pinctrl: renesas: Fix spaces followed by tabs

Perform 's@ \t@\t\t@g' so we wouldn't have spaces followed by tabs.
No functional change.

Picked from U-Boot commit 0cf207ec01c ("WS cleanup: remove SPACE(s) followed by TAB")

Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20230507130120.7587-1-marek.vasut+renesas@mailbox.org
Signed-off-by: Geert Uytterhoeven <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: r8a77970: Add support for AVB power-source

Add support for configuring the I/O voltage level of the Ethernet AVB
pins on the R-Car V3M SoC. "PIN_VDDQ_AVB0" can be configured for 2.5V
or 3.3V operation.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/eb4db82bdeb67507a1a77f63b9d90280d6f38ba4.1678271030.git.geert+renesas@glider.be

pinctrl: renesas: rcar: Phase out old SH_PFC_PIN_CFG_IO_VOLTAGE flag

Commit 537db25ca330dce0 ("pinctrl: renesas: Add I/O voltage level
flag") introduced new flags to support pins that can switch their
voltage levels between either 1.8V and 3.3V, or between 2.5V and 3.3V.
The old SH_PFC_PIN_CFG_IO_VOLTAGE flag was retained to avoid having to
change existing drivers.

Replace SH_PFC_PIN_CFG_IO_VOLTAGE by SH_PFC_PIN_CFG_IO_VOLTAGE_18_33, to
make the voltage configuration explicit, and to prepare for the advent
of support for more voltage levels.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/ae5f879c093f3e3cd50ba1495975bccfad81237b.1678271030.git.geert+renesas@glider.be

pinctrl: renesas: r8a77970: Optimize fixed-width reserved fields

Describe registers with fixed-width register fields and many reserved
fields using the PINMUX_CFG_REG_VAR() macro, as the latter supports a
shorthand not requiring dummy values.

This reduces kernel size by 268 bytes.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/33dd9bc41df888f132e2e6921d2ff38225b68105.1649865241.git.geert+renesas@glider.be

pinctrl: renesas: r8a77970: 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 164 bytes.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/f2dda82454bb1b0c97f842de2c9fa68da05ef3e6.1649865241.git.geert+renesas@glider.be

pinctrl: renesas: Remove unused pfc parameter from .pin_to_pocctrl()

The pfc parameter of the .pin_to_pocctrl() method was never used.
It is a relic of the old I/O voltage handling before commit
8775306dcf48092f ("pinctrl: sh-pfc: refactor voltage setting").

Remove the parameter, as it prevents the checker from calling this
function for validating consistency of the pin control tables.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/822133086f32618c7fc920123c6a96f5d4ea7ad6.1640270559.git.geert+renesas@glider.be

pinctrl: renesas: r8a77970: Share RPC pin group data

Pin groups qspi[01]_data[24] are subsets of rpc_data.
Pin group rpc_clk1 is a subset of rpc_clk2.

This reduces kernel size by 104 bytes.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/a71da3daa818a33c1e81bff07d643d3f30ff1b7d.1640269757.git.geert+renesas@glider.be

pinctrl: renesas: r8a77970: 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/9354645f58c12a275923046fe913cfc9602ca710.1640269757.git.geert+renesas@glider.be

pinctrl: renesas: Add generic support for resizable buses

The VIN_DATA_PIN_GROUP() macro and vin_data{12,16,} unions are used to
define multiple VIN data groups with different numbers of lanes, while
referring to a single array of data pins, thus saving memory.

However, the same feature would be useful for other resizable buses,
like MMC, SDHI, QSPI, LCD, BSC, ...

Rework the mechanism for generic use:
- Use the new SH_PFC_PIN_GROUP_SUBSET() helper to remove the need for
bus-specific unions,
- Rename VIN_DATA_PIN_GROUP() to BUS_DATA_PIN_GROUP(),
- Rename the macro parameters to better reflect their purposes,
- Move the macro up, where it belongs.

Update all individual pin control drivers for the above changes.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/cccfcfd01eb8ab7a587b084c4ddbf97293bd7291.1640269757.git.geert+renesas@glider.be

pinctrl: renesas: Rename sh_pfc_soc_operations instances

Some instances of struct sh_pfc_soc_operations are called
"<soc>_pfc_ops", others are called "<soc>_pinmux_ops" or just
"pinmux_ops". Settle on the first variant, to avoid confusion with
"struct pinmux_ops" in the pinctrl core, and to increase consistency.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/2ab33ad1d6a20a57d16922678b78810fa55b7fc0.1640269757.git.geert+renesas@glider.be

pinctrl: renesas: r8a77970: Add bias pinconf support

Implement support for pull-up (most pins, excl. DU_DOTCLKIN and EXTALR)
and pull-down (most pins, excl. JTAG) handling for the R-Car V3M SoC,
using the common R-Car bias handling.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Link: https://lore.kernel.org/r/bcfad447624d874258a45a92554574b8fe9f712f.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: 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