[PATCH net-next 2/4] can: flexcan: add transceiver capabilities
From: Marc Kleine-Budde <mkl@pengutronix.de>
Date: 2025-03-14 13:23:33
Also in:
linux-can
Subsystem:
can network drivers, the rest · Maintainers:
Marc Kleine-Budde, Vincent Mailhol, Linus Torvalds
From: Dimitri Fedrau <redacted> Currently the flexcan driver does only support adding PHYs by using the "old" regulator bindings. Add support for CAN transceivers as a PHY. Add the capability to ensure that the PHY is in operational state when the link is set to an "up" state. Signed-off-by: Dimitri Fedrau <redacted> Link: https://patch.msgid.link/20250312-flexcan-add-transceiver-caps-v4-2-29e89ae0225a@liebherr.com Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de> --- drivers/net/can/flexcan/flexcan-core.c | 27 ++++++++++++++++++++------ drivers/net/can/flexcan/flexcan.h | 1 + 2 files changed, 22 insertions(+), 6 deletions(-)
diff --git a/drivers/net/can/flexcan/flexcan-core.c b/drivers/net/can/flexcan/flexcan-core.c
index b347a1c93536..7588cb54a909 100644
--- a/drivers/net/can/flexcan/flexcan-core.c
+++ b/drivers/net/can/flexcan/flexcan-core.c@@ -26,6 +26,7 @@ #include <linux/pinctrl/consumer.h> #include <linux/platform_device.h> #include <linux/can/platform/flexcan.h> +#include <linux/phy/phy.h> #include <linux/pm_runtime.h> #include <linux/property.h> #include <linux/regmap.h>
@@ -644,18 +645,22 @@ static void flexcan_clks_disable(const struct flexcan_priv *priv) static inline int flexcan_transceiver_enable(const struct flexcan_priv *priv) { - if (!priv->reg_xceiver) - return 0; + if (priv->reg_xceiver) + return regulator_enable(priv->reg_xceiver); + else if (priv->transceiver) + return phy_power_on(priv->transceiver); - return regulator_enable(priv->reg_xceiver); + return 0; } static inline int flexcan_transceiver_disable(const struct flexcan_priv *priv) { - if (!priv->reg_xceiver) - return 0; + if (priv->reg_xceiver) + return regulator_disable(priv->reg_xceiver); + else if (priv->transceiver) + return phy_power_off(priv->transceiver); - return regulator_disable(priv->reg_xceiver); + return 0; } static int flexcan_chip_enable(struct flexcan_priv *priv)
@@ -2086,6 +2091,7 @@ static int flexcan_probe(struct platform_device *pdev) struct net_device *dev; struct flexcan_priv *priv; struct regulator *reg_xceiver; + struct phy *transceiver; struct clk *clk_ipg = NULL, *clk_per = NULL; struct flexcan_regs __iomem *regs; struct flexcan_platform_data *pdata;
@@ -2101,6 +2107,11 @@ static int flexcan_probe(struct platform_device *pdev) else if (IS_ERR(reg_xceiver)) return PTR_ERR(reg_xceiver); + transceiver = devm_phy_optional_get(&pdev->dev, NULL); + if (IS_ERR(transceiver)) + return dev_err_probe(&pdev->dev, PTR_ERR(transceiver), + "failed to get phy\n"); + if (pdev->dev.of_node) { of_property_read_u32(pdev->dev.of_node, "clock-frequency", &clock_freq);
@@ -2198,6 +2209,10 @@ static int flexcan_probe(struct platform_device *pdev) priv->clk_per = clk_per; priv->clk_src = clk_src; priv->reg_xceiver = reg_xceiver; + priv->transceiver = transceiver; + + if (transceiver) + priv->can.bitrate_max = transceiver->attrs.max_link_rate; if (priv->devtype_data.quirks & FLEXCAN_QUIRK_NR_IRQ_3) { priv->irq_boff = platform_get_irq(pdev, 1);
diff --git a/drivers/net/can/flexcan/flexcan.h b/drivers/net/can/flexcan/flexcan.h
index 2cf886618c96..16692a2502eb 100644
--- a/drivers/net/can/flexcan/flexcan.h
+++ b/drivers/net/can/flexcan/flexcan.h@@ -107,6 +107,7 @@ struct flexcan_priv { struct clk *clk_per; struct flexcan_devtype_data devtype_data; struct regulator *reg_xceiver; + struct phy *transceiver; struct flexcan_stop_mode stm; int irq_boff;
--
2.47.2