Commit 92ba3307 authored by Nicolai Buchwitz's avatar Nicolai Buchwitz Committed by Jakub Kicinski
Browse files

net: cadence: macb: enable EEE for Raspberry Pi RP1 



Set MACB_CAPS_EEE for the Raspberry Pi 5 RP1 southbridge
(Cadence GEM_GXL rev 0x00070109 paired with BCM54213PE PHY).

EEE has been verified on RP1 hardware: the LPI counter registers
at 0x270-0x27c return valid data, the TXLPIEN bit in NCR (bit 19)
controls LPI transmission correctly, and ethtool --show-eee reports
the negotiated state after link-up.

Other GEM variants that share the same LPI register layout (SAMA5D2,
SAME70, PIC32CZ) can be enabled by adding MACB_CAPS_EEE to their
respective config entries once tested.

Reviewed-by: default avatarClaudiu Beznea <claudiu.beznea@tuxon.dev>
Reviewed-by: default avatarThéo Lebrun <theo.lebrun@bootlin.com>
Signed-off-by: default avatarNicolai Buchwitz <nb@tipi-net.de>
Link: https://patch.msgid.link/20260304105432.631186-5-nb@tipi-net.de


Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent 61332b78

drivers/net/ethernet/cadence/macb_main.c

+2 −1
Original line number Diff line number Diff line
@@ -5537,7 +5537,8 @@ static const struct macb_config eyeq5_config = { 
static const struct macb_config raspberrypi_rp1_config = {

	.caps = MACB_CAPS_GIGABIT_MODE_AVAILABLE | MACB_CAPS_CLK_HW_CHG |

		MACB_CAPS_JUMBO |

		MACB_CAPS_GEM_HAS_PTP,

		MACB_CAPS_GEM_HAS_PTP |

		MACB_CAPS_EEE,

	.dma_burst_length = 16,

	.clk_init = macb_clk_init,

	.init = macb_init,