This patch adds config macros describing the voltage levels available on
a pin. The current default (3.3V/1.8V) maps to zero to avoid having to
change existing PFC implementations.
Signed-off-by: Ulrich Hecht <uli+renesas@fpond.eu>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Link: https://lore.kernel.org/r/20210112165912.30876-3-uli+renesas@fpond.eu
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
On SuperH and ARM SH/R-Mobile SoCs, the pin control driver handles
GPIOs, too. To reduce code size when compiling a kernel supporting only
modern SoCs, most, but not all, of the GPIO functionality is protected
by checks for CONFIG_PINCTRL_SH_FUNC_GPIO.
Factor out the remaining parts when not needed:
1. sh_pfc_soc_info.{in,out}put describe GPIO pins that have input
resp. output capabilities (SuperH and SH/R-Mobile).
2. sh_pfc_soc_info.gpio_irq{,_size} describe the mapping from GPIO
pins to interrupt numbers (SH/R-Mobile).
3. sh_pfc_gpio_set_direction() configures GPIO direction, called from
the GPIO driver through pinctrl_gpio_direction_{in,out}put()
(SH/R-Mobile). Unfortunately this function cannot just be moved to
drivers/pinctrl/renesas/gpio.c, as it relies on knowledge of
sh_pfc_pinctrl, which is internal to
drivers/pinctrl/renesas/pinctrl.c.
While code size reduction is minimal, this does help in documenting
depencies.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20201028151637.1734130-9-geert+renesas@glider.be
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
Shrink sh_pfc_pin_config from 8 to 2 bytes:
- The mux_set flag can be removed, as a non-zero mark value means the
same (zero = PINMUX_RESERVED is an invalid mark value),
- The gpio_enabled flag needs only a single bit,
- Mark values are small integers, and can easily fit in a 15-bit
bitfield.
This saves 6 bytes per pin when allocating the sh_pfc_pinctrl.configs
array, i.e. it reduces run-time memory consumption by ca. 1.5 KiB.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20201028151637.1734130-5-geert+renesas@glider.be
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
Ulrich Hecht