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Date: Sat, 6 Jan 2024 15:40:47 -0300
From: Luiz Angelo Daros de Luca <luizluca@...il.com>
To: netdev@...r.kernel.org
Cc: linus.walleij@...aro.org,
alsi@...g-olufsen.dk,
andrew@...n.ch,
f.fainelli@...il.com,
olteanv@...il.com,
davem@...emloft.net,
edumazet@...gle.com,
kuba@...nel.org,
pabeni@...hat.com,
arinc.unal@...nc9.com,
ansuelsmth@...il.com,
Luiz Angelo Daros de Luca <luizluca@...il.com>
Subject: [RFC net-next 2/2] net: dsa: realtek: add LED drivers for rtl8366rb
This commit introduces LED drivers for rtl8366rb, allowing LEDs to be
described in the device tree using the same format as qca8k. Each port
can configure up to 4 LEDs.
If LEDs use the default state "keep", they will keep the default
behavior after a reset. Changing the brightness of one LED will cause
the entire LED group to switch to manually controlled LEDs. Once in this
mode, there is no way to revert to hardware-controlled LEDs (except by
resetting the switch).
Software triggers function as expected with manually controlled LEDs.
Signed-off-by: Luiz Angelo Daros de Luca <luizluca@...il.com>
---
drivers/net/dsa/realtek/rtl8366rb.c | 269 +++++++++++++++++++++++++---
1 file changed, 245 insertions(+), 24 deletions(-)
diff --git a/drivers/net/dsa/realtek/rtl8366rb.c b/drivers/net/dsa/realtek/rtl8366rb.c
index 874e04cf2e0d..f71cb59b8048 100644
--- a/drivers/net/dsa/realtek/rtl8366rb.c
+++ b/drivers/net/dsa/realtek/rtl8366rb.c
@@ -188,31 +188,21 @@
(4 * (led_group))
#define RTL8366RB_LED_CTRL_MASK(led_group) \
(0xf << RTL8366RB_LED_CTRL_OFFSET(led_group))
-#define RTL8366RB_LED_OFF 0x0
-#define RTL8366RB_LED_DUP_COL 0x1
-#define RTL8366RB_LED_LINK_ACT 0x2
-#define RTL8366RB_LED_SPD1000 0x3
-#define RTL8366RB_LED_SPD100 0x4
-#define RTL8366RB_LED_SPD10 0x5
-#define RTL8366RB_LED_SPD1000_ACT 0x6
-#define RTL8366RB_LED_SPD100_ACT 0x7
-#define RTL8366RB_LED_SPD10_ACT 0x8
-#define RTL8366RB_LED_SPD100_10_ACT 0x9
-#define RTL8366RB_LED_FIBER 0xa
-#define RTL8366RB_LED_AN_FAULT 0xb
-#define RTL8366RB_LED_LINK_RX 0xc
-#define RTL8366RB_LED_LINK_TX 0xd
-#define RTL8366RB_LED_MASTER 0xe
-#define RTL8366RB_LED_FORCE 0xf
/* The RTL8366RB_LED_X_X registers are used to manually set the LED state only
* when the corresponding LED group in RTL8366RB_LED_CTRL_REG is
* RTL8366RB_LED_FORCE. Otherwise, it is ignored.
*/
#define RTL8366RB_LED_0_1_CTRL_REG 0x0432
-#define RTL8366RB_LED_1_OFFSET 6
#define RTL8366RB_LED_2_3_CTRL_REG 0x0433
-#define RTL8366RB_LED_3_OFFSET 6
+#define RTL8366RB_LED_X_X_CTRL_REG(led_group) \
+ ((led_group) <= 1 ? \
+ RTL8366RB_LED_0_1_CTRL_REG : \
+ RTL8366RB_LED_2_3_CTRL_REG)
+#define RTL8366RB_LED_0_X_CTRL_MASK GENMASK(5, 0)
+#define RTL8366RB_LED_X_1_CTRL_MASK GENMASK(11, 6)
+#define RTL8366RB_LED_2_X_CTRL_MASK GENMASK(5, 0)
+#define RTL8366RB_LED_X_3_CTRL_MASK GENMASK(11, 6)
#define RTL8366RB_MIB_COUNT 33
#define RTL8366RB_GLOBAL_MIB_COUNT 1
@@ -356,14 +346,44 @@
#define RTL8366RB_GREEN_FEATURE_TX BIT(0)
#define RTL8366RB_GREEN_FEATURE_RX BIT(2)
+enum rtl8366_led_mode {
+ RTL8366RB_LED_OFF = 0x0,
+ RTL8366RB_LED_DUP_COL = 0x1,
+ RTL8366RB_LED_LINK_ACT = 0x2,
+ RTL8366RB_LED_SPD1000 = 0x3,
+ RTL8366RB_LED_SPD100 = 0x4,
+ RTL8366RB_LED_SPD10 = 0x5,
+ RTL8366RB_LED_SPD1000_ACT = 0x6,
+ RTL8366RB_LED_SPD100_ACT = 0x7,
+ RTL8366RB_LED_SPD10_ACT = 0x8,
+ RTL8366RB_LED_SPD100_10_ACT = 0x9,
+ RTL8366RB_LED_FIBER = 0xa,
+ RTL8366RB_LED_AN_FAULT = 0xb,
+ RTL8366RB_LED_LINK_RX = 0xc,
+ RTL8366RB_LED_LINK_TX = 0xd,
+ RTL8366RB_LED_MASTER = 0xe,
+ RTL8366RB_LED_FORCE = 0xf,
+
+ __RTL8366RB_LED_MAX
+};
+
+struct rtl8366rb_led {
+ u8 port_num;
+ u8 led_group;
+ struct realtek_priv *priv;
+ struct led_classdev cdev;
+};
+
/**
* struct rtl8366rb - RTL8366RB-specific data
* @max_mtu: per-port max MTU setting
* @pvid_enabled: if PVID is set for respective port
+ * @leds: per-port and per-ledgroup led info
*/
struct rtl8366rb {
unsigned int max_mtu[RTL8366RB_NUM_PORTS];
bool pvid_enabled[RTL8366RB_NUM_PORTS];
+ struct rtl8366rb_led leds[RTL8366RB_NUM_PORTS][RTL8366RB_NUM_LEDGROUPS];
};
static struct rtl8366_mib_counter rtl8366rb_mib_counters[] = {
@@ -806,6 +826,207 @@ static int rtl8366rb_jam_table(const struct rtl8366rb_jam_tbl_entry *jam_table,
return 0;
}
+static int rb8366rb_set_ledgroup_mode(struct realtek_priv *priv,
+ u8 led_group,
+ enum rtl8366_led_mode mode)
+{
+ int ret;
+ u32 val;
+
+ val = mode << RTL8366RB_LED_CTRL_OFFSET(led_group);
+
+ ret = regmap_update_bits(priv->map,
+ RTL8366RB_LED_CTRL_REG,
+ RTL8366RB_LED_CTRL_MASK(led_group),
+ val);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static inline u32 rtl8366rb_led_group_port_mask(u8 led_group, u8 port)
+{
+ switch (led_group) {
+ case 0:
+ return FIELD_PREP(RTL8366RB_LED_0_X_CTRL_MASK, BIT(port));
+ case 1:
+ return FIELD_PREP(RTL8366RB_LED_0_X_CTRL_MASK, BIT(port));
+ case 2:
+ return FIELD_PREP(RTL8366RB_LED_0_X_CTRL_MASK, BIT(port));
+ case 3:
+ return FIELD_PREP(RTL8366RB_LED_0_X_CTRL_MASK, BIT(port));
+ default:
+ return 0;
+ }
+}
+
+static int rb8366rb_get_port_led(struct rtl8366rb_led *led, bool enable)
+{
+ struct realtek_priv *priv = led->priv;
+ u8 led_group = led->led_group;
+ u8 port_num = led->port_num;
+ int ret;
+ u32 val;
+
+ if (led_group >= RTL8366RB_NUM_LEDGROUPS) {
+ dev_err(priv->dev, "Invalid LED group %d for port %d",
+ led_group, port_num);
+ return -EINVAL;
+ }
+
+ ret = regmap_read(priv->map, RTL8366RB_LED_X_X_CTRL_REG(led_group),
+ &val);
+ if (ret) {
+ dev_err(priv->dev, "error reading LED on port %d group %d\n",
+ led_group, port_num);
+ return ret;
+ }
+
+ return !!(val & rtl8366rb_led_group_port_mask(led_group, port_num));
+}
+
+static int rb8366rb_set_port_led(struct rtl8366rb_led *led, bool enable)
+{
+ struct realtek_priv *priv = led->priv;
+ u8 led_group = led->led_group;
+ u8 port_num = led->port_num;
+ int ret;
+
+ if (led_group >= RTL8366RB_NUM_LEDGROUPS) {
+ dev_err(priv->dev, "Invalid LED group %d for port %d",
+ led_group, port_num);
+ return -EINVAL;
+ }
+
+ ret = regmap_update_bits(priv->map,
+ RTL8366RB_LED_X_X_CTRL_REG(led_group),
+ rtl8366rb_led_group_port_mask(led_group,
+ port_num),
+ enable ? 0xffff : 0);
+ if (ret) {
+ dev_err(priv->dev, "error updating LED on port %d group %d\n",
+ led_group, port_num);
+ return ret;
+ }
+
+ /* Change the LED group to manual controlled LEDs if required */
+ ret = rb8366rb_set_ledgroup_mode(priv, led_group, RTL8366RB_LED_FORCE);
+
+ if (ret) {
+ dev_err(priv->dev, "error updating LED GROUP group %d\n",
+ led_group);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int
+rtl8366rb_cled_brightness_set_blocking(struct led_classdev *ldev,
+ enum led_brightness brightness)
+{
+ struct rtl8366rb_led *led = container_of(ldev, struct rtl8366rb_led,
+ cdev);
+
+ return rb8366rb_set_port_led(led, brightness == LED_ON);
+}
+
+static int rtl8366rb_setup_led(struct realtek_priv *priv, struct dsa_port *dp,
+ struct fwnode_handle *led_fwnode)
+{
+ struct rtl8366rb *rb = priv->chip_data;
+ struct led_init_data init_data = { };
+ struct rtl8366rb_led *led;
+ enum led_default_state state;
+ u32 led_group;
+ int ret;
+
+ ret = fwnode_property_read_u32(led_fwnode, "reg", &led_group);
+ if (ret)
+ return ret;
+
+ if (led_group >= RTL8366RB_NUM_LEDGROUPS) {
+ dev_warn(priv->dev, "Invalid LED reg %d defined for port %d",
+ led_group, dp->index);
+ return -EINVAL;
+ }
+
+ led = &rb->leds[dp->index][led_group];
+ led->port_num = dp->index;
+ led->led_group = led_group;
+ led->priv = priv;
+
+ state = led_init_default_state_get(led_fwnode);
+ switch (state) {
+ case LEDS_DEFSTATE_ON:
+ led->cdev.brightness = 1;
+ rb8366rb_set_port_led(led, 1);
+ break;
+ case LEDS_DEFSTATE_KEEP:
+ led->cdev.brightness =
+ rb8366rb_get_port_led(led, 1);
+ break;
+ case LEDS_DEFSTATE_OFF:
+ default:
+ led->cdev.brightness = 0;
+ rb8366rb_set_port_led(led, 0);
+ }
+
+ led->cdev.max_brightness = 1;
+ led->cdev.brightness_set_blocking =
+ rtl8366rb_cled_brightness_set_blocking;
+ init_data.fwnode = led_fwnode;
+ init_data.devname_mandatory = true;
+
+ init_data.devicename = kasprintf(GFP_KERNEL, "Realtek-%d:0%d:%d",
+ dp->ds->index, dp->index, led_group);
+ if (!init_data.devicename)
+ return -ENOMEM;
+
+ ret = devm_led_classdev_register_ext(priv->dev, &led->cdev, &init_data);
+ if (ret) {
+ dev_warn(priv->dev, "Failed to init LED %d for port %d",
+ led_group, dp->index);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int rtl8366rb_setup_leds(struct realtek_priv *priv)
+{
+ struct device_node *leds_np, *led_np;
+ struct dsa_port *dp;
+ int ret;
+
+ dsa_switch_for_each_port(dp, priv->ds) {
+ if (!dp->dn)
+ continue;
+
+ leds_np = of_get_child_by_name(dp->dn, "leds");
+ if (!leds_np) {
+ dev_dbg(priv->dev, "No leds defined for port %d",
+ dp->index);
+ continue;
+ }
+
+ for_each_child_of_node(leds_np, led_np) {
+ ret = rtl8366rb_setup_led(priv, dp,
+ of_fwnode_handle(led_np));
+ if (ret) {
+ of_node_put(led_np);
+ break;
+ }
+ }
+
+ of_node_put(leds_np);
+ if (ret)
+ return ret;
+ }
+ return 0;
+}
+
static int rtl8366rb_setup(struct dsa_switch *ds)
{
struct realtek_priv *priv = ds->priv;
@@ -814,7 +1035,6 @@ static int rtl8366rb_setup(struct dsa_switch *ds)
u32 chip_ver = 0;
u32 chip_id = 0;
int jam_size;
- u32 val;
int ret;
int i;
@@ -1014,14 +1234,15 @@ static int rtl8366rb_setup(struct dsa_switch *ds)
0);
for (i = 0; i < RTL8366RB_NUM_LEDGROUPS; i++) {
- val = RTL8366RB_LED_OFF << RTL8366RB_LED_CTRL_OFFSET(i);
- ret = regmap_update_bits(priv->map,
- RTL8366RB_LED_CTRL_REG,
- RTL8366RB_LED_CTRL_MASK(i),
- val);
+ ret = rb8366rb_set_ledgroup_mode(priv, i,
+ RTL8366RB_LED_OFF);
if (ret)
return ret;
}
+ } else {
+ ret = rtl8366rb_setup_leds(priv);
+ if (ret)
+ return ret;
}
ret = rtl8366_reset_vlan(priv);
--
2.43.0
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