@@ -69,6 +69,7 @@ static struct at91_twi_pdata at91rm9200_config = {
.has_alt_cmd = false,
.has_hold_field = false,
.has_dig_filtr = false,
+ .has_adv_dig_filtr = false,
};
static struct at91_twi_pdata at91sam9261_config = {
@@ -78,6 +79,7 @@ static struct at91_twi_pdata at91sam9261_config = {
.has_alt_cmd = false,
.has_hold_field = false,
.has_dig_filtr = false,
+ .has_adv_dig_filtr = false,
};
static struct at91_twi_pdata at91sam9260_config = {
@@ -87,6 +89,7 @@ static struct at91_twi_pdata at91sam9260_config = {
.has_alt_cmd = false,
.has_hold_field = false,
.has_dig_filtr = false,
+ .has_adv_dig_filtr = false,
};
static struct at91_twi_pdata at91sam9g20_config = {
@@ -96,6 +99,7 @@ static struct at91_twi_pdata at91sam9g20_config = {
.has_alt_cmd = false,
.has_hold_field = false,
.has_dig_filtr = false,
+ .has_adv_dig_filtr = false,
};
static struct at91_twi_pdata at91sam9g10_config = {
@@ -105,6 +109,7 @@ static struct at91_twi_pdata at91sam9g10_config = {
.has_alt_cmd = false,
.has_hold_field = false,
.has_dig_filtr = false,
+ .has_adv_dig_filtr = false,
};
static const struct platform_device_id at91_twi_devtypes[] = {
@@ -136,6 +141,7 @@ static struct at91_twi_pdata at91sam9x5_config = {
.has_alt_cmd = false,
.has_hold_field = false,
.has_dig_filtr = false,
+ .has_adv_dig_filtr = false,
};
static struct at91_twi_pdata sama5d4_config = {
@@ -145,6 +151,7 @@ static struct at91_twi_pdata sama5d4_config = {
.has_alt_cmd = false,
.has_hold_field = true,
.has_dig_filtr = true,
+ .has_adv_dig_filtr = false,
};
static struct at91_twi_pdata sama5d2_config = {
@@ -154,6 +161,7 @@ static struct at91_twi_pdata sama5d2_config = {
.has_alt_cmd = true,
.has_hold_field = true,
.has_dig_filtr = true,
+ .has_adv_dig_filtr = true,
};
static struct at91_twi_pdata sam9x60_config = {
@@ -163,6 +171,7 @@ static struct at91_twi_pdata sam9x60_config = {
.has_alt_cmd = true,
.has_hold_field = true,
.has_dig_filtr = true,
+ .has_adv_dig_filtr = true,
};
static const struct of_device_id atmel_twi_dt_ids[] = {
@@ -43,6 +43,12 @@ void at91_init_twi_bus_master(struct at91_twi_dev *dev)
/* enable digital filter */
if (pdata->has_dig_filtr)
at91_twi_write(dev, AT91_TWI_FILTR, AT91_TWI_FILTR_FILT);
+
+ /* enable advanced digital filter */
+ if (pdata->has_adv_dig_filtr)
+ at91_twi_write(dev, AT91_TWI_FILTR, AT91_TWI_FILTR_FILT |
+ (AT91_TWI_FILTR_THRES(7) &
+ AT91_TWI_FILTR_THRES_MASK));
}
/*
@@ -86,6 +86,8 @@
#define AT91_TWI_FILTR 0x0044
#define AT91_TWI_FILTR_FILT BIT(0)
+#define AT91_TWI_FILTR_THRES(v) ((v) << 8)
+#define AT91_TWI_FILTR_THRES_MASK GENMASK(10, 8)
#define AT91_TWI_FMR 0x0050 /* FIFO Mode Register */
#define AT91_TWI_FMR_TXRDYM(mode) (((mode) & 0x3) << 0)
@@ -112,6 +114,7 @@ struct at91_twi_pdata {
bool has_alt_cmd;
bool has_hold_field;
bool has_dig_filtr;
+ bool has_adv_dig_filtr;
struct at_dma_slave dma_slave;
};