a 50% duty cycle.

Clock duty cycle information is used for example for some analog-digital
conversion peripheral. This new API function is also expected to be used
by SCMI clock service introduced in the SCMI specification v3.2 [1]
this allow to expose duty cycle service to SCMI clients.

Link: https://developer.arm.com/documentation/den0056/e/ [1]
Signed-off-by: Etienne Carriere <etienne.carriere@foss.st.com>
Signed-off-by: Gabriel Fernandez <gabriel.fernandez@foss.st.com>
Reviewed-by: Gatien Chevallier <gatien.chevallier@foss.st.com>

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dt-bindings: add RIFSC to default bindings config for STM32MP25

The RIFSC header is now part of default bindings header file for
STM32MP25.

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

dt-bindings: add RIFSC to default bindings config for STM32MP25

The RIFSC header is now part of default bindings header file for
STM32MP25.

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

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drivers: add stm32 RIFSC support

Add the RIFSC new driver support.

RIFSC (RIF Security Controller) is responsible for the isolation
of hardware resources like memory or peripherals. It is composed

drivers: add stm32 RIFSC support

Add the RIFSC new driver support.

RIFSC (RIF Security Controller) is responsible for the isolation
of hardware resources like memory or peripherals. It is composed of:

-RISC registers(slave peripherals) with RISUP(Resource Isolation
Slave Unit for Peripherals) OR RISAL(Resource Isolation Slave Unit
for Address space - Lite) logics.
-RIMC registers(Non RIF-Aware masters counterpart) with RIMU
(Resource Isolation Master Unit) logic. It is possible for a master to
inherit from its slave port(RISUP) configuration.

This driver parses the RIFSC device tree configuration and applies
it to put the firewall in place. Therefore, the device tree is
mandatory.

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

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dt-bindings: add RIF to default bindings config for stm32mp25

Add a list of default bindings for STM32MP25 platforms.

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

dt-bindings: add RIF to default bindings config for stm32mp25

Add a list of default bindings for STM32MP25 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: firewall: add stm32_rif driver for common RIF features

The resource isolation framework (RIF) is a comprehensive set of
hardware blocks designed to enforce and manage the isolation of
STM32

drivers: firewall: add stm32_rif driver for common RIF features

The resource isolation framework (RIF) is a comprehensive set of
hardware blocks designed to enforce and manage the isolation of
STM32MP25xx hardware resources, like memories and peripherals.

The RIF manages security and privilege levels as well as compartment
filtering. Each compartment is identified by a Compartment ID (CID).

Therefore, the access filtering can be, depending on the case:
• restricted to none, one or more than one CID
• secure-only, non-secure only, or both
• privileged-only or privileged/unprivileged
• read-only, write-only, or read/write

Add a firewall driver folder that contains firewall drivers.
This RIF driver contains generic features shared between all drivers
managing RIF configuration.

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

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core: serial: add rx_intr_{enable,disable}() callbacks

Add optional callbacks to enable and disable receive interrupts from a
serial device.

Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org

core: serial: add rx_intr_{enable,disable}() callbacks

Add optional callbacks to enable and disable receive interrupts from a
serial device.

Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
Reviewed-by: Jerome Forissier <jerome.forissier@linaro.org>

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drivers: atmel_rstc: add the function to control sama7g5's USB reset

In sama7g5, USB POR is controlled by register RSTC_GRSTR.

Signed-off-by: Tony Han <tony.han@microchip.com>
Acked-by: Jerome Fori

drivers: atmel_rstc: add the function to control sama7g5's USB reset

In sama7g5, USB POR is controlled by register RSTC_GRSTR.

Signed-off-by: Tony Han <tony.han@microchip.com>
Acked-by: Jerome Forissier <jerome.forissier@linaro.org>
Acked-by: Etienne Carriere <etienne.carriere@foss.st.com>

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plat-stm32mp1: shared_resource: disable MCKPROT if not needed

Disable RCC MCKPROT if not needed on STM32MP15 platforms to allow
non-secure world to control Cortex-M coprocessor. This change is neede

plat-stm32mp1: shared_resource: disable MCKPROT if not needed

Disable RCC MCKPROT if not needed on STM32MP15 platforms to allow
non-secure world to control Cortex-M coprocessor. This change is needed
when RCC secure hardening is enabled (RCC[TZEN] control bit) as it
also default enable RCC MCKPROT preventing non-secure world from
accessing some coprocessor SoC resources.

This change is needed when using in tree DTS files stm32mp15*-*-scmi.dts
and non-secure world is in charge of loading and managing the
remote processor firmware.

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

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drivers: i2c: add missing __unused in stubbed function

Fix statc inline stub implementation of i2c_dt_get_dev() that
lacks a __unused attribute on an unused argument.

Fixes: b357d34fe91f ("core: dt

drivers: i2c: add missing __unused in stubbed function

Fix statc inline stub implementation of i2c_dt_get_dev() that
lacks a __unused attribute on an unused argument.

Fixes: b357d34fe91f ("core: dt_driver: swap TEE_result and retrieved device reference")
Reviewed-by: Jens Wiklander <jens.wiklander@linaro.org>
Signed-off-by: Etienne Carriere <etienne.carriere@foss.st.com>

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drivers: nvmem: add API for nvmem controllers

Add a nvmem API to access nvmem cells using device-tree description. This
API allows to register nvmeme provider and obtain nvmem cells for consumer.
Mu

drivers: nvmem: add API for nvmem controllers

Add a nvmem API to access nvmem cells using device-tree description. This
API allows to register nvmeme provider and obtain nvmem cells for consumer.
Much like other subsystem, this one relies on the generic dt_driver
mechanism.

Signed-off-by: Clément Léger <clement.leger@bootlin.com>
Signed-off-by: Thomas Perrot <thomas.perrot@bootlin.com>
Reviewed-by: Etienne Carriere <etienne.carriere@foss.st.com>

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drivers: stm32_iwdg: remove stm32_iwdg_refresh()

Remove unused stm32_iwdg_refresh() intended to refresh all registered
watchdog devices.

Acked-by: Jerome Forissier <jerome.forissier@linaro.org>
Rev

drivers: stm32_iwdg: remove stm32_iwdg_refresh()

Remove unused stm32_iwdg_refresh() intended to refresh all registered
watchdog devices.

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

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drivers: clk_dt: include missing clk.h header file

clk resources are used in this file. Add missing include.

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

drivers: clk_dt: include missing clk.h header file

clk resources are used in this file. Add missing include.

Signed-off-by: Gatien Chevallier <gatien.chevallier@foss.st.com>
Acked-by: Jerome Forissier <jerome.forissier@linaro.org>
Acked-by: Jens Wiklander <jens.wiklander@linaro.org>

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drivers: Add stm32mp1 remoteproc driver

This driver is responsible for configuring the registers and memories of
the remote processor.
- It stores information about memories assigned to the remote p

drivers: Add stm32mp1 remoteproc driver

This driver is responsible for configuring the registers and memories of
the remote processor.
- It stores information about memories assigned to the remote processor
based on the device tree.
- It ensures consistency between the registered memory and the addresses
of the firmware segments to be loaded.
- Additionally, it is responsible for starting and stopping the remote
processor core.

Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
Reviewed-by: Etienne Carriere <etienne.carriere@foss.st.com>
Acked-by: Jerome Forissier <jerome.forissier@linaro.org>

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core: remove unused deprecated gic_cpu_init()

Remove the unused deprecated function gic_cpu_init().

Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
Reviewed-by: Etienne Carriere <etienne.

core: remove unused deprecated gic_cpu_init()

Remove the unused deprecated function gic_cpu_init().

Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
Reviewed-by: Etienne Carriere <etienne.carriere@foss.st.com>

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drivers: regulator: fix variable sized voltages fallback

Fix build issue reported by Clang on variable size field desc
not being located at the end of struct voltages_fallback. The
error was reporte

drivers: regulator: fix variable sized voltages fallback

Fix build issue reported by Clang on variable size field desc
not being located at the end of struct voltages_fallback. The
error was reported with a trace message like below:

core/include/drivers/regulator.h:118:4: warning: field 'voltages_fallback' with variable sized type 'struct voltages_fallback' not at the end of a struct or class is a GNU extension [-Wgnu-variable-sized-type-not-at-end]
} voltages_fallback;
^
core/drivers/regulator/regulator_fixed.c:27:19: warning: field 'regulator' with variable sized type 'struct regulator' not at the end of a struct or class is a GNU extension [-Wgnu-variable-sized-type-not-at-end]
struct regulator regulator;
^
2 warnings generated.

To achieve this the variable size field entries is removed from
struct regulator_voltages that is renamed struct regulator_voltages_desc.
API function regulator_supported_voltages() and regulator drivers handler
function ::supported_voltages are updated the get 2 input arguments the
second being the levels arrays which size is defined by the description
argument.

Impacted sources files are updated accordingly.

Fixes: 43c155ba111d ("drivers: regulator: list supported levels")
Acked-by: Jens Wiklander <jens.wiklander@linaro.org>
Signed-off-by: Etienne Carriere <etienne.carriere@foss.st.com>

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drivers: clk: print clock tree with debug trace level

Change clk_print_tree() to print the clock tree with debug trace
level instead of info trace level.

Add a test on TRACE_LEVEL >= TRACE_DEBUG in

drivers: clk: print clock tree with debug trace level

Change clk_print_tree() to print the clock tree with debug trace
level instead of info trace level.

Add a test on TRACE_LEVEL >= TRACE_DEBUG in clk_print_tree()
to ensures no unless code is embedded when the trace level is too low.

Reviewed-by: Jens Wiklander <jens.wiklander@linaro.org>
Signed-off-by: Etienne Carriere <etienne.carriere@foss.st.com>

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drivers: clk: clk_print_tree() stub for disabled CFG_DRIVERS_CLK

Add an stub implementation of clk_print_tree() when CFG_DRIVERS_CLK
is disabled. This allows generic code as the statistics PTA to no

drivers: clk: clk_print_tree() stub for disabled CFG_DRIVERS_CLK

Add an stub implementation of clk_print_tree() when CFG_DRIVERS_CLK
is disabled. This allows generic code as the statistics PTA to not
rely on #ifdef CFG_DRIVERS_CLK pragma.

Reviewed-by: Jens Wiklander <jens.wiklander@linaro.org>
Signed-off-by: Etienne Carriere <etienne.carriere@foss.st.com>

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drivers: clk: change queue from STAILQ to SLIST

Replace registered clock list from a STAILQ queue to a SLIST queue
that is enough for our purpose.

Reviewed-by: Jens Wiklander <jens.wiklander@linaro

drivers: clk: change queue from STAILQ to SLIST

Replace registered clock list from a STAILQ queue to a SLIST queue
that is enough for our purpose.

Reviewed-by: Jens Wiklander <jens.wiklander@linaro.org>
Signed-off-by: Etienne Carriere <etienne.carriere@foss.st.com>

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core: gic: add gic_init_donate_sgi_to_ns()

Adds gic_init_donate_sgi_to_ns() which changes a secure SGI to become
non-secure.

Secure world currently has a few SGIs to spare while normal world
typica

core: gic: add gic_init_donate_sgi_to_ns()

Adds gic_init_donate_sgi_to_ns() which changes a secure SGI to become
non-secure.

Secure world currently has a few SGIs to spare while normal world
typically have reserved each of the non-secure SGIs for different
purposes.

In case another non-secure SGI is needed secure world can donate one of
its unused SGIs. This configuration will then deviate from the standard
GIC configuration where SGI ID0-ID7 are non-secure and ID8-ID15 are
secure.

Platforms using gic_init_donate_sgi_to_ns() should also use
gic_init_per_cpu() instead of the deprecated gic_cpu_init().

Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
Reviewed-by: Etienne Carriere <etienne.carriere@foss.st.com>

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