@@ -92,6 +92,8 @@
#define TCAN4X5X_MODE_STANDBY BIT(6)
#define TCAN4X5X_MODE_NORMAL BIT(7)
+#define TCAN4X5X_NWKRQ_VOLTAGE_MASK BIT(19)
+
#define TCAN4X5X_DISABLE_WAKE_MSK (BIT(31) | BIT(30))
#define TCAN4X5X_DISABLE_INH_MSK BIT(9)
@@ -267,6 +269,11 @@ static int tcan4x5x_init(struct m_can_classdev *cdev)
if (ret)
return ret;
+ ret = regmap_update_bits(tcan4x5x->regmap, TCAN4X5X_CONFIG,
+ TCAN4X5X_NWKRQ_VOLTAGE_MASK, tcan4x5x->nwkrq_voltage);
+ if (ret)
+ return ret;
+
return ret;
}
@@ -318,6 +325,28 @@ static const struct tcan4x5x_version_info
return &tcan4x5x_versions[TCAN4X5X];
}
+static int tcan4x5x_get_dt_data(struct m_can_classdev *cdev)
+{
+ struct tcan4x5x_priv *tcan4x5x = cdev_to_priv(cdev);
+ struct device_node *np = cdev->dev->of_node;
+ u8 prop;
+ int ret;
+
+ ret = of_property_read_u8(np, "ti,nwkrq-voltage-sel", &prop);
+ if (!ret) {
+ if (prop <= 1)
+ tcan4x5x->nwkrq_voltage = prop;
+ else
+ dev_warn(cdev->dev,
+ "nwkrq-voltage-sel have invalid option: %u\n",
+ prop);
+ } else {
+ tcan4x5x->nwkrq_voltage = 0;
+ }
+
+ return 0;
+}
+
static int tcan4x5x_get_gpios(struct m_can_classdev *cdev,
const struct tcan4x5x_version_info *version_info)
{
@@ -453,6 +482,12 @@ static int tcan4x5x_can_probe(struct spi_device *spi)
goto out_power;
}
+ ret = tcan4x5x_get_dt_data(mcan_class);
+ if (ret) {
+ dev_err(&spi->dev, "Getting dt data failed %pe\n", ERR_PTR(ret));
+ goto out_power;
+ }
+
tcan4x5x_check_wake(priv);
ret = tcan4x5x_write_tcan_reg(mcan_class, TCAN4X5X_INT_EN, 0);
@@ -42,6 +42,8 @@ struct tcan4x5x_priv {
struct tcan4x5x_map_buf map_buf_rx;
struct tcan4x5x_map_buf map_buf_tx;
+
+ u8 nwkrq_voltage;
};
static inline void
nWKRQ supports an output voltage of either the internal reference voltage (3.6V) or the reference voltage of the digital interface 0 - 6V. Add the devicetree option ti,nwkrq-voltage-sel to be able to select between them. Default is kept as the internal reference voltage. Signed-off-by: Sean Nyekjaer <sean@geanix.com> --- drivers/net/can/m_can/tcan4x5x-core.c | 35 +++++++++++++++++++++++++++++++++++ drivers/net/can/m_can/tcan4x5x.h | 2 ++ 2 files changed, 37 insertions(+)