[PATCH net-next 09/12] net: pse-pd: tps23881: Add support for PSE PI priority feature

Kory Maincent
2024-10-02T16:29:13Z

From: Kory Maincent (Dent Project) <kory.maincent@bootlin.com>

This patch extends the PSE callbacks by adding support for the newly
introduced pi_set_prio() callback, enabling the configuration of PSE PI
priorities. The current port priority is now also included in the status
information returned to users.

Signed-off-by: Kory Maincent <kory.maincent@bootlin.com>
---
drivers/net/pse-pd/tps23881.c | 57 +++++++++++++++++++++++++++++++++++++++++++
1 file changed, 57 insertions(+)

diff --git a/drivers/net/pse-pd/tps23881.c b/drivers/net/pse-pd/tps23881.c
index e05b45cdc9f8..ddb44a17218a 100644
--- a/drivers/net/pse-pd/tps23881.c
+++ b/drivers/net/pse-pd/tps23881.c
@@ -22,6 +22,7 @@
#define TPS23881_OP_MODE_SEMIAUTO 0xaaaa
#define TPS23881_REG_DIS_EN 0x13
#define TPS23881_REG_DET_CLA_EN 0x14
+#define TPS23881_REG_PW_PRIO 0x15
#define TPS23881_REG_GEN_MASK 0x17
#define TPS23881_REG_NBITACC BIT(5)
#define TPS23881_REG_PW_EN 0x19
@@ -408,6 +409,24 @@ static int tps23881_ethtool_get_status(struct pse_controller_dev *pcdev,
return ret;
status->c33_pw_class = ret;

+ ret = i2c_smbus_read_word_data(client, TPS23881_REG_PW_PRIO);
+ if (ret < 0)
+ return ret;
+
+ chan = priv->port[id].chan[0];
+ if (chan < 4)
+ status->c33_prio = !!(ret & BIT(chan + 4));
+ else
+ status->c33_prio = !!(ret & BIT(chan + 8));
+
+ if (priv->port[id].is_4p) {
+ chan = priv->port[id].chan[1];
+ if (chan < 4)
+ status->c33_prio &= !!(ret & BIT(chan + 4));
+ else
+ status->c33_prio &= !!(ret & BIT(chan + 8));
+ }
+
return 0;
}

@@ -925,6 +944,42 @@ static int tps23881_pi_set_current_limit(struct pse_controller_dev *pcdev,
return 0;
}

+static int tps23881_pi_set_prio(struct pse_controller_dev *pcdev, int id,
+ unsigned int prio)
+{
+ struct tps23881_priv *priv = to_tps23881_priv(pcdev);
+ struct i2c_client *client = priv->client;
+ u8 chan, bit;
+ u16 val;
+ int ret;
+
+ ret = i2c_smbus_read_word_data(client, TPS23881_REG_PW_PRIO);
+ if (ret < 0)
+ return ret;
+
+ chan = priv->port[id].chan[0];
+ if (chan < 4)
+ bit = chan + 4;
+ else
+ bit = chan + 8;
+
+ val = (u16)(ret & ~BIT(bit));
+ val |= prio << (bit);
+
+ if (priv->port[id].is_4p) {
+ chan = priv->port[id].chan[1];
+ if (chan < 4)
+ bit = chan + 4;
+ else
+ bit = chan + 8;
+
+ val &= ~BIT(bit);
+ val |= prio << (bit);
+ }
+
+ return i2c_smbus_write_word_data(client, TPS23881_REG_PW_PRIO, val);
+}
+
static const struct pse_controller_ops tps23881_ops = {
.setup_pi_matrix = tps23881_setup_pi_matrix,
.pi_enable = tps23881_pi_enable,
@@ -934,6 +989,7 @@ static const struct pse_controller_ops tps23881_ops = {
.pi_get_voltage = tps23881_pi_get_voltage,
.pi_get_current_limit = tps23881_pi_get_current_limit,
.pi_set_current_limit = tps23881_pi_set_current_limit,
+ .pi_set_prio = tps23881_pi_set_prio,
};

static const char fw_parity_name[] = "ti/tps23881/tps23881-parity-14.bin";
@@ -1106,6 +1162,7 @@ static int tps23881_i2c_probe(struct i2c_client *client)
priv->pcdev.dev = dev;
priv->pcdev.types = ETHTOOL_PSE_C33;
priv->pcdev.nr_lines = TPS23881_MAX_CHANS;
+ priv->pcdev.pis_prio_max = 1;
ret = devm_pse_controller_register(dev, &priv->pcdev);
if (ret) {
return dev_err_probe(dev, ret,

--
2.34.1