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gpio: renesas: Add R-Car Gen5 support

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Add support for the GPIO controller block in the R-Car Gen5 SoC family.
The GPIO controller has a General Input Enable Register (INEN), whose
reset state is to have all input disabled. The GPIO controller also has
updated offsets for its control registers. U-Boot uses three registers,
INDT, POSNEG, INEN, which have updated offsets, those are handled by the
driver.

Signed-off-by: Huy Bui <huy.bui.wm@renesas.com>
Signed-off-by: Hai Pham <hai.pham.ud@renesas.com>
Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
[Marek: - Access Gen5 specific registers via driver data offsets,
        - Update commit message]
This commit is contained in:
Huy Bui 2025-10-27 17:35:38 +01:00 committed by Marek Vasut
parent d81ffc337d
commit 7ee86cab7b
1 changed files with 12 additions and 0 deletions
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12
drivers/gpio/gpio-rcar.c
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@ -22,6 +22,10 @@
#define GPIO_POSNEG_G2 0x20 /* Positive/Negative Logic Select Register */
#define GPIO_INEN_G4 0x50 /* General Input Enable Register */
#define GPIO_INDT_G5 0x1c /* General Input Register */
#define GPIO_POSNEG_G5 0x90 /* Positive/Negative Logic Select Register */
#define GPIO_INEN_G5 0x18 /* General Input Enable Register */
#define RCAR_MAX_GPIO_PER_BANK 32
#define RCAR_GPIO_HAS_INEN BIT(0)
@ -184,6 +188,13 @@ static const struct rcar_gpio_data rcar_gpio_gen3_data = {
.inen_offset = GPIO_INEN_G4,
};
static const struct rcar_gpio_data rcar_gpio_gen5_data = {
.quirks = RCAR_GPIO_HAS_INEN,
.indt_offset = GPIO_INDT_G5,
.posneg_offset = GPIO_POSNEG_G5,
.inen_offset = GPIO_INEN_G5,
};
static const struct udevice_id rcar_gpio_ids[] = {
{ .compatible = "renesas,gpio-r8a7795", .data = (ulong)&rcar_gpio_gen2_data },
{ .compatible = "renesas,gpio-r8a7796", .data = (ulong)&rcar_gpio_gen2_data },
@ -195,6 +206,7 @@ static const struct udevice_id rcar_gpio_ids[] = {
{ .compatible = "renesas,rcar-gen2-gpio", .data = (ulong)&rcar_gpio_gen2_data },
{ .compatible = "renesas,rcar-gen3-gpio", .data = (ulong)&rcar_gpio_gen2_data },
{ .compatible = "renesas,rcar-gen4-gpio", .data = (ulong)&rcar_gpio_gen3_data },
{ .compatible = "renesas,rcar-gen5-gpio", .data = (ulong)&rcar_gpio_gen5_data },
{ /* sentinel */ }
};