gpio: renesas: Add R-Car Gen5 support

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]

diff --git a/drivers/gpio/gpio-rcar.c b/drivers/gpio/gpio-rcar.c
index f4eaf6f9c2d11197cdf054cd9841065152e762d9..c1ad20177f7f7ed3dafe52842d70fc3fd3f0e8d8 100644 (file)
--- a/drivers/gpio/gpio-rcar.c
+++ b/drivers/gpio/gpio-rcar.c
@@ -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 */ }
 };