* [U-Boot] [PATCH v4] Allow AM335x MPU core clock speed to be specified in the board config file
@ 2013-03-04 11:27 Mark Jackson
2013-03-04 12:55 ` Peter Korsgaard
2013-03-26 14:52 ` [U-Boot] [U-Boot, " Tom Rini
0 siblings, 2 replies; 3+ messages in thread
From: Mark Jackson @ 2013-03-04 11:27 UTC (permalink / raw)
To: u-boot
Allow AM335x MPU core clock speed to be specified in the board config file.
To use, add the following to the board's config file:-
#define CONFIG_SYS_MPUCLK <desired clock freq in MHz>
Signed-off-by: Mark Jackson <mpfj@newflow.co.uk>
---
Changes in v4:
- Now defined as MHz (not Hz)
Changes in v3:
- Changed from V_MPUCLK to CONFIG_SYS_MPUCLK
- Added entry in README
Changes in v2:
- Tweaked after comments from Peter Korsgaard
README | 4 ++++
arch/arm/include/asm/arch-am33xx/clocks_am33xx.h | 7 +++++--
2 files changed, 9 insertions(+), 2 deletions(-)
diff --git a/README b/README
index d8cb394..ddf6df2 100644
--- a/README
+++ b/README
@@ -3820,6 +3820,10 @@ Low Level (hardware related) configuration options:
If defined, the x86 reset vector code is included. This is not
needed when U-Boot is running from Coreboot.
+- CONFIG_SYS_MPUCLK
+ Defines the MPU clock speed (in MHz).
+
+ NOTE : currently only supported on AM335x platforms.
Freescale QE/FMAN Firmware Support:
-----------------------------------
diff --git a/arch/arm/include/asm/arch-am33xx/clocks_am33xx.h b/arch/arm/include/asm/arch-am33xx/clocks_am33xx.h
index d748dd2..2d96007 100644
--- a/arch/arm/include/asm/arch-am33xx/clocks_am33xx.h
+++ b/arch/arm/include/asm/arch-am33xx/clocks_am33xx.h
@@ -21,8 +21,11 @@
#define OSC (V_OSCK/1000000)
-/* MAIN PLL Fdll = 550 MHZ, */
-#define MPUPLL_M 550
+/* MAIN PLL Fdll = 550 MHz, by default */
+#ifndef CONFIG_SYS_MPUCLK
+#define CONFIG_SYS_MPUCLK 550
+#endif
+#define MPUPLL_M CONFIG_SYS_MPUCLK
#define MPUPLL_N (OSC-1)
#define MPUPLL_M2 1
--
1.7.9.5
^ permalink raw reply related [flat|nested] 3+ messages in thread
* [U-Boot] [PATCH v4] Allow AM335x MPU core clock speed to be specified in the board config file
2013-03-04 11:27 [U-Boot] [PATCH v4] Allow AM335x MPU core clock speed to be specified in the board config file Mark Jackson
@ 2013-03-04 12:55 ` Peter Korsgaard
2013-03-26 14:52 ` [U-Boot] [U-Boot, " Tom Rini
1 sibling, 0 replies; 3+ messages in thread
From: Peter Korsgaard @ 2013-03-04 12:55 UTC (permalink / raw)
To: u-boot
>>>>> "Mark" == Mark Jackson <mpfj-list@mimc.co.uk> writes:
Mark> Allow AM335x MPU core clock speed to be specified in the board config file.
Mark> To use, add the following to the board's config file:-
Mark> #define CONFIG_SYS_MPUCLK <desired clock freq in MHz>
Mark> Signed-off-by: Mark Jackson <mpfj@newflow.co.uk>
Acked-by: Peter Korsgaard <jacmet@sunsite.dk>
--
Bye, Peter Korsgaard
^ permalink raw reply [flat|nested] 3+ messages in thread
* [U-Boot] [U-Boot, v4] Allow AM335x MPU core clock speed to be specified in the board config file
2013-03-04 11:27 [U-Boot] [PATCH v4] Allow AM335x MPU core clock speed to be specified in the board config file Mark Jackson
2013-03-04 12:55 ` Peter Korsgaard
@ 2013-03-26 14:52 ` Tom Rini
1 sibling, 0 replies; 3+ messages in thread
From: Tom Rini @ 2013-03-26 14:52 UTC (permalink / raw)
To: u-boot
On Mon, Mar 04, 2013 at 01:27:20AM -0000, Mark Jackson wrote:
> Allow AM335x MPU core clock speed to be specified in the board config file.
> To use, add the following to the board's config file:-
>
> #define CONFIG_SYS_MPUCLK <desired clock freq in MHz>
>
> Signed-off-by: Mark Jackson <mpfj@newflow.co.uk>
> Acked-by: Peter Korsgaard <jacmet@sunsite.dk>
Applied to u-boot-ti/master (and already pulled into u-boot-arm),
thanks!
--
Tom
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2013-03-04 11:27 [U-Boot] [PATCH v4] Allow AM335x MPU core clock speed to be specified in the board config file Mark Jackson
2013-03-04 12:55 ` Peter Korsgaard
2013-03-26 14:52 ` [U-Boot] [U-Boot, " Tom Rini
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