* [PATCH -queue] MIPS: Alchemy: devboard PM needs to save CPLD registers.
@ 2010-02-23 17:57 Manuel Lauss
2010-02-23 22:59 ` Ralf Baechle
0 siblings, 1 reply; 2+ messages in thread
From: Manuel Lauss @ 2010-02-23 17:57 UTC (permalink / raw)
To: Linux-MIPS; +Cc: Manuel Lauss
Save/restore CPLD registers when doing suspend-to-ram: fixes
issues with harddisk and ethernet not working correctly when
resuming on DB1200.
Signed-off-by: Manuel Lauss <manuel.lauss@gmail.com>
---
arch/mips/alchemy/devboards/pm.c | 32 ++++++++++++++++++++++++++++++++
1 files changed, 32 insertions(+), 0 deletions(-)
diff --git a/arch/mips/alchemy/devboards/pm.c b/arch/mips/alchemy/devboards/pm.c
index 632f986..4bbd313 100644
--- a/arch/mips/alchemy/devboards/pm.c
+++ b/arch/mips/alchemy/devboards/pm.c
@@ -10,6 +10,7 @@
#include <linux/sysfs.h>
#include <asm/mach-au1x00/au1000.h>
#include <asm/mach-au1x00/gpio.h>
+#include <asm/mach-db1x00/bcsr.h>
/*
* Generic suspend userspace interface for Alchemy development boards.
@@ -26,6 +27,20 @@ static unsigned long db1x_pm_last_wakesrc;
static int db1x_pm_enter(suspend_state_t state)
{
+ unsigned short bcsrs[16];
+ int i, j, hasint;
+
+ /* save CPLD regs */
+ hasint = bcsr_read(BCSR_WHOAMI);
+ hasint = BCSR_WHOAMI_BOARD(hasint) >= BCSR_WHOAMI_DB1200;
+ j = (hasint) ? BCSR_MASKSET : BCSR_SYSTEM;
+
+ for (i = BCSR_STATUS; i <= j; i++)
+ bcsrs[i] = bcsr_read(i);
+
+ /* shut off hexleds */
+ bcsr_write(BCSR_HEXCLEAR, 3);
+
/* enable GPIO based wakeup */
alchemy_gpio1_input_enable();
@@ -52,6 +67,23 @@ static int db1x_pm_enter(suspend_state_t state)
/* ...and now the sandman can come! */
au_sleep();
+
+ /* restore CPLD regs */
+ for (i = BCSR_STATUS; i <= BCSR_SYSTEM; i++)
+ bcsr_write(i, bcsrs[i]);
+
+ /* restore CPLD int registers */
+ if (hasint) {
+ bcsr_write(BCSR_INTCLR, 0xffff);
+ bcsr_write(BCSR_MASKCLR, 0xffff);
+ bcsr_write(BCSR_INTSTAT, 0xffff);
+ bcsr_write(BCSR_INTSET, bcsrs[BCSR_INTSET]);
+ bcsr_write(BCSR_MASKSET, bcsrs[BCSR_MASKSET]);
+ }
+
+ /* light up hexleds */
+ bcsr_write(BCSR_HEXCLEAR, 0);
+
return 0;
}
--
1.7.0
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH -queue] MIPS: Alchemy: devboard PM needs to save CPLD registers.
2010-02-23 17:57 [PATCH -queue] MIPS: Alchemy: devboard PM needs to save CPLD registers Manuel Lauss
@ 2010-02-23 22:59 ` Ralf Baechle
0 siblings, 0 replies; 2+ messages in thread
From: Ralf Baechle @ 2010-02-23 22:59 UTC (permalink / raw)
To: Manuel Lauss; +Cc: Linux-MIPS, Manuel Lauss
On Tue, Feb 23, 2010 at 06:57:43PM +0100, Manuel Lauss wrote:
> Save/restore CPLD registers when doing suspend-to-ram: fixes
> issues with harddisk and ethernet not working correctly when
> resuming on DB1200.
Thanks, queued for 2.6.34.
Ralf
^ permalink raw reply [flat|nested] 2+ messages in thread
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2010-02-23 17:57 [PATCH -queue] MIPS: Alchemy: devboard PM needs to save CPLD registers Manuel Lauss
2010-02-23 22:59 ` Ralf Baechle
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