From 9bf5085aaaadd6488a0ea6121e0cb7dadaf0652a Mon Sep 17 00:00:00 2001 From: Chen-Yu Tsai Date: Mon, 14 May 2018 03:14:25 +0800 Subject: [PATCH] net: stmmac: dwmac-sun8i: Add support for GMAC on Allwinner R40 SoC The Allwinner R40 SoC has the EMAC controller supported by dwmac-sun8i. It is named "GMAC", while EMAC refers to the 10/100 Mbps Ethernet controller supported by sun4i-emac. The controller is the same, but the R40 has the glue layer controls in the clock control unit (CCU), with a reduced RX delay chain, and no TX delay chain. This patch adds support for it using the framework laid out by previous patches to map the differences. Signed-off-by: Chen-Yu Tsai Acked-by: Maxime Ripard Signed-off-by: David S. Miller --- .../net/ethernet/stmicro/stmmac/dwmac-sun8i.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c index 4f5612a3c855..2f7f0915f071 100644 --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c @@ -93,6 +93,13 @@ static const struct reg_field sun8i_syscon_reg_field = { .msb = 31, }; +/* EMAC clock register @ 0x164 in the CCU address range */ +static const struct reg_field sun8i_ccu_reg_field = { + .reg = 0x164, + .lsb = 0, + .msb = 31, +}; + static const struct emac_variant emac_variant_h3 = { .default_syscon_value = 0x58000, .syscon_field = &sun8i_syscon_reg_field, @@ -121,6 +128,14 @@ static const struct emac_variant emac_variant_a83t = { .tx_delay_max = 7, }; +static const struct emac_variant emac_variant_r40 = { + .default_syscon_value = 0, + .syscon_field = &sun8i_ccu_reg_field, + .support_mii = true, + .support_rgmii = true, + .rx_delay_max = 7, +}; + static const struct emac_variant emac_variant_a64 = { .default_syscon_value = 0, .syscon_field = &sun8i_syscon_reg_field, @@ -1160,6 +1175,8 @@ static const struct of_device_id sun8i_dwmac_match[] = { .data = &emac_variant_v3s }, { .compatible = "allwinner,sun8i-a83t-emac", .data = &emac_variant_a83t }, + { .compatible = "allwinner,sun8i-r40-gmac", + .data = &emac_variant_r40 }, { .compatible = "allwinner,sun50i-a64-emac", .data = &emac_variant_a64 }, { } -- 2.30.2