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net: ti: cpsw: enable 10Mbps link speed support in rgmii mode

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According to TRMs the 10Mbps link speed is supported in RGMII only when
CPSW2G MAC SL is configured for External Control ("in band") mode
CPSW_SL_MACCTRL.EXT_EN(18) = 1.

Hence update cpsw_slave_update_link() to follow documentation.

[1] https://patchwork.kernel.org/patch/10285239/
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
This commit is contained in:
Grygorii Strashko 2019-09-19 11:16:37 +03:00 committed by Tom Rini
parent 3b3e8a37d3
commit 60e81d0d28
1 changed files with 3 additions and 0 deletions
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3
drivers/net/ti/cpsw.c
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@ -33,6 +33,7 @@ DECLARE_GLOBAL_DATA_PTR;
#define GIGABITEN BIT(7) #define GIGABITEN BIT(7)
#define FULLDUPLEXEN BIT(0) #define FULLDUPLEXEN BIT(0)
#define MIIEN BIT(15) #define MIIEN BIT(15)
#define CTL_EXT_EN BIT(18)
/* DMA Registers */ /* DMA Registers */
#define CPDMA_TXCONTROL 0x004 #define CPDMA_TXCONTROL 0x004
#define CPDMA_RXCONTROL 0x014 #define CPDMA_RXCONTROL 0x014
@ -489,6 +490,8 @@ static int cpsw_slave_update_link(struct cpsw_slave *slave,
mac_control |= FULLDUPLEXEN; mac_control |= FULLDUPLEXEN;
if (phy->speed == 100) if (phy->speed == 100)
mac_control |= MIIEN; mac_control |= MIIEN;
if (phy->speed == 10 && phy_interface_is_rgmii(phy))
mac_control |= CTL_EXT_EN;
} }
if (mac_control == slave->mac_control) if (mac_control == slave->mac_control)