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// SPDX-License-Identifier: GPL-2.0
#include <linux/bitops.h>
#include <linux/regmap.h>
#include <net/dsa.h>
#include "rtl83xx.h"
#include "rtl8366rb.h"
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)
{
struct realtek_priv *priv = led->priv;
u8 led_group = led->led_group;
u8 port_num = led->port_num;
int ret;
u32 val;
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;
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_LEDGROUP_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 = { };
enum led_default_state state;
struct rtl8366rb_led *led;
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);
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;
}
int rtl8366rb_setup_leds(struct realtek_priv *priv)
{
struct dsa_switch *ds = &priv->ds;
struct device_node *leds_np;
struct dsa_port *dp;
int ret = 0;
dsa_switch_for_each_port(dp, 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_scoped(leds_np, led_np) {
ret = rtl8366rb_setup_led(priv, dp,
of_fwnode_handle(led_np));
if (ret)
break;
}
of_node_put(leds_np);
if (ret)
return ret;
}
return 0;
}
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