diff options
| author | Álvaro Fernández Rojas <noltari@gmail.com> | 2025-06-14 10:00:00 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-08-20 18:41:18 +0200 |
| commit | 0c36fe9c855190bfc7ab50275fc773a2c51c46d3 (patch) | |
| tree | 71ba6422dae7f41fd6a8ff37f55615ba93439da4 | |
| parent | cc749ba3d206eea8959d9ed1c4dbec2aeb1fb853 (diff) | |
net: dsa: b53: ensure BCM5325 PHYs are enabled
[ Upstream commit 966a83df36c6f27476ac3501771422e7852098bc ]
According to the datasheet, BCM5325 uses B53_PD_MODE_CTRL_25 register to
disable clocking to individual PHYs.
Only ports 1-4 can be enabled or disabled and the datasheet is explicit
about not toggling BIT(0) since it disables the PLL power and the switch.
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
Link: https://patch.msgid.link/20250614080000.1884236-15-noltari@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/net/dsa/b53/b53_common.c | 13 | ||||
| -rw-r--r-- | drivers/net/dsa/b53/b53_regs.h | 5 |
2 files changed, 17 insertions, 1 deletions
diff --git a/drivers/net/dsa/b53/b53_common.c b/drivers/net/dsa/b53/b53_common.c index dc2f4adac9bc..184946e8cee9 100644 --- a/drivers/net/dsa/b53/b53_common.c +++ b/drivers/net/dsa/b53/b53_common.c @@ -615,6 +615,19 @@ int b53_setup_port(struct dsa_switch *ds, int port) if (dsa_is_user_port(ds, port)) b53_set_eap_mode(dev, port, EAP_MODE_SIMPLIFIED); + if (is5325(dev) && + in_range(port, 1, 4)) { + u8 reg; + + b53_read8(dev, B53_CTRL_PAGE, B53_PD_MODE_CTRL_25, ®); + reg &= ~PD_MODE_POWER_DOWN_PORT(0); + if (dsa_is_unused_port(ds, port)) + reg |= PD_MODE_POWER_DOWN_PORT(port); + else + reg &= ~PD_MODE_POWER_DOWN_PORT(port); + b53_write8(dev, B53_CTRL_PAGE, B53_PD_MODE_CTRL_25, reg); + } + return 0; } EXPORT_SYMBOL(b53_setup_port); diff --git a/drivers/net/dsa/b53/b53_regs.h b/drivers/net/dsa/b53/b53_regs.h index 1fbc5a204bc7..d31c8ad9a9b6 100644 --- a/drivers/net/dsa/b53/b53_regs.h +++ b/drivers/net/dsa/b53/b53_regs.h @@ -101,8 +101,11 @@ #define PORT_OVERRIDE_SPEED_2000M BIT(6) /* BCM5301X only, requires setting 1000M */ #define PORT_OVERRIDE_EN BIT(7) /* Use the register contents */ -/* Power-down mode control */ +/* Power-down mode control (8 bit) */ #define B53_PD_MODE_CTRL_25 0x0f +#define PD_MODE_PORT_MASK 0x1f +/* Bit 0 also powers down the switch. */ +#define PD_MODE_POWER_DOWN_PORT(i) BIT(i) /* IP Multicast control (8 bit) */ #define B53_IP_MULTICAST_CTRL 0x21 |