Re: [U-Boot] [PATCH 07/11] pxa: start.S: enable SRAM clock

On 03/21/2016 02:37 AM, Vasily Khoruzhick wrote:

SRAM is used for early stack, but kernel disables its clock on suspend. Re-enable SRAM clock on startup, otherwise u-boot crashes on resume from suspend.

Signed-off-by: Vasily Khoruzhick anarsoul@gmail.com

arch/arm/cpu/pxa/start.S | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/arch/arm/cpu/pxa/start.S b/arch/arm/cpu/pxa/start.S index 24b6ad1..ce1181a 100644 --- a/arch/arm/cpu/pxa/start.S +++ b/arch/arm/cpu/pxa/start.S @@ -53,7 +53,15 @@ reset: #ifdef CONFIG_CPU_PXA25X bl lock_cache_for_stack #endif

+#ifdef CONFIG_CPU_PXA27X

• /*

• * enable clock for SRAM
  

• */
  

• ldr r0,=CKEN
• ldr r1,[r0]
• orr r1,r1,#(1 << 20)

Don't we have a macro for this 1 << 20 already ?

• str r1,[r0]

+#endif bl _main

/*------------------------------------------------------------------------------*/