phy: phy-can-transceiver: Add support for TJA105{1,7}

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>
Acked-by: Marc Kleine-Budde <mkl@pengutronix.de>
Link: https://patch.msgid.link/20251001-can-v7-5-fad29efc3884@nxp.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>

diff --git a/drivers/phy/phy-can-transceiver.c b/drivers/phy/phy-can-transceiver.c
index 89189be9b795a626dff7046c6a60cd4b841f4f0f..330356706ad7bd40901f2cab928f90e1b4dc6c5a 100644 (file)
--- 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 +49,7 @@ static int can_transceiver_phy_power_on(struct phy *phy)
                        return ret;
                }
        }
+       gpiod_set_value_cansleep(can_transceiver_phy->silent_gpio, 0);
        gpiod_set_value_cansleep(can_transceiver_phy->standby_gpio, 0);
        gpiod_set_value_cansleep(can_transceiver_phy->enable_gpio, 1);
 
@@ -59,6 +62,7 @@ static int can_transceiver_phy_power_off(struct phy *phy)
        struct can_transceiver_phy *can_transceiver_phy = phy_get_drvdata(phy);
        struct can_transceiver_priv *priv = can_transceiver_phy->priv;
 
+       gpiod_set_value_cansleep(can_transceiver_phy->silent_gpio, 1);
        gpiod_set_value_cansleep(can_transceiver_phy->standby_gpio, 1);
        gpiod_set_value_cansleep(can_transceiver_phy->enable_gpio, 0);
        if (priv->mux_state)
@@ -85,6 +89,14 @@ 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",
@@ -98,6 +110,14 @@ 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
@@ -144,6 +164,7 @@ 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;
@@ -203,7 +224,16 @@ static int can_transceiver_phy_probe(struct platform_device *pdev)
                        can_transceiver_phy->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);
+                       can_transceiver_phy->silent_gpio = silent_gpio;
+               }
+
                phy_set_drvdata(can_transceiver_phy->generic_phy, can_transceiver_phy);
+
        }
 
        phy_provider = devm_of_phy_provider_register(dev, can_transceiver_phy_xlate);