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as3525*: stop MPMCCLKOUT when all SDRAMs are idle

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Get a bit more battery life (between 30 minutes and 2 hours)

as3525v2: only enabled in bootloader, we need a new binary release anwyway
as3525v1: enabled in rockbox.sansa as well, so we can continue using the
current bootloaders

Flyspray: FS#11246
Author: myself

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@25900 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Rafaël Carré 2010-05-08 13:59:01 +00:00
parent fe29ad2edd
commit b269b7854f
1 changed files with 5 additions and 2 deletions
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7
firmware/target/arm/as3525/system-as3525.c
View file

@ -279,7 +279,8 @@ static void sdram_init(void)
"ldr r4, [%0]\n"
: : "p"(0x30000000+0x2300*MEM) : "r4");
MPMC_DYNAMIC_CONTROL = 0x2; /* SDRAM NORMAL, MPMCCLKOUT runs continuously */
/* SDRAM NORMAL, MPMCCLKOUT stopped when SDRAM is idle */
MPMC_DYNAMIC_CONTROL = 0x0;
MPMC_DYNAMIC_CONFIG_0 |= (1<<19); /* buffer enable */
}
@ -343,8 +344,10 @@ void system_init(void)
#endif
AS3525_PCLK_SEL);
#ifdef BOOTLOADER
#if defined(BOOTLOADER)
sdram_init();
#elif CONFIG_CPU == AS3525 /* XXX: remove me when we have a new bootloader */
MPMC_DYNAMIC_CONTROL = 0x0; /* MPMCCLKOUT stops when all SDRAMs are idle */
#endif /* BOOTLOADER */
#if 0 /* the GPIO clock is already enabled by the dualboot function */