plat/stm32mp1: fdt helpers for secure aware gpio bank ...

New helper functions to get GPIO banks configuration from the FDT.

stm32_get_gpio_bank_pinctrl_node() allows stm32mp platforms to
differentiate specific GPIO banks when these are defined with a specific
path in the FDT.

fdt_get_gpio_bank_pin_count() returns the number of pins in a GPIO bank
as it depends on the SoC variant.

Change-Id: I4481774152b3c6bf35bf986f58e357c2f9c19176
Signed-off-by: Etienne Carriere <etienne.carriere@st.com>

plat/stm32: Use generic fdt_get_stdout_node_offset() ...

Now that we have an implementation for getting the node offset of the
stdout-path property in the generic fdt_wrappers code, use that to
replace the current ST platform specific implementation.

Change-Id: I5dd05684e7ca3cb563b5f71c885e1066393e057e
Signed-off-by: Andre Przywara <andre.przywara@arm.com>

plat/stm32: Use generic fdt_get_reg_props_by_name() ...

The STM32 platform port parse DT nodes to find base address to
peripherals. It does this by using its own implementation, even though
this functionality is generic and actually widely useful outside of the
STM32 code.

Re-implement fdt_get_reg_props_by_name() on top of the newly introduced
fdt_get_reg_props_by_index() function, and move it to fdt_wrapper.c.
This is removes the assumption that #address-cells and #size-cells are
always one.

Change-Id: I6d584930262c732b6e0356d98aea50b2654f789d
Signed-off-by: Andre Przywara <andre.przywara@arm.com>

plat/stm32: Implement fdt_read_uint32_default() as a wrapper ...

The STM32 platform code uses its own set of FDT helper functions,
although some of them are fairly generic.

Remove the implementation of fdt_read_uint32_default() and implement it
on top of the newly introduced fdt_read_uint32() function, then convert
all users over.

This also fixes two callers, which were slightly abusing the "default"
semantic.

Change-Id: I570533362b4846e58dd797a92347de3e0e5abb75
Signed-off-by: Andre Przywara <andre.przywara@arm.com>

plat/stm32: Use generic fdt_read_uint32_array() implementation ...

The device tree parsing code for the STM32 platform is using its own FDT
helper functions, some of them being rather generic.
In particular the existing fdt_read_uint32_array() implementation is now
almost identical to the new generic code in fdt_wrappers.c, so we can
remove the ST specific version and adjust the existing callers.

Compared to the original ST implementation the new version takes a
pointer to the DTB as the first argument, and also swaps the order of
the number of cells and the pointer.

Change-Id: Id06b0f1ba4db1ad1f733be40e82c34f46638551a
Signed-off-by: Andre Przywara <andre.przywara@arm.com>

plat/st: correctly check pwr-regulators node ...

This warning was issued by cppcheck in our downstream code:
[plat/st/common/stm32mp_dt.c:629] -> [plat/st/common/stm32mp_dt.c:634]:
 (warning) Identical condition 'node<0', second condition is always false

The second test has to check variable pwr_regulators_node.

Change-Id: I4a20c4a3ac0ef0639c2df36309d90a61c02b511f
Signed-off-by: Yann Gautier <yann.gautier@st.com>

plat/st: correct static analysis tool warning ...

Correct the following sparse warnings:
plat/st/common/stm32mp_dt.c:103:5: warning:
 symbol 'fdt_get_node_parent_address_cells' was not declared.
 Should it be static?
plat/st/common/stm32mp_dt.c:123:5: warning:
 symbol 'fdt_get_node_parent_size_cells' was not declared.
 Should it be static?

As those 2 functions are only used by assert(), put them under
ENABLE_ASSERTIONS flag.

Change-Id: Iad721f12128df83a3de3f53e7920a9c1dce64c56
Signed-off-by: Yann Gautier <yann.gautier@st.com>

stm32mp: add DT helper for reg by name ...

Add a new entry to find register properties by name and
include new assert functions to limit address cells to 1
and size cells to 1.

Change-Id: Ide59a795a05fb2af36bd07fec15e5a3adf196226
Signed-off-by: Lionel Debieve <lionel.debieve@st.com>

stm32mp1: make dt_get_stdout_node_offset() static ...

Do not export function dt_get_stdout_node_offset() that is used only inside
stm32mp_dt.c source file.

Change-Id: I9dd3dbfab21d42ed81c68723e71fe5a7586dce93
Signed-off-by: Yann Gautier <yann.gautier@st.com>

stm32mp1: add general SYSCFG management ...

The system configuration controller is mainly used to manage
the compensation cell and other IOs and system related settings.

The SYSCFG driver is in charge of configuring masters on the interconnect,
IO compensation, low voltage boards, or pull-ups for boot pins.
All other configurations should be handled in Linux drivers requiring it.

Device tree files are also updated to manage vdd-supply regulator.

Change-Id: I10fb513761a7d1f2b7afedca9c723ad9d1bccf42
Signed-off-by: Nicolas Le Bayon <nicolas.le.bayon@st.com>
Signed-off-by: Yann Gautier <yann.gautier@st.com>

stm32mp1: use functions to retrieve some peripheral addresses ...

PWR, RCC, DDRPHYC & DDRCTRL addresses can be retrieved from device tree.
Platform asserts the value read from the DT are the SoC addresses.

Change-Id: I43f0890b51918a30c87ac067d3780ab27a0f59de
Signed-off-by: Yann Gautier <yann.gautier@st.com>
Signed-off-by: Etienne Carriere <etienne.carriere@st.com>
Signed-off-by: Nicolas LE BAYON <nicolas.le.bayon@st.com>

stm32mp1: remove some dependencies on clocks and reset in drivers ...

Include all RCC, clocks and reset headers from stm32mp1_def.h
which if exported to the firmware through platform_def.h.
The same dependency removal is done in common code as well.
Some useless includes are also removed in stm32_sdmmc2 driver.

Change-Id: I731ea5775c3fdb7f7b0c388b93923ed5e84b8d3f
Signed-off-by: Yann Gautier <yann.gautier@st.com>

stm32mp1: make functions and macros more common ...

Mainly remove suffix 1 from prefix stm32mp1 in several macros and functions
that can be used in drivers shared by different platforms.

Change-Id: I2295c44f5b1edac7e80a93c0e8dfd671b36e88e7
Signed-off-by: Yann Gautier <yann.gautier@st.com>
Signed-off-by: Etienne Carriere <etienne.carriere@st.com>

stm32mp1: split code between common and private parts ...

Some parts of code could be shared with platform derivatives,
or new platforms.
A new folder plat/st/common is created to put common parts.

stm32mp_common.h is a common API aggregate.

Remove some casts where applicable.
Fix some types where applicable.
Remove also some platform includes that are already in stm32mp1_def.h.

Change-Id: I46d763c8d9e15732d1ee7383207fd58206d7f583
Signed-off-by: Yann Gautier <yann.gautier@st.com>
Signed-off-by: Etienne Carriere <etienne.carriere@st.com>