-----Original Message----- From: Dirk Behme [mailto:dirk.behme@de.bosch.com] Sent: Tuesday, June 12, 2012 11:05 PM To: Fabio Estevam; Liu Hui-R64343 Cc: Vikram Narayanan; u-boot@lists.denx.de Subject: Re: [U-Boot] [PATCH] mx6: Avoid writing to read-only bits in imximage.cfg
On 12.06.2012 16:50, Vikram Narayanan wrote:
If in case this is valid according to the latest datasheet, ignore this patch.
-- According to REV C manual, the register IOMUXC_IOMUXC_GPR4 has bits 4 and 5 read-only and the value is always set as zero. So write '0' to these bits instead of writing '1'.
Jason, Fabio: What do you think? You should be the datasheet 'masters' ;)
Yes, according to the RM, 5 Reserved This read-only field is reserved and always has the value 0. 4 Reserved This read-only field is reserved and always has the value 0.
So, write 1 should have no effect.
Best regards
Dirk
Signed-off-by: Vikram Narayanan vikram186@gmail.com Cc: Jason Liu r64343@freescale.com Cc: Dirk Behme dirk.behme@googlemail.com
board/freescale/mx6qarm2/imximage.cfg | 2 +- board/freescale/mx6qsabrelite/imximage.cfg | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/board/freescale/mx6qarm2/imximage.cfg b/board/freescale/mx6qarm2/imximage.cfg index ceecbf9..bf941a3 100644 --- a/board/freescale/mx6qarm2/imximage.cfg +++ b/board/freescale/mx6qarm2/imximage.cfg @@ -167,7 +167,7 @@ DATA 4 0x020c407c 0x0F0000C3 DATA 4
0x020c4080
0x000003FF
# enable AXI cache for VDOA/VPU/IPU -DATA 4 0x020e0010 0xF00000FF +DATA 4 0x020e0010 0xF00000CF # set IPU AXI-id0 Qos=0xf(bypass) AXI-id1 Qos=0x7 DATA 4 0x020e0018 0x007F007F DATA 4 0x020e001c 0x007F007F diff --git a/board/freescale/mx6qsabrelite/imximage.cfg b/board/freescale/mx6qsabrelite/imximage.cfg index c389427..62498ab 100644 --- a/board/freescale/mx6qsabrelite/imximage.cfg +++ b/board/freescale/mx6qsabrelite/imximage.cfg @@ -164,7 +164,7 @@ DATA 4 0x020c407c 0x0F0000C3 DATA 4
0x020c4080
0x000003FF
# enable AXI cache for VDOA/VPU/IPU -DATA 4 0x020e0010 0xF00000FF +DATA 4 0x020e0010 0xF00000CF # set IPU AXI-id0 Qos=0xf(bypass) AXI-id1 Qos=0x7 DATA 4 0x020e0018 0x007F007F DATA 4 0x020e001c 0x007F007F