lkml.org 
[lkml]   [2007]   [Aug]   [24]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
SubjectRe: [PATCH] at91 pm: Compilation fix for at91sam926x
From
Date
hi,

> > About SDRAm self refresh mode on at91sam926x, in fact AT91_SDRAMC_SRR
> > doesn't exist but the new register is AT91_SDRAMC_LPR. So for instance, you
> > can replace at91_sys_write(AT91_SDRAMC_SRR, 1) by
> > at91_sys_write(AT91_SDRAMC_LPR, AT91_SDRAMC_LPCB_SELF_REFRESH).
>
> I have also made that change in pm.c.

I think we will go with the following change for now.
We need to pull in different header files anyway.

(This file will need to be re-looked at if we ever allow compiling a
single kernel image that supports multiple AT91 processors)


--- pm.c 6 Jul 2007 09:18:01 -0000 1.5
+++ pm.c 24 Aug 2007 07:22:13 -0000
@@ -27,12 +27,24 @@
#include <asm/mach-types.h>

#include <asm/arch/at91_pmc.h>
-#include <asm/arch/at91rm9200_mc.h>
#include <asm/arch/gpio.h>
#include <asm/arch/cpu.h>

#include "generic.h"

+#ifdef CONFIG_ARCH_AT91RM9200
+#include <asm/arch/at91rm9200_mc.h>
+
+#define sdram_selfrefresh_enable() at91_sys_write(AT91_SDRAMC_SRR, 1)
+#define sdram_selfrefresh_disable()
+
+#else
+#include <asm/arch/at91sam926x_mc.h>
+
+#define sdram_selfrefresh_enable() at91_sys_write(AT91_SDRAMC_LPR, AT91_SDRAMC_LPCB_SELF_REFRESH)
+#define sdram_selfrefresh_disable() at91_sys_write(AT91_SDRAMC_LPR, AT91_SDRAMC_LPCB_DISABLE)
+
+#endif

static int at91_pm_valid_state(suspend_state_t state)
{
@@ -172,7 +184,7 @@
*/
asm("b 1f; .align 5; 1:");
asm("mcr p15, 0, r0, c7, c10, 4"); /* drain write buffer */
- at91_sys_write(AT91_SDRAMC_SRR, 1); /* self-refresh mode */
+ sdram_selfrefresh_enable(); /* self-refresh mode */
/* fall though to next state */

case PM_SUSPEND_ON:
@@ -188,6 +200,7 @@
at91_sys_read(AT91_AIC_IPR) & at91_sys_read(AT91_AIC_IMR));

error:
+ sdram_selfrefresh_disable();
target_state = PM_SUSPEND_ON;
at91_irq_resume();
at91_gpio_resume();

Regards,
Andrew Victor


-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2007-08-24 09:41    [W:0.231 / U:0.840 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site