nWKRQ supports an output voltage of either the internal reference voltage
(3.6V) or the reference voltage of the digital interface 0 - 6V (VIO).
Add the devicetree option ti,nwkrq-voltage-vio to set it to VIO.
Unset nWKRQ is kept at internal reference voltage.
Signed-off-by: Sean Nyekjaer <sean@xxxxxxxxxx>
---
drivers/net/can/m_can/tcan4x5x-core.c | 20 ++++++++++++++++++++
drivers/net/can/m_can/tcan4x5x.h | 2 ++
2 files changed, 22 insertions(+)
diff --git a/drivers/net/can/m_can/tcan4x5x-core.c b/drivers/net/can/m_can/tcan4x5x-core.c
index 2f73bf3abad889c222f15c39a3d43de1a1cf5fbb..12a375c653cbd255b5dc85faf2f76de397a644ec 100644
--- a/drivers/net/can/m_can/tcan4x5x-core.c
+++ b/drivers/net/can/m_can/tcan4x5x-core.c
@@ -92,6 +92,8 @@
#define TCAN4X5X_MODE_STANDBY BIT(6)
#define TCAN4X5X_MODE_NORMAL BIT(7)
+#define TCAN4X5X_NWKRQ_VOLTAGE_VIO BIT(19)
+
#define TCAN4X5X_DISABLE_WAKE_MSK (BIT(31) | BIT(30))
#define TCAN4X5X_DISABLE_INH_MSK BIT(9)
@@ -267,6 +269,13 @@ static int tcan4x5x_init(struct m_can_classdev *cdev)
if (ret)
return ret;
+ if (tcan4x5x->nwkrq_voltage_vio) {
+ ret = regmap_set_bits(tcan4x5x->regmap, TCAN4X5X_CONFIG,
+ TCAN4X5X_NWKRQ_VOLTAGE_VIO);
+ if (ret)
+ return ret;
+ }
+
return ret;
}
@@ -318,6 +327,15 @@ static const struct tcan4x5x_version_info
return &tcan4x5x_versions[TCAN4X5X];
}
+static void 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;
+
+ if (of_property_read_bool(np, "ti,nwkrq-voltage-vio"))
+ tcan4x5x->nwkrq_voltage_vio = true;
+}
+
static int tcan4x5x_get_gpios(struct m_can_classdev *cdev,
const struct tcan4x5x_version_info *version_info)
{
@@ -453,6 +471,8 @@ static int tcan4x5x_can_probe(struct spi_device *spi)
goto out_power;
}
+ tcan4x5x_get_dt_data(mcan_class);
+
tcan4x5x_check_wake(priv);
ret = tcan4x5x_write_tcan_reg(mcan_class, TCAN4X5X_INT_EN, 0);
diff --git a/drivers/net/can/m_can/tcan4x5x.h b/drivers/net/can/m_can/tcan4x5x.h
index e62c030d3e1e5a713c997e7c8ecad4a44aff4e6a..203399d5e8ccf3fd7a26b54d8356fca9d398524c 100644
--- a/drivers/net/can/m_can/tcan4x5x.h
+++ b/drivers/net/can/m_can/tcan4x5x.h
@@ -42,6 +42,8 @@ struct tcan4x5x_priv {
struct tcan4x5x_map_buf map_buf_rx;
struct tcan4x5x_map_buf map_buf_tx;
+
+ bool nwkrq_voltage_vio;
};
static inline void
--
2.46.2
