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

[Peng Fan <peng.fan@nxp.com>]

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