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Subject[RFC PATCH net-next v2 05/17] net: dsa: qca8k: add support for qca8327 switch
Date
qca8327 switch is a low tier version of the more recent qca8337.
It does share the same regs used by the qca8k driver and can be
supported with minimal change.

Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
---
drivers/net/dsa/qca8k.c | 23 ++++++++++++++++++++---
drivers/net/dsa/qca8k.h | 6 ++++++
2 files changed, 26 insertions(+), 3 deletions(-)

diff --git a/drivers/net/dsa/qca8k.c b/drivers/net/dsa/qca8k.c
index 0678c213065f..acfe072e9430 100644
--- a/drivers/net/dsa/qca8k.c
+++ b/drivers/net/dsa/qca8k.c
@@ -1522,6 +1522,7 @@ static const struct dsa_switch_ops qca8k_switch_ops = {
static int
qca8k_sw_probe(struct mdio_device *mdiodev)
{
+ const struct qca8k_match_data *data;
struct qca8k_priv *priv;
int ret;
u32 id;
@@ -1550,6 +1551,11 @@ qca8k_sw_probe(struct mdio_device *mdiodev)
gpiod_set_value_cansleep(priv->reset_gpio, 0);
}

+ /* get the switches ID from the compatible */
+ data = of_device_get_match_data(&mdiodev->dev);
+ if (!data)
+ return -ENODEV;
+
/* read the switches ID register */
ret = qca8k_read(priv, QCA8K_REG_MASK_CTRL, &id);
if (ret)
@@ -1557,8 +1563,10 @@ qca8k_sw_probe(struct mdio_device *mdiodev)

id >>= QCA8K_MASK_CTRL_ID_S;
id &= QCA8K_MASK_CTRL_ID_M;
- if (id != QCA8K_ID_QCA8337)
+ if (id != data->id) {
+ dev_err(&mdiodev->dev, "Switch id detected %x but expected %x", id, data->id);
return -ENODEV;
+ }

priv->ds = devm_kzalloc(&mdiodev->dev, sizeof(*priv->ds), GFP_KERNEL);
if (!priv->ds)
@@ -1623,9 +1631,18 @@ static int qca8k_resume(struct device *dev)
static SIMPLE_DEV_PM_OPS(qca8k_pm_ops,
qca8k_suspend, qca8k_resume);

+static const struct qca8k_match_data qca832x = {
+ .id = QCA8K_ID_QCA8327,
+};
+
+static const struct qca8k_match_data qca833x = {
+ .id = QCA8K_ID_QCA8337,
+};
+
static const struct of_device_id qca8k_of_match[] = {
- { .compatible = "qca,qca8334" },
- { .compatible = "qca,qca8337" },
+ { .compatible = "qca,qca8327", .data = &qca832x },
+ { .compatible = "qca,qca8334", .data = &qca833x },
+ { .compatible = "qca,qca8337", .data = &qca833x },
{ /* sentinel */ },
};

diff --git a/drivers/net/dsa/qca8k.h b/drivers/net/dsa/qca8k.h
index 7ca4b93e0bb5..86e8d479c9f9 100644
--- a/drivers/net/dsa/qca8k.h
+++ b/drivers/net/dsa/qca8k.h
@@ -15,6 +15,8 @@
#define QCA8K_NUM_PORTS 7
#define QCA8K_MAX_MTU 9000

+#define PHY_ID_QCA8327 0x004dd034
+#define QCA8K_ID_QCA8327 0x12
#define PHY_ID_QCA8337 0x004dd036
#define QCA8K_ID_QCA8337 0x13

@@ -211,6 +213,10 @@ struct ar8xxx_port_status {
int enabled;
};

+struct qca8k_match_data {
+ u8 id;
+};
+
struct qca8k_priv {
struct regmap *regmap;
struct mii_bus *bus;
--
2.30.2
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