ppc4xx: Enable auto RS485 mode on PLU405 boards
PATCH 1/1 ppc4xx: Enable auto RS485 mode on PLU405 boards
This patch turns on the auto RS485 mode in the 2nd external uart on PLU405 boards. This is a special mode of the used Exar XR16C2850 uart. Because these boards only have a 485 physical layer connected it's a good idea to turn it on by default.
--- board/esd/plu405/plu405.c | 10 ++++++++++ 1 files changed, 10 insertions(+), 0 deletions(-)
board/esd/plu405/plu405.c +10 -0
@@ -104,6 +104,7 @@ int misc_init_r (void)unsigned char *duart0_mcr = (unsigned char *)((ulong )DUART0_BA +4 );unsigned char *duart1_mcr = (unsigned char *)((ulong )DUART1_BA +4 );unsigned char *dst; +unsigned char fctr;ulong len =sizeof (fpgadata);int status;int index;
@@ -203,6 +204,15 @@ int misc_init_r (void)out_8 (duart0_mcr,0x08 );out_8 (duart1_mcr,0x08 ); +/* +* Enable auto RS485 mode in 2nd external uart +*/ +out_8 ((void *)DUART1_BA +3 ,0xbf );/* write LCR */ + fctr =in_8 ((void *)DUART1_BA +1 );/* read FCTR */ + fctr |=0x08 ;/* enable RS485 mode */ +out_8 ((void *)DUART1_BA +1 , fctr);/* write FCTR */ +out_8 ((void *)DUART1_BA +3 ,0 );/* write LCR */ +return (0 ); }
Signature · 1 line
1.5.6.3
PATCH v2 1/1 ppc4xx: Enable auto RS485 mode on PLU405 boards
2nd version of this patch eliminates a whitespace issue :-(
This patch turns on the auto RS485 mode in the 2nd external uart on PLU405 boards. This is a special mode of the used Exar XR16C2850 uart. Because these boards only have a 485 physical layer connected it's a good idea to turn it on by default.
--- board/esd/plu405/plu405.c | 10 ++++++++++ 1 files changed, 10 insertions(+), 0 deletions(-)
board/esd/plu405/plu405.c +10 -0
@@ -104,6 +104,7 @@ int misc_init_r (void)unsigned char *duart0_mcr = (unsigned char *)((ulong )DUART0_BA +4 );unsigned char *duart1_mcr = (unsigned char *)((ulong )DUART1_BA +4 );unsigned char *dst; +unsigned char fctr;ulong len =sizeof (fpgadata);int status;int index;
@@ -203,6 +204,15 @@ int misc_init_r (void)out_8 (duart0_mcr,0x08 );out_8 (duart1_mcr,0x08 ); +/* +* Enable auto RS485 mode in 2nd external uart +*/ +out_8 ((void *)DUART1_BA +3 ,0xbf );/* write LCR */ + fctr =in_8 ((void *)DUART1_BA +1 );/* read FCTR */ + fctr |=0x08 ;/* enable RS485 mode */ +out_8 ((void *)DUART1_BA +1 , fctr);/* write FCTR */ +out_8 ((void *)DUART1_BA +3 ,0 );/* write LCR */ +return (0 ); }
Signature · 1 line
1.5.6.3
PATCH v2 1/1 ppc4xx: Enable auto RS485 mode on PLU405 boards
Quoted 1 line · Matthias Fuchs
2nd version of this patch eliminates a whitespace issue :-(
Please put such statements below the "---" next time. They don't really should be included in the commit text. And it's always helpful to have a patch revision description (changes in ver1: ... changes in ver2: ... etc) below the "---".
I removed this line for now so no need to resend now.
Quoted 6 lines
This patch turns on the auto RS485 mode in the 2nd external uart on PLU405 boards. This is a special mode of the used Exar XR16C2850 uart. Because these boards only have a 485 physical layer connected it's a good idea to turn it on by default.
Signed-off-by Matthias Fuchs <[email protected]>
Added to u-boot/master.
Thanks.
Best regards,
Stefan
=====================================================================
DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: +49-8142-66989-0 Fax: +49-8142-66989-80 Email: office at denx.de
=====================================================================