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phy: phy-can-transceiver: Add dual channel support for TJA1048

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- Introduce new flag CAN_TRANSCEIVER_DUAL_CH to indicate the phy has two
  channels.
- Alloc a phy for each channel
- Support TJA1048 which is a dual high-speed CAN transceiver with sleep
  mode supported.
- Add can_transceiver_phy_xlate for parsing phy

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-v7-3-fad29efc3884@nxp.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Peng Fan 2025-10-01 21:22:34 +08:00 committed by Vinod Koul
parent c77464bd9b
commit 6e9fe9409e
1 changed files with 63 additions and 27 deletions
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90
drivers/phy/phy-can-transceiver.c
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@ -17,6 +17,7 @@ struct can_transceiver_data {
u32 flags;
#define CAN_TRANSCEIVER_STB_PRESENT BIT(0)
#define CAN_TRANSCEIVER_EN_PRESENT BIT(1)
#define CAN_TRANSCEIVER_DUAL_CH BIT(2)
};
struct can_transceiver_phy {
@ -84,6 +85,10 @@ static const struct can_transceiver_data tcan1043_drvdata = {
.flags = CAN_TRANSCEIVER_STB_PRESENT | CAN_TRANSCEIVER_EN_PRESENT,
};
static const struct can_transceiver_data tja1048_drvdata = {
.flags = CAN_TRANSCEIVER_STB_PRESENT | CAN_TRANSCEIVER_DUAL_CH,
};
static const struct of_device_id can_transceiver_phy_ids[] = {
{
.compatible = "ti,tcan1042",
@ -93,6 +98,10 @@ static const struct of_device_id can_transceiver_phy_ids[] = {
.compatible = "ti,tcan1043",
.data = &tcan1043_drvdata
},
{
.compatible = "nxp,tja1048",
.data = &tja1048_drvdata
},
{
.compatible = "nxp,tjr1443",
.data = &tcan1043_drvdata
@ -111,6 +120,25 @@ devm_mux_state_get_optional(struct device *dev, const char *mux_name)
return devm_mux_state_get(dev, mux_name);
}
static struct phy *can_transceiver_phy_xlate(struct device *dev,
const struct of_phandle_args *args)
{
struct can_transceiver_priv *priv = dev_get_drvdata(dev);
u32 idx;
if (priv->num_ch == 1)
return priv->can_transceiver_phy[0].generic_phy;
if (args->args_count != 1)
return ERR_PTR(-EINVAL);
idx = args->args[0];
if (idx >= priv->num_ch)
return ERR_PTR(-EINVAL);
return priv->can_transceiver_phy[idx].generic_phy;
}
static int can_transceiver_phy_probe(struct platform_device *pdev)
{
struct phy_provider *phy_provider;
@ -124,10 +152,12 @@ static int can_transceiver_phy_probe(struct platform_device *pdev)
struct gpio_desc *enable_gpio;
struct mux_state *mux_state;
u32 max_bitrate = 0;
int err, num_ch = 1;
int err, i, num_ch = 1;
match = of_match_node(can_transceiver_phy_ids, pdev->dev.of_node);
drvdata = match->data;
if (drvdata->flags & CAN_TRANSCEIVER_DUAL_CH)
num_ch = 2;
priv = devm_kzalloc(dev, struct_size(priv, can_transceiver_phy, num_ch), GFP_KERNEL);
if (!priv)
@ -135,8 +165,6 @@ static int can_transceiver_phy_probe(struct platform_device *pdev)
priv->num_ch = num_ch;
platform_set_drvdata(pdev, priv);
can_transceiver_phy = &priv->can_transceiver_phy[0];
can_transceiver_phy->priv = priv;
mux_state = devm_mux_state_get_optional(dev, NULL);
if (IS_ERR(mux_state))
@ -144,37 +172,45 @@ static int can_transceiver_phy_probe(struct platform_device *pdev)
priv->mux_state = mux_state;
phy = devm_phy_create(dev, dev->of_node,
&can_transceiver_phy_ops);
if (IS_ERR(phy)) {
dev_err(dev, "failed to create can transceiver phy\n");
return PTR_ERR(phy);
}
err = device_property_read_u32(dev, "max-bitrate", &max_bitrate);
if ((err != -EINVAL) && !max_bitrate)
dev_warn(dev, "Invalid value for transceiver max bitrate. Ignoring bitrate limit\n");
phy->attrs.max_link_rate = max_bitrate;
can_transceiver_phy->generic_phy = phy;
for (i = 0; i < num_ch; i++) {
can_transceiver_phy = &priv->can_transceiver_phy[i];
can_transceiver_phy->priv = priv;
if (drvdata->flags & CAN_TRANSCEIVER_STB_PRESENT) {
standby_gpio = devm_gpiod_get_optional(dev, "standby", GPIOD_OUT_HIGH);
if (IS_ERR(standby_gpio))
return PTR_ERR(standby_gpio);
can_transceiver_phy->standby_gpio = standby_gpio;
phy = devm_phy_create(dev, dev->of_node, &can_transceiver_phy_ops);
if (IS_ERR(phy)) {
dev_err(dev, "failed to create can transceiver phy\n");
return PTR_ERR(phy);
}
phy->attrs.max_link_rate = max_bitrate;
can_transceiver_phy->generic_phy = phy;
can_transceiver_phy->priv = priv;
if (drvdata->flags & CAN_TRANSCEIVER_STB_PRESENT) {
standby_gpio = devm_gpiod_get_index_optional(dev, "standby", i,
GPIOD_OUT_HIGH);
if (IS_ERR(standby_gpio))
return PTR_ERR(standby_gpio);
can_transceiver_phy->standby_gpio = standby_gpio;
}
if (drvdata->flags & CAN_TRANSCEIVER_EN_PRESENT) {
enable_gpio = devm_gpiod_get_index_optional(dev, "enable", i,
GPIOD_OUT_LOW);
if (IS_ERR(enable_gpio))
return PTR_ERR(enable_gpio);
can_transceiver_phy->enable_gpio = enable_gpio;
}
phy_set_drvdata(can_transceiver_phy->generic_phy, can_transceiver_phy);
}
if (drvdata->flags & CAN_TRANSCEIVER_EN_PRESENT) {
enable_gpio = devm_gpiod_get_optional(dev, "enable", GPIOD_OUT_LOW);
if (IS_ERR(enable_gpio))
return PTR_ERR(enable_gpio);
can_transceiver_phy->enable_gpio = enable_gpio;
}
phy_set_drvdata(can_transceiver_phy->generic_phy, can_transceiver_phy);
phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
phy_provider = devm_of_phy_provider_register(dev, can_transceiver_phy_xlate);
return PTR_ERR_OR_ZERO(phy_provider);
}