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net: dsa: microchip: ksz_common: add single led mode support for ksz9477

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Signed-off-by: Heinrich Toews <ht@twx-software.de>
This commit is contained in:
Heinrich Toews
2025-11-27 16:06:06 +01:00
parent f7bef5c22d
commit e9a7a7db80
2 changed files with 45 additions and 0 deletions
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drivers/net/dsa/microchip/ksz_common.c
+41
View File
@@ -447,6 +447,9 @@ static const u16 ksz9477_regs[] = {
[S_MULTICAST_CTRL] = 0x0331, [S_MULTICAST_CTRL] = 0x0331,
[P_XMII_CTRL_0] = 0x0300, [P_XMII_CTRL_0] = 0x0300,
[P_XMII_CTRL_1] = 0x0301, [P_XMII_CTRL_1] = 0x0301,
[P_PHY_MMD_SETUP] = 0x011A,
[P_PHY_MMD_DATA] = 0x011C,
[P_PHY_DIGITAL_DEBUG_3] = 0x013C,
}; };
static const u32 ksz9477_masks[] = { static const u32 ksz9477_masks[] = {
@@ -2955,6 +2958,39 @@ static void ksz_set_gbit(struct ksz_device *dev, int port, bool gbit)
ksz_pwrite8(dev, port, regs[P_XMII_CTRL_1], data8); ksz_pwrite8(dev, port, regs[P_XMII_CTRL_1], data8);
} }
static void ksz_enable_single_led_mode(struct ksz_device *dev, int port)
{
const u16 *regs = dev->info->regs;
u16 data16;
dev_info(dev->dev, "port-%d: enable single-led mode.\n", port);
/* Set up register address for MMD */
data16 = 0x0002;
ksz_pwrite16(dev, port, regs[P_PHY_MMD_SETUP], data16);
/* Select Register 00h of MMD */
data16 = 0x0000;
ksz_pwrite16(dev, port, regs[P_PHY_MMD_DATA], data16);
/* Select register data for MMD */
data16 = 0x4002;
ksz_pwrite16(dev, port, regs[P_PHY_MMD_SETUP], data16);
/* Write value 0010h to MMD */
data16 = 0x0011;
ksz_pwrite16(dev, port, regs[P_PHY_MMD_DATA], data16);
/* Due to Errata Module 19 this workaround is needed to
* enable single-led mode. It has also to be a 32bit
* write.
*/
dev_info(dev->dev, "port-%d: applying errata (Module 19) " \
"workaround.\n", port);
data16 = 0xfa00;
ksz_pwrite16(dev, port, regs[P_PHY_DIGITAL_DEBUG_3], data16);
}
static void ksz_set_100_10mbit(struct ksz_device *dev, int port, int speed) static void ksz_set_100_10mbit(struct ksz_device *dev, int port, int speed)
{ {
const u8 *bitval = dev->info->xmii_ctrl0; const u8 *bitval = dev->info->xmii_ctrl0;
@@ -3020,6 +3056,9 @@ static void ksz9477_phylink_mac_link_up(struct ksz_device *dev, int port,
{ {
struct ksz_port *p; struct ksz_port *p;
if (dev->single_led_mode && port != dev->cpu_port)
ksz_enable_single_led_mode(dev, port);
p = &dev->ports[port]; p = &dev->ports[port];
/* Internal PHYs */ /* Internal PHYs */
@@ -3744,6 +3783,8 @@ int ksz_switch_register(struct ksz_device *dev)
ret = of_property_read_u8(dev->dev->of_node, "microchip,led-mode", &dev->led_mode); ret = of_property_read_u8(dev->dev->of_node, "microchip,led-mode", &dev->led_mode);
if (ret) if (ret)
dev->led_mode = 0; dev->led_mode = 0;
dev->single_led_mode = of_property_read_bool(dev->dev->of_node,
"microchip,single-led-mode");
} }
ret = dsa_register_switch(dev->ds); ret = dsa_register_switch(dev->ds);
drivers/net/dsa/microchip/ksz_common.h
+4
View File
@@ -150,6 +150,7 @@ struct ksz_device {
struct gpio_desc *reset_gpio; /* Optional reset GPIO */ struct gpio_desc *reset_gpio; /* Optional reset GPIO */
bool disable_internal_ldo; /* Disable internal 1.8V LDO */ bool disable_internal_ldo; /* Disable internal 1.8V LDO */
u8 led_mode; u8 led_mode;
bool single_led_mode; /* Enable Single LED Mode */
/* chip specific data */ /* chip specific data */
u32 chip_id; u32 chip_id;
u8 chip_rev; u8 chip_rev;
@@ -232,6 +233,9 @@ enum ksz_regs {
S_MULTICAST_CTRL, S_MULTICAST_CTRL,
P_XMII_CTRL_0, P_XMII_CTRL_0,
P_XMII_CTRL_1, P_XMII_CTRL_1,
P_PHY_MMD_SETUP,
P_PHY_MMD_DATA,
P_PHY_DIGITAL_DEBUG_3,
}; };
enum ksz_masks { enum ksz_masks {