[PATCH 1/2] gpio: atmel_pio4: add support for sama7g5 pio4 version with 5 banks

Add support for sama7g5 pinctrl variant, with 5 banks with a degraded 8 line only 5th bank. Based on Linux Kernel implementation.

Signed-off-by: Eugen Hristev eugen.hristev@microchip.com --- drivers/gpio/atmel_pio4.c | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+)

diff --git a/drivers/gpio/atmel_pio4.c b/drivers/gpio/atmel_pio4.c index f615fce32e..bea609db9d 100644 --- a/drivers/gpio/atmel_pio4.c +++ b/drivers/gpio/atmel_pio4.c @@ -173,8 +173,15 @@ int atmel_pio4_get_pio_input(u32 port, u32 pin)

#if CONFIG_IS_ENABLED(DM_GPIO)

+/** + * struct atmel_pioctrl_data - Atmel PIO controller (pinmux + gpio) data struct + * @nbanks: number of PIO banks + * @last_bank_count: number of lines in the last bank (can be less than + * the rest of the banks). + */ struct atmel_pioctrl_data { u32 nbanks; + u32 last_bank_count; };

struct atmel_pio4_plat { @@ -313,6 +320,12 @@ static int atmel_pio4_probe(struct udevice *dev) NULL); uc_priv->gpio_count = nbanks * ATMEL_PIO_NPINS_PER_BANK;

+ /* if last bank has limited number of pins, adjust accordingly */ + if (pioctrl_data->last_bank_count != ATMEL_PIO_NPINS_PER_BANK) { + uc_priv->gpio_count -= ATMEL_PIO_NPINS_PER_BANK; + uc_priv->gpio_count += pioctrl_data->last_bank_count; + } + return 0; }

@@ -322,12 +335,21 @@ static int atmel_pio4_probe(struct udevice *dev) */ static const struct atmel_pioctrl_data atmel_sama5d2_pioctrl_data = { .nbanks = 4, + .last_bank_count = ATMEL_PIO_NPINS_PER_BANK, +}; + +static const struct atmel_pioctrl_data microchip_sama7g5_pioctrl_data = { + .nbanks = 5, + .last_bank_count = 8, /* 5th bank has only 8 lines on sama7g5 */ };

static const struct udevice_id atmel_pio4_ids[] = { { .compatible = "atmel,sama5d2-gpio", .data = (ulong)&atmel_sama5d2_pioctrl_data, + }, { + .compatible = "microchip,sama7g5-gpio", + .data = (ulong)&microchip_sama7g5_pioctrl_data, }, {} };