* [U-Boot] [PATCH] EfikaMX: Adjust undocumented magic constant in config file
@ 2011-09-15 4:16 Marek Vasut
2011-09-22 9:46 ` Stefano Babic
0 siblings, 1 reply; 2+ messages in thread
From: Marek Vasut @ 2011-09-15 4:16 UTC (permalink / raw)
To: u-boot
This magic constant with zero documentation, when it's last 8 bits are set to
0x45, configures correctly the PERCLK dividers. Therefore the I2C operates
correctly when divider computed from PERCLK.
Note: This constant is written to CBCDR register in
arch/arm/cpu/armv7/mx5/lowlevel_init.S, but it's written only once. The register
is accessed three more times in the file, with different values written to it
each time.
Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
---
include/configs/efikamx.h | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/include/configs/efikamx.h b/include/configs/efikamx.h
index d4e77c2..1fa29d2 100644
--- a/include/configs/efikamx.h
+++ b/include/configs/efikamx.h
@@ -284,6 +284,6 @@
(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_SP_OFFSET)
#define CONFIG_SYS_DDR_CLKSEL 0
-#define CONFIG_SYS_CLKTL_CBCDR 0x59E35100
+#define CONFIG_SYS_CLKTL_CBCDR 0x59E35145
#endif
--
1.7.5.4
^ permalink raw reply related [flat|nested] 2+ messages in thread
* [U-Boot] [PATCH] EfikaMX: Adjust undocumented magic constant in config file
2011-09-15 4:16 [U-Boot] [PATCH] EfikaMX: Adjust undocumented magic constant in config file Marek Vasut
@ 2011-09-22 9:46 ` Stefano Babic
0 siblings, 0 replies; 2+ messages in thread
From: Stefano Babic @ 2011-09-22 9:46 UTC (permalink / raw)
To: u-boot
On 09/15/2011 06:16 AM, Marek Vasut wrote:
> This magic constant with zero documentation, when it's last 8 bits are set to
> 0x45, configures correctly the PERCLK dividers. Therefore the I2C operates
> correctly when divider computed from PERCLK.
>
> Note: This constant is written to CBCDR register in
> arch/arm/cpu/armv7/mx5/lowlevel_init.S, but it's written only once. The register
> is accessed three more times in the file, with different values written to it
> each time.
>
> Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
> ---
> include/configs/efikamx.h | 2 +-
> 1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/include/configs/efikamx.h b/include/configs/efikamx.h
> index d4e77c2..1fa29d2 100644
> --- a/include/configs/efikamx.h
> +++ b/include/configs/efikamx.h
> @@ -284,6 +284,6 @@
> (CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_SP_OFFSET)
>
> #define CONFIG_SYS_DDR_CLKSEL 0
> -#define CONFIG_SYS_CLKTL_CBCDR 0x59E35100
> +#define CONFIG_SYS_CLKTL_CBCDR 0x59E35145
>
> #endif
Applied to u-boot-imx, next branch.
Best regards,
Stefano Babic
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2011-09-15 4:16 [U-Boot] [PATCH] EfikaMX: Adjust undocumented magic constant in config file Marek Vasut
2011-09-22 9:46 ` Stefano Babic
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