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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>
This commit is contained in:
Eugen Hristev 2021-04-07 11:39:28 +03:00
parent 3a9aaefcaa
commit e1038ac0cb
1 changed files with 22 additions and 0 deletions
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22
drivers/gpio/atmel_pio4.c
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@ -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,
},
{}
};