[PATCH v6 6/9] phy: phy-can-transceiver: Add support for TJA105{1,7}

Peng Fan
2025-09-09T05:41:10Z

Support TJA105{1,7} which are a single channel high-speed CAN transceiver
with silent mode supported.

phy mode is not implemented as of now. silent settings are kept in
phy_power_on and phy_power_off. After phy mode is supported, the silent
settings could be moved to phy_set_mode.

Reviewed-by: Frank Li <Frank.Li@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
---
drivers/phy/phy-can-transceiver.c | 35 +++++++++++++++++++++++++++++++++++
1 file changed, 35 insertions(+)

diff --git a/drivers/phy/phy-can-transceiver.c b/drivers/phy/phy-can-transceiver.c
index ccb29e1dfe0d07005b4bcd8fefa2787292d921a0..d9fd3564970695d5460ffdc4e8636dd7638d64a2 100644
--- a/drivers/phy/phy-can-transceiver.c
+++ b/drivers/phy/phy-can-transceiver.c
@@ -18,10 +18,12 @@ struct can_transceiver_data {
#define CAN_TRANSCEIVER_STB_PRESENT BIT(0)
#define CAN_TRANSCEIVER_EN_PRESENT BIT(1)
#define CAN_TRANSCEIVER_DUAL_CH BIT(2)
+#define CAN_TRANSCEIVER_SILENT_PRESENT BIT(3)
};

struct can_transceiver_phy {
struct phy *generic_phy;
+ struct gpio_desc *silent_gpio;
struct gpio_desc *standby_gpio;
struct gpio_desc *enable_gpio;
struct can_transceiver_priv *priv;
@@ -47,6 +49,10 @@ static int can_transceiver_phy_power_on(struct phy *phy)
}
}

+ ret = gpiod_set_value_cansleep(can_transceiver_phy->silent_gpio, 0);
+ if (ret)
+ return ret;
+
ret = gpiod_set_value_cansleep(can_transceiver_phy->standby_gpio, 0);
if (ret)
return ret;
@@ -60,6 +66,10 @@ static int can_transceiver_phy_power_off(struct phy *phy)
struct can_transceiver_phy *can_transceiver_phy = phy_get_drvdata(phy);
int ret;

+ ret = gpiod_set_value_cansleep(can_transceiver_phy->silent_gpio, 1);
+ if (ret)
+ return ret;
+
ret = gpiod_set_value_cansleep(can_transceiver_phy->standby_gpio, 1);
if (ret)
return ret;
@@ -92,6 +102,14 @@ static const struct can_transceiver_data tja1048_drvdata = {
.flags = CAN_TRANSCEIVER_STB_PRESENT | CAN_TRANSCEIVER_DUAL_CH,
};

+static const struct can_transceiver_data tja1051_drvdata = {
+ .flags = CAN_TRANSCEIVER_SILENT_PRESENT | CAN_TRANSCEIVER_EN_PRESENT,
+};
+
+static const struct can_transceiver_data tja1057_drvdata = {
+ .flags = CAN_TRANSCEIVER_SILENT_PRESENT,
+};
+
static const struct of_device_id can_transceiver_phy_ids[] = {
{
.compatible = "ti,tcan1042",
@@ -105,6 +123,14 @@ static const struct of_device_id can_transceiver_phy_ids[] = {
.compatible = "nxp,tja1048",
.data = &tja1048_drvdata
},
+ {
+ .compatible = "nxp,tja1051",
+ .data = &tja1051_drvdata
+ },
+ {
+ .compatible = "nxp,tja1057",
+ .data = &tja1057_drvdata
+ },
{
.compatible = "nxp,tjr1443",
.data = &tcan1043_drvdata
@@ -150,6 +176,7 @@ static int can_transceiver_phy_probe(struct platform_device *pdev)
const struct can_transceiver_data *drvdata;
const struct of_device_id *match;
struct phy *phy;
+ struct gpio_desc *silent_gpio;
struct gpio_desc *standby_gpio;
struct gpio_desc *enable_gpio;
struct mux_state *mux_state;
@@ -213,6 +240,14 @@ static int can_transceiver_phy_probe(struct platform_device *pdev)
priv->can_transceiver_phy[i].enable_gpio = enable_gpio;
}

+ if (drvdata->flags & CAN_TRANSCEIVER_SILENT_PRESENT) {
+ silent_gpio = devm_gpiod_get_index_optional(dev, "silent", i,
+ GPIOD_OUT_LOW);
+ if (IS_ERR(silent_gpio))
+ return PTR_ERR(silent_gpio);
+ priv->can_transceiver_phy[i].silent_gpio = silent_gpio;
+ }
+
phy_set_drvdata(priv->can_transceiver_phy[i].generic_phy,
&priv->can_transceiver_phy[i]);
}

--
2.37.1