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authorRichard Purdie <rpurdie@rpsys.net>2005-10-10 10:20:06 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2005-10-10 10:20:06 +0100
commit7c3989885cfd37d237eca97832b712a7ffbbf40c (patch)
tree268bf1aeb7026eeceb7d70fb9c68d5d8de185c30
parent1036260e93a907a0143efa31bf05be1f3271eb90 (diff)
[ARM] 2962/1: scoop: Allow GPIO pin suspend state to be specified
Patch from Richard Purdie Allow the GPIO pin suspend states to be specified for SCOOP devices. This is needed for correct operation on the spitz platform. Signed-off-by: Richard Purdie <rpurdie@rpsys.net> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
-rw-r--r--arch/arm/common/scoop.c20
-rw-r--r--include/asm-arm/hardware/scoop.h2
2 files changed, 20 insertions, 2 deletions
diff --git a/arch/arm/common/scoop.c b/arch/arm/common/scoop.c
index d3a04c2a2c85..9e5245c702de 100644
--- a/arch/arm/common/scoop.c
+++ b/arch/arm/common/scoop.c
@@ -26,6 +26,8 @@ struct scoop_pcmcia_dev *scoop_devs;
struct scoop_dev {
void *base;
spinlock_t scoop_lock;
+ unsigned short suspend_clr;
+ unsigned short suspend_set;
u32 scoop_gpwr;
};
@@ -90,14 +92,24 @@ EXPORT_SYMBOL(reset_scoop);
EXPORT_SYMBOL(read_scoop_reg);
EXPORT_SYMBOL(write_scoop_reg);
+static void check_scoop_reg(struct scoop_dev *sdev)
+{
+ unsigned short mcr;
+
+ mcr = SCOOP_REG(sdev->base, SCOOP_MCR);
+ if ((mcr & 0x100) == 0)
+ SCOOP_REG(sdev->base, SCOOP_MCR) = 0x0101;
+}
+
#ifdef CONFIG_PM
static int scoop_suspend(struct device *dev, pm_message_t state, uint32_t level)
{
if (level == SUSPEND_POWER_DOWN) {
struct scoop_dev *sdev = dev_get_drvdata(dev);
- sdev->scoop_gpwr = SCOOP_REG(sdev->base,SCOOP_GPWR);
- SCOOP_REG(sdev->base,SCOOP_GPWR) = 0;
+ check_scoop_reg(sdev);
+ sdev->scoop_gpwr = SCOOP_REG(sdev->base, SCOOP_GPWR);
+ SCOOP_REG(sdev->base, SCOOP_GPWR) = (sdev->scoop_gpwr & ~sdev->suspend_clr) | sdev->suspend_set;
}
return 0;
}
@@ -107,6 +119,7 @@ static int scoop_resume(struct device *dev, uint32_t level)
if (level == RESUME_POWER_ON) {
struct scoop_dev *sdev = dev_get_drvdata(dev);
+ check_scoop_reg(sdev);
SCOOP_REG(sdev->base,SCOOP_GPWR) = sdev->scoop_gpwr;
}
return 0;
@@ -151,6 +164,9 @@ int __init scoop_probe(struct device *dev)
SCOOP_REG(devptr->base, SCOOP_GPCR) = inf->io_dir & 0xffff;
SCOOP_REG(devptr->base, SCOOP_GPWR) = inf->io_out & 0xffff;
+ devptr->suspend_clr = inf->suspend_clr;
+ devptr->suspend_set = inf->suspend_set;
+
return 0;
}
diff --git a/include/asm-arm/hardware/scoop.h b/include/asm-arm/hardware/scoop.h
index 527404b5a8df..a8f1013930e3 100644
--- a/include/asm-arm/hardware/scoop.h
+++ b/include/asm-arm/hardware/scoop.h
@@ -38,6 +38,8 @@
struct scoop_config {
unsigned short io_out;
unsigned short io_dir;
+ unsigned short suspend_clr;
+ unsigned short suspend_set;
};
/* Structure for linking scoop devices to PCMCIA sockets */

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