On 03/15/2018 12:39 PM, Grygorii Strashko wrote:
On 03/15/2018 11:56 AM, SZ Lin (林上智) wrote:
According to AM335x TRM[1] 14.3.6.2, AM437x TRM[2] 15.3.6.2 and
DRA7 TRM[3] 24.11.4.8.7.3.3, in-band mode in EXT_EN(bit18) register is
only
available when PHY is configured in RGMII mode with 10Mbps speed. It will
cause some networking issues without RGMII mode, such as carrier sense
errors and low throughput. TI also mentioned this issue in their
forum[4].
This patch adds the check mechanism for PHY interface with RGMII
interface
type, the in-band mode can only be set in RGMII mode with 10Mbps speed.
References:
[1]: https://www.ti.com/lit/ug/spruh73p/spruh73p.pdf
[2]: http://www.ti.com/lit/ug/spruhl7h/spruhl7h.pdf
[3]: http://www.ti.com/lit/ug/spruic2b/spruic2b.pdf
[4]: https://e2e.ti.com/support/arm/sitara_arm/f/791/p/640765/2392155
Suggested-by: Holsety Chen (陳憲輝) <Holsety.Chen@xxxxxxxx>
Signed-off-by: SZ Lin (林上智) <sz.lin@xxxxxxxx>
Signed-off-by: Schuyler Patton <spatton@xxxxxx>
---
Changes from v1:
- Use phy_interface_is_rgmii helper function
- Remove blank line
Reviewed-by: Grygorii Strashko <grygorii.strashko@xxxxxx>
Also could this be marked as stable material 4.9+?
--
regards,
-grygorii
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