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77e18969da
To get the address that needs to be read/written for specific port
functionalities, the P(), PM(), PMC(), PFC(), PIN(), IOLH() IEN(),
ISEL() macros are used. Some of these macros receive as argument the
hardware port identifier, some the hardware port offset address (e.g.
ISEL() received port identifier, IOLH() received port offset address).
This makes it hard to extend the current driver for SoCs where port
identifiers are not contiguous in the memory map of the pin controller.
This is the case for the RZ/G3S pin controller where ports are mapped as
follows:
port offset port identifier
----------- ---------------
0x20 P0
0x21 P5
0x22 P6
0x23 P11
0x24 P12
0x25 P13
0x26 P14
0x27 P15
0x28 P16
0x29 P17
0x2a P18
0x30 P1
0x31 P2
0x32 P3
0x33 P4
0x34 P7
0x35 P8
0x36 P8
0x37 P10
To make this achievable, change all the above macros used to get the
address of a port register for a specific port functionality based on
the port hardware address. Summarized, all the above macros will get as
argument the port offset address listed in the above table.
With this RZG2L_SINGLE_PIN_GET_PORT_OFFSET(),
RZG2L_PIN_ID_TO_PORT_OFFSET() and RZG2L_GPIO_PORT_GET_INDEX() were
replaced by RZG2L_PIN_CFG_TO_PORT_OFFSET(); RZG2L_SINGLE_PIN_GET_CFGS()
and RZG2L_GPIO_PORT_GET_CFGS() were replaced by RZG2L_PIN_CFG_TO_CAPS().
Also rzg2l_pinctrl_set_pfc_mode() does not need the port argument
anymore. Also rzg2l_gpio_direction_input() and
rzg2l_gpio_direction_output() do not need to translate port and bit
locally as this can be done by rzg2l_gpio_set_direction().
To use the same naming for port, bit/pin, and register offset, replace
the port_offset variable names in different places by variables named
off. There is no longer a need to initialize cfg and bit in different
code places.
Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Tested-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://lore.kernel.org/r/20230929053915.1530607-15-claudiu.beznea@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.