pinctrl: renesas: r8a7778: Add LBSC pins, groups, and functions

Add pins, groups, and functions for the Local Bus State Controller
(LBSC) on the Renesas R-Car M1A (R8A7778) SoC.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/347b9f7627871b45aec04a3351d50219d4d260fe.1694768311.git.geert+renesas@glider.be

pinctrl: renesas: Annotate sentinels in tables

It does not make sense to have a comma after a sentinel, as any new
elements must be added before the sentinel. Hence drop all such commas.

Add comments to clarify the purpose of the empty elements.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/845f1d8285dd44522af1b0f429d4c6bd4759eb9e.1678272180.git.geert+renesas@glider.be

pinctrl: renesas: r8a7778: Use shorthands for reserved fields

Replace the full descriptions of reserved register fields by shorthands
with a negative field width, and merge adjacent reserved fields.

This reduces kernel size by 142 bytes.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/1af5225c81ac871a461f7d824619275e2e0ed8df.1649865241.git.geert+renesas@glider.be

pinctrl: renesas: r8a7778: Share SDHI pin group data

Pin group sdhi0_data1 is a subset of sdhi0_data4.
Pin groups sdhi[12]_data1_[ab] are subsets of sdhi[12]_data4_[ab].

This reduces kernel size by 40 bytes.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/997df5b8a01657ede685c0869d73e4d6b71dce26.1640269757.git.geert+renesas@glider.be

pinctrl: renesas: r8a7778: Share MMC pin group data

Pin groups mmc_data[14] are subsets of mmc_data8.

This reduces kernel size by 40 bytes.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/d3bf7dfda2952a0265171f82024931d490d9178a.1640269757.git.geert+renesas@glider.be

pinctrl: renesas: r8a7778: Remove unused PORT_GP_PUP_1() macro

The last user was removed in commit dd1f760bffcee2c5 ("pinctrl: sh-pfc:
r8a7778: Use common PORT_GP_CFG_27() macro").

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Link: https://lore.kernel.org/r/129147ac57f5e931cc7108db0a6483b803a1b8f4.1619785375.git.geert+renesas@glider.be

pinctrl: renesas: Move R-Car bias helpers to sh_pfc.h

The Renesas Pin Function Controller driver uses two header files:
- sh_pfc.h, for use by both core code and SoC-specific drivers,
- core.h, for internal use by the core code only.

Hence move the R-Car bias helper declarations from core.h to sh_pfc.h,
and drop the inclusion of core.h from SoC-specific drivers that no
longer need it.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Link: https://lore.kernel.org/r/20210303132619.3938128-3-geert+renesas@glider.be

pinctrl: renesas: r8a7778: Use common R-Car bias handling

Currently, the rcar_pinmux_[gs]et_bias() helpers handle only SoCs that
have separate LSI Pin Pull-Enable (PUEN) and Pull-Up/Down Control (PUD)
registers, like R-Car Gen3 and RZ/G2. Update the function to handle
SoCs that have only LSI Pin Pull-Up Control Register (PUPR), like R-Car
Gen1/Gen2 and RZ/G1.

Reduce code duplication by converting the R-Car M1A pin control driver
to use the common handler.

Note that this changes behavior in case the (invalid!) option
"bias-pull-down" is used in an R-Car M1A DTS: before, it was ignored
silently; after this change, it is considered the same as
"bias-pull-up".

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20201028151637.1734130-8-geert+renesas@glider.be

pinctrl: renesas: r8a7778: Use physical addresses for PUPR regs

The handling of the LSI Pin Pull-Up Control Registers (PUPR) on R-Car
M1A uses register offsets instead of register physical addresses.
This is different from the handling on other R-Car parts.

Convert the bias handling from register offsets to physical addresses.
This increases uniformity, and prepares for consolidation of the bias
handling.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20201028151637.1734130-7-geert+renesas@glider.be

pinctrl: Rename sh-pfc to renesas

The drivers/pinctrl/sh-pfc subdirectory was originally created to group
pin control drivers for various Renesas SuperH and SH-Mobile platforms.
However, the name "sh-pfc" no longer reflects its contents, as the
directory now contains pin control drivers for Renesas SuperH, ARM32,
and ARM64 SoCs.

Hence rename the subdirectory from drivers/pinctrl/sh-pfc to
drivers/pinctrl/renesas, and the related Kconfig symbol from
PINCTRL_SH_PFC to PINCTRL_RENESAS.

Rename the git branch in MAINTAINERS, too, for consistency.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20200909131534.12897-3-geert+renesas@glider.be