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Commit 7c398988 authored by Richard Purdie's avatar Richard Purdie Committed by Russell King
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[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: default avatarRichard Purdie <rpurdie@rpsys.net>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent 1036260e

arch/arm/common/scoop.c

+18 −2
Original line number Diff line number Diff line
@@ -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);



		check_scoop_reg(sdev);

  		sdev->scoop_gpwr = SCOOP_REG(sdev->base, SCOOP_GPWR);

		SCOOP_REG(sdev->base,SCOOP_GPWR) = 0;

		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;

}

include/asm-arm/hardware/scoop.h

+2 −0
Original line number Diff line number Diff line
@@ -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 */