On Fri, Apr 26, 2013 at 11:01 AM, Fabio Estevam festevam@gmail.com wrote:
From: Fabio Estevam fabio.estevam@freescale.com
commit 5c2f444c9 (mxs: Reset the EMI block on mx23) changed the DDR voltage level, which causes mx23evk to fail to load a kernel.
Put back the original values, so that mx23evk can boot a kernel again.
Signed-off-by: Fabio Estevam fabio.estevam@freescale.com
Tested-by: Robert Nelson robertcnelson@gmail.com
arch/arm/cpu/arm926ejs/mxs/spl_mem_init.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/arm/cpu/arm926ejs/mxs/spl_mem_init.c b/arch/arm/cpu/arm926ejs/mxs/spl_mem_init.c index bc2d69c..4950490 100644 --- a/arch/arm/cpu/arm926ejs/mxs/spl_mem_init.c +++ b/arch/arm/cpu/arm926ejs/mxs/spl_mem_init.c @@ -234,7 +234,7 @@ static void mx23_mem_setup_vddmem(void) struct mxs_power_regs *power_regs = (struct mxs_power_regs *)MXS_POWER_BASE;
writel((0x10 << POWER_VDDMEMCTRL_TRG_OFFSET) |
writel((0x12 << POWER_VDDMEMCTRL_TRG_OFFSET) | POWER_VDDMEMCTRL_ENABLE_ILIMIT | POWER_VDDMEMCTRL_ENABLE_LINREG | POWER_VDDMEMCTRL_PULLDOWN_ACTIVE,@@ -242,7 +242,7 @@ static void mx23_mem_setup_vddmem(void)
early_delay(10000);
writel((0x10 << POWER_VDDMEMCTRL_TRG_OFFSET) |
writel((0x12 << POWER_VDDMEMCTRL_TRG_OFFSET) | POWER_VDDMEMCTRL_ENABLE_LINREG, &power_regs->hw_power_vddmemctrl);}
1.7.9.5
Sweet! This fixes the random memory issues I was seeing on my imx233-oLinuXno-Micro when using u-boot..
I Used memtester for memory verification..
u-boot v2013.04 & v3.9-rc7
root@arm:/home/debian# memtester 24M memtester version 4.2.2 (32-bit) Copyright (C) 2010 Charles Cazabon. Licensed under the GNU General Public License version 2 (only).
pagesize is 4096 pagesizemask is 0xfffff000 want 24MB (25165824 bytes) got 24MB (25165824 bytes), trying mlock ...locked. Loop 1: Stuck Address : ok Random Value : ok Compare XOR : ok Compare SUB : ok Compare MUL : ok Compare DIV : ok Compare OR : ok Compare AND : ok Sequential Increment: ok Solid Bits : ok Block Sequential : testing 254FAILURE: 0xfefefefe != 0xfefe00fe at offset 0x002c11bc. Checkerboard : setting 37^C
u-boot v2013.04 + mx23: Put back RAM voltage level to its original valueu-boot & v3.9-rc7
root@arm:/home/debian# memtester 24M memtester version 4.2.2 (32-bit) Copyright (C) 2010 Charles Cazabon. Licensed under the GNU General Public License version 2 (only).
pagesize is 4096 pagesizemask is 0xfffff000 want 24MB (25165824 bytes) got 24MB (25165824 bytes), trying mlock ...locked. Loop 1: Stuck Address : ok Random Value : ok Compare XOR : ok Compare SUB : ok Compare MUL : ok Compare DIV : ok Compare OR : ok Compare AND : ok Sequential Increment: ok Solid Bits : ok Block Sequential : ok Checkerboard : ok Bit Spread : ok Bit Flip : ok Walking Ones : ok Walking Zeroes : ok 8-bit Writes : ok 16-bit Writes : ok
Loop 2: Stuck Address : ok
root@arm:/home/debian# cat /proc/cpuinfo processor : 0 model name : ARM926EJ-S rev 5 (v5l) BogoMIPS : 226.09 Features : swp half thumb fastmult edsp java CPU implementer : 0x41 CPU architecture: 5TEJ CPU variant : 0x0 CPU part : 0x926 CPU revision : 5
Hardware : Freescale i.MX23 (Device Tree) Revision : 0000 Serial : 0000000000000000
root@arm:/home/debian# uname -a Linux arm 3.9.0-rc7-imxv5-x0.9 #2 Thu Apr 25 15:27:14 CDT 2013 armv5tejl GNU/Linux
Regards,